R&S FSH Spectrum Analyzer Mode
Configuring Spectrum Measurements
Operating Manual 1173.6275.12 - 30 123
► Select the "n dB Down" menu item
The R&S FSH displays two temporary markers on the left and on the right of the
reference marker M1. It also shows the bandwidth between the n dB down
markers.
You can then adjust the distance of the temporary markers.
► Press the "Marker Function"
softkey.
► Select the "n dB Down" menu item
The R&S FSH opens an input field
► Enter a different distance (in this
case 6 dB).
The R&S FSH again shows the
temporary markers, this time with
a broader bandwidth.
Demodulating Signals
The R&S FSH features an AM and FM demodulator to demodulate and monitor audio
signals. It demodulates the signal at the marker frequency.
You can listen to the demodulated signal with the internal speaker or headphones that
you can connect to the 3.5 mm headphone jack on the top of the R&S FSH.
When demodulating an AM modulated signal, the R&S FSH turns the video voltage
into an audible sound. You should therefore set the reference level to about the level of
the signal that you are demodulating.
If you perform measurements in the time domain, the R&S FSH demodulates
continuously. In the frequency domain, you can define a time period the R&S FSH
demodulates the signal at the marker frequency. The frequency sweep then stops at
the marker frequency for that time before finishing the sweep.
► Press the MARKER key.
► Press the "Marker Function" softkey.
► Select the demodulation scheme you require from the menu.
The R&S FSH starts to demodulate the signal.
Demodulating signals
If you turn on the demodulator, the R&S FSH automatically turns off the noise marker
or the frequency counter.
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