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Quick Start Guide 1313.9652.62 - 02
5.19
R&S FSQ
Measuring Signal Spectra with Multiple Signals
5.4.1.2 Measuring the Modulation Depth of an AM-Modulated Carrier in the Frequency
Domain
In the frequency range (scan) display, the AM side bands can be resolved with a narrow
bandwidth and measured separately. The modulation depth of a carrier modulated with a
sinusoidal signal can then be measured. Since the dynamic range of an analyzer is very large,
extremely small modulation depths can also be measured precisely. For this purpose, the
R&S FSQ provides measurement routines that directly output the modulation depth
numerically in %.
Test setup:
Settings on the signal generator (e.g. R&S SMIQ):
Measurement with 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 MHz and span to 5 Hz.
➢
Press the
FREQ
key and enter
100 MHz
.
➢
Press the
SPAN
key and enter
5 kHz
.
Frequency:
100 MHz
Level:
-30 dBm
Modulation:
50% AM, 1 kHz AF
Signal
generator
R&S FSQ
Summary of Contents for FSQ series
Page 1: ...R S FSQ Signal Analyzer Quick Start Guide Quick Start Guide Test Measurement 1313 9652 62 02 ...
Page 28: ...R S FSQ 0 4 Quick Start Guide 1313 9652 62 02 ...
Page 50: ...R S FSQ Front and Rear Panel Rear Panel Connections 1 22 Quick Start Guide 1313 9652 62 02 ...
Page 110: ...R S FSQ Basic Operation Setting Parameters 4 12 Quick Start Guide 1313 9652 62 02 ...
Page 209: ...Quick Start Guide 1313 9652 62 02 R S FSQ Appendix Appendix ...
Page 210: ...Quick Start Guide 1313 9652 62 02 R S FSQ Appendix ...
Page 220: ...R S FSQ Appendix Installing Non Plug Play Printers A 10 Quick Start Guide 1313 9652 62 02 ...