HP 54522A - Page 200

PROBE CAL
time ult
- chennel
start cal
continue
scharinél imped—
3O% OC
abort
pmax test voltage
5.00000 V
Utility Menu
Attenuation Menu
Attenuation Menu
The attenuation menu calibrates the channel! gain to the tip of the probe on
high impedance probes. The oscilloscope calibrates to correct for channel
gain through probe attenuation down to a 0.9 attenuation factor.
Below 0.9 the message “attenuation less than 1, see manual for action" is
displayed. The corrective action is to perform a self-calibration on the
oscilloscope.
If the probe is not connected to the DC cal output connector on the rear
panel, the probe compensation connector on the front panel, or the probe
attenuation exceeds 250, the error message "attenuation too high or bad
connection" is displayed. The corrective action is to check the connections
and redo the probe calibration. If recalibration is unsuccessful, refer to the
Service Guide.
If the probe attenuation calibration is successful, the displayed message
“probe attenuation = n.nnnnn this value has been entered into your channel
probe setting" is displayed.
Probe Attenuation Calibration Error
Impedance Approximate error
100 kQ 0.5%
1 MQ 0.05%
10 MQ 0.005%
Channel Softkey
The channel softkey selects which channel] to calibrate.
Start Cal Softkey
The start cal softkey displays the instructions for the probe calibration.
Continue Softkey
The continue softkey actually begins the calibration process.
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