Analog Modulation
R&S
®
Spectrum Rider FPH
220
User Manual 1321.1011.02 ─ 06.00
10
Analog Modulation
R&S Spectrum Rider option
R&S FPH-K7 (order number: 1321.0696.02) option is required to operate the R&S
Spectrum Rider in the analog modulation mode.
The Analog Modulation measurement analyzes the AM or FM modulated signals and
calculates the
using the measurement results. Note that
the measurement works properly only if you apply an amplitude or frequency modula-
ted signal. The firmware option R&S FPH-K7 provides the necessary measurement
functions to analyze amplitude and frequency modulated signals.
The digital signal processing in the R&S Spectrum Rider is used for demodulating
amplitude and frequency modulated signals.
By sampling (digitization) already at the IF and digital down-conversion to the base-
band (I/Q), the demodulator achieves maximum accuracy and temperature stability.
There is no evidence of typical errors of an analog down-conversion and demodulation
like AM to FM conversion and vice versa, deviation error, frequency response or fre-
quency drift at DC coupling.
1. Press [MODE] key.
The R&S Spectrum Rider opens the mode menu.
2. Select the "Analog Demod" softkey
The R&S Spectrum Rider activates the mode for analog modulation.
See index 1 of
.
3. Press the [MEAS] key.
The R&S Spectrum Rider opens the analog modulation measurement menu.
The measurements are performed in two analog modulation domains: "AM
Domain" or "FM Domain" and the measurement readings are available in two dif-
ferent selections: "Mod Trace" and "Mod Summary".
4. Select the analog modulation domain you require and measurement selection to
view the measurement readings.
The R&S Spectrum Rider displays the respective analog modulation measurement.
See examples in
