R&S FSQ Signal Analyzer - Rohde & Schwarz

R&S FSQ Getting Started
Measurements on Modulated Signals
3. Set the reference level to +6 dBm and the display range to linear
➢ Press the AMPT key and enter 6 dBm.
➢ Press the RANGE LINEAR softkey.
4. Use the video trigger to trigger on the AF signal in order to obtain a
stationary display
➢ Press the TRIG key.
➢ Press the VIDEO softkey.
The video trigger level is set to 50% if the instrument is switched on for the first
time. The trigger level is displayed as a horizontal line across the graph. The
R&S FSQ displays the 1 kHz AF signal stably in the time domain.
Fig. 2.18 Measuring the AF signal from a 1 kHz AM carrier
The AM/FM demodulator in the R&S FSQ can be used to output the AF by
means of a loudspeaker.
5. Switch on the internal AM demodulator
➢ Press the MKR FCTN key.
➢ Press the MKR DEMOD softkey.
The R&S FSQ switches the AM demodulator on automatically.
➢ Turn up volume control.
A 1 kHz tone is output by the loudspeaker.
2.28 Operating Manual 1313.9681.12 - 01