[capediablo83]

Ok... anche se probabilmente a pochi interessa... giusto per dovere di cronaca riporto la risposta ottenuta da un utente di rcgroups.

"They are used to generate fixed high or low modulation (by plugging a jumper into one side or the other) while adjusting the trim pots (P101, P102) which set the FM frequency deviation. The 'utility' is that you can use it to check and/or fine-tune the frequency of your transmitter."