HP 54645A, User'S And Service Manual

Page: 223 / 301

1
Check the rear panel
CALIBRATOR
output level.
If you are not sure how to check the
CALIBRATOR
, see "To check the output
of the
CALIBRATOR."
2
Load the default calibration factors.
a
Set the rear-panel CALIBRATION switch to the UNPROTECTED
position.
b
Press
Print/Utility
. Then press Service Menu and
Self Cal Menu
.
c
Press the
Load Defaults
softkey.
Vertical
self cal
3
After the message "Default scope calibration factors have been
loaded" is displayed on the lower side of the display, press
Vertical
.
4
Follow the instructions on the display, then press Continue
.
5
After the message "Press Continue to return to calibration menu"
appears on the display, press the
Continue
softkey
Delay self cal
for HP 54645A
Only 6
Connect a pulse generator set to 100 kHz and 1 V
p-p
, with a rise time
of less than 10 ns, to channels 1 and 2. Place the feedthrough at the
BNC tee. Make sure you use the HP 10502A cables to ensure equal
cable lengths.
7
Press the Delay
softkey, then follow the instructions on the display.
8
Set the rear-panel
CALIBRATION
switch to
PROTECTED
.
Delay self cal
for HP 54645D
Only
9
Connect channels A1 and A2 to the front-panel probe adjust signal
(5 V
p-p
, 1.2 kHz) using two 10:1 probes (HP 10074A). Connect the
ground leads on the 10:1 probes to the front-panel ground lug using
the banana ground plug (HP 1252-7310).
10
Connect digital channel D0 to the front-panel probe adjust signal
(5 V
p-p
, 1.2 kHz) using the 16-channel cable (HP 54620-61801).
Connect the ground lead of this cable to the front-panel ground lug.
11
Press the Delay softkey, then follow the instructions on the display.
12
Set the rear-panel
CALIBRATION
switch to
PROTECTED
.
Testing, Adjusting, and Troubleshooting
To perform the self-calibration
7-34