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
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
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****
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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 …****
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On the repeater you need (usbradio.conf)****
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txtoctype=notone****
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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. ****
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Some receivers need > 600 milliseconds for the tone squelch action. It is possible to make this time delay longer, if needed.****
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73****
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Ken****
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*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** **
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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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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 _______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
Ciao Ken, many thanks for your reply! Your solution inhibit only the noise for an RTX, not the noise for the RX of a repeater. I find a solution ... see my own mail. 73! Thomas, IW3AMQ From: ke2n@cs.com To: iw3amq@dnet.it; app_rpt-users@ohnosec.org Subject: RE: [App_rpt-users] Avoid squelch noise after receiving a signal Date: Sun, 17 Feb 2013 12:25:57 -0500 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
Now i've find in the web the right order for the "usbradio.conf" file: [usb] ... rxsquelchdelay=150 ;delaytime in ms carrier squelch tail eliminator And i must set also this parameter: rxondelay=4 ;avoid squelch tail or disable RX audio in the beginning of an RX signal It's a pity, that's no complete handbook can find ... 73! Thomas, IW3AMQ From: iw3amq@dnet.it To: app_rpt-users@ohnosec.org Date: Sun, 17 Feb 2013 17:52:53 +0100 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 _______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
participants (3)
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Ken -
Shane Morris -
Thomas Delmonego