Calibration Procedures 1
Keysight U3606B Service Guide 71
9 Unsecure the instrument with the default security code “ATU3606B”. (Use
“3606” if you are unsecuring the instrument from the front panel.)
10 You can now enter a new security code if you wish. See “Changing the
calibration security code” on page 68. Be sure you record the new security
code.
Never calibrate the instrument while the case is open. Reassemble the
instrument before performing any calibration procedures.