R&S FSH Interference Analyzer (R&S FSH-K15/ -K16)
Working with Maps
Operating Manual 1173.6275.12 - 30 166
5.2.4.2 Using an Audio Signal to Locate Interferers
You can configure the R&S FSH to play back an audio signal when it receives a signal.
The audio signal changes its volume and frequency, depending on the strength of the
received signal.
► Press the "Settings" softkey.
► Select the "Tone [ ]" menu item.
The R&S FSH turns the audio signal on.
The R&S FSH allows you to define various aspects of this audio signal.
Defining a squelch level
The squelch level defines the signal level above which the audio signal starts to play.
The squelch level is variable.
► Press the "Settings" softkey.
► Select the "Squelch Level" menu item.
The R&S FSH opens an input field to define the squelch level.
► Enter a squelch level in dBm as required.
The R&S FSH displays the squelch level graphically in the power bar element of
the user interface.
Defining the threshold of the audio signal
The audio signal has a specific frequency that is coupled to a specific signal level, the
threshold. As the signal you are receiving during a measurement becomes stronger or
weaker, the audio signal changes its frequency:
● When the signal becomes stronger, the frequency of the audio signal gets higher
● When the signal becomes weaker, the frequency of the audio signal gets lower
You can define the threshold of the base tone as necessary.
► Press the "Settings" softkey.
► Select the "Tone Threshold" menu item.
The R&S FSH opens an input field to define the threshold.
► Enter a threshold level in dBm as required.
Note that it may be possible that the audio signal frequency becomes so high or low
that it is no longer audible.
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