Rohde & Schwarz FSQ series, Быстрый старт

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Quick Start Guide 1313.9652.62 - 02 5.31
R&S FSQ Basic Measurement Examples
Measurements in the Time Domain
3. Set the resolution bandwidth to 300 kHz.
➢
Press the BW key.
➢
Press the RES BW MANUAL softkey and enter 300 kHz .
4. Set the display range to 20 dB and shift the filter trace to the center of the screen.
➢
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 key.
➢
Using the rotary knob, set the reference level such that the filter edge at the center
frequency intersects the –10 dB level line.
The filter edge of the 300 kHz filter will appear on screen. This corresponds to the
demodulator characteristic for FM signals with a steepness of approx. 5 dB/100 kHz.
Fig. 5-17 Display of the filter edge of the 300 kHz filter as an FM discriminator
characteristic
5. Set the FM deviation to 100 kHz and the AF to 1 kHz on the signal generator.
6. Set the frequency deviation to 0 Hz on the R&S FSQ.
➢
Press the SPAN key.
➢
Press the ZERO SPAN softkey.
The demodulated FM signal will appear on screen. The signal is continuous across the
screen.