53220A/53230A Software Installation and Interface Configuration 2
Keysight 53220A/53230A User’s Guide 69
Firmware and Driver Updates
Firmware and driver updates (when available) for the 53220A/53230A are
available via the Web. This section contains information for locating and
downloading the updates to your computer, and then installing the updates in the
instrument.
Disabling calibration security
Before firmware updates can be installed, the counter’s calibration security
feature must be disabled. This done using the command:
CALibration:SECurity:STATe {OFF|ON}, <code>
CALibration:SECurity:STATe? (query form)
To unsecure the instrument, you must provide the security code in addition to
setting the state to OFF. The security code is set to KT53220A (Keysight 53220A)
or KT53230A (Keysight 53230A) when the instrument is shipped from the factory.
Note, however, the security code may have been changed once the counter has
been in use.
After the firmware update is complete, the counter can be re-secured by setting
the state to ON and providing the security code. The calibration count is
unaffected when changing the security state or by a firmware update.
The calibration count can be read with the command:
CALibration:COUNt?
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