6Backdating
266 Keysight 53210A/53220A/53230A Assembly Level Service Guide
7 Press the Cal / AutoCal softkey to display the calibrate options.
– 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 Keysight
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.
8 If “Unlock Cal” is displayed on a softkey, the counter is locked against
calibration. (See step 2.)
9 If “Lock Cal” is displayed on a softkey, the counter is unlocked and ready for
calibration.
–The Perform Cal softkey becomes available.
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