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[PATCH] Give ATSC Cable QAM64 and QAM256 options

 

 

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jarod at wilsonet

Mar 4, 2005, 1:18 AM

Post #1 of 4 (1435 views)
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[PATCH] Give ATSC Cable QAM64 and QAM256 options

The attached patch against current cvs adds "Cable (QAM-64)" as a selectable
type for the ATSC scan wizard and renames the previous "Cable" option to
"Cable (QAM-256)".

--
Jarod Wilson
jarod [at] wilsonet
Attachments: qam64scanning.patch (1.48 KB)


jarod at wilsonet

Mar 4, 2005, 1:52 AM

Post #2 of 4 (1362 views)
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Re: [PATCH] Give ATSC Cable QAM64 and QAM256 options [In reply to]

On Friday 04 March 2005 01:18, Jarod Wilson wrote:
> The attached patch against current cvs adds "Cable (QAM-64)" as a
> selectable type for the ATSC scan wizard and renames the previous "Cable"
> option to "Cable (QAM-256)".

Argh. That patch is quite obviously broken as all hell, so kindly ignore it.
This take actually builds. Applies cleanly to both current cvs and 0.17.

--
Jarod Wilson
jarod [at] wilsonet
Attachments: mythtv-0.17-qam64option.patch (1.48 KB)


rtjacob at earthlink

Mar 4, 2005, 5:49 AM

Post #3 of 4 (1335 views)
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Re: [PATCH] Give ATSC Cable QAM64 and QAM256 options [In reply to]

Quoting Jarod Wilson <jarod [at] wilsonet>:
> > The attached patch against current cvs adds "Cable (QAM-64)" as a
> > selectable type for the ATSC scan wizard and renames the previous "Cable"
> > option to "Cable (QAM-256)".

The scan needs to add both QAM64 and QAM256 channels to the same frequency set,
and some logic to not try a QAM256 channel with the same frequency if a QAM64
lock was obtained on the same frequency.. You can have both on the same cable
system.. This implimentation although not wrong would require 2 scans to get
everything available..

Plus the Cable scan is still in its infancy and needs some other work.. I will
get off my butt and make some patches to fix some of this stuff after this
weekend most likely.

Taylor
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jarod at wilsonet

Mar 4, 2005, 9:10 AM

Post #4 of 4 (1344 views)
Permalink
Re: [PATCH] Give ATSC Cable QAM64 and QAM256 options [In reply to]

On Friday 04 March 2005 05:49, Taylor Jacob wrote:
> Quoting Jarod Wilson <jarod [at] wilsonet>:
> > > The attached patch against current cvs adds "Cable (QAM-64)" as a
> > > selectable type for the ATSC scan wizard and renames the previous
> > > "Cable" option to "Cable (QAM-256)".
>
> The scan needs to add both QAM64 and QAM256 channels to the same frequency
> set, and some logic to not try a QAM256 channel with the same frequency if
> a QAM64 lock was obtained on the same frequency.. You can have both on the
> same cable system.. This implimentation although not wrong would require 2
> scans to get everything available..

Ah, didn't know that, good to know. I'd seen someone else's post about having
to change the QAM type in siscan.cpp to get 64, and have been having some
problems getting my own Air2PC card to pick up anything off own cable
service. Haven't figured out what QAM type they're using yet, so this little
patch made it easier to flip back and forth between the two.

> Plus the Cable scan is still in its infancy and needs some other work.. I
> will get off my butt and make some patches to fix some of this stuff after
> this weekend most likely.

Cool. Ready and willing to do some testing. :-)

--
Jarod Wilson
jarod [at] wilsonet

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