There are other reasons why the radio may generate a "beep." The main one is loss of bit-sync.
Every 21st frame has 0x55 0x2d 0x16 at the end - if you generate these at 20 or 22 frame intervals, sure enough, you get a beep. If you miss several, you get a beep. So, under weak conditions, you can hear more beeps as the radio struggles to re-sync the bit-stream. Spoken from coding experience of someone who has spent the last 12 months counting in 12 bytes x 21 frames :-) David --- In [email protected], "Neil" <barrym...@...> wrote: > > The beeps are generated (by the radio) when it 'thinks' the signal being > recieved has finished, like a 'clear to send' request. Due to our really > patchy coverage here in the UK, I experience many 'beeps' from the repeaters > stream, while it drops in and out of range, it has nothing to do with what > you are listening to, so same with simplex. > > Neil. > ----- Original Message ----- > From: "Nate Duehr" <n...@...> > To: "Justin G0KSC" <jus...@...> > Cc: <[email protected]> > Sent: Wednesday, October 14, 2009 3:15 PM > Subject: Re: [DSTAR_DIGITAL] Beeps > > > Technically this is also true. The beeps are just an indication that > signal has dropped, and a configurable feature on some of the rigs to > turn it off or change its volume level from the speaker. > > The information shown on the SCREEN however, is the actual > "notification" about what the system thinks is going on. > > > On Oct 14, 2009, at 8:00 AM, Justin G0KSC wrote: > > > > > I think you will find the bleeps are from your radio. The receiver > > bleeps to notify you a DV signal has dropped, not the repeater. Try > > a simplex QSO, this will confirm this for you. > > > > > > ----- Original Message ----- > > From: Robbie De Lise > > To: [email protected] > > Sent: Wednesday, October 14, 2009 2:52 PM > > Subject: Re: [DSTAR_DIGITAL] Beeps > > > > > > As I experience it i think something like this: > > > > No beep: The repeater did not confirm your TX, prolly no RX on the > > repeater side > > 1st beep: The repeater (CALL A, B or C) confirms your TX > > 2nd beep: The gateway (CALL G) confirms your TX. > > > > Ofcourse, when someone pushes the PTT right after the BEEP or before > > the BEEP, > > the repeater does not have the time to send the confirmation out. > > (The confirmations are send seperately from the DV transmission) > > > > so: > > > > DV TX > > stop TX > > Confirm Repeater TX (BEEP) > > stop TX > > Confirm Gateway TX (BEEP) > > stop TX > > > > if someone pushes the mike faster its like: > > > > DV TX > > stop TX > > Confirm Repeater TX (BEEP) > > stop TX > > DV TX > > stop TX > > Confirm Repeater TX (BEEP) > > stop TX > > Confirm Gateway TX (BEEP) > > stop TX > > > > or even: > > > > DV TX > > stop TX > > DV TX > > stop TX > > Confirm Repeater TX (BEEP) > > stop TX > > Confirm Gateway TX (BEEP) > > stop TX > > > > > > > > I could also be completely wrong :) > > > > Let me know if someone else has the same experience. > > > > 73s > > Robbie > > > > On Wed, Oct 14, 2009 at 3:42 PM, Fran Miele <f...@...> > > wrote: > > > > > > Several of the users on our system have been discussing the beeps > > heard on a repeater and it is clear we really don't understand them. > > > > > > I'm sure this has been asked many times before but I can't seem to > > find a definite answer. Can someone explain the beeps that are heard > > at the end of a transmission on a repeater? Sometimes there are two, > > sometimes one and sometimes none. > > > > > > What do they mean, and why the variation? > > > > > > Thanks in advance, > > > > > > Fran, W1FJM > > > > > > > > > > > > > > > > > > Nate Duehr > n...@... > > facebook.com/denverpilot > twitter.com/denverpilot > > > > ------------------------------------ > > Please TRIM your replies or set your email program not to include the > original message in reply unless needed for clarity. ThanksYahoo! Groups > Links >
