Operating instructions

R&S ESCI TRACe Subsystem
1166.6004.12 6.229 E-1
TRACe<1|2>:IQ:DATA:MEMory? <offset samples>,<# of samples>
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
command TRACe:IQ:SET, 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 command
TRACe:IQ:SET.
<# 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
command TRACe:IQ:SET.
Examples: "TRAC:IQ:STAT ON" 'Enable acquisition of I/Q data
"TRAC:IQ:SET NORM,10MHz,32MHz,EXT,POS,100,4096"
'Configure measurement:
'Filter type:Normal
'RBW:10 MHz
'Sample Rate:32 MHz
'Trigger Source:External
'Trigger Slope:Positive
'Pretrigger Samples:100
'# of Samples:4096
"INIT;*WAI" 'Start measurement and wait for sync
"FORMatREAL,32" 'Determine output format
'Read results:
"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)
Return values:
The result 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 command TRACe:IQ:DATA?
Characteristics: *RST value: --
SCPI: device specific
Mode: A-T