R&S ESU Series Operating Manual page 643

R&S ESU
[SENSe<1|2>:]POWer:ACHannel:REFerence:TXCHannel:MANual 1 to 12
This command selects a transmission channel to be used as a reference channel in relative adjacent
channel power measurements.
The command is available only for multi carrier channel and adjacent channel power measurements
(CALC:MARK:FUNC:POW:SEL MCAC) in the frequency domain (span > 0).
Example:
"POW:ACH:REF:TXCH:MAN 3"
'Transmission channel 3 is used as a reference channel.
Characteristics: *RST value: 1
SCPI: device-specific
Mode: A-F
[SENSe<1|2>:]POWer:ACHannel:PRESet ACPower | CPOWer | MCACpower | OBANdwidth |
OBWidth | CN | CN0
This command adjusts the frequency span, the measurement bandwidths and the detector as required
for the number of channels, the channel bandwidths and the channel spacings selected in the active
power measurement. If necessary, adjacent channel power measurement is switched on prior to the
adjustment.
To obtain valid results, a complete sweep with synchronization to the end of the sweep must be
performed after the adjustment. Synchronization is possible only in the single-sweep mode.
The result is queried with the command CALCulate:MARKer:FUNCtion:POWer:RESult?.
The command is available only for measurements in the frequency domain (span > 0).
Example:
"POW:ACH:PRES ACP"
'Sets the frequency span, the measurement bandwidths and the detector as
required for the ACP measurement in screen A.
"INIT:CONT OFF"
'Switches over to single-sweep mode.
"INIT;*WAI"
'Starts a sweep and waits for the end of the sweep.
"CALC:MARK:FUNC:POW:RES? ACP"
'Queries the result of the adjacent channel power measurement.
Characteristics: *RST value: -
SCPI: device-specific
Mode: A-F
[SENSe<1|2>:]POWer:ACHannel:PRESet:RLEVel
This command adapts the reference level to the measured channel power and – if required - switches
on previously the adjacent channel power measurement. This ensures that the signal path of the
instrument is not overloaded. Since the measurement bandwidth is significantly smaller than the signal
bandwidth in channel power measurements, the signal path can be overloaded although the trace is
still significantly below the reference level. If the measured channel power equals the reference level,
the signal path is not overloaded.
The command is only available in the frequency domain (span > 0).
6.204
Remote Control – Description of Commands
Operating Manual 1302.6163.12 - 03
SENSe Subsystem