R&S ESU Series, Operating Manual

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Operating Manual 1302.6163.12 - 03 6.247
R&S ESU Remote Control – Description of Commands
TRACe Subsystem
SPURious reads the peak list in the spurious measurement. As results a list of
frequency, level and delta to limit line values is returned. A delta limit of +200dB
indicates no limit check is active.
PHOLd reads the maximum value obtained from successive measurements.
SINGle is possible only in form of a query for single measurements in the receiver
mode. The values of all activated detectors are transferred separated by commas
in the following order: POS, NEG, QPE, AVER, RMS. For inactive detectors, the
value and the comma are omitted at the position(s) in question.
SCAN is only possible in form of a query during scan measurements. The number
of transmitted measurements results depend on the scan settings.
STATus is only possible in form of a query during the scan measurements. 1 byte
status information per measurement result is transmitted:
bit 2: overrange trace1 to 3;
FINAL1 to FINAL3 are only possible in form of a query. The final measurement
values are transmitted.
Return value: The returned values are scaled in the current level unit. Returned FM-modulated
measurement values (activated option R&S FS-K7) are scaled in Hz.
Example:
"TRAC TRACE1,"+A$ (A$: data list in the current format)
"TRAC? TRACE1"
Characteristics: *RST value: -
SCPI: conforming
Mode: all
Return value: The returned values are scaled in the current level unit. Returned FM-modulated
measurement values (activated option FS-K7) are scaled in Hz.
ASCII format (FORMat ASCII):
In ASCII format, a list of values separated by commas is returned (Comma Separated Values = CSV).
The number of measurement points is 625 (default). For more information refer to “SWEEP POINTS”
on page 4.122 ).
Binary format (FORMat REAL,32):
If the transmission takes place using the binary format (REAL,32), the data are transferred in block
format (Definite Length Block Data according to IEEE 488.2). They are arranged in succeeding lists of
I and Q data of 32 Bit IEEE 754 floating point numbers. General structure of return string for a sweep
with 625 points:
#42500<meas value 1><meas value value2>...<meas value 625>
with
– #4: digits of the subsequent number of data bytes (4 in the example)
– 2500: Number of subsequent data bytes (2500 in the example)
– <meas value x>: 4 byte floating point measurement values