It is very doubtful if it is possible change the operating band limits for 5MHz.
Allocations and modes are programmed into the CPU chip memory at manufacture
for the various markets and areas of use.
The control board is simply programmed by links which initiates the
appropriate pre-written data to meet the known authorised operating limits
in the various world markets. This is done from official data received at
the manufacturer.
These parameters form part of the type approval tests and are so are not
able to be re-written AFAIK.
It is unlikely that there is any route into the internal programming of the
CPU chip itself.
The firmware updates we are familiar with go into the DSP memory or separate
memory on the control board.
The control board is simply programmed by links which initiates the
appropriate pre-written data to meet the known authorised operating limits
in the various world markets. This is done from official data received at
the manufacturer.
These parameters form part of the type approval tests and are so are not
able to be re-written AFAIK.
It is unlikely that there is any route into the internal programming of the
CPU chip itself.
The firmware updates we are familiar with go into the DSP memory or separate
memory on the control board.
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