Hi Jeff, "A duplexer is working correctly when the sensitivity of the receiver is not degraded when the transmitter becomes active. There are test procedures to check this out, but the explanation of these tests is beyond the scope of this article. [OK, I'll agree with him so far] However, should you hear a slow oscillation of the transmitter when it turns on and off (a rate of about 1-2 Hz rate on weak signals), then you do have duplexer desensitization."
What is this 1-2 Hz oscillation he's talking about? A weak signal brings the repeater up, desensitization causes the receiver to no longer hear the weak signal, the repeater drops, and the cycle repeats. 73, Bob, WA9FBO ________________________________________________________________________ AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com.
