Operating instructions

TRACe Subsystem R&S ESCI
1166.6004.12 6.224 E-1
Number and format of the measurement values for the different operating modes
The number of measurement values depends on the instrument setting:
SPECTRUM mode (span > 0 and zero span):
501 results are output in the unit selected for display.
Note: With AUTO PEAK detector, only positive peak values can be read out.
Trace data can be written into the instrument with logarithmic display only in dBm,
with linear display only in volts.
FORMat REAL,32 is to be used as format for binary transmission, and FORMat ASCii for
ASCII transmission.
Receiver
Note: For reasons of compatibility with the EMI test receiver, the data structure of the
status information is designed for 4 traces. However, only 3 traces can be activated
and transferred.
SINGle is possible only as 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 measurement results depends on the scan settings.
FORMAT REAL,32 is to be used as format setting for binary transmission.
Structure of transmitted data:
- 4 byte: trace status: bit 0 to 9 subscan; bit 10: last block of subscan; Bit 11: last block of
last subscan of scan; Bit 12: last of all blocks (for multiple scans after the last scan)
- 4 bytes:number n of the transmitted measurement results of a trace
- 4 byte:trace1 active (0/1)
- 4 byte:trace2 active (0/1)
- 4 byte:trace3 active (0/1)
- 4 byte:reserved
- n*4 bytes:measurement results of trace 1 if trace 1 is active
- n*4 bytes:measurement results of trace 2 if trace 2 is active
- n*4 bytes:measurement results of trace 3 if trace 3 is active
- n*1 byte:status information per measurement result:
bit 0: underrange trace1; bit 1: underrange trace2;bit 2: underrange trace3;
bit 3: overrange trace1 to trace4
STATus is only possible in form of a query during scan measurements. 1 byte status
information per measurement result is transmitted:
bit 0: underrange trace1; bit 1: underrange trace2;bit 2: underrange trace3;
bit 3: overrange trace1 to trace3
FINAL1, FINAL2 and FINAL3 are only possible in form of a query. The final measurement values
are transmitted.
TRACe:FEED:CONTrol<1 to 4> ALWays | NEVer
This command switches block data transmission during a scan on and off. The block size
depends on the scan time, the trace number is not evaluated.
Example: "TRAC:FEED:CONT ALW"
Features: *RST Value: NEVer
SCPI: conforming
Mode:R