[NHRC-user] CTCSS

[Jeff Otterson]

Most likely your CTCSS tone is getting attenuated as you pass it through 
your repeater system.  Some of your radios are more sensitive to the tone 
than others.

You would be better off to filter out the tone on receive, then re-generate 
it on transmit, injecting the tone into the transmitter's CTCSS tone input, 
rather than mixed with the mic audio.

The NHRC-3 has very good frequency response, so I doubt that it is 
attenuating your CTCSS tone, more likely it is the phase modulator in your 
transmitter.

Can you try it with a higher frequency tone and see how it works?

Jeff

At 03:23 PM 4/7/2007, you wrote:

>I just conducted a second test. It is working on a Kenwood D-700 mobile.

>

>- Garrett

>

>-----Original Message-----

>From: nhrc-user-bounces at nhrc.net [mailto:nhrc-user-bounces at nhrc.net] On

>Behalf Of KD6KPC

>Sent: Saturday, April 07, 2007 12:13 PM

>To: NHRC-user at nhrc.net

>Subject: [NHRC-user] CTCSS

>

>

>I am having a strange issue with tone decoding. I have an NHRC-3 with a

>TS-32 connected. It is working fine to decode the tone when keying the

>repeater, but sending it through seems to be an issue. I am also using a GE

>Mstr II radio.

>

>I believe the tone, or at least some remnant of it. When I set my Yaesu VX-7

>HT to T SQL mode, set the PL to the same tone being sent to the repeater,

>the squelch is tripped when the repeater is keyed and the radio passes the

>audio. The courtesy tone is suppressed, which is desirable in this case.

>

>However, when I do the same thing with an Icom 206 mobile and a Kenwood

>TM-733, I am not able to bypass the squelch. If I transmit on simplex to the

>radio on the repeater's output, it works, but not going through the

>repeater.

>

>I was trying to get this function to work so that I can set up a clean

>repeater link using EchoLink.

>

>73's

>

>Garrett Dow, KD6KPC

>http://www.nwham.com <http://www.nwham.com/>

>

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