R&S ESU Series Operating Manual page 622

R&S ESU
6.16.9 SENSe:LIST Subsystem
The commands of this subsystem are used for measuring the power at a list of frequency points with dif-
ferent device settings. The measurement is always performed in the time domain (span = 0 Hz).
A new trigger event is required for each test point (exception: Trigger FREE RUN).
The results are output as a list in the order of the entered frequency points. The number of results per
test point depends on the number of concurrently active measurements (peak/RMS/average).
Selection of concurrently active measurements and setting of parameters that are constant for the whole
measurement is via a configuration command (SENSe:LIST:POWer:SET). This also includes the set-
ting for trigger and gate parameters.
The following setting parameters can be selected independently for each frequency point:
• Analyzer frequency
• Reference level
• RF attenuation
• Resolution filter
• Resolution bandwidth
• Video bandwidth
• Measurement time
• Detector
The number of frequencies is limited to 100 entries.
The commands of this subsystem can be used in two different ways:
1. Instrument setup, measurement and querying of the results in a single command:
With this method, there is the least delay between the measurement and the result output. However,
it requires the control computer to wait for the response from the instrument.
2. Instrument setup and querying of the result list at the end of the measurement:
With this method, the control computer may be used for other activities while the measurement is being
performed. However, more time is needed for synchronization via service request.
Settings that are not directly included in commands of this subsystem can be con-
figured by sending the corresponding commands prior to the SENSe:LIST com-
mands.
Please note that changes to the trigger level have to be executed in time domain
(span = 0 Hz) in order to take effect for the SENSe:LIST commands.
[SENSe<1|2>:]LIST:POWer:RESult?
This command queries the result of a previous list measurement as configured and initiated with
SENSe:LIST:POWer[:SEQuence]. The measured results are output in a list of floating point values
separated by commas. The unit of the results depends on the setting made with the CALC:UNIT
command.
This command may be used to obtain measurement results in an asynchronous way, using the service
request mechanism for synchronization with the end of the measurement.
If no measurement results are available, the command will return a query error.
Operating Manual 1302.6163.12 - 03
Remote Control – Description of Commands
SENSe Subsystem
6.183