[mythtv-users] Unicable problems
matthias at thyroff.net
Wed May 18 21:14:27 UTC 2022
after years using my mythbox with great success and relatively little
suffering, I had to move my server to a location a bit further away from
the sat dish and there is only one cable available so I decided to
switch to unicable and this is quite a headache... I think I have
several problems, I am not even sure where to start. Maybe I first
describe what I have:
I have a Selfsat H50DCSS antenna - a flat satellite antenna with
incorporated 2x legacy and 1x unicable connections.
I have the unicable connection fed through the window and there
connected to the inhose coax cable that originally was laid for cable
tv. At the location of the receiver at the other end of that cable, I
have a 1-to-4 splitter (alternatively 1-to-2), connected to my SAT
inputs - a digital devices cine S2 V6.5 card plus one DuoFlex S2
extension card (which does not seem to work, I keep that pending for
I am also running four loopback devices (link 0:4, 1:5, 2:6, 3:7, this
is working) .
Then I have four input cards defined, one for each loopback device, from
adapter 4 to 7.
Card 1: /dev/dvb/adapter4/frontent0; type DVB-S, delivery system dvb-s2,
DiSEqC Unicable (Userband 0, 1210MHz, Pin -1, repetitions I tried 1, or
9, or 15, works all the same), type LNB (Universal-LNB (Europe))
Card 2: same for adapter 5, except Userband 1, 1420.
Card 3: same for adapter 6, except Userband 2, 1680,
Card 4: same for adapter 7, except Userband 3, 2040.
Video Source, one defined. Name "Unicable". Only EIT, frequencies
europe-west, etc. etc.
Input connections: Card 1 and 2 connected to unicable, card 3 and 4 for
now to "nothing", for later trouble shooting (these to cards error out,
the other two cards show as available in the frontend).
Input connections are configured fast tuning "never".
I think that is a relatively complete description of the setup.
Scanning for channels was quite difficult - I could never do a complete
scan (tuned), so I switched to a legacy input on the antenna, then I
scanned, and once I had the transponders, I could switch back to
unicable and do a full scan of all known transponders. I would get about
600 channels less and many transponders which would have signal on the
legacy output of the antenna do not have signal on the Unicable output,
but nothing important seems to be missing, so that is OK for now. I also
have optimized the antenna orientation with a sat finder, I think that
made it much better. With the 4x Splitter while scanning, I get about
64% Signal and S/N of about 25%, if that means anything. Reception seems
to be stable for now.
Several things seem to not work very well, but right now only one
problem is consistant and (finally, thanks for reading up to here) I
dare to ask for help:
It seems I can only watch or record one channel even though I have two
working cards. Once a program is recording, I can still enter live tv, I
see the same channel as is recording, I can switch between the two
sources (Called SAT#1 and SAT#2), but I cannot change channel, neither
on the card busy with the recording (I have configured the input to
allow for 2 concurrent recordings, so I should be able to switch to
another channel on the multiplex). nor can I change the channel on the
second card, it will also only tune to the channel that is currently
recorded on the other card.
One solution that occurs to me is to create another video source for the
second card - I have not tried, I do not know whether that would work
but that was not necessary in the past, one video source would work for
several tuner cards. So I hope to get a better suggestion from you.
Thanks a lot in advance!
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