Cant get QAM256 channels to work on cable

[jppentt]

Hi!

I have new MediaTV Pro T/T2/C usb adapter. Most of the channels work fine, but none that have QAM256. I tried this adapter at my home and in my workplace, both places have the same cable provider. Dvbscan gives me filter timeout error on every mux that has QAM256 and is available. TV has no problem showing these channels. Im using latest driver version. Here is log when running dvbscan

http://pastebin.com/QZaPJdGX

Info on muxes (I'm missing muxes 12,14,16,30)
http://dvb.welho.fi/cable_lah1.php

[Sundtek]

What do following commands show up:

/opt/bin/mediaclient -e
/opt/bin/mediaclient -m DVBC -f 250000000 -S 6875000 -M Q256
/opt/bin/mediaclient --readsignal=20 -d /dev/dvb/adapter0/frontend0
/opt/bin/mediaclient --cat /dev/dvb/adapter0/dvr0 | /opt/bin/mediaclient --pipecount=1000

it's a little bit weird the tuners are especially tested with QAM256 before they leave our office

Maybe contact us via Skype tomorrow (sundtek), there is definitely no QAM256 issue with our tuners; although we only test QAM64 and QAM256 in Berlin since that's most popular here. We can test QAM128 with our signal generator at least.

[jppentt]

[03:36]$ /opt/bin/mediaclient -e
**** List of Media Hardware Devices ****
device 0: [MediaTV Pro III USB (EU)]  DVB-C, DVB-T, DVB-T2, ANALOG-TV, FM-RADIO, REMOTE-CONTROL, OSS-AUDIO, RDS
  [BUS]:
     ID: 2-3
  [SERIAL]:
     ID: U140218172627
  [DVB-C]:
     FRONTEND: /dev/dvb/adapter0/frontend0
     DVR: /dev/dvb/adapter0/dvr0
     DMX: /dev/dvb/adapter0/demux0
  [DVB-T]:
     FRONTEND: /dev/dvb/adapter0/frontend0
     DVR: /dev/dvb/adapter0/dvr0
     DMX: /dev/dvb/adapter0/demux0
  [DVB-T2]:
     FRONTEND: /dev/dvb/adapter0/frontend0
     DVR: /dev/dvb/adapter0/dvr0
     DMX: /dev/dvb/adapter0/demux0
  [ANALOG-TV]:
     VIDEO0: /dev/video1
     VBI0: /dev/vbi0
  [FM-RADIO]:
     RADIO0: /dev/radio0
     RDS: /dev/rds0
  [REMOTECONTROL]:
     INPUT0: /dev/mediainput0
  [OSS]:
     OSS0: /dev/dsp0

[~]
[03:37]$ /opt/bin/mediaclient -m DVBC -f 250000000 -S 6875000 -M Q256
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
[~]
[03:37]$ /opt/bin/mediaclient --readsignal=20 -d /dev/dvb/adapter0/frontend0
== reading digital TV signal ==
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
SIGNAL: [.................................] ( 99%)  BER:      0 FREQ: 250000000  Hz LOCKED: YES SYM: 6875000 MOD: QAM256
[~]
[03:37]$ /opt/bin/mediaclient --cat /dev/dvb/adapter0/dvr0 | /opt/bin/mediaclient --pipecount=1000
[2014-04-20 03:37:46]    3123200 bytes |    3050.00 kb |       2.98 mb transferred
[2014-04-20 03:37:47]    3041280 bytes |    2970.00 kb |       2.90 mb transferred
[2014-04-20 03:37:48]    3092480 bytes |    3020.00 kb |       2.95 mb transferred
[2014-04-20 03:37:49]    3215360 bytes |    3140.00 kb |       3.07 mb transferred
[2014-04-20 03:37:50]    3102720 bytes |    3030.00 kb |       2.96 mb transferred
[2014-04-20 03:37:51]    3051520 bytes |    2980.00 kb |       2.91 mb transferred
[2014-04-20 03:37:52]    3072000 bytes |    3000.00 kb |       2.93 mb transferred
[2014-04-20 03:37:53]    2969600 bytes |    2900.00 kb |       2.83 mb transferred
[2014-04-20 03:37:54]    3194880 bytes |    3120.00 kb |       3.05 mb transferred
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[2014-04-20 03:38:04]    3543040 bytes |    3460.00 kb |       3.38 mb transferred
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[2014-04-20 03:38:15]    3000320 bytes |    2930.00 kb |       2.86 mb transferred
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[2014-04-20 03:38:17]    3205120 bytes |    3130.00 kb |       3.06 mb transferred
[2014-04-20 03:38:18]    2949120 bytes |    2880.00 kb |       2.81 mb transferred
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[2014-04-20 03:38:35]    3635200 bytes |    3550.00 kb |       3.47 mb transferred
[2014-04-20 03:38:36]    3880960 bytes |    3790.00 kb |       3.70 mb transferred
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[Sundtek]

/opt/bin/mediaclient --tsscan /dev/dvb/adapter0/dvr0

[jppentt]

03:46]$ /opt/bin/mediaclient --tsscan /dev/dvb/adapter0/dvr0
PAT: need more bytes!
PAT: need more bytes!
stream error
stream error
stream error
stream error
stream error
CAT:
CA system: 0b00
CA system: ffff
CA system: ffff
CA system: ffff
CA system: ffff
CA system: ffff
CA system: ffff
CA system: ffff
starving bits
starving bits
starving bits
starving bits
CA system: 0000
starving bits
starving bits
starving bits
starving bits
...

ouput varies a bit but always goes to starving bits
03:48]$ /opt/bin/mediaclient --tsscan /dev/dvb/adapter0/dvr0
CAT:
CA system: 0b00
CAT:
CA system: 0b00
stream error
CAT:
CA system: 0b00
pmt doesn't seem to be ok
CAT:
CA system: 0b00
CA system: ffff
CA system: ffff
CA system: ffff
CA system: ffff
CA system: ffff
CA system: ffff
CA system: ffff
starving bits
starving bits
starving bits

[Sundtek]

Since this is one of the first units, we schedule it for a replacement with the current revision for next week. Since monday is off it will be shipped on tuesday.

[Sundtek]

Just to follow up here, try to use the symbol rate 6900 or 6900000

There seems to be a mismatch of those symbol rates, we will check it tomorrow.

[jppentt]

I cant believet, but configuration was wrong. I tried symbol rate 6900000 and now it finds those missing channels and plays them perfectly on my openelec installation. Thank you very much!

[Sundtek]

Can you contact us via Skype (sundtek)? I guess we might need to update the driver a little bit for it; I guess it's some odd thing with the Demod Chip.
We have to go a little bit into detail with it since the NIT Scan will definitely resolve 6875 for your network, so we have to match them in our driver.

Since you are able to receive the channels now we lower the priority on this topic a little bit, so we'd like to check it further within the next 3-4 days.