Specifications

Chapter 2 Service
The Agilent 53210A/53220A/53230A Calibration Procedures
108 Assembly-Level Service Guide
NOTE After completing a new calibration of the counter, be sure to
secure the stored calibration values by performing the procedure
in the section titled “To Lock The Counter Against Calibration” on
page 101.
Calibration Cycle
The Calibration Cycle for the Agilent 53210A, 53220A, and 53230A
Counters is 1-year. The counter should be calibrated at least once every 12
months to ensure specification accuracy.
Calibration String:
The Cal String on the Calibrate Information page is operator-modifiable
and can be used to remotely enter any current or historical
data/information up to 40 characters long. The string may include the
characters A-Z, 0-9, and special characters like @, #, *, etc.
The CAL STRing can be entered remotely as follows:
•Send CALibration:STRing “<string>” .
•(Example:) output <address> ; CAL:STR “last cal 8-15-2010”
• CALibration:STRing? reads the current cal string contents from the
counter:
– “last cal 8-15-2010”
Internal Reference Oscillator Calibration
1 First, run the counter Self-Test as described in“Performing The
Counter Self-Test” on page 159. A successful self-test procedure
verifies that the counter is operational and ready for calibration.
2 Unlock the counter by performing the procedure “To Unlock The
Counter For Calibration:” on page 103. Key sequence:
[Utility] / (Cal AutoCal) / enter <code> / (Unlock Cal)