Why version 13.1.2 have frequency 5.4 for PMP430SM but version 13.1.3 remove support frequency 5.4
I am not sure I understand this. For PMP 430, there are two different model numbers, one that supports 5.4 GHz (5470-5725 MHz), and one that supports 5.8 GHz (5725-5850 MHz).
The version of software running on these will not affect the ability to operate in various frequencies.
Yes - two different model numbers, one that supports 5.4 GHz (5470-5725 MHz), and one that supports 5.8 GHz (5725-5850 MHz) . But if on model 5725-5850 MHz installed version 13.1.2 in radio add frequency on (5470-5725 MHz) and model 5.7 good work on frequency 5.4
after installed version 13.1.3 frequency on 5.4 lose
The 5.7 radio is not legally authorized to run on 5.4 frequencies. The addition of those frequencies to the selection menu was an error that had been corrected in current software versions.
It is not recommended to use R13.1.2 (due to other bugs and open issues). It is highly recommended that PMP 430 run on R13.1.3 or R13.2.