48 Chapter2
Making Adjustments
4. 10 MHz Precision Frequency Reference
9. Select a 10 second gate time by pressing the following frequency
counter keys.
GATE TIME, 10, GATE TIME
The frequency counter should now display the difference between
the frequency of the INPUT A signal and 10.0 MHz with a resolution
of 0.001 Hz (1 MHz).
10.Wait at least 2 gate periods for the frequency counter to settle, and
then adjust the FREQ ADJ control on the OCXO for a stable
frequency counter indication of 0.000 ±0.010 Hz.
11.Replace the dust cap screw on the OCXO.
Figure 2-8 Oven Reference Adjustment Location
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