iDEN功能測(cè)試

1、修訂記錄revision history編制人author日期date修訂內(nèi)容change description版本號(hào)rev批準(zhǔn)approvals職位position姓名name簽名signature日期date1.目的：purpose:the purpose of this document is to detail the specific steps necessary for a lab technician to perform the iden parametric test.本文檔詳細(xì)描述了實(shí)驗(yàn)室技術(shù)員如何完成iden系統(tǒng)參數(shù)測(cè)試所需要的詳細(xì)測(cè)試步驟2 范圍：scope:the

2、 scope of this document is to instruct the lab technician on how to perform iden parametric testing for products run on the motorola alt flow 00r89144w01 using manual method instead of ate.本文檔規(guī)范了本實(shí)驗(yàn)室技術(shù)員遵照摩托羅拉生命加速測(cè)試流程(00r89144w01 )標(biāo)準(zhǔn)，通過(guò)手動(dòng)方法進(jìn)行iden系統(tǒng)參數(shù)測(cè)試，從而取代自動(dòng)化測(cè)試機(jī)測(cè)試。3 職責(zé)：responsibility:it is the respo

3、nsibility of lab technician to ensure proper usage of the equipment during testing. it is the responsibility of lab technician to ensure that the proper test setting is used prior to use of the equipment.實(shí)驗(yàn)室技術(shù)人員負(fù)責(zé)在實(shí)驗(yàn)過(guò)程中，確保儀器設(shè)備工作在正常狀態(tài)并確保在儀器設(shè)備使用前將儀器設(shè)備進(jìn)行正確的設(shè)置。4 定義：definition:termdefinitionateautomated

4、test equipment自動(dòng)測(cè)試儀altaccelerated life test生命加速試驗(yàn)idenintegrated digital enhanced network集成數(shù)字增強(qiáng)型網(wǎng)絡(luò)5 程序：procedure:5.1主要設(shè)備:agilent vector signal analyzer n9010aagilent rf power meter e4418bagilent vector signal generator e4438cagilent power supply 66319bwilltek rf shield box and antennalaboratory pc安捷倫

5、無(wú)線電信號(hào)分析儀n9010a安捷倫射頻功率計(jì) e4418b安捷倫無(wú)線電信號(hào)發(fā)生器e4438c安捷倫直流電源 66319bwilltek射頻屏蔽盒與天線工業(yè)控制電腦5.2 test setuprefer to diagram to set up the iden parametric test equipment. the gpib cable is meant for automation. the gpib cable to the e4438c is needed for one time loading of iden and mototalk waveforms to the equi

6、pment. all equipment should be turned on one hour before any test is done. this is to allow the equipment to stabilize sufficiently enough to make the correct measurement,以下是iden參數(shù)測(cè)試的連接圖。gpib電纜是用來(lái)進(jìn)行自動(dòng)化測(cè)試。第一次連接e4438c時(shí)需要用到gpib電纜進(jìn)行波形下載。所有儀器在測(cè)試前至少開(kāi)機(jī)一小時(shí)以保證各項(xiàng)參數(shù)處于正常狀態(tài)。iq mhz me4j3scagilent ns010 a"電 t

7、ier 5 啥 nm analyzeraglltrrt e441jb rf power metrunderrifilo prcibbattcrvnafidawestsddjidoommcirculatorshield boxagilent 6631 sbpower supplymbagilent e443kv電ctor馴 g-eneratoirwindows pcgpibgpibt serialto usb interface to radio5.3 安裝iden和mototalk波形到e4438c 儀器中。the following software and files are needed

8、.以下是安裝波形所必備的軟件a. intuilink.exeb. microsoft officec. i_16qam.bin and q_16qam.bin files for iden waveformsd. mts_i.txt and mts2_q.txt files for mototalk waveforms4.3.1 install the intuilink.exe software.安裝intuilink軟件4.3.2 connect a gpib card to e4438c with a gpib cable.將e4438c通過(guò)gpib與電腦進(jìn)行連接4.3.3 open m

9、icrosoft excel打開(kāi)excel表格4.3.4 goto view > toolbars > psg/esg signal generator . the following toolbar will appear.點(diǎn)擊視圖菜單下的工具欄中的psg/esg signal generator 工具欄.p5g/esg 號(hào)gien史 r 己t:口r- x之后會(huì)出現(xiàn)類(lèi)似下面的工具欄卜鵬阿etp蚓e5g 鋁 ：等 o4.3.5 click on agilent psg/esg . the following dialogue box will appear.點(diǎn)擊 agilent p

10、sg/esg 按鈕agilent psg/esg signal generator二£：3； agilent technologiesintuilinkfor psg/esg seriessignal generatorssupported models: 人加曰m onw2b intuilink on th白 web .e 5gg the web psg onthcw-be4435be4438b正4437be4438ce4438ccopyright © 1999-2003, agieri technobgies, version 4.2.0.25component inf

11、ook4.3.6 choose e4438c and press ok.選才i e4438c后點(diǎn)擊ok4.3.7 press the connect to psg/esg signal generator button. 選擇連接到 signal generator。pg/esg signal generator x讀阿ent p5g/e5g 函 金西 c口nn一匚t tdsiign-i 6它口巳-匕口，|4.3.8 choose the correct address for e4438c and press identify instrument . then press connect

12、and the status will show connected ” . next press close button.選才e e4438c儀器正確地址并點(diǎn)擊identify instrument識(shí)別儀器按鈕，然后點(diǎn)擊 connect連接按 鈕，并且右側(cè)的狀態(tài)由原先的disconnect轉(zhuǎn)變?yōu)閏onnected，點(diǎn)擊close關(guān)閉按鈕5.3.9 to load waveform into e4438c. press thedownload arb waveform databutton.p5g/esg 號(hào)cii&ner dtnr x點(diǎn)擊download arb waveform按

13、鈕進(jìn)行下載波形| 漆-如lent psq/esg g 啕固01dovwnhfld arb waveform data5.3.10 in the dialogue, select file folders, etc and browse for the waveforms.進(jìn)入到對(duì)話中1后點(diǎn)擊browse按鈕選擇波形file names: i_16qam.bin and q_16qam.bin選擇i_16qam.bin文件type: 14-bit internal values類(lèi)型：選擇14bit internal values14 位內(nèi)部值file type: little endian文件類(lèi)

14、型：選擇 little endiane4438c generator parameterssample rate: 400 khz使用16qam波形時(shí)將e4438c信號(hào)發(fā)生器的采樣率設(shè)置為400khzfile names: mts2_!.txt and mts2_q.txt文件名為mts2 i.txttype: 14-bit internal values file type: little endian e4438c generator parameterssample rate: 192 khz使用mts2文件時(shí)將e4438c的采樣率設(shè)置為192khzafter choosing the

15、correct waveform, press validate files then start download. after completed downloading the waveform into e4438c, the waveform is then in the volatile memory. in the next step, store the waveform into the non-volatile memory.選擇正確的波形后，點(diǎn)擊validate files按鈕進(jìn)行驗(yàn)證，成功后點(diǎn)擊start download 按鈕進(jìn)行下載波形。下載完畢后將波形永久儲(chǔ)存到e

16、4438c儀器中。5.4 store the iden and mototalk waveforms into non-volatile memory.將波形儲(chǔ)存到儀器中并且保證儀器每次重新啟動(dòng)后都可以選擇此波形。press mode > dual arb > waveform segments . then press store all to nvmfm memory soft key.點(diǎn)擊mode模式按鈕，選擇 dual arb按鈕，點(diǎn)擊 waveform selected按鈕進(jìn)行波形選擇，再點(diǎn)擊 waveform segments按鈕進(jìn)行波形分類(lèi)，點(diǎn)擊store按鈕存儲(chǔ)，選

17、擇 store all to nvmfm memory 按鈕存儲(chǔ)所有波形到存儲(chǔ)器中should the e4438c be powered down and all waveforms in the volatile memory are lost. perform the load waveforms from non-volatile memory to volatile memory by following the following steps.當(dāng)e4438c關(guān)機(jī)后所有存儲(chǔ)在 volatile存儲(chǔ)器中的波形都會(huì)消失，點(diǎn)擊load按鈕將之前存儲(chǔ)的波形調(diào)到volatile存儲(chǔ)器中。.th

18、en, press load all from nvwfmpress mode > dual arb > waveform segmentsmemory soft key.5.5 zero and calibrate the power meter e4418b將 e4418b 功率計(jì)歸零和校準(zhǔn)before starting the test, zero and calibrate the power meter by following the steps below: 在開(kāi)始測(cè)試前，需要按照以下的步驟將功率計(jì)進(jìn)行歸零和校準(zhǔn)。press the <preset> an

19、d <confirm> to preset the power meter key 點(diǎn)擊 preset 按鈕并點(diǎn)擊confirm 確認(rèn)按鈕將功率計(jì)初始化remove the power sensor from connection, and press the <zero/cal> button. 將 power 傳感器與功率計(jì)斷開(kāi)并點(diǎn)擊歸零校準(zhǔn)按鈕。press the <zero> button to zero the power meter.點(diǎn)擊 zero 歸零按鈕將功率計(jì)讀數(shù)歸零connect the power sensor to its refer

20、ence output port. press the <power ref> to on. press the <cal> button to calibrate the power meter.將功率傳感器連接到功率計(jì)的輸出口，并點(diǎn)擊power ref 按鈕進(jìn)行基準(zhǔn)功率輸出，點(diǎn)擊cal 校準(zhǔn)按鈕進(jìn)行校準(zhǔn)。press the <power ref> to off.點(diǎn)擊 power ref 按鈕關(guān)閉基準(zhǔn)功率輸出the power meter is now ready for use. 現(xiàn)在功率計(jì)就可以進(jìn)行使用了。5.6 path loss calibrati

21、onthe path loss calibration consists of three steps.路徑衰減的校準(zhǔn)包含以下三部分。5.6.1 measure the signal generator output 測(cè)量信號(hào)發(fā)生器的輸出connect the power meter sensor directly to the signal generator e4438c. press the <modon/off> button to turn off the modulation. press < rf on/off> to turn on the rf. se

22、t the frequency to the test frequency (refer to product 12m for the test frequencies). set the amplitude to -20 dbm. on the power meter e4418b, set the measure frequency to the same test frequency. record the reading on the power meter. repeat the measurement for the rest of the test frequencies. th

23、e measured data are the reference for the path loss calibration.將功率計(jì)直接連接到 e4438c 上，點(diǎn)擊 mod 按鈕關(guān)閉調(diào)制功能，點(diǎn)擊rf 按鈕打開(kāi) rf 輸出，設(shè)置輸出頻率按照產(chǎn)品 12m 上定義的頻率進(jìn)行設(shè)置，將amplitude 振幅設(shè)置為 -20dbm ，將功率計(jì)的頻率設(shè)置為要測(cè)試的頻率，記錄此時(shí)功率計(jì)的讀數(shù)，重復(fù)此校準(zhǔn)步驟在別的頻率下，這些數(shù)據(jù)可以作為路徑衰減的參考。1.1.1 tx path loss calibration 發(fā)射路徑衰減校準(zhǔn)refer to diagram below, remove the co

24、nnector from the shield box and connect it directly to e4438c.e4438c 上。以下是發(fā)射路徑校準(zhǔn)的連接圖，將屏蔽箱的連接器拿掉并將它直接連接到10 mhz refer eibce h4>me4433cagilent hl 010av ect or signap analyze rthe modulation of the signal generator e4438c should still remain as off. press <rf on/off>to turn on the rf. set the f

25、requency to the tx test frequency. set the amplitude to -20 dbm. on the power meter e4418b, set the measure frequency to the same test frequency. record the reading on the power meter. repeat the measurement for the rest of the test frequencies. compare the measured data to the reference data measur

26、ed in 6.5.1. the tx path loss equals to the difference between the measured data and the measured reference data in 6.5.1. the tx path loss will be used in the tx power measurement.e4438c上的調(diào)制功能始終保持關(guān)閉狀態(tài)，點(diǎn)擊rf按鈕開(kāi)啟射頻輸出，將頻率設(shè)置為手機(jī)的發(fā)射頻率，將振幅設(shè)置為-20dbm ,同樣的將功率計(jì)的頻率設(shè)置為手機(jī)發(fā)射頻率，記錄功率計(jì)的讀數(shù)，重復(fù) 此校準(zhǔn)在其他頻率下。比較此時(shí)的衰減值與之前6.5.

27、1的結(jié)果，這時(shí)發(fā)射路徑的衰減值就等于這次測(cè)量到的值減去6.5.1測(cè)量結(jié)果，這個(gè)衰減值在tx功率測(cè)量中要用到。1.1.2 rx path loss calibration 接收路徑衰減refer to diagram below, remove the connector from the shield box and connect it directly to power meter sensor.以下是接收路徑衰減的連接圖，將屏蔽箱的連接頭直接連接到功率計(jì)上。r 削 llqprqmgpibgpibnafioawest 9?？?.j 皿丸4 hm circulator10 mhz rdeve

28、qice frem e443icagile nt ndloa vector sign al analyzfl ragilent 6631gb power siiijpllyibnltc-ry fliirilinafragiltnl! e4418brf power m«8 era gient e443：etcvector 5ignilgen-eratora.fjknt77sd 20d& dir e ctionaj courier£h leldboxseriaflto usb interface to radiothe modulation of the signal

29、generator e4438c should still remain as off. press <rf on/off>to turn on the rf. set the frequency to the rx test frequency. set the amplitude to -20 dbm. on the power meter e4418b, set the measure frequency to the same test frequency. record the reading on the power meter. repeat the measurem

30、ent for the rest of the test frequencies. compare the measured data to the reference data measured in 5.3.1. the rx path loss equals to the difference between the measured data and the measured reference data in 5.3.1. the rx path loss will be used in the rx sensitivity measurement.e4438c上的調(diào)制功能始終保持關(guān)

31、閉狀態(tài)，點(diǎn)擊rf按鈕開(kāi)啟射頻輸出，將頻率設(shè)置為手機(jī)的接收頻率，將振幅設(shè)置為-20dbm ,同樣的將功率計(jì)的頻率設(shè)置為手機(jī)接收頻率，記錄功率計(jì)的讀數(shù)，重復(fù) 此校準(zhǔn)在其他頻率下。比較此時(shí)的衰減值與之前5.3.1的結(jié)果，這時(shí)接收路徑的衰減值就等于這次測(cè)量到的值減去5.3.1測(cè)量結(jié)果，這個(gè)衰減值在接收靈敏度測(cè)試中要用到。reconnect the equipment back to the configuration for parametric testings.重新將儀器連接回初始狀態(tài)進(jìn)行參數(shù)測(cè)試。5.9 golden sample correlation好品對(duì)機(jī)測(cè)試take the correl

32、ation sample with parametric data measured previously and run through the parametric testing. compare the results with previous measured data. the transmit power correlation should be within +-0.2 dbm. the receive ber correlatation should be within +-0.5 ber. adjust the rx and tx path loss if necess

33、ary. should the correlation fails, inform the maintenance engineering to troubleshoot the test station.將之前做對(duì)機(jī)測(cè)試的好品數(shù)據(jù)拿到并將這個(gè)手機(jī)放入現(xiàn)在的參數(shù)測(cè)試系統(tǒng)中運(yùn)行，比較兩次的測(cè) 量結(jié)果的差異。發(fā)射功率的誤差應(yīng)該在+-0.2dbm之間，接收誤碼率應(yīng)該在+-0.5倍測(cè)量到的誤碼率。如果需要可以調(diào)整接收和發(fā)送的路徑衰減值。如果對(duì)機(jī)測(cè)試失敗請(qǐng)聯(lián)系維護(hù)工程師進(jìn)行測(cè)試站檢查。5.10 set up the hyperterminalrun the hyperterminal on the wi

34、ndow pc. give a name to the connection and click <ok>.打開(kāi)超級(jí)終端并運(yùn)行atudwmin the next screen, select com 1 for the connect using and click ok.選才i com1端口in the next screen, select 19200 for bits per second and none for flow control and click ok.將比特率設(shè)置為19200,lwuuffmwimb 聞總in the next screen, press th

35、e phone disconnect icon to disconnect since the radio under test is not connected to the serial to the usb 丫 cable. to connect, press the phone connect icon.斷開(kāi)連接后再重新?lián)芴?hào)連接。press to connectpress to disconnect5.11 parametric testensure the unit has a test sim card. place the dummy battery pack on the un

36、it. set the powersupply 66319b output voltage to 4.1 volt by press voltage and key in 4.1 and press volt. turn on the radio under test. manually place the radio under test to berbug mode if necessary by pressing“#*#654#*#" , and then press remove the antenna grommet on the phone. position the r

37、adio under test in the rf enclosure and insert both the rf probe and the serial to usb 丫 cable. close the rf enclosure.確保待測(cè)手機(jī)已經(jīng)安裝好sim卡，將虛擬電池放入待測(cè)手機(jī)。將 66319b的電壓設(shè)置為4.1v。打開(kāi)手機(jī)，輸入“ #*#654#*# "點(diǎn)擊ok,進(jìn)入berbug模式并去掉手機(jī)天線的后蓋，將 rf天線連接到此處 并將手機(jī)數(shù)據(jù)線連接到電腦和手機(jī)之間。關(guān)閉屏蔽箱。connect the hyperterminal to the radio under te

38、st by pressing the phone connect icon. press <enter> on the pc keyboard a few times to get the berbug returns from the radio under test to confirm the connection. send the following berbug command to the radio under test.連接超級(jí)終端log erase (this is to clear the iden reset log.)輸入log erase命令擦除手機(jī)日志

39、文件5.12.1 standby currentmod idl (set the radio under test to idle mode)輸入mod idl命令將手機(jī)轉(zhuǎn)入待機(jī)模式led all off (turn off all the leds)輸入led all off命令關(guān)閉手機(jī)所有l(wèi)ed燈read the current on the power supply. this shall be the standby current. record down the reading.讀取此時(shí)的66319b的電流，記錄此時(shí)的待機(jī)電流5.12.2 dispatch teston the e

40、4438c, set the followings:frequency > 859.45 mhz, rf on, modulation on, arb > select 16qam and play, amplitude, > equivalent of -111 dbm taking the rx path loss into consideration. for temperature extreme environment., the amplitude needs to be 3 db higher.在e4438c上將頻率設(shè)置為 859.45mhz，打開(kāi)rf輸出和調(diào)制

41、功能，自定義波形為16qam。振幅的設(shè)置要將-111dbm的固定值和路徑衰減值加在一起。在高低溫測(cè)試中，-111dbm固定值需要改變?yōu)? 108dbm 。on the hyperterminal, send the following berbug commands打開(kāi)超級(jí)終端輸入以下berbug 命令spe int (this select the internal speaker to output the audio)輸入spe int 命令將內(nèi)部喇叭打開(kāi)vol spe 240 (this sets the speaker volume to 240)輸入vol spe 240命令將音量

42、大小調(diào)整到240ale sta 255 (this plays the alert tone selection 255 to the speaker)輸入ale sta 255命令通過(guò)喇叭播放報(bào)警音rx freq 859.45 (this sets the receive frequency at 859.45 mhz)輸入rx freq 859.45 命令將手機(jī)接收頻率設(shè)定為 859.45mhzmod rx (this configures the radio under test to receive mode)輸入mod rx 命令將手機(jī)啟動(dòng)到接收模式go 16 (begin disp

43、laying frame measurements according to display settings. 16 frame measurements will be taken and results output to screen continuously until esc key is pressed.)輸入 go 16 命令開(kāi)始顯示結(jié)果，點(diǎn)擊esc 鍵可取消輸出結(jié)果功能。on the power supply 66319b, read the current. this shall be the dispatch current at 859.45 mhz.在電源上將讀數(shù)記錄

44、在 859.45mhz 這個(gè)頻率對(duì)應(yīng)的電流值上on the hyperterminal, send the following berbug commands to stop the test.輸入以下 berbug 命令停止測(cè)試。ale sto 255 (this stops playing the alert tone selection 255 to the speaker)輸入 ale sto 255 命令將報(bào)警音關(guān)掉spe off (this turns off the speaker selection)輸入spe off 命令關(guān)閉喇叭功能mod idl (this configu

45、res the radio under test to idle mode)輸入mod idl 命令將手機(jī)轉(zhuǎn)入待機(jī)模式。repeat the test for the other frequency (937.49375 mhz) by changing the frequency and amplitude accordingly.重復(fù)此測(cè)試在 937.49375mhz 這個(gè)頻率上并記錄。5.12.3 rx ber teston the e4438c, set the followings:frequency > 859.45 mhz, rf on, modulation on, ar

46、b > select 16qam and play, amplitude, > equivalent of -111 dbm taking the rx path loss into consideration. for temperature extreme environment., the amplitude needs to be 3 db higher.在 e4438c 上將頻率設(shè)置為 859.45mhz ，打開(kāi) rf 輸出和調(diào)制功能，自定義波形為 16qam 。振幅的設(shè)置要將-111dbm 的固定值和路徑衰減值加在一起。在高低溫測(cè)試中， -111dbm 固定值需要改變?yōu)?/p>

47、 -108dbm 。on the hyperterminal, send the following berbug commandsfra 3 (this sets up a 3:1 45ms frame)輸入 fra 3 命令設(shè)置 3:1 45msrx freq 859.45 (this sets the receive frequency at 859.45 mhz)輸入 rx freq 859.45 這個(gè)接收頻率rx ber (this puts the radio under test in slotted receive mode)輸入rx ber 命令將誤碼率跟蹤放入接收模式中mo

48、d rx (this configures the radio under test to receive mode)輸入mod rx 命令將手機(jī)轉(zhuǎn)入接收模式go 16 (begin displaying frame measurements according to display settings. 16 frame measurements will be taken and results output to screen continuously until esc key is pressed.)輸入 go 16 命令顯示測(cè)試結(jié)果read the 1 st value of ber

49、bug return. this shall be the rx ber at 859.45 mhz record down the reading.將第一列的數(shù)值也就是ber 誤碼率記錄下來(lái)on the hyperterminal, send the following berbug commands to stop the test.mod idl (this configures the radio under test to idle mode)輸入 mod idl 命令將手機(jī)轉(zhuǎn)入待機(jī)狀態(tài)repeat the test for the other frequency (937.4937

50、5 mhz) by changing the frequency and amplitude accordingly.在 937.49375mhz 頻率下重復(fù)此測(cè)試turn the signal generator rf to off.關(guān)閉信號(hào)發(fā)生器的 rf 發(fā)射功能5.12.4 tx current teston the hyperterminal, send the following berbug commandsfra 3 (this sets up a 3:1 45ms frame)輸入 fra 3 命令tx freq 813.5125 (this sets the transmit

51、 frequency at 813.5125 mhz)輸入tx freq 813.5125 命令將手機(jī)發(fā)射頻率設(shè)置為 813.5125mhztx pseudo (this sets the tx single slot qam with pseudo ramp)輸入tx pseudo 命令train 200000 (this sets the number of frames of tx slots using pseudo ramp to 200000 before a full training slot occurs)輸入train 200000 命令mod tx (this confi

52、gures the radio under test to transmit mode)輸入mod tx 命令將手機(jī)轉(zhuǎn)入發(fā)射模式from the power supply, read off the current readings. this shall be the tx current at 813.5125 mhz.通過(guò)電源讀取此時(shí)發(fā)射頻率下的電流值on the hyperterminal, send the following berbug commands to stop the test.mod idl (this configures the radio under test

53、to idle mode)輸入 mod idl 將手機(jī)轉(zhuǎn)入待機(jī)模式repeat the test for the other frequency (901.98125 mhz) by changing the frequency.重復(fù)此測(cè)試在 901.98125mhz 頻率下測(cè)試5.12.5 tx frequency error teston the hyperterminal, send the following berbug commandsfra 3 (this sets up a 3:1 45ms frame)輸入 fra 3 命令tx freq 813.5125 (this set

54、s the transmit frequency at 813.5125 mhz)輸入tx freq 813.5125 命令將發(fā)射頻率設(shè)置為 813.5125mhztx pseudo (this sets the tx single slot qam with pseudo ramp)輸入tx pseudo 命令train 2000000 (this sets the number of frames of tx slots using pseudo ramp to 2000000 before a full training slot occurs)輸入train pseudo 200000

55、命令mod tx (this configures the radio under test to transmit mode)輸入mod tx 命令將手機(jī)轉(zhuǎn)入發(fā)射模式on the n9010a vector analyzer, set the center frequency to 813.5125 mhz. by pressingfreq,channel, center freq, 813.5125, mhz . set the reference level to 10 dbm by pressing amptd y scale, 10, dbm . set the frequency

56、span to 200khz by pressingspan, 200, khz . set the resolutionbandwidth (rbw) to 30 khz by pressing bw, res bw, 30, khz. the transmit signal from the unitshould be viewable from the display. to read the frequency of the signal, press peak search. read the signal frequency from the display. this shall

57、 be the tx frequency at 813.5125 mhz. frequency error equals measured frequency minus 813.5125 mhz. express the result in khz. record the result.在 9010a 分析儀上通過(guò)依次點(diǎn)擊freq, channel, center freq 三個(gè)按鈕將中心頻率設(shè)定為 813.5125mhz ，通過(guò) amptd y scale 按鈕將振幅設(shè)置為 10 dbm ，通過(guò) span 按鈕將頻率范圍設(shè)定為 200khz ，通過(guò)依次點(diǎn)擊 bw, res bw 兩個(gè)按鍵將帶寬解析度設(shè)定為 30khz ，此時(shí)發(fā)射信號(hào)將在屏幕中央顯示出來(lái)，點(diǎn)擊peak search 按鍵將 mkr 標(biāo)記顯示出來(lái)，并且將mkr 上面的讀數(shù)減去之前設(shè)定的中心頻率值就會(huì)得