[mythtv-users] I'm about to give up on this entire thing...

[John Klimek]

Vaguely, I can read the pin numbers on my DB9F connector.  Looking at the
BACK (so I can see the holes), it is numbered like this...

5 4 3 2 1
 9 8 7 6

You're right about the receiver box.  How are you reading the 4P4C diagram?
Or maybe I should ask, from reading that diagram, which pin on the 4P4C
connector goes to which DB9F hole?  I would assume:

(DB9F) - to - (4P4C)
5 - to - 1
2 - to - 2
3 - to - 4

With that setup, it looks like the null is already included... or maybe I'm
completely wrong...

Ray Olszewski is trying to help me out in another message thread but I think
we're both out of ideas.  At first I was numbering my DB9F as  DB9M
connector, but my cable still doesn't work even when connected properly (?).

If (and when?) I get this figured, I am definitely going to write a very
detailed HOW-TO with pictures to help out everybody else.  So any more help
you can provide will hopefully benefit people in the future as well.

Thanks again,
John




----- Original Message ----- 
From: "Christian Hack" <christianh at pdd.edmi.com.au>
To: "Discussion about mythtv" <mythtv-users at snowman.net>
Sent: Tuesday, June 10, 2003 8:03 AM
Subject: RE: [mythtv-users] I'm about to give up on this entire thing...


> > -----Original Message-----
> > From: John Klimek [mailto:jmk396 at psu.edu]
> > Sent: Tuesday, 10 June 2003 9:51 PM
> > To: christianh at pdd.edmi.com.au; Discussion about mythtv
> > Subject: Re: [mythtv-users] I'm about to give up on this entire thing...
> >
> >
> > The Linux interface (perl script) doesn't work what-so-ever.  So,
> > I've been
> > testing with only the Windows interface (DTVCON).
> >
> > I wish I had a port debugger, but unless they are very cheap,
> > it's not worth
> > it for me to spend money on a one-time project.
> >
> > What is this "null" that I need in the cable?
> >
> > Thanks for helping me...
> >
>
> The null part simply means you need to connect transmit on one box to
> receive on the other box - and then recieve on the first box to transmit
on
> the second box. You probably already are, but I was just checking to make
> sure.
>
> Unfortunately if you are following the wiring guide here
> (http://www.pcmx.net/dtvcon/) they seem to list the 4P4C connector with
two
> versions of which one is pin 1. See the two Sig columns where TXD and RXD
> pair up? That's the null.
>
> Really there should only be two correct combinations.
>
> Are you taking the DB9/25 pin numbers off a diagram or the actual
connector?
> Use the connector markings if you have them and can read them. It can be
> very confusing depending on whether you're looking at the back or front
and
> whether it's a male or female. Reading the numbers directly off the
> connector removes that issue. The PC is fixed - the only variable is the
> decoder box.
>
> CH
>
>
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