Agilent Technologies 83620A, Service Manual

Page: 104 / 687

6. Maximum Lev eled P o w er
Note
This p erformance test is not v alid unless the syn thesizer meets
b oth its p o w er accuracy and p o w er atness sp ecications.
P erform those tests rst.
Description and Procedure
The unlev eled status indicator is display ed when the instrumen t is unlev eled
as the syn thesizer sw eeps o v er sp ecic frequency ranges in fast con tinuous
sw eep, and fast and slow single sw eep op eration. Because of the syn thesizer's
p o w er accuracy and atness p erformance, a p o w er meter is not required for
this measuremen t. The following pro cedure tests the most likely w orst case
situations for maximum lev eled p o w er.
1. Set up and turn on the equipmen t sho wn in Figure 2-7 . Preset the
syn thesizer and let it w arm up for at least one hour.
Note
The 20 dB attenuator pro vides a go o d match on the RF
output. If the syn thesizer has a step attenuator, y ou can
simulate a go o d match b y decoupling the step attenuator from
the ALC and setting the attenuator to 20 dB.
Figure 2-7. Maximum Lev eled P o w er T est Setup
Equipment
A tten uator 20 dB HP 8490D Option 020 (HP 83640A/50A)
A tten uator 20 dB HP 8493C Option 020 (HP 83620A/22A/23A/24A/30A)
2-34 P erformance T ests
Maximum Lev eled P o w er
HP 8360
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