Stephen, Yes, eliminating the Repeater TX hang time, one way or another, is the best solution....I'm not sure what kind of controllers you've got?? One possibility would be to have a Repeater transmitted PL tone directly follow the Repeater COS....Then, the simplex link radios would look for that PL tone. If the Repeater's RX COS isn't active, no PL tone transmitted, and no ping-pong. Then, you could still have a Repeater generated TX carrier hang time. The problem with rxondelay is that it'll force users to slow down their chatter, since the first parts of words during the delay period will get chopped off. If TX hang times are long, the rxondelay will be long...Not ideal. 73, David KB4FXC On Fri, 26 Aug 2016, Stephen - K1LNX wrote:
David, Yes, this is the exact scenario. I think it can be solved by eliminating the hangtime from propagating across the hub alltogether, but not sure what the best approach is.
Thanks, Stephen K1LNX
On Fri, Aug 26, 2016 at 6:58 AM, David McGough <kb4fxc@inttek.net> wrote:
Hi Stephen,
I guess, in your scenario, the ping-pong is generated from repeater TX hang times? So, something like:
1) User keys up "Repeater A" directly.
2) Simplex AllStar link "Radio 1" hears "Repeater A" TX audio and/or hang time and repeats to the hub.
3) Simple AllStar link "Radio 2" connected to same hub keys and brings up "Repeater B"
4) "Repeater A" unkeys, "Radio 1" COS goes inactive, "Radio 2" unkeys.
5) "Radio 2" hears "Repeater B" TX audio and/or hang time, keys hub, "Radio 1" and "Repeater A".
6) "Repeater B" unkeys, "Radio 2" COS goes inactive, "Radio 1" unkeys.
7) Goto 2 and repeat forever
73, David KB4FXC
On Fri, 26 Aug 2016, Stephen - K1LNX wrote:
Hi guys... I am in the midst of deploying a 5 site system. All of the sites with the exception of my own will be using link radios sitting on the repeater pair, some sites do not have internet access so this is the only option. Each node will be permalinked to our hub.
What we discovered when we brought site number 3 online was the dreaded "ping-pong" effect, and I did some digging and found out about the rxondelay parameter, that seems to be the place to start with this.
The other option we are considering is dropping the hang time off each repeater and using app_rpt to do hang time and courtesy tones instead (duplex = 1 instead of 0) but not sure that would work real well or be optimal.
Anyone have any experience with a setup like this that can offer some advice? This is my first foray into this unfortunately, I've always just interfaced the radio or repeater directly to app_rpt in the past or through a controller so it's been a bit of a challenge.
73 Stephen K1LNX