Rohde & Schwarz FSQ series, Быстрый старт

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R&S FSQ Basic Measurement Examples
Measuring Signal Spectra with Multiple Signals
5.16 Quick Start Guide 1313.9652.62 - 02
Operating steps on the R&S FSQ:
1. Reset the instrument.
➢
Press the PRESET key.
The R&S FSQ is now in the default state.
2. Set the center frequency to 100.015 MHz and the frequency span (SPAN) to 300 kHz.
➢
Press the FREQ key and enter 100.015 MHz .
➢
Press the SPAN key and enter 300 kHz .
3. Set the resolution bandwidth to 30 kHz and the video bandwidth to 1 kHz.
➢
Press the BW key.
➢
Press the RES BW MANUAL softkey and enter 30 kHz .
➢
Press the VIDEO BW MANUAL softkey and enter 1 kHz .
➢
The two signals can be clearly distinguished by a 3 dB level drop in the center of the
screen.
Fig. 5-6 Measurement of two equally-sized RF sinusoidal signals with the resolution
bandwidth which corresponds to the frequency spacing of the signals.
The video bandwidth is set to 1 kHz in order to make the level drop in
the center of the two signals clearly visible. At larger video bandwidths,
the video voltage that results from envelope detection is not sufficiently
suppressed. This produces additional voltages, which are visible in the
trace, in the transition area between the two signals.