Agilent Technologies 8590 Series Service Manual page 48

Making Adjustments
4. 10 MHz Precision Frequency Reference
9. Select a 10 second gate time by pressing the following frequency
10.Wait at least 2 gate periods for the frequency counter to settle, and
11.Replace the dust cap screw on the OCXO.
Figure 2-8 Oven Reference Adjustment Location
48
counter keys.
10,
GATE TIME, 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).
then adjust the FREQ ADJ control on the OCXO for a stable
frequency counter indication of 0.000 ±0.010 Hz.
Chapter 2