Specifications

Chapter 2 Service
The Agilent 53210A/53220A/53230A Calibration Procedures
Assembly-Level Service Guide 131
• Display shows:
– Cal Count shows the total number of times: (1) a successful
calibration step has been completed; (2) calibration data is
downloaded; (3) the Cal String or Secure Code is updated; (4) the
counter firmware is updated. It is not operator-modifiable and
rolls over at (2
32
-1). Since the unit is calibrated several times
during manufacture, the Cal Count will not be zero when shipped.
– Cal String shows the current calibration string. This string is
operator-modifiable, used to record such information as the date of
the last calibration, or by whom it was performed. The Calibration
String can not be entered from the front panel keys. It can only be
entered/updated using the remote SCPI command: CALibration
STRing. Refer to the Agilent 53210A/53220A/53230A SCPI
Programmer’s Reference for details of the command format.
– Secure Code displays either all dashes ( --- ) or an operator-
entered security code that has not yet been accepted by the
counter.
9 If “Unlock Cal” is displayed on a softkey, the counter is locked
against calibration. (See step 2.)
10 If “Lock Cal” is displayed on a softkey, the counter is unlocked
and ready for calibration.
•The Perform Cal softkey becomes available.
11 Press the Perform Cal softkey: