 to record the servo bursts and other servo track information for that position. The process of precisely measured displacement and servo track writing is repeated to write all required servo tracks across the disk.
We could theoretically use the STW to calibrate the magnetoresistive read transducer by leaving the drive in the STW after recording the servo information. The calibration is possible because the STW provides us with the actual displacement from a reference position (i.e. a burst pair centerline where the PES=0). In general operation, the STW would move the HDA's actuator to a plurality of known off-center positions, and the HDA would read the servo signals at those positions and then associate the servo signals or resultant PES with actual displacement to develop a compensation table or formula.
Using the STW to perform the actual calibration, however, is undesirable for several reasons. First, an STW is a very expensive piece of machinery, costing $100,000.00 or more and therefore available in limited quantities. Increasing the time each HDA spends in the STW, therefore, adversely impacts production time and cost. Second, the STW undesirably consumes floor space. Finally, it is undesirable to calibrate the drive in the STW because the calibration must be performed prior to and independent of the detailed self calibration process which the disk drive performs later in the manufacturing cycle. This is a significant disadvantage because the parameters of the servo channel may change due to adjustments in DC bias current applied to the MR transducer or other factors. Accordingly, the calibrations made with the STW may become inaccurate or entirely invalid.
There remains a need, therefore, for a disk drive that can independently calibrate its read transducers after leaving the STW and without significantly reducing the disk drive's data storage capacity. The present invention is related to an apparatus and a method for the measurement of mass and/or moisture of dielectric objects.
With respect to the measurement of mass and/or moisture of dielectric objects, the present invention is based on the per se known microwave method, in which the object to be measured is put into a resonator. Due to its dielectric properties, the object changes an electromagnetic resonance impressed to the resonator. The mass and the moisture of the dielectric object is then determined from the change of the resonance curve and from the shift of the resonance frequency.
From EP 1 669 755 B1, the entire contents of which is incorporated herein by reference, a method for the measurement of the mass and/or moisture
to record the servo bursts and other servo racetrack data for that position. The process of precisely measure shift and servo track writing is repeated to publish all required servo tracks across the phonograph record. 
 We could theoretically use the STW to calibrate the magnetoresistive read transducer by leaving the driveway in the STW after recording the servo information. The calibration is potential because the STW provides us with the actual displacement from a reference position (i.e. a burst pair centerline where the PES=0). In general operation, the STW would travel the HDA's actuator to a plurality of known off - center position, and the HDA would read the servo signals at those positions and then associate the servo signal or resultant PES with actual displacement to develop a compensation table or formula. 
 use the STW to perform the actual calibration, however, is undesirable for several reasons. First, an STW is a very expensive piece of machinery, cost $ 100,000.00 or more and therefore available in limited quantities. Increasing the time each HDA spends in the STW, therefore, adversely impacts production time and monetary value. Second, the STW undesirably consumes floor space. last, it is undesirable to calibrate the campaign in the STW because the calibration must be performed prior to and independent of the detailed self calibration process which the phonograph record drive performs later in the manufacturing hertz. This is a significant disadvantage because the parameters of the servo channel may change due to adjustments in DC bias current apply to the MR transducer or other factors. Accordingly, the calibrations made with the STW may become inaccurate or entirely invalid. 
 There stay a need, therefore, for a disk drive that can independently calibrate its read transducers after leave the STW and without significantly reducing the disk campaign's data storage capacity. The present invention is related to an apparatus and a method acting for the measurement of mass and/or moisture of dielectric objects. 
 With respect to the measurement of mass and/or moisture of dielectric objects, the present invention is based on the per se known microwave method acting, in which the object to be measured is put into a resonator. Due to its dielectric properties, the aim changes an electromagnetic resonance impressed to the resonator. The bulk and the moisture of the dielectric object is then determined from the variety of the resonance curve and from the shift of the resonance frequency. 
 From EP 1 669 755 B1, the entire contents of which is incorporated herein by reference, a method for the measurement of the mass and/or moisture
 to record the servo bursts and other servo track inforjation fur that position. The process od prexisely measured displazement anf servo rracj writing is repeatcb to svite clo required seryo tracks awross the disk.
Fe cluld theoretically use the STW to cwlibratr hhe magnetoresystine reas transducer by leaving the drive jn the VTW after recprding the servo informatiln. Tje calibration is oossible bexausq the STW proxides us wpch the actuzl displacement from a referencd posntion (i.e. a vuest kair centerlmne whvre the PES=0). Ik generdl operstion, the STW eound nove the HDA's actuatoc to a plurality of hnown off-weuter positions, and thw YDA wmuld reaa thd strvp aignald av those posjtions and rhen associate the xewnp signals or resuleagt PES with actual displacement to devenop a compensation table oe formula.
Using the STA to perfjrm the actual calibration, however, is undesirable for advexql rexwojs. First, an STW is a very expensive piece of izcnikery, costing $100,000.00 or more and tnegegjre available in limitsd quantities. Incrfasing jhe tine each HQA slends in the STW, therefore, qdversely imiactw production time cnd cost. Secund, jhe STE undesirably consumes yloor apace. Finalpy, it is hvdesirable to cauibgate the drive in the STW becatse the celibrction murt bg perfowmed prior to akg independent of tje dejailed self calihration process which the disk vcive performs ldteg in the ianufscturing cyclq. This is a siynificanc disaavantage bvcause thx parameters of the servo fhannel may rhange duq to adjystmentr in DC bias cutrent applied to thw MR transducer or otfsr factors. Accoxbibgly, the calibrstiuns mwdx witr the STW may becume onaccjrate or enbirdly onvalid.
There remains a nsed, therefore, for s qisk drice that san independemtly calibrate its read trensducrrs after leaving the STW and witgout signlfigantly reducigg tme dysk drive's data storage capacity. The present inveition is related to an qpparatus and a metkoc for the mxasureient of mdss and/or moisture od dielectric objegts.
With respect to the measusemenh of mass and/or moisture of dielectric objects, the present invention is bqsed oi ehe per se inowm micgowcve methoq, in xhich the object no be measured is put into a resunator. Dge to its dielectric propertiex, ghe object chxnges an electromagnetic resonanve impressed to the resonator. Tne mass and the moisture of the eieledtric objert is then determinec from the xhange if tme resonance cjrvr wnd from hhe xhnft of the resonance frequency.
Fron EP 1 669 755 H1, the entire convents of whigh is ihcorpotated herein by rsfersjce, a method for tne measurement of the mass and/or mmifture
to record the servo bursts and other information that position. process of precisely writing repeated to write required servo tracks the disk. We could theoretically use STW to calibrate the magnetoresistive read transducer by leaving the drive in the after recording the servo information. The calibration is possible because the STW provides with actual from reference position (i.e. a burst pair centerline where the PES=0). In general operation, the STW would the HDA's actuator to a plurality of known positions, and the HDA read the servo signals at positions then associate servo or PES with actual to develop a compensation table or formula. Using the STW to perform the actual calibration, however, is for several an STW a expensive of machinery, costing more and therefore available in limited time each HDA spends in the STW, therefore, impacts production and cost. Second, the STW undesirably floor space. Finally, it is undesirable to calibrate drive in the STW because the calibration must be performed prior to and independent of self calibration process which disk drive performs in manufacturing This a significant because the parameters of the servo channel may change due to in DC bias current applied to the MR transducer or Accordingly, calibrations made with STW may become inaccurate entirely There remains a need, a drive calibrate read after leaving the STW without significantly reducing the disk data storage capacity. The an apparatus and a method for the measurement mass and/or moisture of dielectric objects. With to the measurement of mass and/or moisture of dielectric objects, the present is based per se known microwave method, in which the to be measured is into a resonator. Due to its dielectric properties, the changes electromagnetic resonance to the resonator. mass and the of the dielectric then determined the of and from the shift of the frequency. EP 1 669 755 B1, entire which is incorporated herein by reference, a method for the measurement of the mass and/or
 to record the servo bursts and Other servo Track InfOrmAtIon fOr thAt position. The pROcesS of precisely measured diSplacEmENt anD SeRvo trAck writINg IS RepEaTeD to WrITe All reQuiRed servO tracks acrOss ThE disk.
We could THeOretically Use The STW to caliBraTe the mAgNetOResisTivE read TransdUCer by lEaving the DrIVe in thE sTW afteR REcOrdiNg the servo informaTIoN. the calibration Is possIbLE bECAusE thE STW providEs Us witH The actuAL dISPLacEMent from a refeRence positiON (i.e. A burst PaIr cENterliNe wheRe THe PeS=0). In general OperAtion, the StW woulD Move the hdA's actuAtor to A plUraLity OF kNoWn oFf-CEntER pOsiTIonS, and the HdA WoUld reAd thE SERVo siGnaLs at Those Positions and tHen AssoCIatE the sErvo sIgnaLs Or resUltant pES wiTh Actual displacemEnt tO develop a ComPeNsaTiOn tabLE or forMulA.
UsIng the StW to perFOrm ThE ACTuAl calibration, howevEr, IS UnDesirablE for seVErAl REasons. FiRsT, an sTW iS A Very eXpenSIvE piece of MachinERy, CoSting $100,000.00 or MoRe and tHeRefOre AvailABle iN limitEd quantiTies. INCreasing the timE Each HDA spends IN tHE sTw, TherEfoRe, adversely ImpaCTs prOducTIoN tiME and cOst. SeCoND, tHE STW undesirably consUmEs flooR spacE. Finally, it is uNdesirable TO CAlibrate The dRIvE In the STW becausE the cAlibration MUst be perFormeD prior to And indepeNDEnt of the DetAilEd sElf CALiBration procesS WHich ThE disk drIve PerformS laTer In tHe mAnUfacturinG cycle. ThIs Is A sIgNifIcant DIsadvantAgE beCaUse The paRAmeterS of thE serVo ChANneL may chaNGe DUE to aDjUsTmenTs iN Dc bias CurrENt aPplied tO the MR traNsdUCer oR oThEr factoRs. Accordingly, ThE calibratiOnS maDe with THE STW may bEcome inaccurate or entireLY invaliD.
ThEre reMainS a need, theRefOre, for A diSK drive That caN indePeNdeNTLy calIBRaTe iTs Read transdUCErs After LeAvinG the STW And without significANtlY reducing the dIsk DrivE'S DaTa sTOrAGe cApACitY. tHe present inventIon is relatEd TO aN apparatus ANd a MeThod for The measUremeNT of mass And/or moisTure of dieLeCtriC OBjeCts.
With resPect to thE measuremENt of mASs And/or MoiSture oF dIelEctriC objecTS, thE presEnt invEnTion is Based On The per se Known microwave method, in wHich thE objeCt tO be measurEd iS Put Into a resoNatoR. Due to its dIelEctRic prOpeRTies, tHe obJEcT chANges aN eleCTromagnetIC rEsoNANcE impressed tO THE reSonatOr. THE mass aNd thE moisture of the dieLEctric object is Then DETerMinED froM tHe change of the rEsoNaNCE curve anD fRom the shift Of the resOnANce frEquencY.
From Ep 1 669 755 B1, the enTIRe COntentS of wHicH is incorpOraTeD Herein bY rEfERence, a MethOd For the MeasurEMent OF The mass and/or moisTure
 to record the servo burst s and othe r ser votra ck  inf orma tion for thatp osit ion. The process of pr ecise ly meas u re d dis placeme n ta n d s er vo  tr ac k  w ritin g i s repea ted to wri teal l required s e rv o tracks a cro ss the disk. 
We  could  t heo r etica lly  usethe ST W  to ca librate t he magnet o resisti v e  r eadtransducer by lea v in g  the drive inthe ST Wa ft e r  re cor ding the s er vo in f ormatio n .T h e  ca l ibration is p ossible bec a use  the S TW  pr o videsus wi th the  actual dis plac ement fro m a re f erencep osition  (i.e.  abur st p a ir  c ent er l ine wh ere the  PES=0).  I ngener al o p e r a tion , t he S TW wo uld move theHDA 's a c tua tor t o a p lura li ty of  known  off- ce nter positions,  and  the HDAwou ld  re ad  thes ervo s ign als  at tho se posi t ion sa n d  t hen associate these r v osignalsor res u lt an t  PES wit hact uald i splac emen t  t o develo p a co m pe ns ation t ab le orfo rmu la. 
Usin g  the  STW t o perfor m the actual calibra t ion, however, is u nd e sira ble  for severa l re a sons . Fi r st , a n  STWis ave r ye xpensive piece of m ac hinery , cos ting $100,000 .00 or mor e a nd there fore av a ilable in limi ted q uantities. Increasi ng th e time e ach HDA s p e nds in t heSTW , t her e f or e, adverselyi m pact sproduct ion  time a ndcos t.Sec on d, the ST W undesi ra bl yco nsu mes f l oor spac e.  Fi na lly , iti s unde sirab le t oca l ibr ate the dr i v e in  t he  STW  be ca use t he c a lib rationmust be p erf o rmed  p ri or to a nd independen tof the det ai led  selfc a libratio n process which the dis k  driveper forms  lat er in the  ma nufact uri n g cycl e. Thi s isasig n i fican t di sad va ntage beca u s e t he pa ra mete rs of t he servo channel m a y c hange due toadj ustm e n ts  in DC bia sc urr e n t applied to th e MR trans du c er  or otherf act or s. Acco rdingly , the calibra tions mad e with th eSTWm a y b ecome inac curate o r entirel y  inva l id .
The reremain sa n eed,theref o re,  fora disk  d rive t hat c an  indepen dently calibrate its re ad tra nsduc ers  after le avi n g t he STW an d wi thout sign ifi can tly r edu c ing t he d i sk  dr i ve'sdata storage c a pa cit y .  T he presenti n v ent ion i s r e latedto a n apparatus and a method for the  mea s u rem ent of m as s and/or moist ure  o f dielectr ic  objects.
W ith resp ec t  to t he mea sureme nt of m a s sa nd/ormois tur e of diel ect ri c  object s,  t h e pres entin ventio n is b a sedo n  the per se know n mic r o wavem eth od, i nwhich t h e ob ject to be  measured i s putinto  a re sonator .Due to  it sdielectric propertie s, th e objec tchan ges  an el ectr o m agnet ic r es ona nce impre s s ed to  t h e r eson ator.  T he m ass and t h e moistu reo f the d ie lec t r ic obj e ct i s then det erm inedf r om the cha n ge o f  t h e res onance  curve  and fr o m t he  shiftoft h e resonan ce freque n cy. 
F romEP 1 669  7 55 B 1,  th eentire contents  of whic h is inc o r porate d h e rein by ref er ence, a meth od fo rt he meas u r eme nt of t h e m ass  an d/or  mo istu r e
 to_record the_servo bursts and other_servo track_information_for that_position._The process of_precisely measured displacement_and servo track writing_is repeated to_write_all required servo tracks across the disk.
We could theoretically use the STW to calibrate_the_magnetoresistive read_transducer_by_leaving the drive in the_STW after recording the servo_information. The_calibration is possible because the STW provides us_with_the actual displacement_from a reference position (i.e. a burst pair centerline_where the PES=0). In general operation,_the STW would_move_the_HDA's actuator to a_plurality of known off-center positions, and_the HDA would read the servo_signals at those positions and then associate_the servo signals or resultant PES_with actual displacement to develop_a compensation_table or formula.
Using the STW_to perform the_actual calibration,_however, is undesirable_for several reasons. First, an STW_is a very_expensive piece of machinery, costing $100,000.00_or_more and therefore_available_in_limited quantities._Increasing the time_each_HDA spends_in_the STW, therefore, adversely impacts production_time_and cost. Second, the STW undesirably consumes_floor space. Finally, it_is_undesirable to calibrate the_drive in the STW because_the calibration must be performed prior_to and_independent of_the detailed self calibration process which the disk drive performs later_in the manufacturing cycle. This is_a significant disadvantage because_the parameters_of_the servo channel_may_change due_to adjustments in DC bias current applied_to the_MR transducer or other factors. Accordingly,_the calibrations made with_the_STW may become inaccurate or entirely_invalid.
There remains a need, therefore, for_a disk drive that can_independently_calibrate_its read transducers after leaving_the STW and without significantly reducing_the disk drive's_data storage capacity. The present invention is_related_to an apparatus and a method_for_the measurement of mass and/or moisture_of_dielectric_objects.
With respect to the measurement_of mass and/or moisture of dielectric_objects, the present invention is based on the per_se known microwave_method, in which the object_to_be_measured is put into a resonator. Due to its dielectric_properties, the_object changes an_electromagnetic resonance impressed to the resonator. The mass and the_moisture of the dielectric object is then_determined from the change of the resonance curve and from the_shift of the resonance frequency.
From EP 1 669_755 B1, the entire contents of which_is incorporated herein by_reference,_a method for the measurement of the_mass_and/or_moisture