[App_rpt-users] VOTER transmit phase management

[Jim Duuuude]

Well, yes, in a simulcast system, the transmitting equipment must be effectively
IDENTICAL (same equipment carefully adjusted accordingly).

However, I'm not sure why you are attempting this, as the Voter Board/RTCM as it currently
is released/shipped does not properly support phase-coherent simulcast. Its 
software does (well, is capable of, if enabled). Its hardware does not.

Date: Mon, 14 Jul 2014 11:08:13 +1200
Subject: Re: [App_rpt-users] VOTER transmit phase management
From: stevewrightnz at gmail.com
To: telesistant at hotmail.com

Yes.  I suppose RX is little different, but I wondered to what extent transmit phase was critical, and how it might be worked around by inserting some phase pre-correction phasing line might be inserted in the feedline, or at the simplest - varying feedline length.




On Mon, Jul 14, 2014 at 11:05 AM, Jim Duuuude <telesistant at hotmail.com> wrote:




Are you talking about simulcast transmit?

Jim, WB6NIL

Date: Mon, 14 Jul 2014 10:34:12 +1200
From: stevewrightnz at gmail.com

To: app_rpt-users at ohnosec.org
Subject: [App_rpt-users] VOTER transmit phase management

On RTCM/VOTER systems, does the transmit audio and/or RF phase have to be "fiddled" to manage varying types of hardware?  I read somewhere that the RF gear should be similar or identical to minimise timing issues.


Can someone shed some light on this?


regards,Steve ZL1BHD


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