Agilent Technologies Agilent 4396B - Manual (Page 78)

AM Signal Measurement
In this example , the following parameters for AM signal measurement
are derived:
Carrier amplitude (E c ) and frequency (f c )
Modulating frequency (f m ) and modulation index (m)
T est Signal The following test signal is used in this example:
AM Signal
Frequency (f c ): 100 MHz
Modulating signal frequency (f m ): 10 kHz
Modulation index (m): 15%
Measurement Setup
Connection
Connect the test signal source to the S input.
Analyzer Settings
Press 4 Preset 5 . Then set the analyzer's controls as follows:
Desired Settings K ey Strokes
A ctive Channel
Block
Select channel 1 4 Chan 1 5 (default)
Measurement
Block
Select Spectrum Analyzer Press 4 Meas 5
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
ANALYZER TYPE
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
SPECTRUM ANALYZER
Select S input 4 Meas 5
FFFFFFFFFFFFFFFFFFFFFFFFFF
SPECTRUM:S (default)
Sweep Block Center frequency 100 MHz Press 4 Center 5 100 4 M/ 5
Span frequency 200 kHz Press 4 Span 5 200 4 k/m 5
Carrier Amplitude and Frequency Measurement Using the Marker
Press 4 Scale Ref 5 and enter the reference value if the trace needs to be
rescaled.
1. Press 4 Search 5 to turn the marker on.
2.
Press
NNNNNNNNNNN
MAX to search for the carrier signal. The carrier amplitude
and frequency are displayed in the upper right corner as shown in
Figure 4-12.
4-10 Spectrum Measurement Examples