- Ok, thanks, I don t really know if I have a problem with the equalizer or not, but what is happening is that even though I am in an area with good coverage forMessage 1 of 19 , Jul 4, 2008View SourceOk, thanks, I don't really know if I have a problem with the equalizer or not, but what is happening is that even though I am in an area with good coverage for my receiver the green light on the TNC will flicker instead of being a steady strong signal like it should. I have to be true line of sight before the TNC will decode everything it hears.----- Original Message ----
From: Scott Miller <scott@...>
Sent: Thursday, July 3, 2008 2:56:46 PM
Subject: Re: [tracker2] Re: Got it!
If you're having trouble with the equalizer circuit, then yes, I can do
that for you. You can send them to:
Argent Data Systems
PO Box 579
Santa Maria CA 93456-0579
Make sure to include a note saying that they need the capacitor
replacement, and include a return shipping address.
Don't ship to the Industrial Parkway address that might have been posted
before... we're currently moving to a new office.
>found the problem that's causing poor decode
> I have 4 Tracker 2's, do I need do send these in to you? I don't know
> if I could do the soldering on such small stuff.
> --- In tracker2@yahoogroup s.com <mailto:tracker2% 40yahoogroups. com>,
> Scott Miller <scott@...> wrote:
> > I think I've
> performance on
> > some OT2m's in the presence of excessive low-frequency noise and/or
> > twist where the 1200 hz tone is significantly louder than the 2200
> hz tone.
> > The input filter is specifically designed to deal with this, and I
> > couldn't figure out why it wasn't working right when the SPICE
> > simulation shows that it should be doing exactly what it needs to.
> > Turns out there's a discrepancy between the SPICE model and the
> > schematic and bill of materials - C2 should be 0.001 uF (1000 pF)
> > NOT 0.01 uF. This was flattening out the response of the filter
> > considerably.
> > I ran the Milan test track through with the modification, and the
> > of packets decoded rose to 442, from a previous total of about 60.
> > All in-stock OT2m's will be modified immediately. I'll modify and
> > return any existing units sent in. I'm going to work on a way to
> > out pre-paid return labels for US customers, but until then, you're
> > welcome to send your unit in, with no return authorization
> > Just make sure you include the return shipping address.
> > Argent Data Systems
> > PO Box 579
> > Santa Maria, CA 93456-0579
> > If you're running with the EQ jumper installed, this modification
> > needed. If you're equipped to swap out the SMT capacitor yourself
> > just need the part, let me know and I'll send you one.
> > This also doesn't affect the T2-135, which receives without de-
> > and shouldn't get this sort of problem.
> > Scott