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Chapter 21, Spectrum Analyzer Screen
Field Descriptions
RF In/Ant
This field selects the input port for the analyzer.
Operating Considerations
Maximum signal levels at each port are printed on the front panel.
CAUTION: Connecting a signal of >200 mW to the ANT IN port can cause instrument damage (although
internal protection circuits can typically withstand a short-duration signal of 1 or 2 Watts).
If the overpower circuit is triggered (signified by a warning message at the top of
the screen), remove the signal from the ANT IN port, and press
the MEAS RESET key or turn the Test Set off and on to reset it.
Using the ANT IN port with the field set to High can result in uncalibrated
operation (a message appears on the screen when this happens). The purpose for
the high sensitivity setting is to allow you to look and listen to very low level
signals when absolute accuracy is not essential.
See Also
Sensitivity
field description, on page 463
Span
Sets the span of frequencies to be displayed on the screen.
Operating Considerations
When the Tracking Generator is used, the span also defines the frequency sweep
range.
Spans >1.5 MHz disable the AF Analyzer when the analyzer’s
AF Anl In field is
set to FM Demod, AM Demod, or SSB Demod. This disables all the AF
Analyzer’s measurement and output functions. When the AF Analyzer’s AF Anl
In
field is set to any of the other available inputs, such as Audio In or Ext Mod,
the speaker and AUDIO MONITOR OUTPUT are not affected when the
Spectrum Analyzer’s span is changed.
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