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Chapter 2 45
Performance Verification Tests
2. 10 MHz High-Stability Frequency Reference Output Accuracy: Agilent E4401B, E4402B,
E4404B, E4405B, and E4407B (Option 1D5)
2. 10 MHz High-Stability Frequency Reference
Output Accuracy: Agilent E4401B, E4402B,
E4404B, E4405B, and E4407B (Option 1D5)
This test applies only to analyzers equipped with the high-stability
frequency reference, Option 1D5. If your analyzer does not have Option
1D5, perform the “10 MHz Reference Output Accuracy” test instead.
This test measures the warmup characteristics of the 10 MHz reference
oscillator. The ability of the 10 MHz oscillator to meet its warmup
characteristics gives a high level of confidence that it will also meet its
yearly aging specification.
The universal counter is connected to the 10 MHz REF OUT. After the
analyzer has been allowed to cool for at least 60 minutes, the analyzer
is powered on. A frequency measurement is made five minutes after
power is applied and the frequency is recorded. Another frequency
measurement is made 10 minutes later (15 minutes after power is
applied) and the frequency is recorded. A final frequency measurement
is made 60 minutes after power is applied. The difference between each
of the first two frequency measurements and the last frequency
measurement is calculated and recorded.
The related adjustment for this performance verification test is the
“10 MHz Reference Frequency Adjustment.”
Equipment Required
❏ Universal counter (Instructions are for Agilent 53132A. For Agilent
5316B, refer to its user documentation.)
❏ Frequency standard
❏ Cable, BNC, 122-cm (48-in) (2 required)
Figure 2-2 Frequency Reference Test Setup