poor reception on some frequencies (solved)

[sign2apple]

Hello Sundtek,

Having some poor reception on following frequencies using my MediaTV Pro:

• 356,000kHz QAM64 6875kBaud
• 348,000kHz QAM64 6875kBaud

What commando should I use to test these frequencies using mediaclient, so I can view the signal quality in the log? Now I use TVheadend to monitor signal quality.
Is there a commando to automatically search for muxes, or some other kind of auto-tuning commando?

Thanks,
Arthur

[Sundtek]

to tune to a certain channel via commandline

/opt/bin/mediaclient -m DVBC -f 356000000 -M Q64 -S 6875000 -d /dev/dvb/adapter0/frontend0

to read the signal statistics:

/opt/bin/mediaclient --readsignal=0 -d /dev/dvb/adapter0/frontend0

As when it comes to bad signal, please try to connect the Stick directly to the plug of your provider without any cable in between to proof that the cable is not bad (recently we had some customers with badly shielded RF cables).

[sign2apple]

I have connected the stick directly on the plug of my provider.
Still with the same results.
I tested this with the commands you gave me. Resulted in 0% signal. Other frequencies I use work just fine (100% signal). Signal should not be a problem, my TV has a verry good reception (100) on channels on these frequencies. Somehow there is no reception using the stick on these frequencies.

Code: [Auswählen]

SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 34800000   Hz LOCKED:  NO MER: 0 SYM: 6875000 MOD: QAM64


Code: [Auswählen]

SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 35600000   Hz LOCKED:  NO MER: 0 SYM: 6875000 MOD: QAM64


Code: [Auswählen]

SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 34000000   Hz LOCKED:  NO MER: 0 SYM: 6875000 MOD: QAM64


[Sundtek]

you are using wrong frequency unit (one 0 is missing)
3560000 (35 600 000) -> 356000000 (356 000 000)

[sign2apple]

Oeps Sorry
Same bad results:

Code: [Auswählen]

SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 348000000  Hz LOCKED:  NO MER: 0 SYM: 6875000 MOD: QAM64


Code: [Auswählen]

SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 340000000  Hz LOCKED:  NO MER: 0 SYM: 6875000 MOD: QAM64


Code: [Auswählen]

SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 356000000  Hz LOCKED:  NO MER: 0 SYM: 6875000 MOD: QAM64


Example good results:

Code: [Auswählen]

SIGNAL: [.................................] (100%)  BER:      0 FREQ: 364000000  Hz LOCKED: YES MER: 321 SYM: 6875000 MOD: QAM64


Code: [Auswählen]

SIGNAL: [.................................] (100%)  BER:      0 FREQ: 332000000  Hz LOCKED: YES MER: 323 SYM: 6875000 MOD: QAM64


[Sundtek]

Are you sure QAM64 and not QAM256? for those higher frequencies QAM256 is usually used actually.

If all the other frequencies work, those ones should work too and it should probably just be a matter of tuning parameters.

Just so we know, is this a 1cm thin stick or 2cm thick stick?

[sign2apple]

Oke I tested those freq. using QAM256. This seems to be the issue, as now I get 100% signal.
I used the settings in the table (Network ID: 5555) on this site: http://gathering.tweakers.net/forum/list_message/31632914#31632914 Sorry it's in dutch. Probably these setting are not correct (any more).

I think I use a 1cm stick, there is a thicker bulb on the end.

Thanks for your fast support.

Edit:
Changing the QAM to 256 is defenitely the solution. TVHeadend shows the missing channels now. I will respond on the tweakers forum, so they can correct the table.
Ziggo (provider) recently changed to 256QAM on these muxes: http://gathering.tweakers.net/forum/list_message/39393624#39393624

Edit:
The person responsible for the post has updated the table on the site