![]() Some changes may have to be made in other files. This revelation often doesn't happen until after you've read the radio's code plug, and the program tries to find the model number in the MDF file but won't due to the checksum mis-match. It then compares that total with a known value stored in the program if the two don't match, the software will complain and usually not let you proceed any further. In addition, the program reads the MDF file and adds all the byte values together, a process called "generating a checksum". These files are usually small and version-dependent, so you can not take an MDF file from R01 software and expect it to work with R04 software. The modifications often take place in a Model Definition File, a file with the MDF extension. For example, GTX software only allow 10 conventional modes, but the hardware is capable of at least 15. The two major reasons are to allow entry of amateur frequencies and to increase the number of available channels/modes. ![]() ![]() People often hex-edit their programming software. Modifying Programming Software - Benefits and Pitfalls ![]()
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