TRACe Subsystem R&S FSL
1300.2519.12 6.274 E-11
E
xample
T
RAC:IQ:STAT ON
Enables acquisition of I/Q data
TRAC:IQ:SET NORM,10MHz,32MHz,EXT,POS,0,4096
Measurement configuration:
Sample Rate: 32 MHz
Trigger Source: External
Trigger Slope: Positive
Pretrigger Samples: 0
# of Samples: 4096
FORMat REAL,32
Selects format of response data
TRAC:IQ:DATA?
Starts measurement and reads results
Characteristics
*RST value: –
Note: Using the command with the *RST values for the TRACe<1|2>:IQ:SET command, the
following minimum buffer sizes for the response data are recommended: ASCII format
10 kBytes, binary format: 2 kBytes
SCPI: device–specific
Mode
A–T
TRACe<1|2>:IQ:DATA:MEMory?
This command permits the readout of previously acquired (and frequency response corrected)
I/Q data from the memory, with indication of the offset related to the start of measurement and
with indication of the number of measurement values. Therefore a previously acquired data set
can be read out in smaller portions. The maximum amount of available data depends on the
settings of the TRACe<1|2>:IQ:SET command, the output format on the settings in the
FORMat subsystem.
Note: The command requires that all response data are read out completely before the
instrument accepts further commands.
If there are not I/Q data available in memory because the corresponding measurement
had not been started, the command will cause a query error.
Parameter
<offset samples> Offset of the values to be read related to the start of the acquired data.
Value range: 0 to <# of samples> – 1, with <# of samples> being the
value indicated with the TRACe<1|2>:IQ:SET command.
<# of samples> Number of measurement values to be read.
Value range: 1 to <# of samples> – <offset samples> with <# of
samples> being the value indicated with the TRACe<1|2>:IQ:SET
command.
Return values
The returned values are scaled linear in unit Volt and correspond to the voltage at the RF input
of the instrument.
The format of the output buffer corresponds to the TRACe<1|2>:IQ:DATA? command.
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