Napco, Caddx(GE), Bosch (Radionics) and Honeywell (Ademco)
Personally, I have Bosch. Flawless system. It's not just the transmitters
that are important, it's the receiver.
BTW, I have nearly 10 years in the security business as a sales engineer.
Its amazing to realize how big your electronic knowledge level is with
your 10 years to be an..
what did you say..
you are an engineer..
in radio communication
OR
in trench cutting, hammer and cleaning cloths?
Poor customers who have been advised by you.
One thing YOU are right with its the receiver.. better the received
signal who is important but when there is no valid signal due to an
external transmitters disturbing the received signal.. conclude.
Paul