[mythtv-users] no channels found HDHR3-4DC

Dennis Alders dennis.alders at gmail.com
Tue Sep 9 12:15:07 UTC 2014


Hello Janusz,

When selecting Input Connections -> Connect source to input -> Scan for
> channels, Scan type Full scan (Tuned) I sometimes get the screen with
> the fields:
>
> Frequency
> Polarity
> Symbol Rate
> FEC
> Inversion
>
> and sometime a different screen with the fields
>
> Frequency
> Symbol Rate
> Inversion
> Modulation
> FEC
>
> It seems that the second screen is presented when the scan with the
> first screen fails, but perhaps the rule is more sophisticated.
>
> Anyway, have you reached the second screen and selected 'QAM 64' in the
> field 'Modulation'?
>

It looks to me like we are using different versions of mythtv
(fixes/0.27(v0.27-212-gb93fb14)). However, we both experience inconsistent
behavior in the screen presentation and options. In most cases I am
presented with a screen which allows a Full Scan with the option to select
your country. Unfortunately,  the Netherlands is not in the list. I have
tried selecting a number of neighboring countries without any luck.
Occasionally there is no country selection, instead there are options to
scan the Cable (and some other options I cannot reproduce), together with
Modulation, and channel range. Here I used qam64. This leads to a lot of
scanning without results.

Scan type Full Scan (Tuned) has different fields compared to yours (but in
my case the options are consistent and reproducible):

Frequency
Bandwidth
Inversion
Constellation
LP Coderate
HP Coderate
Trans. Mode
Guard Interval
Hierarchy

I leave all of them at auto except for frequency (304000000) and
constellation (qam64).

The field 'Symbol Rate' was also filled approprietely?


I have never had an option to fill in the Symbol Rate anywhere. This sounds
interesting! Maybe this is my problem?


>
> Actually I don't remember what I had actually done to tune succesfully
> for the first time and had problems to reproduce it on a test virtual
> machine, the scan was finding only some of the channels :-( However just a
> moment ago
> instead of Full Scan I've selected
>
> Scan of all existing transports
> Ignore Signal Timeour
> Search new Transports


Scanning transports always stops immediately in my case, it does not scan
anything.

Thanks,
Dennis
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