[App_rpt-users] Squelch Tail Crash Elimination

Steve Mahler kizzy at lusfiber.net
Wed Jun 6 14:41:07 UTC 2018 

Are you using AllStar to generate the TX PL tone??  If so, there is a 
setting to turn the PL off before the TX.  If the user radio has a PL 
decode set and the it responds quickly, the user radio will mute before 
the repeater TX drops. (Seems to work here, YMMV).


txtoctype = notone      ; Transmit tone control type: no,phase,notone
                         ; no - CTCSS tone encoding with no hang time
                         ; phase - encode CTCSS and reverse phase
                         ; AKA ("reverse burst") before unkeying TX
                         ; notone - encode CTCSS and stop sending tone 
before unkeying TX
                         ; AKA ("chicken burst")

...STeve - KF5VH


On 6/6/2018 9:24 AM, ARS W5OMR wrote:
> Using the channel driver usbradio, did you run radio-tune-menu and 
> adjust the squelch?
> It sounds to me, like the squelch is wide open, and you're using 
> usbradio.conf to define the pl tone(s).  If your squelch is wide open, 
> you will hear that bit of squelch crash after the tone is dropped, and 
> before the repeater drops.
>
> There are 2 ways to go on the settings, and I don't remember which is 
> which so there's a 50/50 shot at this... but "as I recall" (and I'm 
> not remembering well, these days) the Lower the number, the 'looser' 
> the squelch.
>
> For experimentation, you might try turning the tone requirement for 
> the receiver off, and adjusting that value, while listening to the 
> output of the repeater (while not hooked up to anyone) and determine 
> where the squelch level should be.
>
> best of luck es 73
> -Geoff/W5OMR (29655)
>
> On Wed, Jun 6, 2018 at 5:37 AM, John W Benedict <John at ke5rs.com 
> <mailto:John at ke5rs.com>> wrote:
>
>     Thank you Chuck and Mike,
>
>     Chuck,
>
>     Yes… I thought USBRadio with more complexity, not simple would be
>     what was needed… I am using pin 9 now from the 15 pin and going to
>     pin 21 at the URIx.  I will look at what you show below and see if
>     that is the direction to go.  As you described “Best results”, I
>     will check into grabbing the discriminator audio being a little
>     nervous  with my skill set 😊
>
>     Thank you.
>
>     Mike,
>
>     I did play some with the “rxondelay” but with no luck.  What I
>     remember, adding time to “rxondelay “ gave me a short burst of
>     initial audio out the front speaker with more time getting a
>     longer audio burst before it gets muted.  This audio burst would
>     only happen if the squelch tale drops completely from the previous
>     transmission.  I did not hear a difference with what was heard on
>     the air from the transmitter including the squelch crash was still
>     present.
>
>     Thank you for your reply…
>
>     John de KE5RS
>     _._ . ..... ._. ...
>
>     *From:* App_rpt-users <app_rpt-users-bounces at lists.allstarlink.org
>     <mailto:app_rpt-users-bounces at lists.allstarlink.org>> *On Behalf
>     Of *Chuck Henderson
>     *Sent:* Tuesday, June 5, 2018 10:45 PM
>     *To:* Users of Asterisk app_rpt
>     <app_rpt-users at lists.allstarlink.org
>     <mailto:app_rpt-users at lists.allstarlink.org>>
>     *Subject:* Re: [App_rpt-users] Squelch Tail Crash Elimination
>
>     I think that if you feed direct discriminator audio to the usb
>     interface and use usbradio then it automatically takes care of the
>     necessary delays and avoids loosing any audio in the process.  For
>     best results you can grab the direct discriminator audio from the
>     cable that runs from inside the Receiver Unit to the Filter Unit
>     (shown below), I can't remember if I used the L-in or the R-in. 
>     Or second best you can use the DSP processed discriminator output
>     in the DB15 connector (center pin in center row, pin 8) but it
>     isn't as good and has more delay.
>
>     ​
>
>     On Tue, Jun 5, 2018 at 9:41 PM, Mike <mm at midnighteng.com
>     <mailto:mm at midnighteng.com>> wrote:
>
>         Well, I don't want to lead you astray... as I'm not for sure
>         on this...
>
>         Had to think on it a while...
>
>         You might try adding some time to rxondelay (ms)  but I'm not
>         sure that will delay the repeated audio.
>
>         I think it may only delay the cor activation time.
>
>         But, if nobody chimes in with the 'right stuff' give it a try.
>
>         I'm thinkin you might need to create a special audio delay.
>
>         73,
>
>         ...mike/kb8jnm
>
>         On 6/5/2018 10:10 PM, John W Benedict wrote:
>
>             Hello,
>
>             I have ASL running a Dell Slim Form computer all seems to
>             be work quite well, connections, Echolink and local
>             repeater with great audio reports however… I like to know
>             how to eliminate the squelch crash on the tail maybe
>             adding some milliseconds to the receiver audio?
>
>             The system is a Yaesu DR-1X interfaced with the URIx
>             controller using SimpleUSB in ASL version 20180417
>
>             The computer: Dell SFF Version 4.9.0-6-amd64 #1 SMP Debian
>             4.9.88-1+deb9u1 (2018-05-07) x86_64.
>
>             I am very novice with Linux and Asterisk but learning bits
>             and pieces…
>
>             Thank you
>
>             John de KE5RS
>             _._ . ..... ._. ...
>
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> -- 
> Operating your AM rig without a scope is like driving our car at night 
> without headlights. (~K4KYV)
>
> 73 = Best Regards,
> -Geoff/W5OMR
>
>
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