2Service
120 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Figure 2-4 Information screen
If any number less than 01.08 is displayed as the number before the first dash in
the ‘Firmware:’ version, then refer to Chapter 6, "Backdating", for any possible
changes to these calibration procedures for other firmware versions.
If the counter’s firmware version is equal to or higher than 01.08, then perform
the procedures in this section.
If Option 106 “6 GHz Microwave Input” is installed in your counter and the “FW
Rev” is (27.0), refer to “Procedure Changes” on page 264 for information
concerning the calibration procedure for your counter.
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 114.
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