84
34405A User’s and Service Guide
4
Performance Tests and Calibration
Example 3
Assume the calibration security code has been set to
ATB1
through remote
interface. The first two characters (AT) are ignored. The B is represented
by a zero. The “1” is still used and trailing zeros fill in the remaining
characters. Use this code to unsecure:
01000
To Unsecure the Instrument from the Front Panel
1
Press
and
simultaneously to enter the Calibration
Security Code entry mode.
2
The primary display shows
SECur
and the secondary display shows
_ _
_ _
.
3
Use the editing keys
to step to each character
in the code.
Use the range keys
to select each character.
4
Press
(Enter) when done.
5
If the correct security code was entered, the
CAL
annunciator
illuminates and the primary display briefly shows
PASS
.
Shift
DCV
Store
Recall
Store
Recall
Limit
Edit
Range
Disp
Enter
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