Agilent Technologies Agilent 4396B - Manual (Page 80)

FM Signal Measurement
This example describes how to derive the frequency deviation (1f p eak )
value .
T est Signal The following test signals are used in this example:
Wide band FM Signal
Carrier frequency: 100 MHz.
Modulating frequency: 1 kHz.
Frequency deviation: 1 MHz.
Narrow band FM Signal
Carrier frequency: 100 MHz.
Modulating frequency: 1 kHz.
Frequency deviation: 5 kHz.
Measurement Setup
Connection
Connect the test signal 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)
RBW 1 kHz 4 Rw/A vg 5 1 4 k/m 5
Sweep Block Center frequency 100 MHz Press 4 Center 5 100 4 M/ 5
Span frequency 5 MHz Press 4 Span 5 5 4 M/ 5
Frequency Deviation of Wide Band FM Signal
Press 4 Scale Ref 5 and enter reference value if the trace needs to be
rescaled.
Frequency Deviation
1. Press 4 Search 5
N NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SEARCH:PEAK .
2.
Press 4 Ma rk er 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1MODE MENU
NNNNNNNNNNNNNN
1MKR .
3.
Press 4 Search 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SEARCH:PEAK
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NEXT PEAK .
4-12 Spectrum Measurement Examples