R&S FSQ Signal Analyzer - Rohde & Schwarz

R&S FSQ Remote Control – Programming Examples
More Complex Programming Examples
In binary format, the length information carried in the message header is evaluated
and used for calculating the x-axis values.
Binary data is read in three steps:
1. The number of digits carrying the length information is read.
2. The length information itself is read.
3. The trace data is read.
This procedure is necessary with programming languages like Visual Basic which
support only structures of identical data types (arrays), whereas the binary data format
uses different data types in the header and the data section.
The arrays for measured data are dynamically dimensioned to allow the example
to be easily adapted to individual requirements.
---REM
************************************************************************
Public Sub ReadIQData()
'--------- Create variables -----------------------------------------------
Dim IData() As Single
'I values as single floats
Dim QData() As Single
'Q values as single floats
Dim digits As Byte
'No. of digits as length information
Dim IQBytes As Long
'Length of trace data in bytes
Dim IQSamples As Long
'No. of trace data in Samples
Dim LastSize As Long
'Length of last block in bytes
Const BlockSize = 524288
'Block size in R&S FSQ, as per manual
result$ = Space$(100)
'Buffer for simple results
'--------- R&S FSQ default setting ---------------------------------------
Call SetupInstrument
'Default setting
'Activate I/Q data acquisition mode; must be done before
TRAC:IQ:SET!
status = viWrite(analyzer, "TRAC:IQ:STAT ON", 15, retCnt)
' Number of test points (800 000)
' (max. test points allowed (= 16 * 1024 * 1024 - 512))
' at RBW 50 MHz,sample rate 80 MHz, trigger free run, pos.
trigger edge and 0 s trigger delay.
status = viWrite(analyzer, "TRAC:IQ:SET NORM,50MHz,80MHz,IMM,POS,0,800000",
45, retCnt)
Operating Manual 1313.9681.12 - 01 7.25