[Motorola] MOTRAN base/rptr

Tue, 19 Mar 2002 06:37:22 -0600

I have a VHF station that does the same thing, it has never caused a
problem, other than a low power signal within say 10 ft of the station.. I
tried switching the X-tal osc. off in standby, and indeed did have freq.
drift problems. The PL only comes on with the TX on my station, so no one
ever noticed except me, that I'm aware of.

Tony
----- Original Message -----
From: "Ken Cechura" <[email protected]>
To: <[email protected]>
Sent: Monday, March 18, 2002 10:27 PM
Subject: Re: [Motorola] MOTRAN base/rptr

> ok...but doesnt it still sound like the signal is a bit strong?  (covers
> on, outside the room....half strength 15 or 20 feet away)
>
> At 04:23 AM 3/19/2002 +0000, you wrote:
> > > Question....  Got a MOTRAN base/repeater...  Tx is (based on xtal
> > > calculation) 453.175, actual is 453.180 (no big deal)...  Problem is,
as
> > > soon as we plug it in (granted, its with a crappy antenna) the test
> > > receiver being used (Yaesu VX5R or FT847, across the room) opens
squelch,
> > > as in receives signal....  and I can still hear it on the HT 10 feet
away,
> > > through a wall...  and this is with the MOTRAN UNKEYED.  when it is
keyed
> >
> >You didn't say which frequency the signal is radiating on.  I will
presume
> >you
> >mean the transmit frequency radiates a signal even though unkeyed. What
is
> >probably happening is that the transmitter channel element is remaining
> >energized during the time the unit is in the receive mode.  I haven't
> >looked at
> >the UHF Motran base manuals in some time but there should be a way to
make
> >sure
> >the element only gets energized when the transmitter goes on the
> >air.  There is
> >probably some control wiring setup which is energizing both the receive
and
> >transmit elements continuously for a particular channel instead of just
the
> >receive one.  In a remote or repeater application, the receiver wouldn't
hear
> >the transmitter anyway, so it wouldn't matter.  It sounds like just a
> >question
> >of tracing out why the transmit element is staying energized.  The UHF
models
> >may leave the elements energized to increase stability, I can't recall.
> >
> >Geoff Fors WB6NVH
> >
> >
> >_______________________________________________
> >Motorola mailing list
> >[email protected]
> >http://mailman.qth.net/mailman/listinfo/motorola
>
>       //////////////////////////////////////////////////////
>      //        Kenneth R. Cechura, KC9UMR                //
>     //             [email protected]                     //
>    //           President, W0EEE, 2002                 //
>   // University of Missouri-Rolla Amateur Radio Club  //
> //////////////////////////////////////////////////////
>
>
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