That I can do, I have another antenna that is up that I can hook to the SM.
>From what I can tell I am not getting any desence, as I did have one
operator about 25 miles away, listening through the receiver ouput, I could
here him just fine and that was with the repeat mode turned off. He would
talk, and I would key up the transmitter, nothing would change. I'm leading
it back to the PL area, as was mentioned, I think it is killing the PL as
they talk. I just want to make sure the duplexer is tuned up properly and
all is working there. If its the PL, and is coming from the handie talkie,
not much I can do there.
> Mathew,
>
> No, you should not disturb any of the hookups between your duplexer and
> antenna, transmitter, or receiver. What I meant by a "separate antenna"
> is one connected to the output of your service monitor, and which
> radiates a signal that is picked up by your repeater antenna.
>
> This method will prove or disprove whether desense is caused by your own
> transmitter. It will also enable you to determine if desense is being
> caused by a nearby transmitter on a different frequency, if the SINAD
> reading suddenly drops while your repeater transmitter is disabled. If
> this happens, you can use a spectrum analyzer to sweep the band several
> MHz each side of your receiver frequency and note what carriers are
> present at the same time your SINAD drops. As I noted in a previous
> posting, a bandpass filter may be needed to eliminate desense caused by
> a nearby transmitter.
>
> 73, Eric Lemmon WB6FLY
>
> Mathew Quaife wrote:
> >
> > Could I get by using a separate antenna to test for desense? Say
leaving
> > the antenna for the receiver through the duplexer and hooking the
> > transmitter up to another antenna, would that work the same to test for
> > desense. I tried to make an iso-tee, did not have real good luck with
it,
> > but then as far as a machinist, I have no luck at that, hihi....
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
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