[linux-dvb] Artec T1 -> Tuning failed : a suggestion

Alan alan.crevon at wanadoo.fr
Fri Jun 9 11:42:00 CEST 2006


hi all

i am trying to scan for dvb-t channels with this blody Artec T1 with no  
luck (the error message at the bottom of this mail) and googling around, i  
found i was not the only one with this problem, and many cinergyT2 users  
had this very problem. It has been solved for them using a simple trick.

In cynergy2t.c, someone noticed this :

.frequency_min = 174000000,
.frequency_max = 862000000,
.frequency_stepsize = 166667,

He rounded the stepsize to 167000, and added 167000 to each frequency to  
scan. (I.e. : in fr-Rouen, "T 538000000 8MHz 2/3 NONE QAM64 8k 1/32 NONE"  
became " T 538167000 8MHz 2/3 NONE QAM64 8k 1/32 NONE ") and then scanning  
worked just fine.

Of course, i tried the same trick, and of course it didn't work. I am not  
a developper AT ALL, i don't understand anything in technical stuffs, but  
i think that, maybe, such a thing is also possible with my device. The  
point is : where is the equivalent to the frequency_stepsize value for my  
device  (dmesg output at the end of the mail)?

Best regards

alan.


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[alan at Fixe scan]$ ./scan dvb-t/fr-Rouen
scanning dvb-t/fr-Rouen
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
initial transponder 538000000 0 2 9 3 1 0 0
initial transponder 474000000 0 2 9 3 1 0 0
initial transponder 522000000 0 2 9 3 1 0 0
initial transponder 498000000 0 2 9 3 1 0 0
initial transponder 602000000 0 2 9 3 1 0 0
initial transponder 562000000 0 2 9 3 1 0 0
>>> tune to:  
>>> 538000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TR  
>>> ANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
WARNING: >>> tuning failed!!!
>>> tune to:  
>>> 538000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TR  
>>> ANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE (tuning failed)
WARNING: >>> tuning failed!!!
>>> tune to:  
>>> 474000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TR  
>>> ANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
WARNING: >>> tuning failed!!!
>>> tune to:  
>>> 474000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TR  
>>> ANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE (tuning failed)
WARNING: >>> tuning failed!!!
>>> tune to:  
>>> 522000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TR  
>>> ANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
WARNING: >>> tuning failed!!!
>>> tune to:  
>>> 522000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE  
>>> (tuning failed)
WARNING: >>> tuning failed!!!
>>> tune to:  
>>> 498000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
WARNING: >>> tuning failed!!!
>>> tune to:  
>>> 498000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE  
>>> (tuning failed)
WARNING: >>> tuning failed!!!
>>> tune to:  
>>> 602000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
WARNING: >>> tuning failed!!!
>>> tune to:  
>>> 602000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE  
>>> (tuning failed)
WARNING: >>> tuning failed!!!
>>> tune to:  
>>> 562000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
WARNING: >>> tuning failed!!!
>>> tune to:  
>>> 562000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE  
>>> (tuning failed)
WARNING: >>> tuning failed!!!
ERROR: initial tuning failed
dumping lists (0 services)
Done.
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 From dmesg :
[...]
usbcore: registered new driver dvb_usb_dibusb_mb
usb 6-2: new full speed USB device using ohci_hcd and address 3
dvb-usb: found a 'Artec T1 USB1.1 TVBOX with AN2235 (faulty USB IDs)' in  
cold state, will try to load
a firmware
dvb-usb: downloading firmware from file 'dvb-usb-dibusb-an2235-01.fw'
usb 6-2: USB disconnect, address 3
dvb-usb: generic DVB-USB module successfully deinitialized and disconnected
[...]
usb 6-2: new full speed USB device using ohci_hcd and address 4
dvb-usb: found a 'DiBcom USB1.1 DVB-T reference design (MOD3000)' in warm  
state.
dvb-usb: will use the device's hardware PID filter (table count: 16).
DVB: registering new adapter (DiBcom USB1.1 DVB-T reference design  
(MOD3000)).
DVB: registering frontend 0 (DiBcom 3000M-B DVB-T)...
dibusb: This device has the Thomson Cable onboard. Which is default.
dvb-usb: schedule remote query interval to 150 msecs.
dvb-usb: DiBcom USB1.1 DVB-T reference design (MOD3000) successfully  
initialized and connected.



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