It can be made to cover up any tail that the repeater is repeating, but the real reason for it is to help you eliminate the tail that your *own* radio is generating when the repeater carrier drops.

73

Ken

From: Shane Morris [mailto:edgecomberts@gmail.com]
Sent: Sunday, February 17, 2013 12:29 PM
To: Ken
Cc: Thomas Delmonego; app_rpt mailing list
Subject: Re: [App_rpt-users] Avoid squelch noise after receiving a signal

So, you're saying the tail is still there, but you don't hear it because Asterisk stops transmitting the CTCSS tone just before the tail starts, meaning the receiving radios actually "don't" hear it?

Interesting way of looking at the issue, thats for sure...!

On 18/02/2013 4:26 AM, "Ken" <ke2n@cs.com> wrote:

Ciao Thomas

The squelch “tail” is usually eliminated by using CTCSS (so called PL) on the transmitted signal and corresponding PL detection on receive.  I am not sure how common that is in EU though …

On the repeater you need (usbradio.conf)

txtoctype=notone

With this, Asterisk stops transmitting the CTCSS tone about 600 milliseconds before dropping the carrier – radios that are using tone squelch will not hear any noise at all when the other station stops transmitting. 

Some receivers need > 600 milliseconds for the tone squelch action. It is possible to make this time delay longer, if needed.

73

Ken

From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of Thomas Delmonego
Sent: Sunday, February 17, 2013 11:53 AM
To: app_rpt-users@ohnosec.org
Subject: [App_rpt-users] Avoid squelch noise after receiving a signal

Hi,
it's possible to avoid the typical squelch noise after the reception of a valid signal from a repeater RX? Is there a specific setting, if yes in what file?
Many thanks for help!
73! Thomas, IW3AMQ

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