On May 23, 2007, at 8:48 PM, tgundo2003 wrote: > 2. Has anyone had any problems with interference from the Railroad > Locomotive Remote control and telemetry systems? They are on 452.XXXX > and 457.XXXX. I have a UHF repeater near a railyard and they are > clobbering the input at times.
When you say "clobbering the input" have you looked at this signal with a spectrum analyzer? I doubt they're really on your input. What is your receive frequency? You're more likely fighting a mix with something else or they have serious problems with that transmitter. If they're really on your input, which I assume is at least 3-5 MHz away... they gotta fix that if there's any reasonable amount of separation between you and them. Would be best to know before you bug 'em, but if they're friendly -- they'll likely have the right test gear to find out what their transmitter is doing... if anything. What kind of radio is your receiver, are there any other high-power transmitters in the area, and what frequency is your receiver on? If their transmitter is on full-time, and it only "clobbers" you part- time, it's a mix... with something else that's going on and off the air... you need to find that signal and then do the math to see if the mix makes sense... etc. -- Nate Duehr, WY0X
