[arm-allstar] RTCM / voting

[David McGough]

Richard,

For RTCM's to work optimally, all the receivers MUST be as "symmetric" as 
possible, since the RTCM's perform voting based on RX S/N ratio as 
determined via flat audio coming from the RX. By adding link radios (i.e.: 
another TX/RX combo) in the signal path for only one site, I'm suspecting 
the "perceived" S/N from that site will be poorer than the other site, 
impairing the voter performance.  Another factor than might come into play 
is that the signal coming is from the extra TX/RX path will have 
additional delay. I don't know what impact that might have.

73, David KB4FXC



On Tue, 24 Jul 2018, "Richard Bateman via arm-allstar" wrote:

> Hi all,
> 
> Is there a way to use the RTCM and voting when I don't have a way to get an
> IP link to one of the sites? I can easily get a 70cm RF link to it, but I
> don't have the line of site needed to do an IP link between them and it's a
> mountain-top node.  The other two locations have IP and either can reach
> this site with a 70cm or even 220 link.
> 
> Richard
> KD7BBC
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