text:
|Publication number
|Publication type
|Application number
|PCT number
|Publication date
|Apr 26, 2011
|Filing date
|Apr 8, 2002
|Priority date
|Jun 26, 2001
|Fee status
|Also published as
|Publication number
|Wolfgang Kernchen
|Original Assignee
|Rohde & Schwarz Gmbh & Co. Kg
|Export Citation
|BiBTeX, EndNote, RefMan
|Patent Citations (16), Referenced by (2), Classifications (15), Legal Events (3)
|External Links: USPTO, USPTO Assignment, Espacenet
The invention relates to a measuring system having a signal generator which produces a digitally modulated high frequency measuring signal by modulation with modulation data, which signal is supplied to the input of a test unit, and having a signal analyser which is connected to the output of the test unit and analyses the output signal of the test unit after demodulation thereof.
Such measuring systems are used for example in the development and production of components of mobile radio technology. The signal analysers are for example spectrum analysers, vector signal analysers, time-domain analysers, code-domain analysers or system protocol testers. With these, in addition to the general measurements for instance of the level, of the spectrum etc., measurements are also implemented in which the received signal must be demodulated before analysis. The signal generators produce high frequency measuring signals corresponding to the transmission standard, for example GSM (global System for Mobile Communication) standard or a wideband CDMA (Code Division Multiple Access) standard for the third generation mobile radio UMTS (Universal Mobile Telecommunication Standard). In order to measure the bit error rate or the EVM (Error Vector Magnitude) or the phase or frequency shift error, it is necessary to compare the actual symbol sequence or actual bit sequence determined by the demodulation of the output signal of the test unit with the reference symbol sequence or the reference bit sequence with which the measuring signal supplied to the test unit was modulated in the signal generator.
In operating devices (mobile stations, base stations etc.), the useful data are provided with error protection data in the transmitter before modulation, said error protection data enabling an error correction for the receiver to a limited degree, i.e. the incorrectly received bits or symbols can be corrected to a limited degree.
This procedure would be possible fundamentally also with signal analysers. However, it would be disadvantageous that the signal analysers must control a large quantity of operating standards, for example both for the second generation and third generation mobile radio and it is not possible on grounds of complexity to implement the very different error correction methods of all operating standards in one universal signal analyser. In universally usable signal analysers, only universal demodulators, which cannot evaluate the error protection mechanisms, can therefore be used. Hence, in the case of universal signal analysers, the error protection methods cannot however be used for generating the reference symbol sequence or reference bit sequence, i.e. the signal cannot be analysed in all operating cases.
Even if demodulators were used in the signal analysers with the considerable complexity required therefor and which controlled the various error protection methods for all the operating standards occurring in practice, a further problem resides in the fact that measurements must also be implemented in which the test unit is supplied with a distorted signal not occurring in normal operation in order to test the test unit in boundary situations for testing the transition behaviour. For example, noise units and distortion units are present in the signal generators, which can supply the measuring signal with noise and distortion which is or are greater than the noise component occurring in normal operation or the distortion occurring in normal operation. Hence, in the measuring case, the energy per bit Eb in relation to the noise output N0 is smaller so that the error correction methods no longer permit complete correction of the bit or symbol errors and the reference bit sequence or reference symbol sequence cannot be completely reconstructed by using the error correction methods.
A further problem in the state of the art resides in the fact that synchronisation must take place with respect to various partial signal portions of the measuring signal. For example, in the case of a GSM signal, the TDMA frame (Time Division Multiple Access Frame) of which is divided into eight timeslots, must be synchronised with respect to a training sequence present in the middle of each slot as a synchronised bit sequence. In order to be able to be synchronised with respect to these training sequences, the synchronised bit sequences which the signal generator generates must be known to the signal analyser. This was only possible previously in that the synchronised bit sequences were input by hand via a keyboard into the signal analyser. This is laborious, leads to input errors and, in the case of frequent changing of the synchronised bit sequence, to a fairly long measuring time.
The object underlying the invention is therefore to produce a measuring system which is usable for the most varied of operating standards and with a high signal/noise ratio at a justifiable cost.
The object is achieved by the features of claim 1.
According to the invention, a direct connection is provided between the signal generator and the signal analyser, via which connection a reference signal of the signal generator is supplied directly to the signal analyser. Via this connection, signals or data can be transmitted which enable a simple reconstruction of the reference bit sequence or the reference symbol sequence in the signal analyser without a reconstruction from the measuring signal using error correction methods being required for this purpose.
The sub-claims relate to advantageous developments of the invention.
The reference signal can concern modulation data, the I/Q output signal of the I/Q modulator or for example the sequence of frequency values of an FSK method.
Advantageously, via the direct connection according to the invention between the signal generator and the signal analyser, a synchronised bit sequence can also be transmitted for synchronisation with respect to partial signals of the measuring signal.
In order to determine a possible time delay between the demodulation signal of the test unit and the reference signal, a corresponding correlator can be provided in the signal analyser. Furthermore a time shift device can be provided which corrects this time delay.
An embodiment of the invention is described in more detail subsequently with reference to the drawing. There are shown in the drawing:
According to the invention, a direct connection 7 is provided between the signal generator 2 and the signal analyser 5. The direct connection 7 can be configured either to be cable-connected or wireless, for example via transmitters and receivers which operate according to the Blue Tooth principle. A reference signal Ref is supplied via the direct connection from the signal generator 2 to the signal analyser 5.
The modulation data MD are used as reference signal Ref in a preferred embodiment. It is however also conceivable to use the I/Q output signals of the I/Q modulator 9 as reference signal Ref, which is indicated in dotted lines in
If the modulation data MD are transmitted via the connection 7 such that they arrive synchronously with respect to the corresponding demodulation data DD at the comparator unit 13, then the reference signal Ref can be supplied directly to the comparator unit 13. In general, running time differences between the signal path via the test unit 7 on the one hand and the direct connection 7 on the other hand are however present. The time delay X produced by the running time differences can be determined by a correlator 14, to the inputs of which the demodulation data DD on the one hand and the reference signal Ref on the other hand are supplied. In a time shift device 15, for example a buffer memory, the reference signal Ref can be displaced by a time shift Δt which corresponds to the time delay τ determined by the correlator 14. It is advantageous to transmit the modulation data MD via the connection 7 such that the modulation data MD arrive at the signal analyser 5 before the corresponding demodulation data DD are demodulated by the demodulator 12. The output of the time shift device 15 is supplied to an input of the comparator device 13.
The comparator device 13 compares the reference bit sequence or reference symbol sequence given by the modulation data with the actual bit sequence or actual symbol sequence given by the demodulation data DD and can hence establish incorrect bits or incorrect symbols and for example evaluate them as bit error rate BER or as EVM (Error Vector Magnitude). Due to the fact that a correct reference signal Ref is always available via the connection 7, the measurement can be implemented even with highly distorted signals and an evaluation of the error correction code (e.g. by means of a complex Viterbi decoder) is not required.
The reference signal Ref can be extended optionally with supplementary signals, which mark specific points in time in the data flow, for example the position of a frame of a timeslot of a burst or the beginning of a synchronisation sequence. The synchronisation sequence used currently by the signal generator 2 can in addition be transmitted via the reference signal Ref directly to the signal analyser 5. The laborious manual input of the synchronisation sequence into the signal analyser 5, which was normal previously, is dispensed with. The signal analyser 5 is hence also able to compare a large number of synchronisation sequences with the demodulation data DD since the signal analyser 5 is always informed about which synchronisation sequence the signal generator 2 is currently using. Hence the analysis becomes more rapid and/or the complexity in the signal analyser 5 is reduced. The parallel observation of all possible training sequences TS is dispensed with.
The advantage of transmitting the synchronisation sequence via the connection 7 is explained subsequently in the example of a GSM signal by means of
The sequence of the frequency values, which are caused to hop by the FSK modulator, can be transmitted as reference signal Ref with an FSK (Frequency Shift Keying) System.
|Cited Patent
|Filing date
|Publication date
|Jun 1, 1972
|Feb 26, 1974
|Apparatus and method for monitoring the operation of tested units
|Aug 6, 1987
|Sep 27, 1988
|Advantest Corporation
|Distortion measuring system method utilizing signal suppression
|May 1, 1986
|Jan 3, 1989
|Hitachi, Ltd.
|Test method of A/D converter
|Jul 24, 1990
|Oct 20, 1992
|Hewlett-Packard Company
|Measurement of characteristics of broadcast optical networks
|May 28, 1990
|Nov 9, 1993
|Brust Hans Detlef
|Process and system for rapid analysis of the spectrum of a signal at one or several points of measuring
|Jun 29, 1995
|Jul 21, 1998
|Qualcom Incorporated
|Method and apparatus for objectively characterizing communications link quality
|Sep 30, 1996
|Nov 17, 1998
|Nokia Mobile Phones Ltd.
|Method for measuring the timing of a received signal in a communication system and mobile station implementing the method
|Dec 19, 1995
|Jul 4, 2000
|Nokia Telecommunications Oy
|Base station having transmitter power adjustment system
|Mar 24, 1997
|Aug 29, 2000
|Anritsu Corporation
|Radio communication analyzer suited for measurement of plurality of types of digital communication systems
|May 22, 2000
|Nov 19, 2002
|Technology Service Corporation
|System for measurement of selected performance characteristics of microwave components
|Dec 19, 1997
|Aug 10, 2004
|Cisco Technology, Inc.
|Method and apparatus for using a spectrum analyzer for locating ingress noise gaps
|Nov 9, 2000
|May 17, 2001
|Advantest Corp
|Semiconductor test system for integrated circuit, has main computer which is connected with test device modules through test device bus for regulating entire operation
|Apr 24, 1995
|Oct 26, 1995
|Advantest Corp
|Compact digital signal modulation analyser for digital multiple channel access
|Title not available
|Jul 26, 1999
|Feb 10, 2000
|Gte Government Systems Corporation
|Interference detection and avoidance technique
|Jun 18, 1999
|Dec 28, 2000
|Societe Europeenne Des Satellites S.A.
|Method and apparatus for determining characteristics of components of a communication channel
|Citing Patent
|Filing date
|Publication date
|Apr 11, 2011
|Feb 26, 2013
|Tektronix, Inc.
|Method and apparatus for measuring symbol and bit error rates independent of disparity errors
|Nov 3, 2011
|Tektronix, Inc.
|Method and Apparatus for Measuring Symbol and Bit Error Rates Independent of Disparity Errors
|U.S. Classification
|375/226, 375/224, 375/225, 375/227
|International Classification
|Cooperative Classification
|European Classification
|Feb 26, 2004
Owner name: ROHDE & SCHWARZ GMBH & CO. KG, GERMANY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KERNCHEN, WOLFGANG;REEL/FRAME:014381/0203
Effective date: 20040204
|Aug 9, 2011
|Certificate of correction
|Oct 20, 2014
|Fee payment
Year of fee payment: 4


text:
The Latest On: Water
September 17, 2013 | Blog Post
September 11, 2013 | Blog Post
My Window Seat To America The Threatened
"If you want to see the places we've helped protect, ask for a window seat."
So reads my favorite Earthjustice message, decorating airports across the country. It's true: 35,000 feet is a great vantage to see the forests, mountains and river canyons that are intact, unroaded and resilient thanks to our legal work with many allies.
September 11, 2013 | Blog Post
Never Say Die in the Fight For Clean Water
September 10, 2013 | Photos
Saving the Pacific Salmon
September 9, 2013 | Blog Post
Looming Tahoe Deal Is a Bad Deal for the Lake
September 6, 2013 | Feature
Grand Canyon Of The Pacific Running Dry
September 5, 2013 | Blog Post
Alabama's Anti-Poison Powerhouse
August 27, 2013 | Blog Post
Govt. Loses Letters, So Let's Write Back for Clean Water
August 23, 2013 | Blog Post
Let The River Flow - Judge Grants Salmon a Chance To Live
August 16, 2013 | Blog Post

subset: commoncrawl


text:
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60 West Germantown Pike
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p 610.279.7878
f 610.279.1680
Map of East Norriton
East Norriton Office Hours
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Customer Service
Rosanna Elliott
Director of Operations
BergerHenry ENT
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To create response efficiencies, you may be greeted by an answering service. Don't worry. We are very quick to respond to phone calls.


text:
Alarm Will Sound
With 10 arrangers working with a 22-piece classical group, Alarm Will Sound's excellent reinterpretations of Aphex Twin's catalogue make the original efforts sound small in comparison. Aphex Twin is the celebrated British electronic producer who habitually tears apart his computers only to later resurrect them as supermodified weapons of digital cacophony. In the hands of Alarm Will Sound, Aphex Twin's oftentimes difficult compositions are rendered considerably more listenable. "Cock/Ver 10" channels the manic muse of Looney Tunes composer Carl Stalling, while more ambient offerings such as "Cliffs" sound as serene as a Debussy symphony. Throughout Acoustica, Alarm Will Sound manages to reaffirm Aphex Twin's technical genius as well as smooth over the rougher edges of his compositions.
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Using the Internet and other sources, write a research paper on the three classic geometry problems of Greek antiquity (see the Did You Know? on page).
Did You Know?
Classical Geometry Problems
Have you ever spent several hours trying to solve a difficult homework problem? Can you imagine studying the same problem for your entire life? Entire generations of mathematicians throughout history spent their entire lives studying three geometry construction problems that originated in ancient Greece. The three problems are (1) trisecting an angle, (2) squaring the circle, and (3) doubling the cube. Trisecting an angle refers to dividing a given angle into three equal angles. Squaring the circle refers to constructing a square that has the exact same area as the area of a given circle. Doubling the cube refers to constructing a cube that has exactly double the volume of a given cube. Eventually, mathematicians came to realize that if one is limited to using only an unmarked straightedge and a compass, then these constructions are impossible. Finally, in 1837 Pierre Wantzel proved the impossibility of the first two constructions, and in 1882 Carl Lindemann proved the impossibility of the third construction.


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Properties To Rent in Hackbridge, Wallington, Surrey
2 bedroom flatFoxglove Way, , Hackbridge, SM6 7JU
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The Regency Waterfront Hotel - Kuala Terengganu - Malaysia
The Regency Waterfront Hotel - Kuala TerengganuThe Regency Waterfront Hotel
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N.B. Please note that the star ratings are interpreted generously by the hotels in many countries.
N.B. Please note that the star ratings are interpreted generously by the hotels in many countries.
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text:
- Instrument:
- Level:
All That Jazz and Pizzazz - Book 2
Moderately Easy
By Walter and Carol Noona
Piano - Moderately easy
Moderately Easy. Composed by Walter and Carol Noona. Educational Piano Collection. Published by Heritage Music Press (LX.70-1431H).
Item Number: LX.70-1431H
Enjoy Walter and Carol Noona at their best with these all-new jazzy pieces that students are sure to love. The Noonas have a gift for pianistic flair with all of their many solos - and these pieces are no exception. From memorable melodies to infectious rhythms, these four volumes of music will fill a musical niche in your teaching studio and recital programs.
About Digital Downloads
Digital Downloads are downloadable sheet music files that can be viewed directly on your computer, tablet or mobile device. Once you download your digital sheet music, you can view and print it at home, school, or anywhere you want to make music, and you don't have to be connected to the internet. Just purchase, download and play!
PLEASE NOTE: Your Digital Download will have a watermark at the bottom of each page that will include your name, purchase date and number of copies purchased. You are only authorized to print the number of copies that you have purchased. You may not digitally distribute or print more copies than purchased for use (i.e., you may not print or digitally distribute individual copies to friends or students).


text:
Hello......long time no see!My pc was broken ..
I am in 12grade and it is time to decide what proffesion I want to study in college.
first of all I wanna be an Airline Transport Pilot.
my question is what its Aeronautic Engineer,what do they do ?
@@any help would be appreciated!!!!


text:
Want Free Shipping Every Day? Learn How.
Preview scale: 8.0 x 8.0 inches. Show Rulers

Change DPI Base size is 150
Collection: Asian Fusion-Diamond Stripes
Japanese - influenced designs, digitally created, altered & enhanced.
My Roostery Shop - custom designed products:
Visit this designer's shop
Pattern derived from Japanese kimono designs. Brown & white with linen texturing.
diamond (5540),
asian (2176),
mid century (1493),
taupe (767),
off white (219)
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More colors of this pattern are in the pipeline and will be available soon!
Posted almost 4 years ago.
© 2008-2015 Spoonflower Inc


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Free personalized radio that
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heavy use of samples
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consistent rhyme patterns
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street talkin' lyrics
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acoustic drum samples
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Nuts about coffee. I love to grab my iPad and write articles from my blogs enjoying a great cup of coffee at a favourite restaurant. BEWARE I HATE BAD COFFEE
Foursquare © 2016 Lovingly made in NYC & SF
Download Foursquare for your smart phone and start exploring the world around you!


text:
Type: Posts; User: PorkChopExpress
a great success, works awesome!!!
as with real cars more fun is in the modding then the actual outcome. ;)
the end mill is really a brute to the fins so i had to figure out the fastest way to trim them. took about 1/4 inch off the...
so, i upgraded to 2s and 3s lipos and its a whole new car, but the componts now get boiling hot with my playful bashing. i had to takepreemptive measures.
step one. install new heatsink...


text:
9 colors
Pisarro Nights Embellished Mesh Sheath Dress (Regular & Petite)
Women's Adrianna Papell Boatneck Lace Sheath Dress, Size
A racy lace overlay and industrial-chic exposed zipper detail lend contemporary appeal to a classic boatneck sheath dress. Color(s): black, black nude, black/ nude, cappuccino/ ivory, cappucino, chianti/ red, citrus/ ivory, deep turquoise, dnupink, emerald, fuchsia/ guava, gunmetal, hunter, ivory, mulberry, mulberry nude, navy, navy/ nude, neptune, pink, prussian blue, ... Learn More
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Women's Diane Von Furstenberg 'Zarita' Lace Sheath Dress,
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Petite Women's Tadashi Shoji Off The Shoulder Mixed
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Petite Women's Halogen Seamed V-Neck Ponte Sheath Dress,
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text:
Five Greyhounds Selected To All-BIG EAST Teams
May 1, 2013
PROVIDENCE, R.I. - The Loyola University Maryland women's lacrosse team placed five Greyhounds on the 2013 All-BIG EAST first or second team, as announced by the league at a banquet Wednesday night. Junior Marlee Paton and redshirt sophomore Taryn VanThof were included on the first team, while sophomores Hannah Schmitt and Annie Thomas, in addition to freshman Maddy Lesher, were members of the second team.
Paton is making her third-straight appearance on an all-conference team and her second-straight on the first team. The 2012 BIG EAST Midfielder of the Year, Paton leads the Greyhounds with 33 goals, 20 assists, 53 points, 35 ground balls and 31 caused turnovers this season. The Seaholme, Australia native also recorded her 100th career goal and 50th career assist this year, becoming the ninth Greyhound in program history to reach both 100 goals and 50 assists, and just the second to do so in their junior season. In three seasons, she has recorded 125 goals and ranks sixth at Loyola with 66 assists and eighth with 191 points.
VanThof is earning her first BIG EAST honor. The redshirt sophomore missed the entire 2012 season due to injury but the midfielder from Livonia, N.Y., has returned to the lineup to rank second on the team with 39 points and 22 caused turnovers this season. She also has 23 goals and 16 assists this year, while her team-best 60 draw controls ranks fifth in the BIG EAST and fourth in Loyola's all-time single-season records.
Lesher is making her first appearance on the all-conference team after consistently shutting down opponents' top attackers all season. A freshman from Gladwyne, Pa., Lesher has stepped up to be a mark-up defender this year and has recorded 25 ground balls and 17 caused turnovers.
Thomas is garnering her second-consecutive BIG EAST honor after being included on the first team a year ago. A native of Bel Air, Md., Thomas leads the Greyhounds with 20 assists this year. In a win at Villanova, Thomas tied Loyola's program record for assists in a game, dishing out seven. She followed that up with four points in a win at Rutgers to become just the eighth Greyhound to reach 100-career points in their sophomore season. Throughout her career, she has 56 goals, 51 assists and 107 points.
Schmitt has been included on the all-conference second team for the second-straight year. An attacker from Malvern, Pa., Schmitt has recorded two game-winning goals this year, including a goal in sudden-death overtime at No. 6 Notre Dame that handed the Fighting Irish their first loss of the season. Schmitt was named the WomensLax.com National Player of the Week after the game, and has recorded 28 goals and 34 points this year.
The third-seeded Greyhounds will open play at the 2013 BIG EAST Tournament tomorrow, facing second-seed and host Georgetown at approximately 8 p.m. at Multi-Sport Field.
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I'm using a Canon Pixma MP282, attached to a Windows XP machine and I want to print to it from my Ubuntu machine on the same network.
The Ubuntu machine finds the printer ok, and the verify button confirms that the print share is accessible, but when when I click on the forward button it asks me to choose a driver, and the Canon Pixma MP282 is not an option.
I downloaded the driver in a tar file, opened it with the archive manager, which gave me three files with ugly names ending in tar.gz, selected them all and clicked extract, but I still don't get an option to select it.
What am I doing wrong?


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IRVING (AP) – Big 12 Conference schools will share record revenue of just more than $220 million for the 2013-14 school year.
Commissioner Bob Bowlsby said Friday at the end of the league's spring meetings that the eight continuing members of the Big 12 will get about $23 million each. Those schools are Baylor, Iowa State, Kansas, Kansas State, Oklahoma, Oklahoma State, Texas and Texas Tech. Second-year league members TCU and West Virginia, who will become fully vested Big 12 members in two years, will get about $14 million each.
The amount of distributable revenue, an increase from $198 million last year, was about $7.8 million more than expected. That $7.8 million will go into a reserve fund that could be used for legal or unforeseen expenses.
(© Copyright 2014 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)
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|Publication number
|Publication type
|Application number
|Publication date
|Apr 6, 1993
|Filing date
|Oct 2, 1991
|Priority date
|Oct 2, 1991
|Fee status
|Also published as
|Publication number
|Bernard S. Fritz
|Original Assignee
|Honeywell Inc.
|Export Citation
|BiBTeX, EndNote, RefMan
|Patent Citations (13), Non-Patent Citations (3), Referenced by (11), Classifications (17), Legal Events (5)
|External Links: USPTO, USPTO Assignment, Espacenet
The present invention relates to an optical head which is simple in construction, minimizes optical components, employs only one beam splitting surface and is useable with a magneto-optic recorder in a ruggedized environment with the capability of monitoring power level presented to the recording medium and monitoring focussing separately from the digital data output.
Optical recording heads are well known in the art as are magneto-optic recorders. In such systems, light, from a source such as a laser diode, is often directed through a beam splitter to a recorder which may take the form of a magneto-optical recorder comprising a substrate with a magnetic film formed thereon. The light from the laser source is polarized and when focused on the magnetic film in the vicinity of a switchable magnetic field it produces a heating effect which causes the film to assume a direction of magnetization in a first or second sense depending on the magnetic field. Subsequent reflection of polarized light from this surface rotates the polarization slightly in a first or second sense. The reflected light is directed therefrom to a suitable detector which can determine the polarization sense and use this information for providing a digital data output. Descriptions of such basic systems may be found in a book entitled "Optical Recording A Technical Overview" by Allen Merchant and published by Addison-Wesley Publishing Company. Section 4.1 (pp. 68-74) describes magneto-optical systems and Section 8.4 (pp. 209-219) describes concepts for magneto-optic heads. Another example may be found in the Tomita U.S. Pat. Nos. 4,639,816 issued Jan. 27, 1987 and 4,569,035 issued Feb. 4, 1986. In these basic systems, although some monitor power level and focus, no provision are made for monitoring the focus of the objective lens so as to maintain the proper focus of the system on the magnetic film separately from the digital data output and no provisions are made for monitoring the power level of the input light so as to maintain this level relatively constant at the magnetic film during operation. A system which monitors the power and controls the output of the laser input in accordance therewith, and which monitors the focus condition of the objective lens may be seen in the Wilson et. al U.S. Pat. No. 4,799,210 issued Jan. 17, 1989. This system, however, does not use polarization rotation for it data recording. Furthermore, it monitors the power level before the beam is split so that the power level is not truly representative of the power reading at the recording medium. Also it does not separately monitor the focus of the objective lens with the result that "cross talk" is introduced in the output signals. Furthermore, the system requires there be at least two beam splitting surfaces for the light paths involved and because considerable difficulty and cost is associated with creating a proper polarized beam splitting (PBS) surface such systems are overly costly. It should also be noticed that the number of optical parts involved in the prior art systems are relatively high and it is desirable to reduce the number of optical parts to a minimum as is explained in an article by Y. Yamanaka et al. entitled "Compact Magneto-Optical Disk Head Integrated With Chip Elements" from the SPIE Vol. 1499 entitled "Optical Data Storage '91" by James J. Burk et al. sponsored by the Optical Society of America.
The present invention provides a simple and compact design for an optical head in which the number of surfaces that need be coated with beam splitting material is minimized as is the number of optical parts involved. The design is such that it is small in size and is capable of use in ruggedized environments such as in aircraft and spacecraft. Also the power to the magnetic film is monitored and the channels for monitoring the focus and output data are different.
The present invention utilities a single rhomboid prism having but one surface that is coated with an optical beam splitting material. The input light travels through this surface to a second surface of the rhomboid prism that is totally internally reflecting and from there back through the beam splitting surface where two beams are created a first of which contains a majority of the energy and is directed to the magnetic recording material while the remaining minority of the energy is directed to an optical power monitor. Radiation reflected from the surface of the magneto-optic recorder again passes through the single beam splitting surface and again the minority of this energy is reflected to a suitable detector while the remaining majority of the energy passes back into the rhomboid prism, is internally totally reflected and finally emerges from the prism to a detector which is used for monitoring and maintaining the proper focus position of the objective lens.
FIG. 1 is a schematic view showing the optical paths of radiation to the various components of the present invention.
FIG. 2 is a side view of FIG. 1 taken along lines 2--2.
FIG. 3 is a schematic diagram of another embodiment of the present invention in which non-collimated radiation is employed.
In describing the present it should be born in mind that the design is intended for use in an environment which requires ruggedization since it is likely to encounter severe stress in connection with vibration and gravitational forces. It should also be born in mind that the system is created with a view towards simplicity and small size as well as low cost in order to maximize its benefits in such an environment. In such a design, a monolithic optical head is used so as to minimize thermal and vibrational sensitivities of the optical components and due to inherently weak data signal of the magneto-optic media, careful consideration is given to maintaining the data signal level as high as possible in spite of the environmental variation. Pursuing the minimization of the optical components further reduces source errors that would affect the data signal level and having a single PBS coating reduces the sensitivity to temperature and humidity variations. Of course, the PBS coating is tailored to reflect as much as possible (nearly 100%) of the S polarization component of the incident light and to pass a high percentage (about 80%) of the P polarization component. The design form makes use of total internal reflection to reduce transmission losses at the various signal path folds and the three functions of power monitoring, data signal detection and focus monitoring are included in the system. It will be noted in connection with the description that transmission from the source to the recording material requires passing the beam through the PBS coating twice which improves the degree of linear polarization by reducing the elliptical polarization affects which the polarization preserving coupling fiber might impart on the beam.
With this in mind, attention is directed to FIG. 1 wherein an optical system 10 is shown mounted so that it may be moved by a motive means 12 operating through a mechanical connection shown as dashed line 13 so as to import up and down motion as shown by double headed arrow 14.
A rhomboid prism 20 is shown in FIG. 1 with a lower or first surface 21 upon which a PBS coating 23 has been deposited. As mentioned the PBS coating is tailored to reflect as much possible "S" polarization component as possible and to pass a high percentage of the "P" polarization component.
Radiation or light from a suitable source 30, which may be a laser diode or a laser diode with a fiber optic coupling attached thereto, is shown transmitting polarized radiation along lines such as 32, 33 and 34 to a collimating lens 36 which directs collimated beams of radiation shown by lines such as 37, 38 and 39 through a right angled prism 40 which has its hypotenuse cemented to an upper portion of the surface 21 so that the radiation strikes the PBS coating and is split into 2 beams, one of which containing nearly all of the "S" polarization component is reflected downwardly and out of the system while a majority (about 80%) of the "P" component passes to the interior of the rhomboid prism 20 along lines such as 42, 43 and 44. This radiation after passing though the rhomboid prism 20 strikes an upper or second surface 46 of rhomboid prism 20 at such an angle that it is substantially totally reflected downwardly in FIG. 1 along lines such as 47, 48 and 49.
This radiation containing a high "P" polarization component passes through the lower portion of the PBS coating 23 where, again, substantially all of any "S" polarization component that may be left and a low percentage (about 20%) of the remaining "P" polarization component is reflected and a high percentage (about 80%) of the remaining "P" polarization component passes through the PBS coating 23 onto a second right angled prism 50 which has its hypotenuse cemented to a lower portion of the surface 21 of rhomboid prism 20. This energy passing along lines such as 52, 53 and 54 passes through prism 50 to a mirror 60 cemented to the bottom of the optical system 10 along one edge of the right angle prism 50. Mirror 60 and it's relationship to the rhomboid prism 20 is better seen in FIG. 2.
After reflection from mirror 60 the radiation passes along lines such as 62 through an objective lens 64 which is shown to be movable by motive means 66 operating through a connection shown as dash line 68 (FIG. 1) to move the lens back and forth, for example by rotating it in a threaded arrangement 70 so as to produce the motion along lines such as the double headed arrow 72 in FIG. 2. As will be explained this will allow the lens to be properly focused on the recording medium at all times. The portion of the energy which was reflected in the lower part of the PBS coating of FIG. 1 is directed along lines such as 72, 73 and 74 through a lens 75 which is cemented to one of the end surfaces 77 of rhomboid prism 20. Lens 75 has a relatively short focal length so that the energy passing therethrough along .lines such as 80, 81 and 82 is focused on a detector 85 so as to produce an output along a line 87 to suitable electronic system shown as box 88 which produces an output along line 89 which adjusts the level of radiation produced by source 30 in order to maintain the amount received by the recording medium relatively constant as is desired.
As best seen in FIG. 2, the radiation passing through the objective lens 64 as shown by a line 90 and is focused through a substrate 92 onto a layer of magnetic recording material 94 which is proximate to a permanent magnet or an electromagnet 96. As is known in magnetic optical recording,-this produces a thermal effect and rotates the polarization of a beam reflected from the material in a first or opposite direction in accordance with the orientation of the magnetic field produced by the magnetic 96. As mentioned, magnet 96 may be either a permanent magnet which can be switched so as to have its direction of magnetization changed or can be an electromagnetic which changes direction of polarization with the direction of current therethrough. As shown in FIG. 2, magnet 96 lies radially along surface of the magnetic material 94 but, if desired, a small magnetic may be utilized which would then have to be moved with lens 64 so as to be, at all times, directly beneath the beam 90 where it is focused on the material 94.
The magnetic material 94 and the substrate 92 are mounted for rotation about an axis defined by a shaft 98 which may be controlled by a motive means 99 operating through a connection shown as dashed line 100. In order to place information upon the magnetic recording apparatus, the substrate 92 and its coating of magnetic material 94 are rotated by the motive means 99 to various angular positions and, as explained above, the optical apparatus 10 is movable up and down in FIG. 2 along the direction shown by double headed arrow 14. Fine tracking may be performed by sample servo technique (not shown) such as described in the above-mentioned book "Optical Recording A Technical Overview" on pages 180 and 181 so as to produce a plurality of discrete positions along the magnetic recording material 94 where information can be deposited.
In order to read the information which has already been placed on the magnetic material 94, the same apparatus as above described is employed and the radiation which strikes the magnetic material 94 has its polarization direction rotated and is reflected back through the substrate 92 and along the paths such as shown by line 90 to the objective lens 64 where it is again collimated and directed back towards mirror 60 along lines such as shown by reference numeral 62. Mirror 60 reflects the return radiation upwardly through the right angled prism 50 along the lines such as shown by reference numerals 52, 53 and 54 in FIG. 1 where such reflected radiation again strikes the PBS coating in the lower portion of the surface 21 of rhomboid prism 20. Again a relatively small portion (20%) of the such radiation is reflected along paths such as shown by reference numerals 102, 103 and 104 in FIG. 1. This radiation passes out of the right angle prism 50 into a rectangular Wollaston prism 105 which divides the radiation into two portions in well-known manner. The Wollaston Prism, preferably quartz to lower cost, is oriented such that if no data signal is present on the magneto optic media, an equal amount of energy is in each of the two portions. If the data on the magnetic recording device causes rotation of the polarization in a first direction, then the amount of energy in a first of the two portions will be greater than the second. If the rotation is in the opposite direction, then the second portion will contain more energy than the first.
In any event the two portions of energy from the Wollaston Prism pass through a lens 110 and are directed along lines such as shown by reference numerals 112, 113 and 114 to be focused on a detector 120 which operates to determine which, if either, of the two portions of energy is greater than the other. This determination produces an electrical signal upon a line such as shown by reference numeral 122 which then passes to a suitable utilization device such as a computer (not shown).
In order to maintain the lens 64 in the proper focus position, the majority of the energy reflected from the magnetic recording material 94 in FIG. 2 and reflected off of mirror 60 in FIG. 1 passes through the PBS coating 23 and back into the rhomboid prism along lines such as 47, 48 and 49. Here again, there is total internal reflection off the upper surface 46 of rhomboid prism 20 and the energy is reflected to the left along lines such as 42, 43, and 44 to the upper portion of the PBS coating 23. A major portion of this energy passes again through the PBS coating and is lost into the right angle prism 40 but the minority of the energy is reflected from the upper portion of the PBS coating 23 and passes upwardly along lines such as 130, 131 and 132 where it is again totally internally reflected from the upper surface 46 of rhomboid prism 20 to the left along lines such as 136, 137 and 138. This energy is passed through a focusing lens 140 and a cylindrical lens 142 along lines such as 146, 147 and 148 to be focused as a line of light on a detector 150. Detector 150 operates to determine whether the focus position is proper and produces an output along a line 152 which is presented to the suitable electronics 154 which has an output along a line 156 operable to control motor 66 to position lens 64 in a direction shown by the double headed arrow 72 (FIG. 2) to maintain the proper focus.
The detectors 85, 120 and 150 may all be the same type of detector which, for example, may be a four sector detector such as produced by the Silicone Detector Corporation with a part No. SD 055-23-21-011 or like that described in the above-mentioned book "Optical Recording A Technical Overview" pages 165-172. Considering detector 150, when properly focused, the signal on the four sectors will be a circle and each sector will receive the same energy, but in an out-of-focus condition the circle changes to an ellipse and eventually becomes a line oriented in a first or opposite direction depending on the direction lens 64 is away from the proper focus position. Thus the sectors will receive unequal amounts of radiation and by determining which ones are larger, detector 150 can determine the amount and direction of the out-of-focus condition. The electronics in box 154 would operate to sum the outputs from opposite quadrants and then difference these sums to determine which quadrants were greater or determine that they were equal.
Detector 120 operates in a similar way but only needs two quadrants. The two beams from the Wollaston prism would be focussed, one each on the quadrants and the output on line 122 would be two signals which the utilization device would compare to read a "1" or a "0" indicative of the orientation of the return radiation and thus the code on the magnetic recording.
Detector 185, on the other hand, may use all four sectors to measure the total amount of energy received for purposes of controlling the energy level of the source 120. The electronics 88 would sum the four signals and compare this to a reference value.
It should be noted that the system comprises a single rhomboid prism having a single PBS coated surface and so arranged that the rays of energy from the source to the recording medium pass through this single coating twice to reflect a maximum amount of the "S" polarization component out of the system and after reflection from the recording medium the energy is again reflected from the PBS coating to pass a minority of the "P" polarization component and substantially all of the "S" polarization component introduced by the data on the recording medium to the data detectors. It should also be noticed that by cementing the components together, a single unitary or monolithic structure is formed and the number of separate optical parts is reduced to a minimum.
The systems of FIGS. 1 and 2 operate with light when it is desired to have collimated radiation in the system. If such requirement is not necessary, then a system such as shown in FIG. 3 may be employed and even further reduce complexity and the number of components used.
In FIG. 3, the elements having the same function as in FIGS. 1 and 2 have the same reference numeral. It should be noted that the only basic difference between FIGS. 1, 2 and 3 is that the light from the source 30 no longer passes through a collimating lens, but is rather divergent as it strikes the right angle prism 40 and passes through the upper portion of surface 21 of rhomboid prism 20. As before, nearly all of the "S" polarization component is reflected out of the system and the 80% of the "P" polarization component continues into the rhomboid prism 20 and is totally internally reflected from the second surface 46. After reflection, the radiation continues to diverge as the strikes the lower portion of surface 21 where a minority is reflected to lens 75 to be focussed on detector 85 to provide power control, as before. The majority of the energy which passes through the lower portion of the surface 21 is collimated by lens 158 and is focussed on to the magnetic material 94 by the objective lens 64. In FIG. 3, the mirror 60 which operated to fold the energy in FIGS. 1 and 2 has been omitted since this folding mirror is not required in all cases. In any event, energy reflected from the magnetic material 94 again strikes the lower portion of surface 21 and a minority portion is again reflected to the detector 120 through right angle prism 50 and Wollaston prism 105. The majority of the reflected energy from the magnetic material 94 passes through the PBS coating is again totally internally reflected from the upper surface 46 and then converges towards the left where it is reflected by the PBS coating 23 upwardly to be finally totally internally reflected off the upper surface 46 to the left and through the focusing lens 140 and cylindrical lens 142 to the detector 150. The external circuitry has not been shown in FIG. 3, but in all respect acts the same as it did in respect to FIGS. 1 and 2 and need not be further described herein.
It is therefore seen that I have provided a simple compact and ruggedized optical recording head for use with a magneto optical recording system that has separate data signal, focus signal and power monitor paths and that the recording head minimizes the number of optical components and utilizes but a single PBS coating along one surface of the rhomboid prism.
Although the present invention has been described with reference to the preferred embodiments, workers skilled in the art will recognize that changes may be made in form and detail without departing from the spirit and scope of the invention.
|Cited Patent
|Filing date
|Publication date
|Sep 6, 1983
|Feb 4, 1986
|Canon Kabushiki Kaisha
|Magneto-optical information reading apparatus
|Sep 19, 1983
|Dec 2, 1986
|Canon Kabushiki Kaisha
|Optical head and method of detecting the focus thereof
|Sep 26, 1983
|Jan 27, 1987
|Canon Kabushiki Kaisha
|Magneto-optical recording medium
|Aug 10, 1984
|Mar 31, 1987
|Canon Kabushiki Kaisha
|Optical head
|Dec 8, 1986
|Sep 13, 1988
|U.S. Philips Corporation
|Device for scanning a radiation-reflecting information surface with optical radiation
|Nov 5, 1986
|Jan 17, 1989
|Unisys Corporation
|Fiber optic read/write head for an optical disk memory system
|Dec 11, 1986
|Sep 12, 1989
|International Business Machines Corporation
|Read/write head for optical disks
|Apr 21, 1988
|Mar 13, 1990
|Canon Kabushiki Kaisha
|Optical pickup apparatus
|May 1, 1989
|May 8, 1990
|U.S. Philips Corporation
|Apparatus for optically scanning an information plane
|Aug 22, 1988
|Jan 29, 1991
|Eastman Kodak Company
|Magneto-optic playback apparatus including astigmatic diffracting means
|Jun 21, 1988
|Jul 9, 1991
|Mitsubishi Denki Kabushiki Kaisha
|Optical information recording/reproducing apparatus
|Oct 25, 1989
|Nov 19, 1991
|Fuji Electric Co., Ltd.
|Output stabilizing apparatus for an optical head
|May 22, 1989
|Dec 3, 1991
|Hewlett-Packard Company
|Wedge prism assembly for optical information storage
|Optical Data Storage '91, section entitled "Compact Magneto-Optical Disk Head Integrated with Chip Elements", pp. 263-268 from Optical Society of America, Feb. 25-27, 1991.
|Optical Data Storage 91, section entitled Compact Magneto Optical Disk Head Integrated with Chip Elements , pp. 263 268 from Optical Society of America, Feb. 25 27, 1991.
|Optical Recording, "A Technical Overview", Alan B. Marchant, pages 68-74; 165-72; 180-181 and 209-219.
|Citing Patent
|Filing date
|Publication date
|Oct 1, 1992
|Jul 5, 1994
|Ruggedized homogeneous thin dielectric film focus sensor
|Sep 15, 1993
|Jun 27, 1995
|Ricoh Company, Ltd.
|Optical head
|Jan 10, 1994
|Feb 27, 1996
|Eastman Kodak Company
|Write verification in an optical recording system by sensing mark formation while writing
|Jun 3, 1993
|Apr 2, 1996
|Goldstar Co., Ltd.
|Optical pick-up system with servo using reflection plate having aperture
|Jun 7, 1995
|May 13, 1997
|Eastman Kodak Company
|Level detector for detecting a voltage level of a signal
|Feb 20, 1996
|Jul 7, 1998
|Matsushita Electric Industrial Co., Ltd.
|Optical pickup incorporating an integrated optical guide member
|Jun 26, 1997
|Nov 2, 1999
|Matsushita Electric Industrial Co., Ltd.
|Method of manufacturing integrated optical pick-up
|Oct 27, 1997
|Feb 1, 2000
|Daewoo Electronics Co., Ltd.
|Knife edge method for use in an optical pickup system
|Feb 21, 2002
|Aug 8, 2006
|Samsung Electronics Co., Ltd.
|Reflection type compound prism and optical pickup apparatus employing the same
|Feb 21, 2002
|Nov 21, 2002
|Samsung Electronics Co., Ltd.
|Reflection type compound prism and optical pickup apparatus employing the same
|Jan 14, 2002
|Nov 6, 2002
|Samsung Electronics Co., Ltd.
|Reflection type compound prism and optical pickup apparatus employing the same
|U.S. Classification
|International Classification
|Cooperative Classification
|European Classification
|Oct 2, 1991
Owner name: HONEYWELL INC.,, MINNESOTA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:FRITZ, BERNARD S.;REEL/FRAME:005871/0347
Effective date: 19911002
|Apr 19, 1994
|Certificate of correction
|Sep 20, 1996
|Fee payment
Year of fee payment: 4
|Sep 28, 2000
|Fee payment
Year of fee payment: 8
|Sep 29, 2004
|Fee payment
Year of fee payment: 12


text:
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text: Item is not available Find Another One Others Looked At... Browning Superposed Midas Grade 12 Ga Lo... SELLER: Shooting Investments 1 $13,999.00 Browning 725 .410 SELLER: Southwest Shooter Supply 1 $2,795.00 Browning Silver 12 Gauge 11403204 SELLER: Fort Apache Guns 1 $1,219.00 Browning Silver 12 Gauge 11403205 SELLER: Fort Apache Guns 1 $1,219.00 Browning Superpose 20 gauge O/U SELLER: GulfCoastGuns 1 $2,200.00 Browning Superposed 12ga 2 3/4" M/IC SELLER: Kones Korner 1 $1,149.00 Guns Shotguns Browning Shotguns Over Unders Other OU Hunting Browning Superposed GA | 120 | 85 | Lc | 265.6131ms Browning Superposed 20 GA For Sale from Boise Gun Company | Positive feedback: 88% View | Verified Seller | 1638 Completed Sales View Sellers Items This item is no longer available. /UserImages/194/933357478 4182783.jpg /UserImages/194/933357478 4182784.jpg /UserImages/194/933357478 4182785.jpg /UserImages/194/933357478 4182786.jpg /UserImages/194/933357478 4182787.jpg /UserImages/194/933357478 4182788.jpg /UserImages/194/933357478 4182789.jpg /UserImages/194/933357478 4182790.jpg /UserImages/194/933357478 4182791.jpg /UserImages/194/933357478 4182792.jpg /UserImages/194/933357478 4182793.jpg /UserImages/194/933357478 4182794.jpg /UserImages/194/933357478 4182795.jpg /UserImages/194/933357478 4182796.jpg /UserImages/194/933357478 4182797.jpg /UserImages/194/933357478 4182798.jpg Description Shipping and Payment More Info Browning Superposed 20 GA Model: Superposed Condition: Used Caliber/Gauge: 20 GA Serial Number: 35399V5 Action: Over and Under Shotgun Metal Finish: Blued Steel Receiver/Frame: Steel receiver Barrel Length: 28" Steel barrels Stock/Grips: Wood stock L.O.P.: 14.5" length of pull over Browning butt plate Sights: Front bead sight Accessories: None Box: None Manual: Not Included Comments: In very good condition, stock has some wear but is free of large dents and cracks. Bores are excellent, mechanically excellent. A very nice gun. Log: 38397 (A045) Buyer must pay $30.00 shipping to the lower 48 states. Alaska and Hawaii must pay $35.00 for hand guns $50.00 for long guns. Firearms must be shipped to an FFL Payment must be made with cashier's check or money order; no personal checks. If paying with credit card, a 3% charge will be added to the final price. Idaho residents must also pay 6% sales tax. Payment must be received within 7 days. We are on Facebook, or follow us on Twitter! @BoiseGunCo Trades Accepted: We offer no terms or trades. Payment can be made by cashier's check, money order or credit. If paying by credit card, a 3% charge will be added to the final price. Boise Gun Company specializes in collectible firearms and has over 6000 firearms in store. If you have any questions, feel free to email us, or give us a call between 10am-6pm Mtn Mon-Sat. All prices reflect a 3% cash discount. Condition: Used - See Item Description Caliber: 20 Gauge Location: ID Share Item Item #: 933357478 Stock No.: Log: 38397 This item is no longer available. Price: Shipping: See Description (or Arrange local transfer) Accepted Payment Methods: Returns: 3 Days Boise Gun Company Seller Since: Feb. 2000 Seller Level: Trusted Seller This seller is an FFL City: Nampa State: ID More Items from this Seller ( 402 items total | View All ) Westley Richards boxlock ... $35,000.00 Full Details Add To Cart Colt 1903 32 ACP $399.99 Full Details Add To Cart Colt 1903 32 ACP $549.99 Full Details Add To Cart Mc | 31.2444ms -- 194 Your Recently Viewed Items


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Escape the Chinese room to uncover captivating secrets! Search your surroundings to discover useful clues and valuable items. You can move around the room to explore, and point your cursor at objects to gather information. Collect coins for the ancient doll!
Chinese Secret is one of our selected Point and Click Games . Also very popular on this website right now are Trollface Quest 13, Monkey Go Happy Madness, Baby Hazel Ballerina Dance and Monkey GO Happy Ninjas.
Report game as broken
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A rotten stinch that smells like a combo of ass and pussy
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female gouch; see also gouch and machismo
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Spotted: Jennifer Garner running errands with daughter Violet, sporting a casual blazer that conceals her growing baby bump. The actress recently announced that she was expecting a third child with husband Ben Affleck.
Click through to see more pictures of pregnant Jennifer Garner on X17online.com.
Email us corrections or feedback.


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Bachelor of Engineering Technology
Flinders University
Bachelor Degree (Pass)
|Mid Year Intake?
|Study Mode
|Entry Requirements
|Bedford Park
|Not available*
|Full-time internal, Part-time internal
Year 12 or equivalent qualifications; or mature age entry (STAT); or TAFE/VET qualifications; or higher education transfers; or completion of a foundation studies program; prerequisites: SACE Stage 2 Specialist Mathematics, Mathematical Methods or Mathematical Studies; assumed knowledge: Stage 2 Physics
Course Description
This program equips students with the knowledge to become an engineering technologist. The degree offers specialisations in Biomedical Engineering, Electrical and Electronic Engineering, Mechanical Engineering, and Software Engineering. This course enables students to transfer to a four-year Bachelor of Engineering award, often with no loss of time.
Subjects you can Study
Engineering-biomedical; Engineering-electrical; Engineering-electronic; Engineering-mechanical; Engineering-software
* Cut-off scores may not appear with some courses. There a number of possible reasons for this: The course may require entrance criteria other than a cut-off score, such as a portfolio, an interview or an audition; the course may not be open to school leavers; cut-off information may be unavailable. Check the detailed course information available on The Details tab to read more about the course's entry requirements.
About Flinders UniversityFlinders is a leading international university in Australia, distinguished by its boldness, vigour and imagination. The University has a record of excellence and innovation in teaching, research and community engagement.
While the main campus is located in the suburb of Bedford Park, just a short drive south of Adelaide's Central Business District and easily accessible by public transport, the University's geographical footprint also stretches across South Australia, Western Victoria and the Northern Territory.
Flinders has over 2,600 staff and more than 24,000 students, with over 4,200 coming from countries as diverse as Canada, India and Kenya. Its graduates are encouraged to be knowledgeable, to communicate effectively, and to develop skills to connect across boundaries and tackle major challenges.
Flinders has led the way in providing access to higher education for individuals who did not traditionally aspire to University, and offers a choice of pathways that cater to people from a variety of backgrounds.
Offering over 140 undergraduate and 280 postgraduate courses, Flinders prides itself on the quality of its programs and the attention given to the learning experience of its students.
Provider CRICOS: 00114A
Bachelor Degree (Pass)
Bedford Park
- Full-time internal = 3 years
- Part-time internal = 6 years
First year comprises topics in fundamental science and engineering including electronics, professional skills, computer programming and mathematics plus some choice of topics from a student's preferred specialisation. Second and third year then builds on this base with topics from a variety of areas that depend on the specialisation option chosen. Specialisations are chosen from either biomedical, civil, electrical and electronic, mechanical or software engineering. Third year provides further studies and scope to take selected electives. In addition Engineering Technology students undertake an engineering project, engineering work experience and a special topic in project management, where skills obtained are relevant to the workplace.
Entry Requirements
Year 12 or equivalent qualifications; or mature age entry (STAT); or TAFE/VET qualifications; or higher education transfers; or completion of a foundation studies program; prerequisites: SACE Stage 2 Specialist Mathematics, Mathematical Methods or Mathematical Studies; assumed knowledge: Stage 2 Physics
Study Pathways
Transfer is available to a four-year Bachelor of Engineering. The Bachelor of Engineering Science is available for students who have not successfully completed SACE Stage 2 Mathematics or Physics.
How does this course perform?
How do study fields for Bachelor of Engineering Technology at Flinders University perform?
Life after Study
Related Careers
Electrical or Electronics Engineering Technologist
Electrical or electronics engineering technologists apply engineering principles to the design, manufacture, installation, commissioning, operation and maintenance of electrical and/or electronic plants and equipment.
Mechanical Engineering Technologist
Mechanical engineering technologists design, inspect, manage and test technologies, systems and procedures in mining, manufacturing or processing industry plants.
Programmer (Information Technology)
Programmers (IT) write, test and maintain computer programmes to ensure that the computer application meets the needs of the users of the computer system.


text:
GSM Gateway / Sim Cards Software Required (Quescom Hardware)
This project received 12 bids from talented freelancers with an average bid price of $4342 USD.Get free quotes for a project like this
Skills Required
Project BudgetN/A
Total Bids12
Project Description
We have a GSM gateway (see details at: [url removed, login to view]) and a sim array box with 416 slots for sim cards to use for our own internal calling at the office however do not have the software or system setup so that our business VOIP lines can talk to the sim array and allow us to make calls from the sims that we add to the hardware.
Therefore we either need something some scratch of software like Quescomm have something that you may be able to use as a template.
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Back in the old days hardware manufacturers felt safe in the knowledge that no mere hardware hacker could attempt to recreate their inventions. From Sony to Philips to LG to Samsung, the consumer... read more
Featured Slideshow
10 Things You Didn't Know Your Web Browser Could Do Yet
Submitted by l33tdawg on Mon, 2013-03-25 05:45
Web browsers have been growing up over the past few years. Now that Internet Explorer 6's hold on the web has been broken, browsers have been implementing a variety of cool new features that websites are taking advantage of today.
This article focuses on new web technologies that you can use on actual web pages today. Sure, some of you have no doubt heard of many of these, but the majority of people haven't heard of all of them.
- 1679 reads


text:
You can appoint a guardian for your minor children in your will. Unless there is a significant reason not to, the court will honor your request. Once appointed, the guardian becomes legally responsible for the upbringing of your child or children.
In general, the law recognizes the biological parents of a child as the natural guardians. On the death of one parent, the surviving parent becomes the sole guardian. If the parents are divorced and the parent with custody dies, custody transfers to the surviving parent (unless the surviving parent has been deemed unfit).
Further,you can name a relative or a friend to be the guardian of your children. While you may name a married couple as co-guardians, you may want to name individuals as the legal guardians to avoid further difficulties should the couple separate.
It is usually easier to name the same person to be the guardian of your children and your property. It is less expensive and can alleviate a lot of problems before they arise.
If you do not want to name a property guardian, you can establish a trust that will hold the property until it is passed on to your children (when they are old enough).
Further, you can use the "Uniform Transfers to Minors Act" that will hold the property until your child or children turn 18. If you have more than one child, you'll need to set up separate accounts for each of your children.
There are many things to consider, both personal and legal, when choosing a guardian for your children. You should consider who will raise your children with the same values you have, and who would provide the best care and loving environment for your children. Additionally, you should consider practical issues such as:
Estate Plan Center: Appointing Guardianship
Child Guardianship: Appointing a Guardian
E-Zine Articles: Appointing a Guardian for Child Care
Child custody Guardianship and child custody Estates Guardianship planning Types of wills Living will Biological parents Guardianship and conservatorship
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University of Phoenix will co-host a veterans job fair
Any veterans looking for a job may have luck at the upcoming veterans job fair.
According to The Phoenix Business Journal, the University of Phoenix along with the U.S. Chamber of Commerce Foundation will host a job fair for veterans.
The event, titled "Hiring Our Heroes," will be the first of 11 fairs being hosted on University of Phoenix campuses all across the nation this spring.
"Hiring Our Heroes" will have workshops offering resume polishing, interview practice and one-on-one career planning, along with networking sessions that will feature more than 65 employers from various industries.
This event will take place Thursday, April 25 from 9 a.m. to 1 p.m. at the University of Phoenix campus, 1625 W. Fountainhead Parkway in Tempe.
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text:
Sam Allardyce confirms interest in Blackburn's Martin Olsson
Filed: Thursday, 10th January 2013
By: Staff Writer
Sam Allardyce has revealed that negotiations with Blackburn Rovers over defender Martin Olsson are continuing, despite the Championship club placing a £7million price tag on the Swedish defender.
It was revealed earlier this week that West Ham had bid around £2million for the 24-year-old, an offer that was immediately rejected by the Ewood Park-based club.
However Allardyce, speaking to the press this morning ahead of this weekend's trip to Sunderland, admitted that he was still interested in acquiring the services of the Swedish international.
"We have made an enquiry. Negotiations are ongoing at the moment," he said. "I think that if I was strengthening anywhere at the moment it would be in the left back position because of our injury problems in that area."
However Allardyce denied reports that he was looking to strengthen in other areas - such as in goal, a position with which Olsson's team mate at Blackburn, Paul Robison, has been heavily linked with. "We are only looking at that position at the minute," he said.
Related NewsAllardyce, Brady, Payet & Obiang: Wednesday's news [28th Sep 2016]
Allardyce 'deeply disappointed' by departure [27th Sep 2016]
Sam gone - after 67 days [27th Sep 2016]
Brady 'saddened' by Big Sam accusations [27th Sep 2016]
Allardyce faces fresh allegations [27th Sep 2016]
Slav - we have a major problem [17th Sep 2016]
West Bromwich Albion 4-2 West Ham Utd [17th Sep 2016]
Allardyce is a winner, says Kouyate [6th Sep 2016]
Payet, Adrian, Bilic & Cresswell: Tuesday's News [6th Sep 2016]
International round-up [5th Sep 2016]
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