Jeff DePolo 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 > > How about this - record a clean D-Star transmission (not decoded, just the > "raw" output from an FM receiver) on a PC with a good sound card, then use > it to modulate the sig gen in your service monitor. Do desense test using a > lossy tee like you normally would, except instead of comparing 12 dB SINAD > points, you'd have to rely on listening to the repeated/decoded audio on > another radio to gauge performance. >
D-Star, likeP25, is true FSK, so one would need a sound card with direct DC coupling end-to-end. I've seen some that decode POCSAG and FLEX ok, so that would probably work.
