WILLTEK 4400 Mobile Phone Tester Series, Руководство пользователя

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Appendix A SCPI Command Reference
MEASure subsystem
4460 GSM System Option and 4468 EDGE System Option Version 12.20
565
:MEASure:EGPRs[:CONTinuous]:MULTislot:RFSPectrum:
ACPM:MODulatio
:MEASure:EGPRs[:CONTinuous]:MULTislot:RFSPectrum:
ACPM:TRANsient
Syntax :MEASure:EGPRs[:CONTinuous]:MULTislot:RFSPectrum:ACPM:
MODulation
Parameters
There are no parameters.
Description
Measures repetitively the output spectrum due to modulation for each of the time
slots assigned by the Willtek 4400 using the
:CONFigure:EGPRs:MSTA-
tion:MSLot
command. To read out the latest measurement results, use the
:
FETCh:EGPRs:MULT:RFSP:ACPM:MOD
command.
Note: According to GSM specification 05.05, this measurement will be performed on
(±)100 kHz and (±)250 kHz offset from the carrier as well as on all multiples of 200
kHz offset from the carrier up to (and including) an offset of (±)1.8 MHz. If one
includes the carrier frequency as well (0.0 dBc), this adds up to the 23 measurement
values returned. All measurements will be performed with a measuring bandwidth of
30 kHz.
Query
The query form of this command starts the measurements and delivers a string, con-
taining an integer indicating the number of time slots measured followed by 23 float-
ing point real numbers for each time slot representing the spectrum values with the
physical dimension dBc (dB relative to the carrier, being the transmission frequency
of the mobile), separated by commas. The 23 values represent the power in a 30 kHz
bandwidth at the following frequencies: -1.8 MHz, -1.6 MHz, -1.4 MHz, -1.2 MHz, -
1.0 MHz, -800 kHz, -600 kHz, -400 kHz, -250 kHz, -200 kHz, -100 kHz, 0 kHz,
+100 kHz, 200 kHz, 250 kHz, 400 kHz, 600 kHz, 800 kHz, 1.0 MHz, 1.2 MHz, 1.4 MHz,
1.6 MHz, 1.8 MHz.
Example
:MEAS:EGPRs:CONT:MULT:RFSP:ACPM:MOD?
For the number of time slots measured set to 1, an example of the string returned is:
"
1,5.1,6.3,10.2,12.8,9.6,16.0,15.3,18.9,17.5,13.3,12.2,
11.9,10.6,9.1,8.7,7.6, 9.6,6.4,5.9,4.4,6.7,3.6,2.7
".
Syntax
:MEASure:EGPRs[:CONTinuous]:MULTislot:
RFSPectrum:ACPM:TRANsient
Parameters
There are no parameters.