Chapter 6 Backdating

The HP 53131A Calibration Procedures

 

CHANGE 1 (Firmware Revisions 3317, 3335, 3402, 3427)

 

(Continued)

 

To Calibrate the High Stability Timebase Option

 

(Medium or High)

 

Allow the Counter to warm up for approximately 30 minutes

NOTE

 

before performing this calibration. This calibration is unlikely to fail,

 

unless the Counter is not warmed up.

1Connect the output of a 10 MHz house standard to Channel 1 of the Counter as shown in Figure 2-4.

2Press any one of the arrow keys until CAL: TIMEBAS? is displayed.

Note that the timebase choice (CAL: TIMEBAS?) only appears when the Timebase Option is installed.

3Press Enter key and follow the instructions in the scrolling message that appears in the Counter display.

4Press Enter key after each instruction.

The Counter displays CALIBRATING, and then it should display

TB CAL PASS.

If the fail message is displayed (even after the Counter has been warmed up for 30 minutes), refer to the troubleshooting section in this chapter.

This completes the High Stability Timebase Option Calibration procedure. If all tests passed, the Counter is now calibrated.

6

Assembly-Level Service Guide

6-15