[linux-dvb] dm1105 scan but won't tune? [RESOLVED]

Simon Baxter linuxtv at nzbaxters.com
Wed Oct 13 20:11:26 CEST 2010


> OK, progress (idiot error?)
>
> My problem was OptusB1 requires a 45 degree skew on the LNB on the dish
> itself.
>
> So now I can do an szap as follows:
> TV3:12456:h:0:22500:512:650:1920
>
> ./szap -l 11300 -c channels-conf/dvb-s/OptusD1E160 TV3
> reading channels from file 'channels-conf/dvb-s/OptusD1E160'
> zapping to 1 'TV3':
> sat 0, frequency = 12456 MHz H, symbolrate 22500000, vpid = 0x0200, apid =
> 0x028a sid = 0x0780
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> status 1f | signal cd82 | snr be5c | ber 0000ff00 | unc fffffffe |
> FE_HAS_LOCK
> status 1f | signal cd07 | snr be9e | ber 00000000 | unc fffffffe |
> FE_HAS_LOCK
> status 1f | signal cd07 | snr be4a | ber 00000000 | unc fffffffe |
> FE_HAS_LOCK
>
>
> New problem though - I can now no longer scan with the LNB skewed!!
> S 12456000 V 22500000 AUTO
> S 12456000 H 22500000 AUTO
>
> ./scan dvb-s/OptusB1-NZ -l 11300
> scanning dvb-s/OptusB1-NZ
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> initial transponder 12456000 V 22500000 9
> initial transponder 12456000 H 22500000 9
>>>> tune to: 12456:v:0:22500
> DVB-S IF freq is 1156000
> WARNING: >>> tuning failed!!!
>>>> tune to: 12456:v:0:22500 (tuning failed)
> DVB-S IF freq is 1156000
> WARNING: >>> tuning failed!!!
>>>> tune to: 12456:h:0:22500
> DVB-S IF freq is 1156000
> WARNING: >>> tuning failed!!!
>>>> tune to: 12456:h:0:22500 (tuning failed)
> DVB-S IF freq is 1156000
> WARNING: >>> tuning failed!!!
> ERROR: initial tuning failed
> dumping lists (0 services)
> Done.
>
> Any ideas?

Things to note when you install your own satellite dish and card:
1) Make sure you understand the LNB requirements for your satellite.  I
needed to skew mine on the dish by 45 degrees - wasted a lot of time getting
odd results from a vertically mounted LNB
2) Understand your LNB specs.  Mine had a 11300Mhz LSOF, which needed
allowance for when szapping, scanning and in VDR

My system:
Fedora 13 on a dual core intel platform.
combination of DVB-C (TT-1501 and TT-2300), PVR-500 and DVB-S (dm1105 based
and TT-1401) cards
Used on New Zealand cable TV, Freeview TV and Sky TV

my most recent fixes:
Use the '-r' switch in szap, to set the front end up for TS recording.
Use the '-l 11300' in szap to configure for the LNB
Use diseqc.conf file and "setup>LNB>DiSeqc ON" in VDR to set the LNB
settings






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