Great information Bob,
What is the reason or advantage of using the
Link circuit board over the original motorola
AS-Board? Is the Link board just cleaner or
is there additional support circuitry?
Is a diagram of the rlc-mot layout available
anywhere?
thanks
skipp
skipp025 at yahoo.com
> Bob Dengler <[EMAIL PROTECTED]> wrote:
> At 4/1/2005 12:14 PM, you wrote:
>
> >At 11:59 AM 4/1/05, you wrote:
> >
> > >Does the Link Comm rlc-mot board provide gated
> > >full discriminator audio
> >
> >In the stock form, yes
> >
> > >or is it also de-emph
> >
> >Yes. I forget the exact details, but you have to add
> >a cap between two unused pads and that rolls off the
> >audio (you can't have both at the some time - it's either
> >one or the other). I have the info in my Mitrek interfacing
> >article at repeater-builder.com
> >
> > >(and or also sub tone filtered)?
> >
> >Nope. No low end filtering at all.
>
> While we're on the subject, I've discovered that if you're going to
have
> the RLC-MOT provide gating of the RX audio, it's best to HPF the audio
> before the RLC-MOT, not after. The reason is that some HPFs "ring"
around
> the cutoff freq. (~400 Hz on the CommSpec TS-32). If you place that
filter
> after the audio gate, the ring will be heard as sort of a 400 Hz pop.
>
> I maintain a system that uses an RLC-MOT & SCom 7K controller. We
config'd
> the RLC-MOT to gate the audio going into the 7K because the COS
propagation
> delay in the 7K is too slow to yield a "proper" Micor squelch (short
> squelch tail less than 3 milliseconds). However, it still doesn't
sound as
> good as other Micor repeaters because the HPF rings on squelch
closure &
> that pop makes it through the 7K most of the time.
>
> Bob NO6B
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