[BC] Re: FM Translator Co-location question

[Mark Humphrey]

In most of the cases I've seen, the translator's power is low enough
that the IM generated in the "full power" station's transmitter from
the backfed translator signal will meet FCC specs without additional
filtering.  The bigger problem is usually in the other direction, but
of course it all depends on the vertical spacing between antennas and
their elevation patterns.

This situation would be quite similar to an FM IBOC station with
"space combining", except that the lower powered (digital) signals are
first-adjacent, rather than second-adjacent, to the high power.
Under the current -20 dB digital power rule, most of these facilities
meet specs, but may have problems if the proposed power boost is
approved.

Mark

On Tue, Mar 31, 2009 at 6:49 AM,  <towers at mre.com> wrote:
> However, this doesn't address any IM generated by the existing full class
> station. It too will likely need some sort of assistance in the form of a
> lossy isolator.  Which may or may not introduce more loss than the TX can
> make up in the long run.
>
> MM
>