Agilent Technologies E3646A, User Manual, Page: 69 / 211

Chapter 3 Front-Panel Operation and Features
Calibration Overview
69
3
To Secure Against Calibration
You can secure the power supply against calibration either from the front panel or
over the remote interface. The power supply is secured when shipped from the factory.
Be sure to read the security code rules on page 67 before attempting to secure the
power supply.
• Front-Panel Operation:
1 Select the calibration mode.
If the power supply is unsecured, the above message is displayed as you turn on the
power supply by holding down
(
Calibrate
) key and hold down the key until
you hear a long beep . And a message ‘‘ CAL MODE ’’ is displayed.
2 Enter the security code.
Enter the desired security code using the control knob and resolution selection keys.
3 Save the change and exit the menu.
The secured setting is stored in non-volatile memory, and does not change when power
has been off or after a power-on reset (
*RST
command).
• Remote Interface Operation:
CAL:SEC:STAT {OFF|ON},<code>
Secure or unsecure the power supply
To secure the power supply, send the above command with the same code as used
to unsecure. For example,
‘‘
CAL:SEC:STAT ON,
‘
003646
’’’ (E3646A model)
UNSECURED
000000
secured
Power
Calibrate
View
Calibrate
View
Secure
Config
I/O
Secure
Config
I/O
Power