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Document Part No. E5500-90024Ed. 1.0
Procedure
1
Connect circuit as shown in
connections. If the Agilent 70420A Option 001 or Agilent 70427A
is available, use one of the connection diagrams described in
Noise Measurement Block Diagrams"
Figure 12-14Double-sided Spur AM Noise Measurement Setup Method 1,
Example 2
2
Measure the power which will be applied to the AM detector
(Figure
12-15). It must be between 0 and +23 dBm.
Figure 12-15Measuring Power at the AM Detector
3
Using a source with AM, set its output power equal to the power
measured in step 2. The source should be adjusted such that the
sidebands are between –30 and –60 dB below the carrier with a
modulation rate between 10 Hz and 20 MHz.
NOTE:
The carrier-to-sideband ratio
æ
percentAM
ö
C
----------------------------- -
---- -
=
20
log
è
ø
100
sb
E5500 Phase Noise Measurement System Version A.02.00
AM Noise Measurement Fundamentals
Method 2: Double-Sided Spur
Figure
12-14, and tighten all
on page 12-3.
C
for AM is:
-----
sb
=
6dB
12
"AM
12-17
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