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51.010-1
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9 Repeat steps 2 to 8 four times
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**) only if the requested rate in the DCS differs from the existing radio channel rate (when the radio channel rate equals 9 600 kbit/s and the DCS requests 7 200 kbit/s no CMM will be executed)
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51.010-1
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29.4.3.6.5 Test requirements
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1. The MT shall send the CMM ACK message.
2. For 7,2/9,6 kBit/s:
The correct up- and down-conversion shall be verified (4 STATUS frames for 1 BCS octet)
For 4,8 kBit/s:
The correct up- and down-conversion shall be verified (2 STATUS frames for 1 BCS octet)
For 2,4 kBit/s:
The correct up- and down-conversion shall be verified (1 STATUS frame for 1 BCS octet)
The IDENT octet shall be set to BCS-REC in case of the up-conversion.
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51.010-1
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29.4.3.7 Quality Check
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51.010-1
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29.4.3.7.1 Definition
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-
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51.010-1
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29.4.3.7.2 Conformance requirement
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The configuration supporting transparent facsimile group 3 shall decode the T.4 coding and shall generate a document.
Reference
3GPP TS 03.45, ITU-T Recommendation T.21, ITU-T Recommendation T.4.
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51.010-1
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29.4.3.7.3 Test purpose
|
To verify the quality of the received document.
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51.010-1
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29.4.3.7.4 Method of test
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Initial conditions
The document has been received at the called side.
Test procedure
The quality of the document at the receiving side shall be checked.
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51.010-1
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29.4.3.7.5 Test requirements
|
The contents of the transmitted and the received document shall be the same.
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51.010-1
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29.4.4 Notes
|
The following notes apply throughout the subclause 29.4.
NOTE 1: By pressing the START button on the facsimile apparatus or in case of PC fax by selecting the appropriate software menu point or automatically.
NOTE 2: Or equivalent function/means having the same result.
NOTE 3: Tested by monitoring the contents of the STATUS frame ident octet identifier.
NOTE 4: If no access is available to the 2w interface, this requirement cannot always be verified.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30 Speech teleservices
|
When an artificial ear is required, the ITU‑T Recommendation P.57 [108] Type 1 artificial ear may be used for up to release 4 handsets. See below for details.
If requested by the terminal supplier, the ITU‑T Recommendation P.57 [108] Type 3.2 artificial ear shall be used. In this case the following shall apply:
- either the low leakage option or the high leakage option of Type 3.2 artificial ear may be adopted;
- the force against the ear shall be as specified in ITU‑T Recommendation P.57 [108];
- sound pressure measurements shall be referred to the ERP as specified in ITU‑T Recommendation P.57 [108] or DRP according to the Terminal Supplier's request;
- no leakage correction shall be made in the calculation of RLR (i.e. LE=0).
If requested by the terminal supplier, the ITU‑T Recommendation P.57 [108] Type 3.4 artificial ear may be used for Release 9 6 MS or later. The positioning is defined in ITU-T Recommendation P.64.
If requested by the terminal supplier, the ITU‑T Recommendation P.57 [108] Type 3.3 artificial ear may be used for Release 9 6 MS or later. The positioning is defined in ITU-T Recommendation P.64.
Note that for measurement of STMR in release 4 or later MS as specified in 3GPP TS 26.132, the 3.2 ear with the low leakage option, or 3.3 ear or 3.4 ear shall be used. For release 4 it is also possible to use the type 1 ear.
The manufacturer declares in the IXIT statement which type of artificial ear will be used for teleservices speech testings.
The manufacturer declares in PICS TSPC_MS_AUDIO_RELEASE the acoustic implementation according to a given release. For release 4 or later MS the MS shall be tested against the latest version of the corresponding release of 3GPP TS 26.131 and 3GPP TS 26.132 if a reference to these specifications is indicated in the Test Case.
NOTE 1: An MS may be either a handset MS, a hands free MS or a combined handset and hands free MS. The test description for hands free operation, however, at the moment only covers the stability margin as no test method could be defined for the other parameter.
NOTE 2: Frequency settings in the following tests are taken from ISO 3, R10 series or R40 series or from table 2 of ITU-T Recommendation P.79. A departure from the nominal frequencies of +5 % below 240 Hz and +2 % at 240 Hz and above is accepted. Any sub-multiple of the sampling frequency of 8 kHz shall be avoided. In the case of 4 kHz the departure is restricted to -2 %.
NOTE 3: The measurement accuracy for signal level is ±0,2 dB and for sound pressure ±0,6 dB.
NOTE 4: The digital test signals shall be generated as 8 bit A-law companded PCM signals, which internally in the SS are expanded according to ITU-T Recommendation G.721 (Law=1) to 13 bit linear before being applied to the MS via the DAI.
NOTE 5: When measuring signal levels on the DAI, a digital measuring instrument is connected to the 64 kbit/s output of the A-law compression equipment in the SS, which is in turn connected to the DAI in the MS.
NOTE 6: Measurements shall be possible with and without psophometric weighting according to ITU-T Recommendation G.223, table 4.
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51.010-1
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30.1 Sending sensitivity/frequency response
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.1.1 Definition
|
The sending sensitivity frequency response is, as a function of the input test signal frequency, the ratio expressed in dB between the output level at the Digital Audio Interface (DAI) or at the audio output of the reference speech decoder of the SS and the input sound pressure in the artificial mouth required to obtain this.
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51.010-1
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30.1.2 Conformance requirement
|
The sending sensitivity frequency response shall be within the mask given in 3GPP TS 03.50.
3GPP TS 03.50; subclause 3.8.1.1, table 1.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.1.3 Test purpose
|
To verify that the sending sensitivity frequency response is within the mask given in 3GPP TS 03.50, subclause 3.8.1.1, table 1.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.1.4 Method of test
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51.010-1
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30.1.4.1 Initial conditions
|
When measured at the DAI:
a) The handset is mounted in the LRGP (see annex A of ITU-T Recommendation P.76). The earpiece is sealed to the knife-edge of the artificial ear.
b) A pure tone with a sound pressure of -4,7 dBPa (in accordance with ITU-T Recommendation P.64) is applied at the mouth reference point (MRP) as described in ITU-T Recommendation P.64 using an artificial mouth conforming to ITU-T Recommendation P.51.
c) A digital measuring instrument, or high quality digital decoder followed by an analogue level measuring set, is connected to the Digital Audio Interface (DAI). The DAI is set to the operating mode "Test of acoustic devices and A/D & D/A".
When measured at the output of the reference speech decoder of the SS:
a) The handset is mounted in the LRGP and the earpiece is sealed to the knife-edge of an artificial ear.
b) A full rate speech call is set up between the MS and the SS.
c) Artificial speech conforming to ITU‑T Recommendation P.50, shall be applied to the MRP, at a wideband sound pressure level of -4,7 dBPa. This implementation could be a real time algorithm producing the artificial speech or a pre‑recorded tape of the artificial speech.
d) The artificial speech shall comprise of a concatenation of three 10 s intervals of "male" and "female" voice. The first 10 s interval is not used for measurement purposes but allows any noise/echo cancelling devices in the MS to adapt. The second and third 10 s intervals consist of separately "male" and "female" artificial voice.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.1.4.2 Procedure
|
When measured at the DAI:
The SS measures the output level represented by the PCM bit stream at the DAI (pin 23) at one-twelfth-octave intervals as given by the R40 series of preferred numbers in ISO 3 for frequencies from 100 Hz to 4 000 Hz inclusive.
When measured at the output of the reference speech decoder of the SS:
The 1/3 octave filtered long‑term average spectrum of the signal is measured at the analogue or digital output of the reference speech decoder of the SS and an average for the "male" and "female" voices is obtained. The sending sensitivity/frequency response is calculated as the difference between the 1/3 octave input power and the 1/3 octave output power.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.1.5 Test requirement
|
The sending sensitivity/frequency response shall be within a mask given in table 30.1. The mask can be drawn with straight lines between the breaking points in the table on a logarithmic (frequency) vs linear (dB sensitivity) scale.
All sensitivity levels are dB on an arbitrary scale.
Table 30.1
Frequency (Hz)
Upper Limit (dB)
Lower Limit (dB)
100
‑12
200
0
300
0
‑12
1 000
0
‑6
2 000
4
‑6
3 000
4
‑6
3 400
4
‑9
4 000
0
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
|
30.2 Sending loudness rating
| |
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.2.1 Definition
|
The Sending Loudness Rating (SLR) is a means of expressing the sending frequency response based on objective measurements in a way which relates to how a speech signal would be perceived by a listener.
|
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.2.2 Conformance requirement
|
The Sending Loudness Rating (SLR) shall be 8 ± 3 dB.
3GPP TS 03.50; subclause 3.1.1.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.2.3 Test Purpose
|
To verify that the Sending Loudness Rating (SLR) is 8 ± 3 dB.
|
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.2.4 Method of test
| |
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.2.4.1 Initial conditions
|
When measured at the DAI:
- The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A".
When measured at the output of the reference speech decoder of the SS:
- A full rate speech call is set up between the MS and the SS.
|
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.2.4.2 Procedure
|
When measured at the DAI:
a) The sending sensitivity is measured at each of the 14 frequencies given in table 2 of ITU-T P.79, bands 4 to 17.
b) The sensitivity is expressed in terms of dBV/Pa and the SLR is calculated according to ITU-T Recommendation P.79 formula 4.19 b of ITU-T Recommendation P.79, over bands 4 to 17, using the sending weighting factors from ITU-T Recommendation P.79 table 2, adjusted according to table 3 of ITU-T Recommendation P.79.
When measured at the output of the reference speech decoder of the SS:
a) The sending sensitivity from the MRP to the analogue or digital output of the reference speech decoder of the SS is determined according to subclauses 30.1.4.1 and 30.1.4.2.
b) The sensitivity is expressed in terms of dBV/Pa and the SLR shall be calculated according to ITU‑T Recommendation P.79 formula 2.1, over bands 4 to 17, and using m = 0,175 and the sending weighting factors from ITU‑T Recommendation P.79 table 1.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.2.5 Test requirement
|
The SLR shall be 8 ± 3 dB.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.3 Receiving sensitivity/frequency response
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.3.1 Definition
|
The receiving sensitivity frequency response is, as a function of the input test signal frequency, the ratio expressed in dB between the output sound pressure in the artificial ear and the input level, represented by the PCM bit stream at the Digital Audio Interface (DAI) or the level at the SS audio input, required to obtain this.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.3.2 Conformance requirement
|
The receiving sensitivity frequency response shall be within the mask given in 3GPP TS 03.50.
3GPP TS 03.50; subclause 3.8.1.2, table 2.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.3.3 Test purpose
|
To verify that the receiving sensitivity frequency response is within the mask given in 3GPP TS 03.50; subclause 3.8.1.2, table 2.
|
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.3.4 Method of test
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.3.4.1 Initial conditions
|
When measured from the DAI:
a) The handset is mounted in the LRGP and the earpiece is sealed to the knife-edge of the artificial ear.
b) A digital signal generator is connected at the digital interface delivering a signal equivalent to a pure tone level of ‑16 dBm0, see ITU-T Recommendation P.64.
c) The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A".
When measured from the input of the reference speech encoder of the SS:
a) The handset is mounted in the LRGP and the earpiece is sealed to the knife-edge of the artificial ear.
b) A full rate speech call is set up between the MS and the SS.
c) Artificial speech conforming to ITU‑T Recommendation P.50, shall be applied to the analogue or digital input of the reference speech encoder of the SS, at a wideband level of -16 dBm0. This implementation could be a real time algorithm producing the artificial speech or a pre‑recorded tape of the artificial speech.
d) The artificial speech shall comprise of a concatenation of three 10 s intervals of "male" and "female" voice. The first 10 s interval is not used for measurement purposes but allows any echo cancellation devices in the MS to adapt. The second and third 10 s intervals consist of separately "male" and "female" artificial voice.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.3.4.2 Procedure
|
When measured from the DAI:
- Measurements are made at one twelfth-octave intervals as given in the R.40 series of preferred numbers in ISO 3 for frequencies from 100 Hz to 4 kHz inclusive. At each frequency, the sound pressure in the artificial ear is measured by connecting a suitable measuring set to the artificial ear.
When measured from the input of the reference speech encoder of the SS:
- The 1/3 octave filtered long‑term average spectrum of the signal is measured and an average for the "male" and "female" voices is obtained. The receiving sensitivity/frequency response is calculated as the difference between the 1/3 octave input power and the 1/3 octave output power.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.3.5 Test requirement
|
The receiving sensitivity/frequency response shall be within the mask given by table 30.2. The mask can be drawn with straight lines between the breaking points in the following table on a logarithmic (frequency) vs linear (dB sensitivity) scale.
All sensitivity levels are dB on an arbitrary scale.
Table 30.2
Frequency (Hz)
Upper Limit (dB)
Lower Limit (dB)
100
‑12
200
0
300
2
‑7
500
see note
‑5
1 000
0
‑5
3 000
2
‑5
3 400
2
‑10
4 000
2
NOTE: The limit at intermediate frequencies lies on a straight line drawn between the given values on a log (frequency) vs linear (dB) scale.
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51.010-1
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30.4 Receiving loudness rating
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.4.1 Definition
|
The Receiving Loudness Rating (RLR) is a means of expressing the receiving frequency response based on objective measurements in a way which relates to how a speech signal would be perceived by a listener.
|
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51.010-1
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30.4.2 Conformance requirement
|
1) The nominal Receiving Loudness Rating (RLR) shall be 2 ± 3 dB.
If a user controlled receive volume control is provided the equipment shall meet this nominal value for at least one setting of the control.
3GPP TS 03.50; subclause 3.1.1.
2) If a user controlled receive volume control is provided the Receive Loudness Rating (RLR) shall not be less than ‑13 dB when the control is set to maximum.
3GPP TS 03.50; subclause 3.1.1.
|
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.4.3 Test purpose
|
1) To verify that the nominal Receiving Loudness Rating (RLR) is 2 ± 3 dB.
2) To verify that if a user controlled receive volume control is provided the Receive Loudness Rating (RLR) is not less than ‑13 dB when the control is set to maximum.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.4.4 Method of test
| |
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
|
30.4.4.1 Initial conditions
|
When measured at the DAI:
- The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A".
When measured at the output of the reference speech decoder of the SS:
- A full rate speech call is set up between the MS and the SS.
|
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
|
30.4.4.2 Procedure
|
When measured at the DAI:
a) The receiving sensitivity is measured at each of the 14 frequencies listed in table 2 of ITU-T Recommendation P.79, bands 4 to 17.
b) The sensitivity is expressed in terms of dBPa/V and the RLR is calculated according to ITU-T Recommendation P.79 formula 4.19 c, over bands 4 to 17, using the receiving weighting factors from table 2 of ITU-T Recommendation P.79, adjusted according to table 3 of ITU-T Recommendation P.79.
c) The artificial ear sensitivity must be corrected according to the real ear correction of table 4 of ITU-T Recommendation P.79.
NOTE: The values of real ear correction in ITU-T Recommendation P.79 table 4 were derived for one type of handset conforming to the shape defined in ITU-T Recommendation P.35.
These values are used in the present document because there is no measurement method agreed for the real ear correction. If a method of measurement is agreed, it is intended to change the present document to use the values appropriate to each handset.
When measured from the input of the reference speech encoder of the SS:
a) The receiving sensitivity from the analogue or digital input of the reference speech encoder of the SS to the output of the artificial ear is determined according to subclauses 30.3.4.1 and 30.3.4.2.
b) The sensitivity is expressed in terms of dBPa/V and the RLR shall be calculated according to ITU‑T Recommendation P.79 formula 2.1, over bands 4 to 17, using m = 0,175 and the receiving weighting factors from table 1 of ITU‑T Recommendation P.79.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.4.5 Test requirement
|
If no user controlled receive volume control is provided, the RLR shall be 2 ± 3 dB.
If a user controlled receive volume control is provided, the RLR shall meet this nominal value for (at least) one setting of the receive volume control.
When the receive volume control is set to maximum the RLR shall not be less than (i.e. louder than) ‑13 dB.
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51.010-1
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30.5 Side tones
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.5.1 Side Tone Masking Rating (STMR)
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.5.1.1 Definition
|
The sidetone loudness ratings are a means of expressing the path loss from the artificial mouth to the artificial ear based on objective single tone measurements in a way that relates to how a speaker will perceive his own voice when speaking (talker sidetone, expressed by the sidetone masking rating - STMR), or how a listener will perceive the background noise picked up by the microphone (listener sidetone rating - LSTR).
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51.010-1
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30.5.1.2 Conformance requirement
|
The nominal value of the Side Tone Masking Rating (STMR) shall be 13 ± 5 dB. Where a user controlled receiving volume control is provided the STMR shall meet the requirement at the setting where the RLR is equal to the nominal value.
3GPP TS 03.50; subclause 3.10.1.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.5.1.3 Test purpose
|
1) To verify that the Side Tone Masking Rating (STMR) is 13 ± 5 dB.
2) To verify that is a user controlled receiving volume control is provided, the STMR is 13 ± 5 dB at the setting where the RLR is equal to the nominal value.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.5.1.4 Method of test
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
|
30.5.1.4.1 Initial conditions
|
a) The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A".
b) The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
|
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.5.1.4.2 Procedure
|
a) The SS sends a PCM bit stream coded with the value No 1 over the DAI (pin 25). Or alternatively the activation of the A/D and D/A converters is performed via a call setup, in which case the DAI connection between the MS and SS, and the PCM bit stream are optional.
NOTE: The idle channel noise in the receiving direction is the acoustic sound pressure in the artificial ear when the digital input signal at the DAI is the PCM coded value No. 1.
b) The SS applies a pure tone with a sound pressure of ‑4,7 dBPa at the mouth reference point as described in ITU-T P.64 using an artificial mouth conforming to ITU-T Recommendation P 51.
c) For each frequency given in table 2 of ITU-T Recommendation P.79, bands 4 to 17, the sound pressure in the artificial ear is measured.
d) The sidetone path loss (LmeST) is expressed in dB and the STMR (in dB) is calculated from the formula 8.4 of ITU-T Recommendation P.79, using the weighting factors of column (3) in table 6 of ITU-T Recommendation P.79 (unsealed), and values of LE in accordance with table 4 of ITU-T Recommendation P.79.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.5.1.5 Test requirement
|
The STMR shall be 13 ± 5 dB.
Where a user controlled receive volume control is provided, the STMR shall meet the requirement given above at the setting where the RLR is equal to the nominal value.
|
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
|
30.5.2 Listener Side Tone Rating (LSTR)
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
|
30.5.2.1 Definition
|
The Listener Sidetone Rating (LSTR) is considered a major parameter affecting the user perception of the system.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
|
30.5.2.2 Conformance requirement
|
The value of the Listener Sidetone Rating (LSTR) shall not be less than 15 dB.
3GPP TS 03.50, subclause 3.10.1.
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683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
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30.5.2.3 Test purpose
|
To verify that the value of LSTR is not less than 15 dB.
|
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
|
30.5.2.4 Method of test
| |
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
|
30.5.2.4.1 Initial conditions
|
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A".
The SS sends a PCM bit stream coded with the value No. 1 over the DAI (pin 25) to the MS.
|
683b5b8a98f7b1390ddd5516ea9247a2
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51.010-1
|
30.5.2.4.2 Procedure
|
a) The sound field is calibrated in the absence of any local obstacles. The averaged field shall be uniform to within +4 dB/‑2 dB within a radius of 0,15 m of the MRP, when measured in one-third octave bands from 100 Hz to 8 kHz (bands 1 to 20).
b) A calibrated half-inch microphone is mounted at MRP. The sound field is measured in one-third octave bands. The spectrum shall be "Pink noise" as described in ITU-T recommendation P.64 annex B to within ±1 dB and the level shall be adjusted to 70 dBA (-24 dBPa(A)). The tolerance on this level is ±1 dB.
c) The artificial mouth and ear are placed in the correct position relative to MRP, the handset is mounted at LRGP and the earpiece is sealed to the knife-edge of the artificial ear.
d) Measurements are made in one-third octave bands for the 14 bands centred at 200 Hz to 4 kHz (bands 4 to 17). For each band the sound pressure in the artificial ear shall be measured by connecting a suitable measuring set to the artificial ear.
e) The listener sidetone path loss is expressed in dB and the LSTR shall be calculated from the ITU-T Recommendation P.79 formula 8‑4, using the weighting factors in column (3) in table 6 of the Recommendation, and the values of LE; in accordance with table 4 of the Recommendation.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.5.2.5 Test requirement
|
The LSTR shall not be less than 15 dB.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6 Telephone Acoustic coupling Loss (TAL)
| |
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.1 Echo Loss (EL)
| |
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.1.1 Definition
|
The echo loss is the path loss from the input of the reference speech encoder of the SS to the output of the reference speech decoder of the SS.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.1.2 Conformance requirement
|
The echo loss from the input to the output of the reference speech codec in the SS shall be at least 46 dB.
3GPP TS 03.50; subclause 3.4.3.2.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.1.3 Test purpose
|
To verify that the echo loss from the input to the output of the reference speech codec in the SS is at least 46 dB.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.1.4 Method of test
| |
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.1.4.1 Initial conditions
|
The DAI of the MS is connected to the SS and is set to the operating mode "Normal operation".
The SS sets up a speech call according to the generic call set up procedure.
The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
Where a user controlled volume control is provided it is set to maximum.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.1.4.2 Procedure
|
An implementation of the ITU-T P.50 artificial speech is connected to the analogue or digital input of the reference speech encoder of the SS. This implementation is either a real time algorithm producing the artificial speech or a pre-recorded tape of artificial speech. Both "male" and "female" artificial speech is required.
A ten second segment of the "male" artificial speech is applied to the analogue or digital input of the reference speech encoder of the SS. The third octave power of the input signal is measured. The echo loss signal is not measured at this stage as the first ten second segment is used to allow any acoustic echo cancellation devices within the MS to adapt to the echo path.
Immediately after a second ten second segment of the "male" artificial speech is applied to the analogue or digital input of the reference speech encoder of the SS. The third octave power of the echo signal is measured at the analogue or digital output of the reference speech decoder of the SS.
The difference between the third octave input power and the third octave output power is entered into the ITU-T G.122 TCL algorithm and the acoustic echo loss calculated.
The test is repeated with the "female" artificial speech and the results of both "male" and "female" averaged to give the final result.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.1.5 Test requirement
|
The echo loss from the input to the output of the reference speech codec in the SS shall be at least 46 dB.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.2 Stability margin
| |
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.2.1 Definition
|
The receive-transmit stability margin is a measure of the gain that would have to be inserted between the go and return paths of the reference speech coder in the SS for oscillation to occur.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.2.2 Conformance requirement
|
The stability margin shall be at least 6 dB.
3GPP TS 03.50; subclause 3.2.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.2.3 Test purpose
|
To verify that the stability margin is at least 6 dB.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.2.4 Method of test
| |
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.2.4.1 Initial conditions
|
For handset operation the handset is placed on a hard plane surface with the transducers facing the surface.
For hands free operation the test setup is shown in ITU-T Recommendation P.34 (figure 3), but omitting the test table.
Where a user controlled volume control is provided it is set to maximum.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.2.4.2 Procedure
|
a) A gain equivalent to the minimum stability margin is inserted in the loop between the go and return paths of the reference speech coder in the SS and any acoustic echo control is enabled.
b) A test signal according to ITU-T Recommendation O.131 is injected into the loop at the analogue or digital input of the reference speech codec of the SS and the stability is measured. The test signal has a level of ‑10 dBm0 and a duration of 1 s.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.6.2.5 Test requirement
|
The minimum stability margin shall be 6 dB and no audible oscillation shall be detected.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7 Distortion
| |
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.1 Sending
| |
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.1.1 Definition
|
The transmit signal to total distortion ratio is a measure of the linearity of the transmitter equipment.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.1.2 Conformance requirement
|
The ratio of signal to total distortion power in the sending direction measured with a psophometric filter at the DAI of the MS or at the output of the reference speech decoder of the SS shall be above the limits given in 3GPP TS 03.50; subclause 3.9.1, table 3, unless the sound pressure at MRP exceeds +10 dBPa.
3GPP TS 03.50; subclause 3.9.1.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.1.3 Test purpose
|
To verify that the ratio of signal to total distortion power in the sending direction measured with psophometric filter is above the limits given in 3GPP TS 03.50;subclause 3.9.1, table 3.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.1.4 Method of test
| |
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.1.4.1 Initial conditions
|
The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
When measured at the DAI:
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A".
When measured at the output of the reference speech decoder of the SS:
A full rate speech call is set up between the MS and the SS.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.1.4.2 Procedure
|
a) A sine-wave signal with a frequency in the range 1 004 Hz to 1 025 Hz is applied to the MRP. The level of this signal is adjusted until the level at the DAI output (pin 23) of the MS or at the analogue or digital output of the reference speech decoder of the SS corresponds to ‑10 dBm0. The level of the signal at the MRP is then the acoustic reference level (ARL).
b) The test signal is applied at the following levels: ‑35 dB, ‑30 dB, ‑25 dB, ‑20 dB, ‑15 dB, ‑10 dB, ‑5 dB, 0 dB, 5 dB, 10 dB relative to the ARL.
c) The ratio of signal to total distortion power is measured at the DAI of the MS or at the analogue or digital output of the reference speech decoder of the SS with the psophometric noise weighting (see ITU-T Recommendations G.714 and O.132) at each signal level.
NOTE: The measurement is not to be carried out at sound pressures exceeding +10 dBPa.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.1.5 Test requirement
|
The ratio of signal to total distortion power measured with the psophometric noise weighting (see table 4/ ITU-T G.223) shall be above the limits given in table 30.3.
Table 30.3
dB relative to ARL
Level ratio
‑35 dB
17,5 dB
‑30 dB
22,5 dB
‑20 dB
30,7 dB
‑10 dB
33,3 dB
0 dB
33,7 dB
7 dB
31,7 dB
10 dB
25,5 dB
Limits for the signal to total distortion ratio (sending) when using the sine wave method.
Limits for intermediate levels are found by drawing a straight line between breaking points in a linear (dB signal level) vs linear (dB ratio) scale.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.2 Receiving
| |
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.2.1 Definition
|
The receive signal to total distortion ratio is a measure of the linearity in the receive equipment (excluding the speech decoder).
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.2.2 Conformance requirement
|
The ratio of signal to total distortion power in the receiving direction measured at the ERP or DRP according to the Terminal Supplier's request with psophometric filter shall be above the limits given in 3GPP TS 03.50; subclause 3.9.2, table 5.
3GPP TS 03.50; subclause 3.9.2.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.2.3 Test purpose
|
To verify that the ratio of signal to total distortion power in the receiving direction measured at the ERP or DRP according to the Terminal Supplier's request with psophometric filter is above the limits given in 3GPP TS 03.50; subclause 3.9.2, table 5.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.2.4 Method of test
| |
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.2.4.1 Initial conditions
|
The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A".
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.2.4.2 Procedure
|
a) The SS sends, via the DAI (Pin 25), a PCM bit stream simulating a sine-wave signal with a frequency in the range 1 004 Hz to 1 025 Hz corresponding to ITU-T O.132 at the following levels: ‑45 dBm0, ‑40 dBm0, ‑35 dBm0, ‑30 dBm0, ‑25 dBm0, ‑20 dBm0, ‑15 dBm0, ‑10 dBm0, ‑5 dBm0, 0 dBm0.
b) The ratio of signal to total distortion power is measured with the psophometric noise weighting in the artificial ear (see ITU-T Recommendations G.714 and O.132) at each signal level.
c) The measurement is only carried out at sound pressures between ‑50 dBPa and +10 dBPa.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.7.2.5 Test requirement
|
The ratio of signal to total distortion power measured at the artificial ear with the psophometric noise weighting (see table 4/ ITU-T Recommendation G.223) shall be above the limits given in table 30.4.
Table 30.4
Level at the digital audio interface
Level ratio
‑45 dBm0
17,5 dB
‑40 dBm0
22,5 dB
‑30 dBm0
30,5 dB
‑20 dBm0
33,0 dB
‑10 dBm0
33,5 dB
‑3 dBm0
31,2 dB
0 dBm0
25,5 dB
Limits for the signal to total distortion ratio (receiving) when using the sine wave method.
Limits for intermediate levels are found by drawing a straight line between breaking points in a linear (dB signal level) vs linear (dB ratio) scale.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.8 Sidetone distortion
| |
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.8.1 Definition
|
The sidetone distortion expresses the linearity of the sidetone path in the handset.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.8.2 Conformance requirement
|
The third harmonic distortion of the sidetone shall not be greater than 10 %.
3GPP TS 03.50; subclause 3.10.2.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.8.3 Test purpose
|
To verify that the third harmonic distortion of the sidetone is not greater than 10 %.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.8.4 Method of test
| |
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.8.4.1 Initial conditions
|
The DAI of the MS is connected to the SS and is set to the operating mode "Test of acoustic devices and A/D & D/A".
The handset is mounted in the LRGP (see annex 1 of ITU-T Recommendation P.76) and the earpiece is sealed to the knife-edge of the artificial ear conforming to ITU-T Recommendation P.51.
|
683b5b8a98f7b1390ddd5516ea9247a2
|
51.010-1
|
30.8.4.2 Procedure
|
a) The SS sends the PCM bit stream coded with the value No 1 over the DAI (pin 25) to the MS.
b) An instrument capable of measuring the third harmonic distortion of signals with fundamental frequencies in the range 315 Hz to 1 000 Hz is connected to the artificial ear.
c) A pure-tone signal of ‑4,7 dBPa is applied at the mouth reference point at frequencies of 315 Hz, 500 Hz, and 1 000 Hz. For each frequency the third harmonic distortion is measured in the artificial ear.
|
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