[mythtv-users] QAM64 vs. QAM256

Geoff Mishkin gmishkin at acs.bu.edu
Sun Apr 22 15:23:57 UTC 2007


I heard about that too, but then why would QAM64 work for his card?  It
doesn't work on mine, for instance (only QAM256 does, as I'd expect).

             --Geoff Mishkin <gmishkin at bu.edu>

Brad DerManouelian wrote:
> On Apr 22, 2007, at 11:13 AM, Geoff Mishkin wrote:
>
>   
>> I've been trying to get the digital part of my roommate's pcHDTV  
>> HD-5500
>> to cooperate for a couple of months now.  I have an HD-3000 which  
>> works
>> fine with QAM256, but with his, the signal strength would remain at 0
>> when I try to scan QAM256.  I recently inadvertently scanned QAM64 and
>> to my amazement, all the channels showed up!
>>
>> We are both connected to the same cable system, and are behind the  
>> same
>> splitter.  We are both on kernel 2.6.20.  I was wondering if someone
>> could provide an explanation for the apparent two different  
>> modulations
>> on the same piece of wire.
>>
>>              --Geoff Mishkin <gmishkin at bu.edu>
>>     
>
> I think I remember a bug in some newer kernels where the strength is  
> not reported correctly and always displays as 0.
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