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.


Filter this topic showing only the reply marked as answer View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 | 3 | 4


188 posts

Master Geek
+1 received by user: 10


  Reply # 1627943 12-Sep-2016 15:32
Send private message quote this post

First of all, a few weeks ago everything was fine.

 

Having said that, I have been streamlining some more today. I was wrong in saying it was an amplified 5-way splitter, it is only 4 way, one is the aerial input, silly me. :)

 

I now have RF from amplified box going direct to the TV, the Panasonic recorder, Magic TV recorder, and Freeview Plus T2100.

Until today the aerial for the two recorders were coming from a non-amplified splitter from the main amplified splitter. The reason for this is I had tried to use the forth slot as an aerial for my FM radio. Alas, the VHF aerial is gone so this no longer works.

 

Still getting occasional pixilation, only channel 32. If the theory of deterioration was true, channel 28 would be suffering first but that is fine. According to Magic TV, the TV3 signal is only 97% strength.

 

It's possible my original problems stemmed from aforementioned daisy-chaining. It was when I added the T2100 to the mix that the problems had begun, but now even if I remove it from the set up, there is still light pixilation, though definitely not as bad.

It's possible there are two separate issues by coincidence. On Wednesday we had quite a storm. I think the aerial may have moved. However, if that is the case, wouldn't all the channels be affected?


4702 posts

Uber Geek
+1 received by user: 2102

Subscriber

  Reply # 1627961 12-Sep-2016 15:54
Send private message quote this post

Some channels are stronger than others so might not be bothered by an overall weakening of the signal. At least that is how it appears on my set-up. If your reception is right on the edge for any reason, a further decrease of the signal might affect some channels but not others. I experienced this myself not long ago and the problem turned out to be a faulty cable. It attenuated the signal enough to affect some channels, but not all. Some frequencies may also be more vulnerable than others.

 

 





I reject your reality and substitute my own. - Adam Savage
 


 
 
 
 


1389 posts

Uber Geek
+1 received by user: 65


  Reply # 1627965 12-Sep-2016 16:01
Send private message quote this post

      >Still getting occasional pixilation, only channel 32.<

 

Isn't that Rotorua?  Pretty good to get a signal from there in Christchurch? tongue-out


216 posts

Master Geek
+1 received by user: 43


  Reply # 1628006 12-Sep-2016 17:31
Send private message quote this post

RustyViewer:

 

It's possible there are two separate issues by coincidence. On Wednesday we had quite a storm. I think the aerial may have moved. However, if that is the case, wouldn't all the channels be affected?

 

 

No, tuners do not have the same sensitivity over their full frequency range.  They are usually most sensitive somewhere in the middle of the range, and less sensitive at higher and lower frequencies.  So the channel frequency matters.  Also, not all transmitters necesarily have the same power output.  I would have expected that at a major site like Sugarloaf that all the transmitters were pretty much the same though, but I can not find any power figures to check on that.


1710 posts

Uber Geek
+1 received by user: 226

Subscriber

  Reply # 1628037 12-Sep-2016 18:03
Send private message quote this post

Sugarloaf DVB-T muxes, on 28, 32, 34 and 36, are all 47 dBW.





Ross

 

Spark FibreMAX using Mikrotik CCR1009-8G-1S-1S+

 


Speed Test


216 posts

Master Geek
+1 received by user: 43


  Reply # 1628174 12-Sep-2016 20:59
Send private message quote this post

One thing to bare in mind is that some of your recorder boxes will have dual (or more) tuners.  The TV, unless it is a very unusual one that does picture-in-picture with an extra tuner, will have only one tuner.  So, how many aerial inputs do each of these devices have?  The TV is likely one, for its one tuner.  But the recorder boxes also likely only have one input, but feed two or more tuners from that one input.  In which case, they will have an internal splitter, splitting the signal up to send it to each tuner.  So if there are dual tuners, each of those dual tuners will get slightly less than half the signal strength available at the box's aerial input (slightly less as splitter circuits are not 100% efficient).  If there are three tuners and one aerial input, each tuner will be getting slightly less than one third of the input signal.  As a result, the TV will normally be getting at least twice the signal level at its single tuner that any of the recorder boxes is getting at any of their tuners.  Hence the recorder boxes may struggle with insuffient signal while the TV is just fine.  So, how many tuners do each of those boxes have?




188 posts

Master Geek
+1 received by user: 10


  Reply # 1628184 12-Sep-2016 21:20
Send private message quote this post

I have had no noticeable problem with Family Feud tonight. I have also recorded some of The Edge to check but everything seems Ok for the moment. I think my streamlining has made a difference. :)




188 posts

Master Geek
+1 received by user: 10


  Reply # 1638438 21-Sep-2016 23:28
Send private message quote this post

Was quite bad on Family Feud today. The Problem mainly appears to occur late afternoon/early evening. It was raining tonight however which may or may not have accentuated the problem. Is no one else getting this problem on channel 32 stations?

 

Did some checking re: Freeview news and realised Parliament TV was still on 22 and it had been switched to 31 in July. So I retuned ALL the stations, not just the ones on channel 32, for both my Panasonic recorder and TV. I don't know if that will make a difference though.


534 posts

Ultimate Geek
+1 received by user: 130


  Reply # 1638491 22-Sep-2016 07:15
One person supports this post
Send private message quote this post

You said in an earlier post that you had 97% signal strength, by any chance does it measure signal quality or ber ( bit error rate )

 

In the digital world the quality is more important.

 

Having an amplifier can make things worse some times.

 

I recommend that you get an aerial installer with the proper tools i.e. digital field strength meter to make sure the aerial is in the correct spot.

 

UHF can be a funny beast, on one site I was on in the back of beyond I had an aerial on top of a 2.5m pole struggling for signal, dropping it down to about 1.5m made the needle bend in the right direction and have signal to spare.

 

Conversely too much signal can have the same effect and not enough signal.

 

Without the proper tools you can not fix it properly or reliably.

 

John





I know enough to be dangerous




188 posts

Master Geek
+1 received by user: 10


  Reply # 1641521 28-Sep-2016 00:16
Send private message quote this post

I've found the cause of the problem. Unfortunately it is the Dish TV T2100. This is what I had introduced to the mix recently. Even after I disconnected the aerial from the box and it was ONLY IN STANDBY, I still kept getting the intermittent interference. The moment I pulled the power out of the box, things appeared to come right. For the first time, Family Feud had perfect picture again and The Edge also seems fine though I haven't watched it too much. I'll keep my eye on it but that appears to be the culprit. Why would a Freeview plus box be interfering with the aerial signal just by being on standby?


1840 posts

Uber Geek
+1 received by user: 101


  Reply # 1641545 28-Sep-2016 08:33
Send private message quote this post

It may have a faulty power supply which is radiating interference. Could also be bad solder joints on the circuit board.

 

 


25 posts

Geek
+1 received by user: 19


  Reply # 1641598 28-Sep-2016 10:46
Send private message quote this post

I have a marginal signal and antenna setup, I get intermittent pixilation with the following:

 

Children's toys that have electronic sounds being used close to TV

 

microwave in kitchen being used about 10m away from TV

 

Peugeot remote key lock when used to lock or open car

 

 

 

-

 

Goes to show the number of ways UHF can be interfered with.




188 posts

Master Geek
+1 received by user: 10


  Reply # 1641978 28-Sep-2016 17:16
Send private message quote this post

It's early moments but I've just tried it with a different power adapter with similar specs to the original. It has appeared to work!




188 posts

Master Geek
+1 received by user: 10


  Reply # 1647690 8-Oct-2016 14:34
Send private message quote this post

To continue this saga, with the T2100 out of the picture, I am still getting some defects on my TV, so I suspect something isn't quite right with the aerial, it may have gone off direct line to sugarloaf. I noticed it shakes in the wind too. Is this normal?

 

The original power adapter which came with it (1000amp) made things worse but lowering it to 500amp has removed the problem, though there may not be enough power for things like USB recording which I don't do.


1710 posts

Uber Geek
+1 received by user: 226

Subscriber

  Reply # 1647699 8-Oct-2016 14:44
Send private message quote this post

You give no details re: distance to Sugarloaf, whether you have line of sight or even type of antenna being used. I would remove the distribution amp (no details on that either), assuming you are reasonably close to transmitter you should be able to split 8 ways fine without amps.

 

Best thing is to get an installer who has a spectrum analyser.





Ross

 

Spark FibreMAX using Mikrotik CCR1009-8G-1S-1S+

 


Speed Test


1 | 2 | 3 | 4
Filter this topic showing only the reply marked as answer 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 »

Behind Spark’s slow-burn 4.5G plan
Posted 26-Jun-2017 16:23


Red Hat unveils production-ready open source hyperconverged infrastructure
Posted 23-Jun-2017 22:10


Whatever ailed Vodafone broadband … seems to be fixed
Posted 23-Jun-2017 14:10


VMware NSX Meets Stringent Government Security Standards with Common Criteria Certification
Posted 22-Jun-2017 19:05


Brother launches next-generation colour laser printers and all-in- ones for business
Posted 22-Jun-2017 18:56


Intel and IOC announce partnership
Posted 22-Jun-2017 18:50


Samsung Galaxy Tab S3: Best Android tablet
Posted 21-Jun-2017 12:05


Wellington-based company helping secure Microsoft browsers
Posted 20-Jun-2017 20:51


Endace delivers high performance with new 1/10/40 Gbps packet capture card
Posted 20-Jun-2017 20:50


You can now integrate SMX security into Microsoft Office 365, Google and other cloud email platforms
Posted 20-Jun-2017 20:47


Ravensdown launches new decision-making tool HawkEye
Posted 19-Jun-2017 15:38


Spark planning to take on direct management of all consumer stores
Posted 19-Jun-2017 10:03


Qrious acquires Ubiquity
Posted 14-Jun-2017 12:21


Spark New Zealand prepares for 5G with Nokia
Posted 14-Jun-2017 12:16


The future-proof 10.5-inch iPad Pro
Posted 13-Jun-2017 18:16



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.