[mythtv-users] Scheduling recordings from a satellite box

[Kevin Kuphal]

JCA wrote:
>> An additional comment: My satellite box and my PVR-150 are
>> connected via an S-Video cable. After some googling I have got the
>> impression that the channel 3 I mentioned does not apply in this case
>> - which makes me wonder at what point in my mythtv configuration that
>> assumption is being made? Help will be most appreciated; at this
>> point, I am very confused.
>>
>> You still need to make the satellite box change channels so you get
>> the right channel.
>>     
>
>    Thanks everybody for your feedback. There is, however, some
> misunderstanding here, and I am sure that it is because I do not
> understand things correctly and/or because I am not explaining clearly
> what I mean. Let me try again.
>
>    Let's assume that I am interested to record shows from a single
> channel, as received in my satellite box; say, channel 295. My
> satellite box will always be tuned on channel 295. I know, this is not
> realistic, but please bear with me. The point I want to make is that I
> do not need to change the channel that the satellite box is tuned on
> at the time that the recording is due to start.
>
>    OK, I now want to schedule a recording in mythtv. As I have
> mentioned, using mythfrontend I select the Manage Recordings ->
> Schedule -> Recordings -> Program
> Guide menu. Here I can scroll down all the way to channel 295, and let
> mythtv know that I want to record the show that starts at 3:00 PM,
> lasting for one hour. Once this is done, I just exit from
> mythfrontend.
>
>   At 3:00PM mythbackend tries to start the recording. But it can't,
> because the only video signal it gets from the satellite box is on
> channel 3. mythbackend just prints out the error messages I enclosed
> earlier in this thread.
>
>   If, on the other hand, using the Program Guide menu from
> mythfrontend, I specify that I want to record from channel 3, then
> mythbackend is happy: When the time comes it indeed records the video
> signal it is getting, which of course corresponds to channel 295 in
> the satellite box, as mentioned three paragraphs above.
>
>   This is the issue that I want to sort out. I understand that the
> situation I am describing is correct if the video signal is sent from
> the satellite box to the PVR-150 board in my MythTV PC by means of a
> coaxial cable. Is this still true if the signal is sent by means of an
> S-Video cable instead?
>   
You are confusing what channel the satellite box is *tuned* to, what 
frequency (channel) the satellite box *outputs* on the coax output, and 
what frequency (channel) the PVR-150 tuner is *tuned* to on the coax 
input.  The channel the satellite is tuned to matches the channels in 
your program guide.  These are important.  The frequency (channel) your 
satellite box outputs on coax must match the frequency (channel) the 
PVR-150 is tuned to but is unrelated to the program guide in any way.  
In your example you never want the PVR-150 to change the tuned channel 
so configuring a channel changing script is required.  Since you need 
something to match the program guide channel to the channel your 
satellite box tunes to, you require serial or IR control of your 
satellite box.  That being said...

Don't use the coax input/output.  It is only confusing you.  Use the 
s-video cable instead.  Now it should make more sense because there is 
no channel 3, just s-video input.  Myth then expects a channel changing 
script to handle the channel changes on the satellite receiver so it is 
tuned to the right channel.  Myth never tries to change channels on the 
PVR-150 tuner because you are not using, hence, no confusion.

Kevin