HP 8591C Manual de usuario Pagina 200

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Making Basic Measurements Using Spectrum Analyzer Mode
Using the Analyzer As a Receiver in Zero Frequency Span
3. To demodulate the AM, press
(BW).
Increase the resolution bandwidth to
include both sidebands of the signal within the passband of the spectrum
analyzer.
4. Next, position the signal peak near the reference level and select a linear
voltage display. Press
(AMPLITUDE_)
and change the reference level, then
press SCALE LOG LIN to underline LIN.
5.
To select zero span, either press (SPAN), 0 (Hz) or press ZERO SPAN See
Figure 4-26. If the modulation is a steady tone (for example, from a signal
generator), use video trigger to trigger on the waveform and stabilize the
display. Adjust the sweep time to change the horizontal scale.
Use markers and delta markers to measure time parameters of the waveform.
NEXT
PK
RIGHT
Figure 4-26. Measuring Modulation In Zero Span
4-39
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