Rohde & Schwarz R&S FSP Series, Operating Manual

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Operating Manual 1164.4556.12 - 06 2.27
R&S FSP Getting Started
Measurements on Modulated Signals
2.5.2.1 Measurement Example – Displaying the AF of an FM carrier
Test setup:
Settings on the signal generator (e.g. R&S SMIQ):
Measurement with the R&S FSP:
1. Set the R&S FSP to its default state
➢
Press the PRESET key.
The R&S FSP is in its default state.
2. Set the center frequency to 99.64 MHz and the span to 300 kHz.
➢
Press the FREQ key and enter 99.64 MHz.
➢
Press the SPAN key and enter 300 kHz .
3. Set a resolution bandwidth of 300 kHz.
➢
Press the BW key.
➢
Press the RES BW MANUAL softkey and enter 300 kHz .
4. Set a display range of 20 dB and shift the filter characteristics to the middle
of the display.
➢
Press the AMPT key.
➢
Press the RANGE LOG MANUAL softkey and enter 20 dB .
➢
Press the NEXT key.
➢
Set the GRID softkey to REL .
➢
Press the PREV softkey.
➢
Using the spinwheel, shift the reference level so that the filter edge intersects
the - 10 dB level line at the center frequency.
The slope of the 300 kHz filter is displayed. This corresponds to the
demodulator characteristics for FM signals with a slope of approx. 5 dB/100
kHz.
Frequency: 100 MHz
Level: -30 dBm
Modulation: FM 0 kHz deviation (i.e., FM = off), 1 kHz AF
Signal
generator
FSP