[arm-allstar] Tx A Level Setting

[Chris Souleles]

Doug,
Very short drop out.  It sometimes happens near the beginning or part way through.  It's very short, it misses just part of a word.  I have opened the squelch and that doesn't change it.  I've listened on a couple radios and it's the same on each.  I don't notice it when I'm talking with other stations, only when I listen to *81 or some command like that.  Later today I will try turning off RX PL and see what happens, but since it occurs at any point in the transmission this seems unlikely. 
By the way - the voltage divider tip on the audio you gave me worked great - that's what the FT-7900 needed to work correctly with the DMK URi.  I ended up with 220K and 4.7K so it needed to be dropped down quite a bit.  
Thanks,  Chris - W6CS - 73

      From: Doug Crompton <wa3dsp at gmail.com>
 To: Chris Souleles <csouleles at prodigy.net> 
Cc: ARM Allstar <arm-allstar at hamvoip.org>
 Sent: Monday, December 11, 2017 8:28 AM
 Subject: Re: [arm-allstar] Tx A Level Setting
   
Chris,
 Do you mean a drop out or cut off of the beginning of the audio? This could be caused by a slow opening PL on your handheld or RX radio. Try turning off RX PL  if you are using it or opening the squelch and see if it does it then.
73 Doug
WA3DSP
http://www.crompton.com/ hamradio


On Mon, Dec 11, 2017 at 11:24 AM, Chris Souleles <csouleles at prodigy.net> wrote:

Thanks Doug.  I've been using *81 as I adjjust it.  I've also listened to the WIN System through my local repeater and compared with my node and they are very close to the same level, so I guess I have it about right.  
The only thing I have noticed is that when I do *81 sometimes I get a short drop out of the audio.  Not sure if this is due to RF interference or something else.  I don't notice any drop out when I'm talking with other stations.
Chris - W6CS - 73


      From: Doug Crompton via arm-allstar <arm-allstar at hamvoip.org>
 To: ARM Allstar <arm-allstar at hamvoip.org> 
Cc: Doug Crompton <wa3dsp at gmail.com>
 Sent: Monday, December 11, 2017 8:15 AM
 Subject: Re: [arm-allstar] Tx A Level Setting
  
Chris,

 This is not terribly critical on a local node. If you were driving a
repeater or wide area node you would want it to be a little more precise.
The wider the deviation the louder the audio signal up to a point where it
goes out of the RX bandwidth and becomes distorted. I generally tell people
who do not have the equipment to adjust it to listen to a local repeater on
their radio and keeping the volume level constant tune to their node
output. The audio level should be about the same. Adjust if necessary. Also
keep in mind that the audio level of the signal you are listening to may
not be adjusted correctly at their end so you need to average this. You can
also use the ID or time outputs to do this adjustment - *80 or *81.


*73 Doug*

*WA3DSP*

*http://www.crompton.com/ hamradio <http://www.crompton.com/ hamradio>*



On Mon, Dec 11, 2017 at 10:32 AM, "Chris Souleles via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> What is the best way to determine correct setting for Tx A Level?  Now
> that I have added a voltage divider on the audio line between the FT7900
> and the DMK URi it has put it within the SW adjustment range, but I don't
> know how to determine the best setting.
> The Rx side is working well with Rx Level at 500, pre-emphasis on, Rx
> boost on and voice peaks just at 5Khz.
> The node is FT7900, DMK URi, RPI3.
> Thanks,  Chris - W6CS - 73
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