In public safety (EDACS) radios receive control information and there is a handshake between the radio to let the radio know it is OK to transmit. This avoids collisions. Each radio has a unique ID.
For DSTAR 2 simple fixes come to mind - no protocol change - just subscriber unit features. 1 - USE BCLO (busy channel lock out) Today that would be carrier squelch and most anything will make the channel look busy. The attenuator would help. Better yet - ICOM incorporate data carrier detect to sense whether the channel is busy. 2 - A random and SMART wait time before allowing TX. Smart being if there is no activity - fire away - if there is recent activity - pause X milliseconds before allowing TX and let the pause be random to help avoid collisions. Perfect solution - no way - simple remedy that would help somewhat - I do believe. As far as doubling goes - in FM the biggest guy captures the channel - there is no data associated with the call and no routing so there is no blocked transmission - just the nature of fm v digital. 73 nu5d On the mobile antenna for fixed use - be sure there is a ground plane - pizza plate on up. Also the signal may be overshooting you - sometimes a 1/4 wave will outperform a gain antenna. Keep cable lengths short and try to avoid adaptors. sb James Earl Wells wrote: > > > This sounds pretty good. My problem is that D-Star is not all that far > from me but I cannot talk on it while I am at my home. However I can > walk yes, walk less than a block and talk all day on it. Ham Radio Spoken Here !!! EM11ma - South Mountain, Texas
