Problem GM1200

[denis]

small infomation
which to already succeeded in modifying the bandwidth of a GM1200
I explain itself I have a model M01KHL9CK4AN (thus 146-174)
but it is into 136-174 in tx and 146-174 in RX not practises for my
relay and I do not find anything in the software, I precisse why I thus
use it in conv mode (10cnx for a relay it is good) if you have an idea
or a solution (not of flashage)

i would like to use this in 136-174 Mhz in RX and TX to make a relais

thank you