[NHRC-user] New

[Doug Bade]

         It sounds like you may have 2 audio paths through the repeater 
enabled.

         Is this a repeater station with repeater control cards still in 
it? They need to be removed from "parallel" function if they are.. in 
general an echo would require some form of feedback loop or out of sync or 
redundant parallel audio path. I have seen this in a Mastr II station which 
still had audio cards ( even 2 or 4 wire audio) in it with a controller 
attached... ends up with 2 paths from the rx to the tx being "open" and 
only one under the control of the controller.

         In general all of the NHRC repeater controllers should be able to 
absolutely mute audio in its (their) realm other than the short burst which 
occurs before it is determined to be DTMF, which that case is supposed to 
be masked by the audio delay board. All NHRC controllers I have used to 
date block muted audio absolutely, if connected correctly..

         For what  it is worth, I have considered pulling the mute gate 
audio control off the controller and using it to control the Mastr II 
station audio gate circuit and use the factory Mastr II audio, as I have 
always found the factory audio path through its own boards to be superior 
to any audio processing done by ANY external controller, including all the 
commercial ones...Using the NHRC as a audio control gate, with cw/voice 
overlay on tx audio would yield the best of both worlds... This is 
especially true of Mastr IIe and Mastr III which have DSP audio 
processors... no offense to the NHRC folks, but in this case the factory 
does do it better.....BUT !!!!!!! the factory audio does still need to be 
controlled to mute things like DTMF..... a annoying twist... :-)

         Some very small mods to the controllers to allow this easily might 
make some of us commercial guys even start using them more in single tone 
commercial systems for customers, instead of just throwing in a cw id'er... 
This last couple lines are not real germane to the specific question, but 
more to the designers as a possible alternate option for interface. If 
there is author interest, I would be glad to detail my interest more 
concisely...if I did not explain it clearly...

         I have heard some statistics that something like over 50% of all 
amateur repeaters are Mastr II variants these days, that being said, as a 
target market, there are a couple nice "minor" adaptations in the 
interconnection which might be worth considering...as new optional 
connection methods.

I will be quiet now... :-)
73,
Doug
KB8GVQ


At 07:57 AM 07/22/2004, you wrote:
>That's where are problem is, we have a delay board installed, but are 
>still having all DTMF tone's being heard. Also we have an echo of our 
>audio transmissions just slight but still noticeable. This controller is 
>about to drive me nuts. I used others and not had this many problems. For 
>one thing the documentation of the controller could be a little more 
>concise, Sure appreciate any help here. I will have our tech. that is now 
>working on this unit join this group so that  he may give a more detail 
>description of our problem. I was sure suprised at the quick reply to my 
>question to the group.
>Thanks
>Frank
>----- Original Message -----
>From: <mailto:1gse at earthlink.net>.
>To: <mailto:nhrc-user at nhrc.net>NHRC User Community Mailing List
>Sent: Thursday, July 22, 2004 6:39 AM
>Subject: Re: [NHRC-user] New
>
>Frank
>
>If you are only getting partial muting of the first tone and full muting 
>of the rest of the tones a Audio Delay board will mute the first part of 
>the first tone.
>
>Brian
>
>Frank wrote:
>>Hello, the name here is Frank we are currently trying to get a new NHRC 
>>-10 controller installed in our clubs repeater system. In doing so the 
>>first problem we are having is we don't get complete muting of the DTMF 
>>tone, any help here.
>>Frank
>>
>>
>>
>>
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