Rohde & Schwarz 1321.0615.02, User Manual

Page: 249 / 581

Modulation Analysis
R&S
®
Spectrum Rider FPH
242 User Manual 1321.1011.02 ─ 11
1. Press [MEAS] key.
The R&S Spectrum Rider opens the analog modulation menu.
2. Select the analog modulation domain you require ("AM Domain" or "FM Domain")
and the required measurement setting ("Mod. Trace" or "Mod. Summary") softkey
to perform the measurement.
See index 9 of
Figure 10-1 .
10.1.3.2 Defining the Horizontal Axis
The frequency defines the carrier frequency of the modulated signals.
Carrier Frequency
For more information, see Chapter 6.2.2.1, "Defining the Center Frequency" ,
on page 174.
Carrier Frequency Step Size
For more information, see Chapter 6.2.2.2, "Defining a Frequency Step Size" ,
on page 174.
10.1.3.3 Defining the Vertical Axis
Reference Level
For more information, see Chapter 6.2.3.1, "Setting the Reference Level" ,
on page 177.
Modulation Depth
The vertical axis of the AM Domain displays the modulation depth of the amplitude
modulated signal.
1. Press [MEAS] key.
2. Select "AM Domain" softkey
3. Press [AMPT] key
4. Select "Dev per Division" softkey.
A drop-down menu to select the step interval on the modulation depth opens.
5. Select the step interval on the modulation depth you require.
Frequency Deviation
The vertical axis of the FM Domain displays the frequency deviation of the frequency
modulated signal.
1. Press [MEAS] key.
Analog Demodulation
www.allice.de Allice Messtechnik GmbH