VE2CJW wrote:
I have a funny problem here. I am using my dual band radio, a Kenwood
TM-G707 as a simple scanner and I have a problem in isolating a signal. If I
open the squelch manually most of the way, I receive a signal from 400 to
523 mhz everywhere. This signal is on 24 hours a day but seems to be
modulated only part of the time. When it is modulated, in FM mode, I hear a
tv station crew doing their stuff to mount a program. I can hear the
producer giving orders to the cameramen and also the script girl. The mikes
are on all the time and not switched. I can't identify what station it is
but this has been going on for many years. what I would like to do is
identify the exact frequency they use but they splatter all over the band.
Is there a way to really zero on them? Since I live in the Montreal area, it
could come from everywhere but Iknow it's not coming from my town because no
one does that kind of free lance work around here. I am really baffled and
would appreciate some sugestions. Thanks.
Mike.



Hi, Mike -

I've heard a similar signal just above the 70 cm band (above 450 MHz) but I
don't remember the exact frequency. It was a local AM radio station using
that frequency for remote broadcasts like, say, a little league baseball
game. While not actually rebroadcasting the game, I could hear all sorts of
stuff going on. They even occasionally used the frequency as one half of a
duplex communications link as an aid in getting everything set up. The other
half of the duplex link was the AM radio station!

Sounds like you might have something similar in your area, but perhaps the
signal is so strong that your receiver is overloading so as to make the
signal appear wide. Or, maybe they're also broadcasting the video as well.
As you know, video is very wide (but not 123 MHz wide).

You could try a different location to monitor them and see if the signal
narrows down some. Otherwise, try to zero in on the voice frequency.

Just a guess.

Cheers,
John