HP 8560A Service Manual page 85

3. Press CjCTRL), REAR PANEL
10 MHz INT.
Note When the 10 MHz reference is set to
and warmed up. If the reference is set to 10 MHz EXT , set the reference to
10 MHz INT
4. Remove dust cap from A15U302, TCXO. The dust cap is toward the rear of the HP 8560A.
5. Adjust 10 MHz ADJ on A15U302 for a frequency counter reading of 300.000000 MHz
6. Replace the dustcap on A15U302.
12. 10 MHz Reference Adjustment (Non-Option 003 only)
, and ensure that the 10 MHz reference is set to
and allow 30 minutes for the TCXO to warm up.
, the TCXO is not operating
Adjustment Procedures 2-51