Chapter 4: Calibration
To run the self calibration
4–8
Figure 4-3
Calibration Dialog
4
Click Start, then follow the instructions on the screen.
The routine will ask you to do the following things in sequence:
a Disconnect everything from all inputs and Aux Out.
b Connect the shorting cap to each of the channel inputs, in turn.
c Connect the cal cable from Aux Out to channel 1.
You must use the recommended calibration cable for this procedure. Refer to the
Recommended Equipment table for the correct cable type. In particular, when calibrating
the 54855A, you must use the 54855-61620 cable assembly with two 54855-67604
adapters. Failure to use the appropriate cal cable will result in an inaccurate calibration.
d Decide if you wish to perform the Time Scale Calibration. Your choices are:
• Calibrate - Performs the time scale calibration. This option requires you to connect a 10
MHz reference signal to channel 1 that meets the following specifications. Failure to use
a reference signal that meets this specification will result in an inaccurate calibration.
• Skip - Time scale calibration will not be performed. Time scale calibration factors from
the previous time scale calibration will be used and the 10 MHz reference signal will not
be required. The remaining calibration procedure will continue.
• Defau lt - Factory time scale calibration factors will be used. The 10 MHz reference signal
will not be required. The remaining calibration procedure will continue.
e Connect the cal cable from Aux Out to each of the channel inputs and Aux Trig In, in turn.
f A Passed/Failed indication is displayed for each calibration section. If any section fails,
repeat the self-calibration procedure.
5
After the calibration procedure is completed, click Close.
Click here to start
calibration
Clear this check
box before starting
calibration
Frequency: 10MHz ±0.4ppm = 10MHz ±4Hz
Amplitude: 0.2Vpeak-to-peak to 5.0Vpeak-to-peak
Wave shape: Sine or Square
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