Descriminator audio needed????
Is descriminator audio needed for COS or can I use any radio with the RTCM???
Sorry, there is no COR input on the RTCM. It must have full bandwidth discriminator audio to correctly detect noise for squelch and RSSI. If you have a radio that limits discriminator audio to between 300 and 3000 hz it probably won't work. The good news is the squelch action is very, very good. I'd say it's as good as the much exalted MICOR squelch, maybe even better. On strong signals it's super fast, nothing more than a mic click, like reverse burst. Weak signals will have a long squelch tail. -- Tim :wq On Mar 4, 2012, at 6:49 PM, Fran wrote:
Is descriminator audio needed for COS or can I use any radio with the RTCM??? _______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
IF it is going to be used as a Voter receiver, the discriminator audio is absolutely necessary. If it is just being used as a remote radio interface, then the external CTCSS input can be used exclusively as an input to provide a "valid received signal" signal. JIM From: tim.sawyer@me.com Date: Sun, 4 Mar 2012 19:54:34 -0800 To: app_rpt-users@ohnosec.org CC: baldwin88@yahoo.com Subject: Re: [App_rpt-users] Descriminator audio needed???? Sorry, there is no COR input on the RTCM. It must have full bandwidth discriminator audio to correctly detect noise for squelch and RSSI. If you have a radio that limits discriminator audio to between 300 and 3000 hz it probably won't work. The good news is the squelch action is very, very good. I'd say it's as good as the much exalted MICOR squelch, maybe even better. On strong signals it's super fast, nothing more than a mic click, like reverse burst. Weak signals will have a long squelch tail. -- Tim :wq On Mar 4, 2012, at 6:49 PM, Fran wrote:Is descriminator audio needed for COS or can I use any radio with the RTCM???_______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users _______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
Tim Sawyer wrote:
The good news is the squelch action is very, very good.
I agree.
I'd say it's as good as the much exalted MICOR squelch, maybe even better.
I wouldn't go that far. Side by side testing shows the MICOR squelch will more reliably open on weak signals - signals that a person with a good ear could pull out. Hardware PL decoders will more reliably open down there as well - especially in the presence of voice audio. Kevin - W3KKC
Kevin. have you ever even SEEN a Voter board or RTCM? I dont believe so. No, we are not talking about the software DSP implementation on chan_usbradio. JIM
Date: Mon, 5 Mar 2012 09:46:15 -0500 From: kuggie@kuggie.com To: app_rpt-users@ohnosec.org Subject: Re: [App_rpt-users] Discriminator audio needed????
Tim Sawyer wrote:
The good news is the squelch action is very, very good.
I agree.
I'd say it's as good as the much exalted MICOR squelch, maybe even better.
I wouldn't go that far. Side by side testing shows the MICOR squelch will more reliably open on weak signals - signals that a person with a good ear could pull out. Hardware PL decoders will more reliably open down there as well - especially in the presence of voice audio.
Kevin - W3KKC
_______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
Is this what we are talking about? http://www.micro-node.com/thin-m1.html Sent from my iPhone 4S Mike / KB8WLW On Mar 5, 2012, at 10:43 AM, Jim Duuuude <telesistant@hotmail.com> wrote:
Kevin. have you ever even SEEN a Voter board or RTCM? I dont believe so. No, we are not talking about the software DSP implementation on chan_usbradio.
JIM
Date: Mon, 5 Mar 2012 09:46:15 -0500 From: kuggie@kuggie.com To: app_rpt-users@ohnosec.org Subject: Re: [App_rpt-users] Discriminator audio needed????
Tim Sawyer wrote:
The good news is the squelch action is very, very good.
I agree.
I'd say it's as good as the much exalted MICOR squelch, maybe even better.
I wouldn't go that far. Side by side testing shows the MICOR squelch will more reliably open on weak signals - signals that a person with a good ear could pull out. Hardware PL decoders will more reliably open down there as well - especially in the presence of voice audio.
Kevin - W3KKC
_______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
Jim Duuuude wrote:
Kevin. have you ever even SEEN a Voter board or RTCM? I dont believe so. No, we are not talking about the software DSP implementation on chan_usbradio.
All, My apologies. I thought this was a DSP based system as well. Kevin
participants (5)
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Fran -
Jim Duuuude -
Kevin Custer -
MICHAEL SMITH -
Tim Sawyer