HP 53132A Assembly And Service Manual page 214

Chapter 6 Backdating
The HP 53131A Calibration Procedures
CHANGE 1 (Firmware Revisions 3317, 3335, 3402, 3427)
(Continued)
6 Disconnect the calibration setup.
This completes the TI QUIK? calibration procedures.
Depending on which timebase the Counter contains, proceed to the
following procedure "To Calibrate the Standard Timebase" or the
"To Calibrate the High Stability Timebase Option (Medium or High)"
procedure to calibrate the timebase.
To Calibrate the Standard Timebase
1 Connect the output of a 10 MHz house standard to Channel 1 of
the Counter as shown in Figure 2-4.
HP 53131A
Counter
Channel 1
Figure 2-4. Standard Timebase Calibration Setup
2 Cycle the POWER key to preset the Counter.
3 With an insulated tuning tool, turn the OSC Adjust potentiometer
(located on the rear chassis of the Counter) until the frequency
reading in the Counter display is 10.00000000 MHz ± 5 Hz.
The Counter will be calibrated to the house standard.
If you are not able to adjust the frequency correctly, refer to the
troubleshooting section in this chapter.
This completes the Standard Timebase Calibration procedure.
6-14
House Standard
10 MHz Reference
Assembly-Level Service Guide