[App_rpt-users] RTCM Question

[Chuck Henderson]

in voter.conf try setting
buflen = 200
and in the RTCM configuration try setting
7  - Tx Buffer Length (1200)
These settings work for me and reduce the latency.
I have less than 10ms of network latency between the RTCM and the server,
if you have more latency in your network then reducing these settings could
prevent your system from working correctly.  I found that I could reduce
the buflen to 120 but with that setting reliability suffered when there was
any extra network latency.  140 seemed to be reliable enough but I set it
to 200 just to be sure.
Chuck


On Tue, Jun 26, 2012 at 7:26 AM, Ken <ke2n at cs.com> wrote:

> I have seen this kind of thing between servers at the same location -
> without an RTCM - when something was causing some latency issues on my LAN.
> ****
>
> ** **
>
> in iax.conf I found the default resyncthreshold= was 1000 ms so I reduced
> it.****
>
> ** **
>
> I have since fixed the problem with the LAN, but still run resyncthreshold
> at 300 ms to avoid ever building up a lot of delay in the system.****
>
> ** **
>
> 73****
>
> Ken****
>
> ** **
>
> ** **
>
> *From:* app_rpt-users-bounces at ohnosec.org [mailto:
> app_rpt-users-bounces at ohnosec.org] *On Behalf Of *Alan Adamson
> *Sent:* Tuesday, June 26, 2012 7:55 AM
> *To:* app_rpt-users at ohnosec.org
> *Subject:* [App_rpt-users] RTCM Question****
>
> ** **
>
> Anyone else noticed this?  Maybe my user radio is just a fast switcher.***
> *
>
> I use and RTCM in conventional mode at my repeater to be the interface for
> it and Allstar.   If I don't remember to keep the PTT held for about a
> second after I finish talking, as soon as I release the PTT, I get about
> 1 second (it's actually a smidge shorter than that) of the last few things
> I said on the air.****
>
> I'm pretty sure this *repeat* is because of the approx 1 second delay that
> the RTCM instills in the system.  It's about 400ms of startup delay, and
> about the same of system delays, so the live release of the PTT sees approx
> 800ms of delayed audio.****
>
> If I remember to keep the PTT pressed for approx 1 second when I finish
> talking I don't see this.  I'm using a commercial radio, so maybe I'll need
> to see about a programmed setting to do that for me automagically.****
>
> Just wondering if others are seeing it as well or if I just have a fast
> switcher.****
>
> Alan****
>
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