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Spectrum Analyzer Mode Key Descriptions
Spectrum Analyzer Mode Functions
CONTINUS
FFT
initializes the fast Fourier transform (FFT) function, puts the
analyzer in continuous sweep and performs an FFT at the
end of each sweep. If the FFT function is already active, it
puts the analyzer in continuous sweep and performs
FFTs.
After using the FFT function, the display is in log mode.
The markers are put in the FFT mode for use in evaluating
the data. The signal being transformed is in trace A and
the Fourier transform of the signal is in trace B. (Any
information that was in trace B and C will be lost.) Press
FFT OFF to return the analyzer to normal operation.
Refer to Chapter 5, “Measuring Amplitude Modulation Using
the Fast Fourier Transform Function,
))
for more information.
Front-Panel Key Access
(jjj
initiates an output of the screen data, without an external
controller, to a previously specified graphics printer or
plotter. Refer to Chapter 1 of this manual or the HP 8590
E-Seri’es
and L-Series
S’trum
Analyzers and HP 8591C
Cable TV Analyzer Programmer’s Guide for detailed
information about printing and plotting.
The printer or plotter must have already been selected
using
[CONFIG-]
and either Plot Conf ig (for a plotter)
or Print Conf ig (for a printer). To obtain a print,
press
(m),
COPY
DEV
PRNT PLT (so that PRNT is
underlined), then Print Conf ig Use BAUD RATE to
change the baud rate of the analyzer, if necessary. For
Option 021, use PRINTER ADDRESS to change the HP-IB
address of the printer, if necessary.
If the analyzer is connected to an HP PaintJet printer and
you want a color printout, press
PAINTJET
PRINTER If
the analyzer is connected to an HP PaintJet printer and you
want a black and white printout, press HP
B&W
PRINTER .
More printer information can be found in the HP 8590
E-Series and L-Series
Spectrum
Analyzers and HP 8591C
6-45