Rohde & Schwarz FSWP Series - Page 97

Remote Commands for the I/Q Analyzer
R&S
®
FSWP
97User Manual 1177.5856.02 ─ 07
Query parameters:
<OffsetSamples> Selects an offset at which the output of data should start in rela-
tion to the first data. If omitted, all captured samples are output,
starting with the first sample.
Range: 0 to <# of samples> – 1, with <# of samples> being
the maximum number of captured values
*RST: 0
<NoOfSamples> Number of samples you want to query, beginning at the offset
you have defined. If omitted, all captured samples (starting at
offset) are output.
Range: 1 to <# of samples> - <offset samples> with <# of
samples> maximum number of captured values
*RST: <# of samples>
Return values:
<IQData> Measured value pair (I,Q) for each sample that has been recor-
ded.
By default, the first half of the list contains the I values, the sec-
ond half the Q values. The order can be configured using
TRACe:IQ:DATA:FORMat.
The data format of the individual values depends on FORMat[:
DATA] on page 98.
Default unit: V
Example:
TRAC:IQ:STAT ON
Enables acquisition of I/Q data
TRAC:IQ:SET NORM,10MHz,32MHz,EXT,POS,100,4096
Measurement configuration:
Sample Rate = 32 MHz
Trigger Source = External
Trigger Slope = Positive
Pretrigger Samples = 100
Number of Samples = 4096
INIT;*WAI
Starts measurement and wait for sync
FORMat REAL,32
Determines output format
To read the results:
TRAC:IQ:DATA:MEM?
Reads all 4096 I/Q data
TRAC:IQ:DATA:MEM? 0,2048
Reads 2048 I/Q data starting at the beginning of data acquisition
TRAC:IQ:DATA:MEM? 2048,1024
Reads 1024 I/Q data from half of the recorded data
TRAC:IQ:DATA:MEM? 100,512
Reads 512 I/Q data starting at the trigger point (<Pretrigger
Samples> was 100)
Retrieving Results