Chapter 3 139
Manual Adjustment Procedures
7. 10 MHz Reference Adjustment — OCXO
7. Use a nonconductive adjustment tool to adjust the FREQ ADJ
control on the A21 OCXO for a frequency counter reading of 0.00 Hz.
8. On the 5334A/B frequency counter, select a 10-second gate time by
pressing
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).
9. Wait at least two gate periods for the frequency counter to stabilize,
then adjust the FREQ ADJ control on A21 OCXO for a stable
frequency counter reading of 0.000 Hz ±0.010 Hz.
10.Replace the dust-cap screw to A21 OCXO.
To Next Page
Loading...
