[mythtv-users] Tuning problems
John Pilkington
johnpilk222 at gmail.com
Tue Jan 1 23:53:48 UTC 2019
On 01/01/2019 22:29, Damian wrote:
>
>
> On 01/01/2019 21:00, John Pilkington wrote:
>> On 01/01/2019 19:38, Damian Surr wrote:
>>>
>>>
>>> On 28/12/2018 22:04, John Pilkington wrote:
>>>> On 28/12/2018 16:11, Damian wrote:
>>>>> Hi all,
>>>>>
>>>>> I've had tuning issues for months now, but we mainly watch
>>>>> downloaded content, so I've not worried too much about it.
>>>>>
>>>>> However, there's not much point using MythTv without the TV bit!
>>>>> :-) And I know how great it can be when it's working, so I'd like
>>>>> to sort this out if I can.
>>>>>
>>>>> Here's the issue ...
>>>>>
>>>>> To keep things simple, I've got 2 SD tuner sticks installed at the
>>>>> moment. I've got a HD one waiting to be used too, but I'm not too
>>>>> worried about HD TV. I'd rather just get the 2 SD sticks working
>>>>> again.
>>>>>
>>>>> I'm in the UK and should be (at least we used to be!) in the Mendip
>>>>> area.
>>>>>
>>>>> Here are the details hoe how Mendip 'should' tune ...
>>>>> https://ukfree.tv/transmitters/tv/Mendip
>>>>>
>>>>> The settings are different to what they were a few years ago, but
>>>>> to me it looks like I the main channels are at 562000000Hz,
>>>>> 578000000Hz.
>>>>>
>>>>> When I do a full scan, with MythTV, it gives me transports like ...
>>>>> 698000000 Hz,
>>>>> 738000000 Hz
>>>>> 690000000 Hz
>>>>> 721833330 Hz
>>>>>
>>>>> Auto turn always results in finding channels, but they are
>>>>> temperamental and unreliable.
>>>>>
>>>>> This wouldn't be a problem as MythTV always seemed to tune to the
>>>>> wrong transports. The problem is that if I edit the transports,
>>>>> like I have in the past, to mathc up frequencies, then the system
>>>>> fins nothing!
>>>>>
>>>>> Back when things used to work, manually editing the transports
>>>>> would solve everything and I'd have rock solid tuning. however,
>>>>> that's not been the case for along time now.
>>>>>
>>>>> Any ideas how to get to the bottom of this?
>>>>>
>>>>> I should mention that if I need to go to the command line, my level
>>>>> is 'ls' and 'top'! :-) I can follow instructions, but have no idea
>>>>> what I'm doing in there.
>>>>>
>>>>> One final thing to mention is a new error message that I'm noticing
>>>>> when I go into the Multiplex editor. It's stated saying:
>>>>> "Sorry, the Transport Editor can only be used to edit transports
>>>>> which are connected to a card input."
>>>>>
>>>>> However, it then seems to work fine.
>>>>>
>>>>> Hope some of you geniuses can help! :-)
>>>>>
>>>>> Cheers,
>>>>> Damian
>>>>
>>>> Hi Damien: This may help:
>>>>
>>>> https://www.a516digital.com/2018/02/freeview-frequency-changes-27th-feb-and.html
>>>>
>>>>
>>>> I don't know how authoritative it is, but it notes frequency changes
>>>> made at Mendip in February, although it doesn't look as if they
>>>> affected the main muxes. Last time I looked ukfree.tv hadn't caught
>>>> up with changes made at my local transmitter around that time.
>>>>
>>>> John P
>>>
>>> Thanks for this John,
>>>
>>> Although I don't understand it enough to know the implications :-)
>>>
>>> I've just tested out an actual real TV, and it scanned all channels,
>>> so I assume Myth should be able to find them too.
>>>
>>> Regards,
>>> Damian
>>>
>> Hi Damian: *If* your best transmitter is Mendip and you have DVB-T
>> tuners I think you need the main PSB muxes on 562 and 578, and Com 4,5
>> and 6 on 690, 570 and 594 MHz - ie the numbers quoted followed by
>> 000000. The 'local' low power transmitter for Bristol is on 714 MHz.
>> Have a line for each, set its Bandwidth to 8 MHz and try a scan of
>> 'All known transports' You might be able to input fewer muxes if you
>> 'enable scanning of linked transports,' but there have been changes in
>> the details and I don't like exploring on a working system!
>>
>> The other frequencies listed will need DVB-T2-capable tuners. Skip for
>> now.
>>
>> The 'connected to card input' thing is likely looking for something
>> like 'dvb' in the 'Video Source' box on the Channel Editor page. When
>> I click OK it goes away...
>>
>> John
>
> I've tried, many times, to manually set the transports to the correct
> frequencies, and then scan only those frequencies.
>
> That used to work fine, but doesn't any more.
>
> I'm at a loss on how to get this working.
>
> Mendip is the transmitter that used to work fine.
>
> I've used an app on my phone to set the angle of my antenna as
> accurately as I can.
>
> I've looked at the antenna's, on the roofs of neighbours houses, and the
> angle looks the same as mine.
>
> Regards,
> Damian
The data on the ukfree site for Mendip seems to be a mix of largely
obsolete info, and much of the frequency/mux data on the web now looks
outdated. There are user contributions saying that some of the planned
changes at Mendip have not happened. Inter-mux links may still work...
The frequencies that you have been seeing seem to be in the 'old' Mendip
list.
John
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