Yeah that is a good question. All we do is test from a portable a few miles from the repeater. Low power settings on TX for the portable.
Test with the amp inline and the amp out of the equation. I find very quickly there is something wrong. That's all I can do, I can't vary the output power. I can also test by just dropping the 25 watts to 5 watts on the repeater when a user is on the fringe of the system. If he starts to garble with his audio, I can drop the switch to 5 watts and bang, he's made it in the system clear as a bell. If I throw the switch back to 25 watts, he garbles again. --- In [email protected], Joe <k1ike_m...@...> wrote: > > This leads me to a question that I have had on my mind. How are people > doing desense testing with D-Star systems? (Remember, it's digital.) > > 73, Joe, K1ike > > Eric Lemmon wrote: > > Aaron, > > > > My CommShop for Windows program suggests that about 88 dB of isolation is > > needed for a 20 watt repeater, assuming 0.2 uV sensitivity on the receiver- > > which you didn't specify. >
