Agilent Technologies HP 3325B Manual de instrucciones descargar pdf (Pagina 133)

Chapter 2 Service

The Agilent 53181A Calibration Procedures

Assembly-Level Service Guide 2-35

To Calibrate the High Stability Timebase Option (Medium, High,

or Ultra-High)

NOTE Allow the Counter to warm up for approximately 24 hours before performing

this calibration. This calibration is unlikely to fail, unless the Counter is not warmed

up.

1 Connect the output of a 10 MHz house standard to Channel 1 of the Counter as

shown in Figure 2-7.

2 Press 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.

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

in the Counter display.

4 Press 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 24

hours), 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.

NOTE If the counter has been disconnected from line power for over 24 hours, it may take

up to 30 days for the daily aging rate to be re-attained.

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Agilent Technologies HP 3325B Manual de instrucciones Pagina 133