Autor Thema: low signal dvb-c  (Gelesen 13691 mal)

sign2apple

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low signal dvb-c
« am: April 27, 2013, 06:00:35 Nachmittag »
I get low signal.
Stick is directly mounted to the wall mount.
Normal TV gives me good signal on same mount.
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 162000000  Hz LOCKED: YES MER: 343 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 170000000  Hz LOCKED: YES MER: 338 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 332000000  Hz LOCKED: YES MER: 345 SYM: 6875000 MOD: QAM256
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 340000000  Hz LOCKED: YES MER: 343 SYM: 6875000 MOD: QAM256
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 348000000  Hz LOCKED: YES MER: 342 SYM: 6875000 MOD: QAM256
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 356000000  Hz LOCKED: YES MER: 341 SYM: 6875000 MOD: QAM256
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 364000000  Hz LOCKED: YES MER: 323 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 372000000  Hz LOCKED: YES MER: 321 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 380000000  Hz LOCKED: YES MER: 318 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 388000000  Hz LOCKED: YES MER: 320 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 396000000  Hz LOCKED: YES MER: 324 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 404000000  Hz LOCKED: YES MER: 347 SYM: 6875000 MOD: QAM256
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 412000000  Hz LOCKED: YES MER: 344 SYM: 6875000 MOD: QAM256
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 420000000  Hz LOCKED: YES MER: 338 SYM: 6875000 MOD: QAM256
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 428000000  Hz LOCKED: YES MER: 338 SYM: 6875000 MOD: QAM256
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 436000000  Hz LOCKED: YES MER: 339 SYM: 6875000 MOD: QAM256
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 444000000  Hz LOCKED: YES MER: 349 SYM: 6875000 MOD: QAM256
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 474000000  Hz LOCKED: YES MER: 319 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 490000000  Hz LOCKED: YES MER: 320 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 522000000  Hz LOCKED: YES MER: 311 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 562000000  Hz LOCKED: YES MER: 328 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 578000000  Hz LOCKED: YES MER: 324 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 586000000  Hz LOCKED: YES MER: 321 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 722000000  Hz LOCKED: YES MER: 312 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 770000000  Hz LOCKED: YES MER: 309 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 778000000  Hz LOCKED: YES MER: 312 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [.............                    ] ( 40%)  BER:  41248 FREQ: 786000000  Hz LOCKED: YES MER: 310 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 802000000  Hz LOCKED: YES MER: 318 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 810000000  Hz LOCKED: YES MER: 313 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 826000000  Hz LOCKED: YES MER: 308 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 834000000  Hz LOCKED: YES MER: 304 SYM: 6875000 MOD: QAM64
Using device: /dev/dvb/adapter0/frontend0
Checking for lock:
. [LOCKED]
== reading digital TV signal ==
SIGNAL: [                                 ] (  0%)  BER:  41248 FREQ: 842000000  Hz LOCKED: YES MER: 300 SYM: 6875000 MOD: QAM64

Sundtek

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Re:low signal dvb-c
« Antwort #1 am: April 27, 2013, 10:03:13 Nachmittag »
Hmm seems like the signal strength is strong enough (MER indicates that and the tuner locks onto the frequency).
However that the Signal Quality is so low indicates that there is some noise on the cable which the tuner cannot handle.

There can only be 2 possibilities:
1. Faulty tuner, which would be odd since the MER is already okay and those things are handled within the Chip itself.
2. Too noisy cable, problem with grounding
Sundtek Support Engineer

sign2apple

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Re:low signal dvb-c
« Antwort #2 am: April 28, 2013, 09:58:33 Nachmittag »
I have tried the stick in somebody else's home and read signal gave me 100%.
So indeed the cable must be noisy in my home, strange I have good reception on my TV.
How do I get rid of this noise. I have checked the wallmount, it is directly connected to my providers cable. The connection looks fine.
My provider's manual says "You should only connect the groundcable if your wallmount is in the fusebox". My wallmount is in the livingroom, I don't have an earth terminal to connect to. Please help me out.

Sundtek

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Re:low signal dvb-c
« Antwort #3 am: April 28, 2013, 11:18:31 Nachmittag »
You might try it with a notebook which is not connected to the powerline to see if that improves the situation?

I guess our upcoming DVB-C devices are more immune against such noisy lines. However you are also the first one reporting such an issue as far as I remember.
« Letzte Änderung: April 29, 2013, 12:33:06 Vormittag von Sundtek »
Sundtek Support Engineer

sign2apple

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Re:low signal dvb-c
« Antwort #4 am: April 29, 2013, 10:02:05 Vormittag »
I tried the stick on my notebook without powerline, no improvements, same (bad) results. On some frequencies 40% and some 0%.
I have called my provider, but they won`t help me because the stick is not supported by them and my TV and internet connection provided by them work just fine.
Anny other suggestions, the stick is useless for me right now. :'(

Sundtek

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Re:low signal dvb-c
« Antwort #5 am: April 29, 2013, 11:49:47 Vormittag »
Well you need to see that you can get the noise from the Cable, the signal itself is definitely strong enough.
You might try to get some adjustable attenuator (there are some cheap ones available on the market for a few eur).

Otherwise as mentioned we will have some newer models upcoming which are using a different chipset which might improve the situation for you. As mentioned you are the first one having that issue with such a tuner.
Sundtek Support Engineer

sign2apple

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Re:low signal dvb-c
« Antwort #6 am: April 29, 2013, 12:17:34 Nachmittag »
Is this a type of http://www.kleinspul.nl/index.php?productID=2703&cat=879 you mentioned. For this amount of money I will give it a try.
Or can you give me some links to a such an attenuator (German webshops will be fine).
Thanks in advance.

Sundtek

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Re:low signal dvb-c
« Antwort #7 am: April 29, 2013, 12:20:20 Nachmittag »
Yes, that one might be okay. You might be able to find them a little bit cheaper I think
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sign2apple

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Re:low signal dvb-c
« Antwort #8 am: Juli 02, 2013, 08:34:44 Nachmittag »
Used an attenuator. Didn't helped mutch. :(

sign2apple

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Re:low signal dvb-c
« Antwort #9 am: Juli 25, 2013, 08:25:39 Vormittag »
Hello,

Any news about the tuner I send to you?

Sundtek

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Re:low signal dvb-c
« Antwort #10 am: Juli 29, 2013, 07:21:38 Nachmittag »
Yes, the tuner works perfectly, seems like you have some additional noise on your DVB-C line. We'll see if we can ship back another device with an upgraded chip version (but that's still no guarantee that it will help against the noise on the line)
Sundtek Support Engineer

robkds

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Re:low signal dvb-c
« Antwort #11 am: August 18, 2013, 02:06:36 Nachmittag »
Hello,

Any news about the tuner I send to you?
Did your new tuner work better? I bought a tuner this week and have many problems with frequencies between 420 and 460 MHz. All other work perfectly. My TV's (tested both) have no problem and good signals with this frequencies on the same outlet.

sign2apple

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Re:low signal dvb-c
« Antwort #12 am: August 18, 2013, 02:09:56 Nachmittag »
Haven't received my new tuner yet. So I can't tell you at this moment.

sign2apple

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Re:low signal dvb-c
« Antwort #13 am: September 20, 2013, 08:08:05 Vormittag »
Hello,

When do I receive my new tuner for replacement?

robkds

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Re:low signal dvb-c
« Antwort #14 am: Oktober 02, 2013, 09:17:29 Nachmittag »
Did your new tuner work better? I bought a tuner this week and have many problems with frequencies between 420 and 460 MHz. All other work perfectly. My TV's (tested both) have no problem and good signals with this frequencies on the same outlet.

My supplier changed the tuner for a new one and my problems are solved now. I hope you get your tuner soon.