R&S 1129.7246.03, Operating Manual

Page: 691 / 855

R&S ESU Remote Control – Description of Commands
TRACe Subsystem
6.252 Operating Manual 1302.6163.12 - 03
Fig. 6.45 Block diagram illustrating the R&S ESU signal processing
All trigger sources except for VIDeo can be used for triggering. The number of test points to be recorded
prior to the trigger time can be selected for all of the available trigger sources except for FREE RUN,
where this parameter is always to be assigned the value 0). Measurement results are output in the form
of a list, with the Q values following immediately after the list of I values in the output buffer. The FOR-
MAT command can be used to select between binary output (32 bit IEEE 754 floating-point values) and
output in ASCII format.
The commands of this subsystem can be used in two ways:
• Measurement and result query with one command:
This method causes the least delay between measurement and output of the result data, but it requires
the control computer to wait actively for the response data.
• Setting up the instrument, start of the measurement via "INIT" and query of the result list at the end of
the measurement:
With this method the control computer can be used for other activities during the measurement. In this
case the additional time needed for synchronization via service request must be taken into account.
TRACe<1|2>:IQ:DATA?
This command starts a measurement with the settings defined via
TRACe:IQ:SET
and returns the list
of measurement results immediately after they are corrected in terms of frequency response. The
number of measurement results depends on the settings defined with
TRACe:IQ:SET
, the output
format depends on the settings of the
FORMat
– subsystem.
Parameter: none
Maximum useful bandwidth
Sample rate from Sample rate to Maximum bandwidth
> 81.6 MHz <163.2 MHz 0.68 sample rate
163.2 MHz 326.4 MHz 120 MHz
The command requires that all response data are read out completely before the
instrument accepts further commands.