Stanford Research Systems SR780, Operating Manual And Programming Reference

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5-92 Data Transfer Commands
SR780 Network Signal Analyzer
FBIN ? d, x
The FBIN ? command queries the bin number of x (frequency or time) in display
d. The parameter d selects Display A (0) or Display B (1). The parameter x is a
floating point value of Hz or seconds.
The returned value is an integer bin number.
TLOD ? i, n
The TLOD command loads binary data into Trace i. The parameter i selects
Trace 1 through 5. This command is valid only via the GPIB interface.
The target Trace i must already store data of the measurement type and length to
be loaded from the interface. The loaded data simply takes the place of the stored
trace data and assumes the measurement parameters (Measurement, Averaging,
Window, Frequency span, etc.) and length of Trace i.
TLOD loads the actual complex data values in the trace, NOT the data displayed
in a particular view. Remember, views are simply different ways of showing the
actual complex data.
A trace contains n complex points. The value of n depends upon the type and
length of the target trace.
Trace Type n
FFT, Coherence, CrossSpec, Transfer Function
100 FFT lines 128 (1st 101 points displayed)
200 FFT lines 256 (1st 201 points displayed)
400 FFT lines 512 (1st 401 points displayed)
800 FFT lines 1024 (1st 801 points displayed)
Correlations
Uniform window 2.56 times number of FFT lines
(imaginary parts all zero)
T/2 window 1.28 times number of FFT lines
(imaginary parts all zero)
Time Records
Baseband Time 2.56 times number of FFT lines
(all points are real, the imaginary
parts should all be zero)
Non-baseband Time 1.28 times number of FFT lines
(all points are complex)
Octave number of displayed bins + 1
(the power bin is the last point)
(all points are real, the imaginary
parts should all be zero)
Swept Sine Number of points in the sweep