E F Johnson Company 2425372 Benutzerhandbuch

Section 9

There currently are 

four different firmware versions in use in 53xx radios (Does the four 

respond to Version 1.x/2.x/3.x/4.x or should we say one firmware version 4.6.x and 
above?

. Firmware is the Application code which controls the operation of the radio. It is 

not the standard personality information programmed by the PC Configure programming 
software.

Later firmware versions may provide some operating features that are not available in 
earlier versions.

Version 4.x radios use the SEM logic board that interfaces with the RF board used in these 
radios. The part number of this logic board is 023-5500-6xx. A UCM version of this board 
is not currently planned.

SEM Version - This version has the EFJohnson SEM (Security Encryption Module) 
soldered to the board. It is used whenever DES, DES-OFB, or AES encryption is required.

The radio/logic board version can be determined by noting the second version number that 
is briefly displayed when radio power is turned on. The first number indicates the control 
unit code version.