[mythtv-users] trying to set myth for fta sats 125w and 87w

Fri Oct 24 14:08:05 UTC 2014

@stephen worthington:

i have duplicated the setting of my geosat unit when configuring myth:
universal lnb (all default values for that kind of lnb, displayed by the
myth, match what the microhd displays).

i was a bit but off by the "...(europe)" string put after "universal" in
the preset (i.e.: "universal (europe)"), but since all lnb parametres below
("lnb lof switch (mhz)", "lnb lof low (mhz)", etc.) matched what i have on
my working fta receiver, i stuck with that lnb preset.

as for the switch, there aren't that many parameters to set.  type =
"diseqc", number of ports = 4.  i mean, how can you get this wrong?  i use
those settings on the geosatpro microhd, no problems.

this is why i am puzzled by the incapacity of myth to achieve a signal lock
and finding channels.
and even more by the feedback given by scan-s2: what is this "DVB-S IF
freq"?

nonetheless, i will heed your advice, though i am unsure how to use scan-s2
to probe and display the parameters for both the switch and lnbs.  i don't
see how to do this on the linuxtv wiki (or the command's built-in help).
 how would you do this?

cheers.

2014-10-24 2:26 GMT-04:00 Stephen Worthington <stephen_agent at jsw.gen.nz>:

> On Fri, 24 Oct 2014 00:12:23 -0400, you wrote:
>
> >i have procurred a tbs 6982 card in order to have a myth-based pvr for fta
> >broadcasts.
> >
> >i have two dishes set up, one aimed at 125w amc21, the other pointed to
> 87w
> >ses2.
> >
> >each dish has an "Avenger PLL322S-2 Dual LNB"; one output goes to a
> >geosatpro microhd fta receiver attached to my toshiba flat-panel, the
> other
> >output to the tbs card.
> >
> >diseqc switches used are "b.e.s.t. germany" 4x1 units. one unit is for the
> >microhd receiver, the other is for the mythtv pvr.
> >on both diseqc switches, port 1 is for 125w, port 2 is for 87w.
> >
> >using such a configuration, i know that if the geosat receiver sees a
> >strong signal from a satellite, the tbs fta card should see the same.
> >it should not be possible for the myth pvr to the hooked to a dish that is
> >not aimed correctly.
> >
> >so i have installed the latest mythbuntu onto that pvr (version 14.04.1).
> > after downloading and installing the drivers for the fta
> >card, i have configured myth to use that card, to use a diseqc switch to
> >access either lnb, and to use "universal (europe)" lnb units (the avenger
> >units are universal).
> >
> >as a "video source", for the time being, i have told myth to use
> >"transmitted guide only (eit)" as a grabber.
> >
> >scanning for channels on both sats has the same result: despite the signal
> >gauge clearly fluctuating on something as the scan progresses,
> >no lock is achieved, a "time out, no signal" message is displayed, as well
> >as "failed to find any channel"
> >
> >each time, i have proceeded with a "full scan (tuned)", entering the
> >frequency of a specific transponder, polarity, symbol rate, etc.
> >these values are what i see on my geosat receiver, only with some added
> >zeroes in some cases.
> >
> >i have also tried to use the command-line utility "scan-s2" on both sats,
> >without much more success.
> >
> >i think the problem is simple, but the documentation i have found isn't
> >fully up to date and might be incomplete.
> >i am sure someone more experienced might see whatever mistake i have made
> >very quickly.  so, help?
> >
> >
> >to give an idea of the values i have entered, here are the .conf files i
> >have created to use with scan-s2:
> >
> >(in both cases, these are transponders used by pbs)
> >
> >87W.conf:
> >
> >S2 11812000 H 11149000 3/5 AUTO 8PSK
> >
> >
> >
> >----
> >
> >125W.conf:
> >
> >S2 12180000 V 30000000 3/4 AUTO 8PSK
> >
> >
> >
> >----
> >
> >
> >here are two attempted runs of scan-s2, one for each sat:
> >
> >###start###
> >
> >root at myth-fta:~/Downloads/TBS/scan-s2# su root
> >root at myth-fta:/home/bruno/Downloads/TBS/scan-s2# ./scan-s2 -a 0 -f 0 -s 2
> >-l UNIVERSAL 87W.conf
> >API major 5, minor 3
> >scanning 87W.conf
> >using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> >initial transponder DVB-S2 11812000 H 11149000 3/5 AUTO 8PSK
> >----------------------------------> Using DVB-S2
> >>>> tune to: 11812:hC35M5S1:S0.0W:11149:
> >DVB-S IF freq is 1212000
> >WARNING: >>> tuning failed!!!
> >>>> tune to: 11812:hC35M5S1:S0.0W:11149: (tuning failed)
> >DVB-S IF freq is 1212000
> >WARNING: >>> tuning failed!!!
> >ERROR: initial tuning failed
> >dumping lists (0 services)
> >Done.
> >root at myth-fta:/home/bruno/Downloads/TBS/scan-s2#
> >root at myth-fta:/home/bruno/Downloads/TBS/scan-s2# ./scan-s2 -a 0 -f 0 -s 1
> >-l UNIVERSAL 125W.conf
> >API major 5, minor 3
> >scanning 125W.conf
> >using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> >initial transponder DVB-S2 12180000 V 30000000 3/4 AUTO 8PSK
> >----------------------------------> Using DVB-S2
> >>>> tune to: 12180:vC34M5S1:S0.0W:30000:
> >DVB-S IF freq is 1580000
> >WARNING: >>> tuning failed!!!
> >>>> tune to: 12180:vC34M5S1:S0.0W:30000: (tuning failed)
> >DVB-S IF freq is 1580000
> >WARNING: >>> tuning failed!!!
> >ERROR: initial tuning failed
> >dumping lists (0 services)
> >Done.
> >root at myth-fta:/home/bruno/Downloads/TBS/scan-s2#
> >###end###
>
> When I was having problems like that here in New Zealand, it was the
> LNB settings.  I found it very difficult to find the correct settings,
> and it turned out that at the time, MythTV had a bug in how the setup
> for the LNB settings worked and I had to use SQL on the database to
> make it work.  So I would suggest that you do a search for the correct
> LNB and diseqc settings for your hardware with scan-s2 and see if you
> have that right.  Once you get scan-s2 working, then try to interpret
> the settings into how MythTV sets up the same settings.
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://www.mythtv.org/mailman/listinfo/mythtv-users
> http://wiki.mythtv.org/Mailing_List_etiquette
> MythTV Forums: https://forum.mythtv.org
>

-- 
Bruno Majewski
majewskibr at gmail.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.mythtv.org/pipermail/mythtv-users/attachments/20141024/468e6617/attachment.html>