Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




531 posts

Ultimate Geek
+1 received by user: 83


Topic # 82561 2-May-2011 08:55
Send private message

Howdee.

Just wondering if anyone has any thoughts on an issue I am having:

We have a situation where TV1 and TV2 are suffering form bad reception whereas when jumping to other channels the others all work fine.
When looking at the signal information the bit errors jump through the roof on the TV1/2 whereas the others just seem to truck along with no errors whatsoever.

Same is happening on both TV's in the house (using the same signal feed). Its a terrestrial feed from Waitakere Ranges.

I would have thought if one channel is getting a dodgy signal then they all would be suffering.

I rescanned the channel listings last night - which made no difference at all - was stabbing in the dark for ideas.

Any ideas as to what in the world is going on?

Cheers
Troy

View this topic in a long page with up to 500 replies per page Create new topic
 1 | 2
1872 posts

Uber Geek
+1 received by user: 113


  Reply # 464371 2-May-2011 09:03
Send private message

Given the strong winds and rain last night I would guess it's weather related.
I used to get it all the time when it rained and was caused by water getting into the Antenna's junction box and then the coax feeder. Problem solved with new antenna and coax which is all weather proof. Another souce of problems can be wet trees in the vicinity of the antenna..



531 posts

Ultimate Geek
+1 received by user: 83


  Reply # 464373 2-May-2011 09:10
Send private message

That is the thing - this has been an issue for a while now, it is only recently that it occurred to me that it is only happening on TV1 and 2...so this isn't specifically associated with the bad weather this weekend.

 
 
 
 


6504 posts

Uber Geek
+1 received by user: 521

Trusted

  Reply # 464393 2-May-2011 10:16
Send private message

E3xtc: I would have thought if one channel is getting a dodgy signal then they all would be suffering.


The channels come on different (one of three) frequencies.  It's not entirely impossible that your aerial is better on some frequencies than others.  A thorough check of the aerial condition and then cabling/splitters and end terminations etc would be the way to proceed.



531 posts

Ultimate Geek
+1 received by user: 83


  Reply # 464405 2-May-2011 10:50
Send private message

Thanks for that - can anyone recommend anyone in the West Auckland/Titirangi area that might be best suited to assist with this? I previously had Teletech come out; and am almost 100% sure that things are worse after their attempts :(

25597 posts

Uber Geek
+1 received by user: 5372

Moderator
Trusted
Biddle Corp
Subscriber

  Reply # 464449 2-May-2011 12:22
Send private message

Freeview has 3 MUX's - TV1 and TV2 are on the same TVNZ MUX. If you're experiencing issues with TV1 or TV2 that are signal related odds are you'll see the same issues on the other channels on the TVNZ MUX that includes TVNZ7 and U.



531 posts

Ultimate Geek
+1 received by user: 83


  Reply # 464450 2-May-2011 12:24
Send private message

So at the end of the day, does that mean that this is still likely to be a signal issue; one that my only option is to try and improve the signal we are getting (ie as mentioned above - cables, connectors, aerials, etc)



531 posts

Ultimate Geek
+1 received by user: 83


  Reply # 467068 9-May-2011 12:01
Send private message

Great to see that yesterday and all through the weekend TVNZ's signal was crap as usual, whereas TV3 was solid and strong.

Connections all "look okay"...Is there anything I can do (as a layman) to make this better or am I at the mercey of the powers that be at TVNZ? :(
Or maybe just need to throw some more money at someone who knows what they are doing?

6504 posts

Uber Geek
+1 received by user: 521

Trusted

  Reply # 467072 9-May-2011 12:08
Send private message

If your aerial is not the best and receives some signals stronger than others that doesn't mean the signal is at fault. Without investigating further you don't know that the signals are being sent at different power levels.

What is your aerial setup:

-Is it new, is the cabling good, are the terminations at either end ok etc?

- Are you in a good strong reception area and are you using an amplifier etc?

You are feeding two TV's - How is the cable being split etc?



531 posts

Ultimate Geek
+1 received by user: 83


  Reply # 467090 9-May-2011 12:50
Send private message

The aerial isn't new - it's about 10 years old - but we did put a new one up on the roof and it made no difference (so subsequently took it down).
Same goes for the cabling in terms of age - it all looks okay....the cables look in good condition, the termination points seem to be in good nick.

Reception wise we are at the bottom of a gulley, so not super by any stretch...but certainly strong enough to consistently get solid 95/100 reading on signal strength on the TV3 signal...TVNZ jumps up to that point but fluctuates between 60-85 on average with bit errors coming through and killing the picture.

We are running a powered amplifier

We are running 2 TV's. The splitter is in the roof. So it goes from aerial through roof cavity to splitter, then approx 7m run to one TV and then 20m run to the other TV. Signal issues are encountered on both TV's; neither are any better than the other.

Any thoughts are greatly received :)

Jaxson: If your aerial is not the best and receives some signals stronger than others that doesn't mean the signal is at fault. Without investigating further you don't know that the signals are being sent at different power levels.

What is your aerial setup:

-Is it new, is the cabling good, are the terminations at either end ok etc?

- Are you in a good strong reception area and are you using an amplifier etc?

You are feeding two TV's - How is the cable being split etc?



148 posts

Master Geek


  Reply # 467112 9-May-2011 13:38
Send private message

From Waiatarua, the 3 frequencies are 538MHz, 570MHz, and 666MHz. Make sure that all of your frequencies are set to these.

Although as sbiddle says, if TVNZ7 and U are fine, it won't be a signal issue though

Pixelation on the only 720p channels sounds like it could be an issue with the graphics in the set(s). Are the two TV's set the same model (with inbuilt tuner), bought at the same time?

6504 posts

Uber Geek
+1 received by user: 521

Trusted

  Reply # 467143 9-May-2011 15:08
Send private message

They are all 1080i now so that's not it sorry.

Very good point about the frequencies. Make sure you're tuned to the strongest signal possible for those channels. In locations where there are potentially multiple transmitters within range, the TV can sometimes try to get those channels from a weaker source. Try this, even if you have to manually tune the TV's.

1872 posts

Uber Geek
+1 received by user: 113


  Reply # 467177 9-May-2011 16:21
Send private message

We are running a powered amplifier

Presumably your power amp is at the masthead?
Is the DC power supply being passed thru the splitter to the amp?
Not all splitters pass DC one one or both connectors.
Only real test is to try new antenna and coax direct to one TV with no splitter. Or get a field strength test done.
You haven't said if TV7 and U are also pixellating. They are on the same MUX.

148 posts

Master Geek


  Reply # 467201 9-May-2011 17:36
Send private message

OMG tvnz have gone to 1080i? Next think they'll be going (back) to AC3 ;-)



531 posts

Ultimate Geek
+1 received by user: 83


  Reply # 467378 10-May-2011 07:48
Send private message

Thanks everyone for the feedback - I will try to manually configure (check) the frequencies that are currently being used.

To answer a few of the questions:

TV's are different models.
Pretty sure TVNZ7 was all over the show on the weekend also - I gave up and just settled with TV3 in the end (which was solid as a rock)
The amp is just one that is plugged into the outlet/wall plate

So if the frequency comes up with nothing, then I am thinking that I will have to get someone around to run cable directly to the set (bypassing the splitter etc) and get some proper tests done :)

Muchas Gracias fellas!

Banana?
4057 posts

Uber Geek
+1 received by user: 860

Subscriber

  Reply # 467409 10-May-2011 09:23
Send private message

Have you tried it without the amplifier plugged in? Sometimes they can make it worse (they amplify everything, good and bad). Also, see if you can just bypas the splitter (join the in and out cables together with a joiner) and see if that makes a difference - with and without the amplifier.

I'm certain that if you are getting good signal on the other 2 muxes then The TVNZ one can be sorted.

 1 | 2
View this topic in a long page with up to 500 replies per page Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Phone prices rising as users move upmarket
Posted 24-Nov-2017 17:16


Talking net neutrality on RNZ Nine-to-Noon
Posted 24-Nov-2017 12:11


Air New Zealand experiments with blockchain technology
Posted 23-Nov-2017 15:39


Symantec selects Amazon Web Services to deliver cloud security
Posted 23-Nov-2017 10:40


New Zealand Ministry of Education chooses Unisys for cloud-based education resourcing management system
Posted 22-Nov-2017 22:00


Business analytics software powers profits for NZ wine producers
Posted 22-Nov-2017 21:52


Pyrios strikes up alliance with Microsoft integrator UC Logiq
Posted 22-Nov-2017 21:51


The New Zealand IT services ecosystem - it's all digital down here
Posted 22-Nov-2017 21:49


Volvo to supply tens of thousands of autonomous drive compatible cars to Uber
Posted 22-Nov-2017 21:46


From small to medium and beyond: Navigating the ERP battlefield
Posted 21-Nov-2017 21:12


Business owners: ERP software selection starts (and finishes) with you
Posted 21-Nov-2017 21:11


Why I'm not an early adopter
Posted 21-Nov-2017 10:39


Netatmo launches smart home products in New Zealand
Posted 20-Nov-2017 20:06


Huawei Mate 10: Punchy, long battery life, artificial intelligence
Posted 20-Nov-2017 16:30


Propel launch Disney Star Wars Laser Battle Drones
Posted 19-Nov-2017 21:26



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.