This test applies only to analyzers that are equipped with the high stability frequency reference, Option 1D5. If your analyzer does not have Option 1D5, perform 10 MHz Reference Frequency Accuracy instead.
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This test applies only to analyzers that are equipped with the high stability frequency reference, Option 1D5. If your analyzer does not have Option 1D5, perform 10 MHz Reference Frequency Accuracy 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.
A 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.
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Related specification: |
Frequency Reference: Warm-up (Option 1D5) |
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Related adjustment: |
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Equipment |
Recommended Model |
For ESA Models |
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Frequency Counter 1 |
53230A |
All |
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Frequency Standard 1 |
Microsemi 5071A-C002 |
All |
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Cable, BNC, 2 required |
8120-2582 |
All |
The 10 MHz reference 5 minute warm-up error is calculated using the following equation:
The 10 MHz reference 15 minute warm-up error is calculated using the following equation:
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