FreeCalypso > hg > freecalypso-tools
annotate doc/RF-cal/CMU200-notes @ 207:d1eb8518f23d
rfcal/Makefile: tsid-test added to SUBDIR
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 14 May 2017 23:09:27 +0000 |
parents | a57c93cf7f5c |
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1 R&S CMU200 is the RF tester used for production RF calibration of FreeCalypso |
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2 GSM devices. The CMU200 can be operated in three ways: manually via the front |
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3 panel, programmatically via GPIB and programmatically via SCPI commands over |
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4 RS-232. GPIB is the industry standard, but for FreeCalypso the Mother has |
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5 adopted the RS-232 control interface method instead in order to avoid the |
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6 exotic hardware and equally exotic drivers and libraries required for GPIB: |
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7 using the RS-232 interface requires absolutely no special hardware or drivers |
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8 or libraries, just userspace C code without any dependencies talking to a |
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9 serial port just like we do when communicating with Calypso target serial ports. |
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10 |
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11 Initialization commands |
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12 ======================= |
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13 |
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14 Our Test System Interface Daemon for the CMU200 will issue the following SCPI |
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15 commands to the instrument on start-up: |
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16 |
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17 *SEC 0 |
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18 *RST;*OPC? |
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19 SYST:NONV:DIS |
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20 SYST:REM:ADDR:SEC 1,"RF_NSig" |
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21 SYST:REM:ADDR:SEC 2,"GSM900MS_NSig" |
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22 SYST:REM:ADDR:SEC 3,"GSM1800MS_NSig" |
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23 SYST:REM:ADDR:SEC 4,"GSM1900MS_NSig" |
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24 SYST:REM:ADDR:SEC 5,"GSM850MS_NSig" |
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25 |
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26 VCXO calibration |
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27 ================ |
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28 |
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29 When commanded to prepare for VCXO calibration, our TSID will command the |
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30 CMU200 as follows: |
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31 |
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32 *SEC 2 |
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33 RFAN:CHAN 40CH |
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34 RFAN:TSEQ GSM5 |
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35 |
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36 Command to read frequency offset: |
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37 |
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38 READ:MOD? |
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40 Signal generator mode |
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41 ===================== |
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43 Turn signal generator on: |
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45 *SEC 1 |
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46 SOUR:RFG:LEV <level_in_dbm> |
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47 SOUR:RFG:FREQ <freq_in_hz> |
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48 INIT:RFG |
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49 |
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50 Turn signal generator off: |
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51 |
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52 ABORT:RFG |