You left us with very little information about the problem. I'll make the assumption that the co-channel signal is relatively distant and weak.
Assuming that the co-channel signal is not transmitting the same tone that you are using, your receiver should not open. If your receiver is opening, and you are sure that the distant station is not transmitting the same tone, you either have a faulty decoder or it is configured incorrectly (often the hookswitch will be to blame for inexperienced users). If you are a "commercial" user, there should be a microphone hookswitch. When you remove the microphone from the hookswitch, the decoder allows any signal to get through until the microphone is hung up again. Now, if the interfering signal is very strong, then it will capture your receiver and block weaker signals from getting through. Chuck WB2EDV ----- Original Message ----- From: "ptt_pupil" <[EMAIL PROTECTED]> To: <Repeater-Builder@yahoogroups.com> Sent: Tuesday, November 18, 2008 1:30 PM Subject: [Repeater-Builder] 450-460mhz Repeater Co-Channel Interference > Can anyone tell me if there are ANY fixes for co-channel interference? > What is the use of a PL tone if it isn't able to block out the co- > channel users? Is it because the co-channel user is transmitting with > more power and is able to break the PL tone? What are the expectations > of a PL tone? When does it work and when does it not work? Are there > other devices that can help all? Thanks in advance! >
