90 34405A User’s and Service Guide
4 Performance Tests and Calibration
Calibration Process 
The following general procedure is the recommended method 
to complete a full instrument calibration. 
1 Read  “Test Considerations” on page 71. 
2 Perform the verification tests to characterize the 
instrument (incoming data). 
3 Unsecure the instrument for calibration (see “Calibration 
Security” on page 87). Once unsecured, the instrument 
will be in Adjustment Mode as indicated by the 
illuminated CAL annunciator.
4 Perform the adjustment procedures (see “Adjustments” on 
page 93). 
5 Secure the instrument against calibration. 
6 Note the new security code and calibration count in the 
instrument's maintenance records.
NOTE
Make sure to quit the Adjustment Mode then turn off the instrument.
34405A users guide.book  Page 90  Saturday, September 2, 2006  3:38 PM