[mythtv-users] Hauppauge WinTV-quadHD issues

John Pilkington johnpilk222 at gmail.com
Tue Feb 2 21:30:23 UTC 2021

On 02/02/2021 20:47, John Pilkington wrote:
> On 02/02/2021 19:50, Simon Hobson wrote:
>> I've just pulled out my old HVR-1250 (IIRC) cards and replaced them 
>> with a new QuadHD card. It's working fine, giving me 4 tuners (and 
>> eliminating the recording errors due to poor signal*), but I've a 
>> couple of issues :
>> I can't find where to configure multi-rec.
>> That's one of those "so long sine I last did it, can't remember how I 
>> did it" things.
>> According to 
>> https://www.mythtv.org/wiki/Record_multiple_channels_from_one_multiplex it's 
>> just a case of going into the advanced settings and setting the number 
>> of virtual tuners, and that's how I vaguely remember doing it. But 
>> it's just not there in my setup.
>> It's shown as Silicon Labs Si2168 and subtype DVB-T2 - but no advanced 
>> settings option.
> mythtv-setup > Input connections > select device > interactions between 
> inputs > max recordings
>> It's not finding any DVB-T2 muxes.
>> I should be getting at least 1 T2 mux, according to 
>> https://ukfree.tv/transmitters/tv/Winter_Hill the PSB3/BBCB mux should 
>> be on 585.8MHz. It's not found by a full scan, nor by a "scan an 
>> existing transport and find any linked ones" option. I suspect Com7 on 
>> 746MHz will be out of band for my aerial so I'm not bothered about that.
>> Any thoughts ?
>> Simon
>> * having two cards I needed to use a splitter - so lost a lot of 
>> signal strength. It was fine when I first set it up here, but has 
>> degraded to the point where I had to remove the splitter and disable 
>> one of the cards - thus hitting limitations with only one real tuner.
> Perhaps a bit late now, but a preamp before the splitter ought to 
> maintain the signal to noise ratio as well as boosting the level.  Newer 
> tuners do this on-chip.
> I forget which release you have been using, but a *lot* of work has gone 
> into DVB channel scanning recently.
> John P

And I ought to have picked up on your T2 query.  iirc the DVB-T2 
transports carry the links to DVB-T,  but there are no links to the 
DVB-T2 ones;  and in my experience the UK Free channel info has often 
not been kept up to date.  I have found the 'manual tuning' menu of my 
TV helpful in warning when a 'difficult' mux is undergoing maintenance; 
scanning in the evening has worked best.  Of course that will only work 
if Myth and your TV can receive simultaneously.


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