2Measurement Example 2 - Measuring The Modulation Depth Of An Am Carrier In The Frequency Domain - Rohde & Schwarz R&S FSP Series Operating Manual

R&S FSP
5. Switch on the internal AM demodulator
2.5.1.2 Measurement Example 2 – Measuring the modulation depth of an AM carrier in
the frequency domain
Test setup:
Signal
generator
Settings on the signal generator (e.g. R&S SMIQ):
Frequency:
Level:
Modulation:
Measurement with the R&S FSP:
1. Set the R&S FSP to its default state
2. Set the center frequency to 100 MHz and the span to 0 kHz
Operating Manual 1164.4556.12 - 06
Fig. 2-2 Measuring the AF signal from a 1 kHz AM carrier
If the R&S FSP is equipped with the AM/FM Demodulator option (R&S FSP-
B3), the AF can be monitored on the built-in loudspeaker.
Press the MKR FCTN key.
Press the MKR DEMOD softkey.
The R&S FSP switches the AM demodulator on automatically.
Turn up volume control.
A 1 kHz tone is output by the built-in loudspeaker.
FSP
100 MHz
-30 dBm
50 % AM, 1 kHz AF
Press the PRESET key.
The R&S FSP is in its default state.
Press the FREQ key and enter 100 MHz.
Getting Started
Measurements on Modulated Signals
2.25