--- mch <[EMAIL PROTECTED]> wrote:
>
> If it's mixing in the receiver or transmitter,
> notching one of the
> offending signals may help (such as a notch cavity
> on 152.240 or 152.840
> MHz). Of course, it could be mixing in a number of
> other places, too.
>
> Joe M.
The first place to look is to make sure all the TX's
have isolators and BP cavities- one of the easiest
places for mixes to occur is right in the PA. If you
don't have an isolator and a BP filter, the energy
from the other "in band" transmitters can come right
in and mix there. Since the mix product is also "in
band" it will flow back out to the antenna.
The other place to look is the 2M RX. It needs to have
plenty of rejection to the paging transmitters before
the first active stage. A BP or BR filter may be
required, as you point out.
Joe
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