On 10/11/05, <b class="gmail_sendername">Steve</b> <<a href="mailto:stgarf@gmail.com">stgarf@gmail.com</a>> wrote:<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>I have a strange predicament, or at least I haven't stumbled upon
anyone else with it yet. I have a Scientific Atlanta 4200HD box. I am
using the cable out on the back of my cable box and it goes into my
second tuner card (PVR-250). Here's the problem:
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<div>The cable box's cable out only broadcasts on channel 3. So when
Myth has a listing for lets say... channel 5, it tunes from 3 to 5. Now
it only picks up static, however for it to work, it needs to stay tuned
on 3. The cable box can be on whatever channel needs to be recorded,
that's why I bought an IR Blaster, but getting that to work is a
problem for later. I hope most, or at least all of this, made sense.
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When you run mythtv-setup and configure your capture cards you need to
tell myth not to change channels on the tuner that's connected to your
cable box. I believe this setting is in the Input Connections
section. You select Tuner0 for the 250 and tell it which source
is connected to that input. There is a box towards the bottom of
that screen where you can enter an external channel changer
command. This is where you put the full path to the script you'll
use to control the IR blaster and change channels on the cable
box. Just below that there is a box labelled something like
'Preset tuner to channel'. You want to enter 3 in that box.
It tells myth to set its tuner to channel 3 whenever it uses that
input. Obviously, you'll also need to get the IR blaster working
so myth can actually change the channel on the cable box.<br>
<br>
As another alternative, you could use composite or s-video cables to
connect the cable box to the pvr-250. This would completely
bypass the tuner on the 250 and prevent this problem, but you'll still
need to configure the external channel changing.<br>
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Hope that helps,<br>
Brad<br>
<br>
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