I've been listening on the LA hub and noticed that the systems on there don't have a squelch tail after each receive. I have always had one no mater what radio I've used. My current config is as follows: 1 pair of Icom F221 radios (Full duplex), 1 URI and on Dell PC running ACID (Updated to latest ACID asterisk release.) The COR is hardware from the radio. PL is DSP. What is everyone else doing different? Thanks & 73 Scott KB2EAR
Scott Weis wrote:
I've been listening on the LA hub and noticed that the systems on there don't have a squelch tail after each receive. I have always had one no mater what radio I've used. My current config is as follows: 1 pair of Icom F221 radios (Full duplex), 1 URI and on Dell PC running ACID (Updated to latest ACID asterisk release.) The COR is hardware from the radio. PL is DSP. What is everyone else doing different?
Thanks & 73 Scott KB2EAR
_______________________________________________ App_rpt-users mailing list App_rpt-users@qrvc.com http://qrvc.com/mailman/listinfo/app_rpt-users
Hi Scott, There could be a couple of things that could cause this: 1. COR always asserted from the radio, and carrier detect depending on CTCSS decode only. Check for signal swing on the COR line with a voltmeter or a scope and make sure it swings below 0.3V and above 3V for signal and no signal conditions. 2. There have been reports that when external COR is used with internal DSP CTCSS decode, that the system doesn't respond as quickly as when DSP is used for both CTCSS and squelch, or when an external decoder is used for both CTCSS and the radio's squelch circuit is used. None of this is confirmed so if you could confirm it, that would be useful. As a test, try using external COR and CTCSS or a combined signal and see if that eliminates the squelch tail. Steve WA6ZFT
Hi Scott,
There could be a couple of things that could cause this:
1. COR always asserted from the radio, and carrier detect depending on CTCSS decode only. Check for signal swing on the COR line with a voltmeter or a scope and make sure it swings below 0.3V and above 3V for signal and no signal conditions.
COR no signal +12v, COR w/signal 0.0v usbradio.conf = carrierfrom=usbinvert
2. There have been reports that when external COR is used with internal DSP CTCSS decode, that the system doesn't respond as quickly as when DSP is used for both CTCSS and squelch, or when an external decoder is used for both CTCSS and the radio's squelch circuit is used. None of this is confirmed so if you could confirm it, that would be useful.
As a test I have done: External COR w/o PL (either internal or external) = Short Sq tail, External COR w/external PL = no sq tail, DSP COR and DSP PL = Really long Sq tail. ( I have radio tune rxsquelch set to 900 and RSSI is 716). I have noticed that when I do a radio tune rxnoise and I use DSP ctcss I get: WARNING: Insufficient high frequency noise from receiver. WARNING: Rx input point may be de-emphasized and not flat. usbradio.conf setting of 'carrierfrom=dsp' not recommended. but when I have ctcssfrom=no it does not give the warning.
As a test, try using external COR and CTCSS or a combined signal and see if that eliminates the squelch tail.
Steve WA6ZFT
Scott Weis wrote:
Hi Scott,
There could be a couple of things that could cause this:
1. COR always asserted from the radio, and carrier detect depending on CTCSS decode only. Check for signal swing on the COR line with a voltmeter or a scope and make sure it swings below 0.3V and above 3V for signal and no signal conditions.
COR no signal +12v, COR w/signal 0.0v usbradio.conf = carrierfrom=usbinvert
2. There have been reports that when external COR is used with internal DSP CTCSS decode, that the system doesn't respond as quickly as when DSP is used for both CTCSS and squelch, or when an external decoder is used for both CTCSS and the radio's squelch circuit is used. None of this is confirmed so if you could confirm it, that would be useful.
As a test I have done: External COR w/o PL (either internal or external) = Short Sq tail, External COR w/external PL = no sq tail, DSP COR and DSP PL = Really long Sq tail. ( I have radio tune rxsquelch set to 900 and RSSI is 716).
I have noticed that when I do a radio tune rxnoise and I use DSP ctcss I get: WARNING: Insufficient high frequency noise from receiver. WARNING: Rx input point may be de-emphasized and not flat. usbradio.conf setting of 'carrierfrom=dsp' not recommended. but when I have ctcssfrom=no it does not give the warning.
As a test, try using external COR and CTCSS or a combined signal and see if that eliminates the squelch tail.
Steve WA6ZFT
_______________________________________________ App_rpt-users mailing list App_rpt-users@qrvc.com http://qrvc.com/mailman/listinfo/app_rpt-users
Hi Scott, I wouldn't worry about this warning as far as CTCSS decode goes as CTCSS decoding doesn't depend on high frequency noise. This sounds to me like there could be a logic issue inside of XPMR or chan_usbradio This warning was something which was added to the latest xpmr code be Steve Henke, W9SH to tune the DSP code to different high frequency noise spectra between radios. Have you tried fully external CTCSS decode and Squelch and did that make a difference? Steve WA6ZFT
Scott, For what's it's worth, I am running a single Icom F221S UHF radio and using the onboard CTCSS capabilities and it works flawlessly. I don't have any problems with squelch tails, you may experiment with yours and find that to be the case, let us know how you make out if you do. :) Stephen K1LNX On Sun, Sep 20, 2009 at 1:55 PM, Scott Weis <kb2ear@kb2ear.net> wrote:
I've been listening on the LA hub and noticed that the systems on there don't have a squelch tail after each receive. I have always had one no mater what radio I've used. My current config is as follows: 1 pair of Icom F221 radios (Full duplex), 1 URI and on Dell PC running ACID (Updated to latest ACID asterisk release.) The COR is hardware from the radio. PL is DSP. What is everyone else doing different?
Thanks & 73 Scott KB2EAR
_______________________________________________ App_rpt-users mailing list App_rpt-users@qrvc.com http://qrvc.com/mailman/listinfo/app_rpt-users
-- ********************************** Stephen Brown - ARS K1LNX Johnson City, TN EM86 http://www.k1lnx.net google voice: 423-665-9367 **********************************
stephen, are you meaning "onboard" to the Icom or the USB fob? as i too have had problem with certain radios and fobs. -- Thanks in Advance Bob Brown, WØNQX Kansas City Metro Area http://sm0kenet.net http://byrg.net http://kcdstar.byrg.net "Surely you can't be serious?" "Of course I am, and don't call me Shirley." Pablo Picasso<http://www.brainyquote.com/quotes/authors/p/pablo_picasso.html> - "Computers are useless. They can only give you answers." On Sun, Sep 20, 2009 at 14:33, Stephen - K1LNX <k1lnx@k1lnx.net> wrote:
Scott, For what's it's worth, I am running a single Icom F221S UHF radio and using the onboard CTCSS capabilities and it works flawlessly. I don't have any problems with squelch tails, you may experiment with yours and find that to be the case, let us know how you make out if you do. :)
Stephen K1LNX
On Sun, Sep 20, 2009 at 1:55 PM, Scott Weis <kb2ear@kb2ear.net> wrote:
I've been listening on the LA hub and noticed that the systems on there don't have a squelch tail after each receive. I have always had one no mater what radio I've used. My current config is as follows: 1 pair of Icom F221 radios (Full duplex), 1 URI and on Dell PC running ACID (Updated to latest ACID asterisk release.) The COR is hardware from the radio. PL is DSP. What is everyone else doing different?
Thanks & 73 Scott KB2EAR
_______________________________________________ App_rpt-users mailing list App_rpt-users@qrvc.com http://qrvc.com/mailman/listinfo/app_rpt-users
-- ********************************** Stephen Brown - ARS K1LNX Johnson City, TN EM86 http://www.k1lnx.net google voice: 423-665-9367 **********************************
_______________________________________________ App_rpt-users mailing list App_rpt-users@qrvc.com http://qrvc.com/mailman/listinfo/app_rpt-users
Onboard the radio itself, I set mine to 100hz for both TX and RX for example, and of course disabled the CTCSS option in usbradio.conf On Sun, Sep 20, 2009 at 3:36 PM, Bob Brown - WØNQX <bbrown@byrg.net> wrote:
stephen,
are you meaning "onboard" to the Icom or the USB fob? as i too have had problem with certain radios and fobs.
-- Thanks in Advance
Bob Brown, WØNQX
Kansas City Metro Area
"Surely you can't be serious?" "Of course I am, and don't call me Shirley."
Pablo Picasso<http://www.brainyquote.com/quotes/authors/p/pablo_picasso.html> - "Computers are useless. They can only give you answers."
On Sun, Sep 20, 2009 at 14:33, Stephen - K1LNX <k1lnx@k1lnx.net> wrote:
Scott, For what's it's worth, I am running a single Icom F221S UHF radio and using the onboard CTCSS capabilities and it works flawlessly. I don't have any problems with squelch tails, you may experiment with yours and find that to be the case, let us know how you make out if you do. :)
Stephen K1LNX
On Sun, Sep 20, 2009 at 1:55 PM, Scott Weis <kb2ear@kb2ear.net> wrote:
I've been listening on the LA hub and noticed that the systems on there don't have a squelch tail after each receive. I have always had one no mater what radio I've used. My current config is as follows: 1 pair of Icom F221 radios (Full duplex), 1 URI and on Dell PC running ACID (Updated to latest ACID asterisk release.) The COR is hardware from the radio. PL is DSP. What is everyone else doing different?
Thanks & 73 Scott KB2EAR
_______________________________________________ App_rpt-users mailing list App_rpt-users@qrvc.com http://qrvc.com/mailman/listinfo/app_rpt-users
-- ********************************** Stephen Brown - ARS K1LNX Johnson City, TN EM86 http://www.k1lnx.net google voice: 423-665-9367 **********************************
_______________________________________________ App_rpt-users mailing list App_rpt-users@qrvc.com http://qrvc.com/mailman/listinfo/app_rpt-users
-- ********************************** Stephen Brown - ARS K1LNX Johnson City, TN EM86 http://www.k1lnx.net google voice: 423-665-9367 **********************************
participants (4)
-
Bob Brown - WØNQX -
Scott Weis -
Stephen - K1LNX -
Stephen Rodgers