[linux-dvb] Problems getting signal with TwinhanDTV Alpha USB DVB-T stick

Andrew Worsley andrew.worsley at nec.com.au
Wed Sep 20 17:33:20 CEST 2006


  Hi I have just brought this recently and thought everything was going well
but I get absolutely no data out of the thing even though it is reporting
that it has a lock!



  scan fails to find any PIDs at all and if I use the settings from another
  card (on another PC) I get:
/root(127)# tzap -c /scratch/download/scan-out.txt ch9 -r        laptop:12:45AM
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
tuning to 191625000 Hz
video pid 0x0207, audio pid 0x02d0
status 00 | signal 0000 | snr ffff | ber 00ffffff | unc 0000ffff |
status 1f | signal 0000 | snr ffff | ber 00ffffff | unc 0000ffff | FE_HAS_LOCK
status 1f | signal 0000 | snr ffff | ber 00ffffff | unc 0000ffff | FE_HAS_LOCK
status 1f | signal 0000 | snr ffff | ber 00ffffff | unc 0000ffff | FE_HAS_LOCK
status 1f | signal 0000 | snr ffff | ber 00ffffff | unc 0000ffff | FE_HAS_LOCK
status 1f | signal 0000 | snr ffff | ber 00ffffff | unc 0000ffff | FE_HAS_LOCK
status 1f | signal 0000 | snr ffff | ber 00ffffff | unc 0000ffff | FE_HAS_LOCK
...
 
   which apparently shows it has a lock but there is lots of errors and no
   signal???


   I am wondering if I have the strange new tuner as described in other mails:
   "New VP7045 with TDA10046 instead of MT352". Love to know how I can tell.
   Couldn't see this in the archive.

   My box lists it as Model 7045A 305621A-301-0T

   lsusb -v -d 13d3:
gives:


Bus 004 Device 016: ID 13d3:3206 IMC Networks
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x13d3 IMC Networks
  idProduct          0x3206
  bcdDevice            0.00
  iManufacturer           1 TWINHAN
  iProduct                2 VP-7045
  iSerial                 0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x80
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval             100
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  bNumConfigurations      1
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