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GSM-MS Non Signalling Measurements
CMU-K20/-K21/-K22/-K23/-K24
1115.6088.12 7.2
E-3
FPRINT .............................................................................
CMUGSMNS: INP:STAT RF4
Define input connector RF4
CMUGSMNS: OUTP:STAT RF3
Define output connector RF3
CMUGSMNS: SENS:CORR:LOSS:INP2 0.0
Make sure that external attenuations are set
CMUGSMNS: SENS:CORR:LOSS:OUTP2 0.0
to zero
FPRINT .............................................................................
FPRINT GENERATOR SETTINGS
FPRINT .............................................................................
CMUGSMNS: CONF:RFG:MOD:BIT:SEL DUMM
Select GSM dummy burst to be generated
CMUGSMNS: CONF:RFG:MOD:TSEQ:SEL GSM0
Select training sequence
CMUGSMNS: CONF:RFG:MOD:TRAN BURS
Select signal shape (burst signal)
CMUGSMNS: SOUR:RFG:FREQ:CHAN 900 MHZ
SetRF carrier frequency
CMUGSMNS: SOUR:RFG:LEV:UTIM –5
Set RF level in used timeslot
CMUGSMNS: INIT:RFG;*OPC?
Switch on RF generator
FPRINT .............................................................................
FPRINT ANALYZER SETTINGS
FPRINT .............................................................................
CMUGSMNS: RFAN:CHAN 900 MHZ
Adjust analyzer frequency to generator freq.
CMUGSMNS: RFAN:TSEQ GSM0
Adjust training sequence analyzed
CMUGSMNS: SYST:ERR?
Read error queue
FPRINT .............................................................................
FPRINT CONFIGURE THE POWER MEASUREMENT
FPRINT .............................................................................
CMUGSMNS: CONF:POW:CONT SCAL,1
Scalar results, one burst per statistics cycle
CMUGSMNS: CONF:POW:CONT:REP SING,NONE,NONE
Single shot measurement, no stop on error
CMUGSMNS: CONF:POW:MPR:CONT SCAL,1
Same settings as before, but for
combined
CMUGSMNS: CONF:POW:MPR:CONT:REP SING,NONE,NONE
power and modulation measurement
FPRINT .............................................................................
FPRINT SETTLE THE EXPECTED POWER (+OVERSHOOT MARGIN) AND MEASURE THE POWER
FPRINT REMEMBER: RFG POWER -5 dBm
FPRINT .............................................................................
CMUGSMNS: LEV:MAX 0
Adjust expected maximum level
CMUGSMNS: READ:POW:MPR?
Start single shot measurement, wait until it is
terminated, and return scalar power and
modulation
results
FPRINT .............................................................................
FPRINT FREE TX MEASUREMENT DSP RESOURCES
FPRINT .............................................................................
CMUGSMNS: ABOR:POW:MPR
Abort combined power/mod measurement,
free
resources
FPRINT .............................................................................
FPRINT RFG POWER -10 dBm, USING FASTER WIDEBAND PEAK POWER METER
FPRINT .............................................................................
CMUGSMNS: SOUR:RFG:LEV:UTIM -10;*OPC?
Select RF level in used timeslot
CMUGSMNS: LEV:MAX –5
Adjust expected maximum level
CMUGSMNS: READ:SPOW?
Start single shot wide band peak power
measurement, wait until it is terminated,
and return result
The measurement can be easily repeated at other RF levels or with different configurations.
深圳德标仪器
135-1095-0799
Summary of Contents for CMU-K20
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