[App_rpt-users] Squelch Tail Elimination

[Sam Nabkey]

You will need an audio delay board.  I've got the same issue at an analog
voted system.  I used this....
http://arsrepeaters.com/site/mobile?url=http%3A%2F%2Farsrepeaters.com%2FAudio_Delay_W462.php#2834

However, I have had great success with the built in squelch in the RTCM..
As good as Motorola.



On Mar 29, 2015 10:10 AM, "R. Wayne" <allstar at controlservers.net> wrote:

>   But as we said we are using a RTCM.
>
>  *From:* REDBUTTON_CTRL <jrorke at cogeco.ca>
> *Sent:* Sunday, March 29, 2015 5:09 AM
> *To:* app_rpt-users at ohnosec.org
> *Subject:* Re: [App_rpt-users] Squelch Tail Elimination
>
> The short answer is yes.
>
> What you need to do is bring out raw discriminator to the URI or USB fob.
> Then configure youfr node for USB radio to have
>
> Carrierfrom = dsp and ctcss from = dsp.
> you also need to set the rx demod to flat.
>
>
> [usbnode_num]
>
> hdwtype=0
> rxboost=1
> txboost=1
> rxctcssrelax=1
> txctcssdefault=131.8    ; default pl tone
> rxctcssfreqs=131.8    ;rx pl tone
> txctcssfreqs=131.8    ;tx pl tone if used
> ;rxctcssoverride=0
> carrierfrom=dsp    ;carrier squelch detection
> ctcssfrom=dsp    ; pl tone detection
> rxdemod=flat
> txprelim=yes
> txlimonly=no
> txtoctype=phase
> txmixa=voice
> txmixb=no
> invertptt=0
> duplex=0
> rxondelay=0
> rxnoisefiltype=0
> eeprom=0
>
>
> Save your settings and restart your Allstar node so the changes take
> affect.
> Do your audio calibrations.
>
> Then you will need to set the carrier squelch. Typically the default
> squelch setting in Allstar is below the threshold. So you will get squelch
> crashes.
>
> Do a "radio tune rxsquelch" at the cli with no signal at the receiver. It
> will return the current squelch setting and the current squelch level.
>
> *CLI> radio tune rxsquelch
> Current Signal Strength is 788
> Current Squelch setting is 500
>
> If the squelch level is below the signal strength then the carrier squelch
> is open.
> Set the squelch higher than the signal strength by about 80-100 points.
>
> *CLI> radio tune rxsquelch 820 <enter>
>
> Try the squelch. It should give you a "fast squelch" for signals that have
> 20 db quieting or better.
> then test the threshold and see how weak signal will open the squelch. You
> may have to tweak the squelch to liking.
>
> Once you have the squelch set correctly then save thew settings.
>
> *CLI> radio tune save.
>
> You should be good to go.
>
> Jon VA3RQ
>
>
>
>
>
>
>
>
> On 3/29/2015 1:33 AM, R. Wayne wrote:
>
>  After relocating our MSF 5000 to a new location and adjusting the
> squelch as low as we could reliably go we noticed that we have a squelch
> tail. Our coordination requires that we don’t. It appears that the MSF has
> a fixed squelch tail elimination method an no control other than cranking
> up the squelch again. This is surprising since we use PL encode / decode. I
> would think that the PL would mute as soon as the user unkeys.
>
> With this said is there anything in Allstar that would help with this
> situation?
>
> Wayne
>
>
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