At 09:47 PM 08/26/08, you wrote: >At 8/26/2008 21:14, you wrote: > >Thanks for the reply Eric, > > > >First, it's that dam, loud BEEP when the PTT is pressed and Pre is > >programmed. > >So THAT'S what I hear coming from the FD/PD radios inside the Comm. tent at >the marathon. Yeah it's annoying alright, & I can't even hear what's >coming out of the radios from where I sit. But I sure hear that tone at >the beginning of each transmission. > >If they'd just use 1/2 second or so of audio delay on the TX audio, they >could stick the data burst in front of the audio without losing anything. > >Bob NO6B
Bob - listen to Glendora City PD Dispatch on 154.845 - whoever set up that system did a nice job. It's a highband repeater with MDC mute, so the other radios never hear any more than a very slight "tink" at the front of a carrier, yet the MDC data appears on the dispatcher display. MDC is a two-tone AFSK system. Mark and space tones are 1200 Hz and 1800 Hz. The unit ID is limited to 4 digits. More info at <http://en.wikipedia.org/wiki/MDC-1200> Mike WA6ILQ
