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
499
:MEASure:GSM:ARRay:RFSPectrum:ACPM:MODPower
Description
Performs the measurement of the ACPM modulation spectrum a specific number of
times (set with the
int1
parameter). To read out the entire measurement results
array, use the
:FETCh:GSM: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.
More information regarding
ARRay
measurements can be found in section :MEA-
Sure:ARRay.
Query
The query form of this command will perform the measurement the specified number
of times (
int1
parameter). As soon as all measurements have been completed, all
measurement result values will be returned in a string. The string delivered back will
contain (23 *
int1
) floating point real numbers. The physical dimension is dBc.
The single measurement results are 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:GSM:ARR:RFSPectrum:ACPM:MODulation 5
:FETCh:GSM:RFSP:ACPM:MOD?
The string returned would contain 115 floating point real numbers, representing the
23 measurement result values of five measurement runs.
Syntax :MEASure[:GSM]:ARRay:RFSPectrum:ACPM:MODPower <int1>
Parameters int1
is an integer.
The minimum value for
int1
is
0
, the maximum value is
100
. The default value for
int1
is
0
.
Description
Performs the measurement of the ACPM modulation spectrum a specific number of
times (set with the int1 parameter). To read out the entire measurement results
array, use the
:FETCh:GSM:RFSP:ACPM:MODP
command.
Notes
– The first result is the absolute power in dBm, measured at the center frequency.
The remaining 23 values are the same as from the
ACPM:MODulation
com-
mand.
– 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.
Including the carrier frequency (0.0 dBc), this adds up to the 23 measurement
values returned. All measurements will be performed with a measuring band-
width of 30 kHz.
More information regarding ARRay measurements can be found in section
:MEASure:ARRay
.