Agilent Technologies L4400 - Manual (Page 264)

252 L4400 User’s Guide
A L4451A and L4452A Calibration Procedures
Calibration Process
The following general procedure is the recommended method to complete
a full instrument calibration.
1 See “L4451A and L4452A Performance Test Considerations.”
2 Perform the verification tests to characterize the instrument (incoming
data).
3 Unsecure the instrument for calibration ( “Calibration Security" on
page 250).
4 Perform the DAC adjustment procedures on either the L4451A or
L4452A.
5 Secure the instrument against unauthorized calibration.
6 Note the security code and calibration count in the instrument’s
maintenance records.
Aborting a Calibration in Progress
Sometimes it may be necessary to abort a calibration after the procedure
has been initiated. You can abort a calibration at any time by turning off
the power. You can also abort the calibration by sending the device clear
message or the CALibration:ABORt command.
C A U T I O N
If you abort a calibration in progress by cycling power when the
instrument is attempting to write new calibration constants to EEPROM,
you may lose all calibration constants for the function. Typically, upon
re-applying power, the instrument will report error 705 Cal:Aborted.
You may also generate errors 740 through 746. If this occurs, you
should not use the instrument until a complete re-adjustment has been
performed.