To Calibrate The Firmware - HP 54520 Series Service Manual

CAUTION
Main Assembly
To calibrate the firmware
To calibrate the firmware
The firmware calibration uses signals generated in the instrument to calibrate channel
sensitivity, offsets, and trigger parameters.
Equipment Required
Equipment Critical Specifications Recommended
Model/Part
Cable BNC 50 02 36 inch HP 10503A
Cable (4) BNC 50 &2 9 inch (equal length) HP 105024
Adapter (3) BNC tee (m)(f){F) HP 1250-0781
Adapter BNC (f){f} HP 1250-0080
Calibration protection
The rear panel Calibration switch must be set to Unprotected for these procedures. If the entire
adjustment procedures are being performed, the switch was set to Unprotected in a previous
procedure.
The Firmware Calibration should only be done after the instrument has run for one half hour
at ambient temperature with the cover installed. Calibration of an instrument that has not
warmed up may result in performance test failure.
Self-Calibration
Default calibration factors must be loaded before starting self calibration. However, if you
have been doing a complete calibration procedure, defaults were loaded just before the pulse
response adjustment.
Calibration time
It will take 14 to 16 minutes to calibrate an individual vertical channel. If all channels are
calibrated at the same time (all is selected), the calibration time is considerably less than
calibrating all channels individually. Typically, calibration using all will calibrate the entire
vertical in about 25 minutes without any operator intervention. Calibrating the time and trigger
functions will take one or two additional minutes and requires a person to make cable
connections during the procedure.
Perform a key-down powerup by cycling the instrument power while holding down
any front-panel key.
The display will prompt you to press any key (other than the shift key) to continue with a
normal key-down powerup.
If you have not done so, set the Calibration protect switch on the rear panel to
Unprotected.
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