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Occasional Contributor
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Re: Fetch TV glitching / freezing and pixelated - free to air

hi Xcelplus

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Honoured Contributor
Honoured Contributor

Re: Fetch TV glitching / freezing and pixelated - free to air

Recording doesn't actually use any processing power on a PVR. 1's and 0's are just copied down to the harddrive verbatim from the broadcast. The processing comes from watching a recording (or live show) - this is only needed to be on one channel though at any given time.  

 

On watching recorded shows, Fetch TV has some extreme lockdowns on content (I believe its signed up for FTAs draconian (and ultra secret) requirements for Freeview. Nominally this is to protect copyright, but as its quite legal to record and view FTA TV in your own home now it all seems a bit silly). This protection goes so far as to render the exact same devices incompatible depending on where you buy them. Optus could relax this but so far have shown little inclination.

 

Regards  

 

Peter Gillespie

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Contributor
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Re: Fetch TV glitching / freezing and pixelated - free to air

It's also possible the bandwidth has increased?

It was getting very congested at one stage... and the speeds were right down.

Recent speed tests on my connection during congested times (~8 pm) show increased download speeds (~5 Mbps now v's ~2 Mbps earlier) which would reduce the likelihood of staggering significantly.

🙂

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Honoured Contributor
Honoured Contributor

Re: Fetch TV glitching / freezing and pixelated - free to air

@Xcelplus

 

Depends on what you're watching. If its a FTA broadcast channel then bandwidth isn't relevent. If its one of the Fetch channels then yes 2 Mbps is pretty close to the minimum possible bandwidth for watching those channels (not surprised you'd get break up).  5 Mbps should be enough though. 

 

Regards

 

Peter Gillespie

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Occasional Contributor
Occasional Contributor

Re: Fetch TV glitching / freezing and pixelated - free to air

Pixelation problems, we only have Freeview, our Fetchbox Mighty is only around 3 months old.  Live Central Brisbane, right next to a railway line, lots of new apartment buildings being erected.

 

HDTV is around 2 yrs old, had pixelation problems using straight antenna connection before box, only certain channels like 9Now, mostly ehen train bypassed the house.  

 

Antenna was replaced, relocated to highest point on roof. Pixelation on tv stopped but started again on fetch box.

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Re: Fetch TV glitching / freezing and pixelated - free to air

Sounds like you have an EMF problem mostly. Siting the antenna as far away from electromagnetic noise as possible might give you some relief?

 

Alternatively adding a masthead booster often boosts the signal enough so that you don't get pixelation. 

 

We live out in the suburbs only 14 Km from Melbourne but also suffer from pixelation if the masthead amplifier is not turned on. We have had this problem with every TV we've ever owned. It is possible to ignore the problem: which gets worst if you have a source of EMF e.g. The guy with the shortwave radio used to cause interference (he stopped eventually). Noise on the power line used to cause  interference (we installed a line filter). However simply boosting the signal slightly with a masthead amplifier fixed the problem for good. We've been using the same old masthead amplifier for about 30 years now. One of the best investments we've ever made. Saved a fortune in antennas.

 

We also tried upgrading the antenna, improving the cabling and raising the antenna higher all without much improvement.

 

Cheap masthead amplifiers are about $20 on ebay..

 

🙂

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Contributor
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Re: Fetch TV glitching / freezing and pixelated - free to air

It is possible for Optus to specify a box that boosts the signal a bit internally (inside the Mighty)... which would address problems such as these.

 

Very few people seem to realise exactly how effective a masthead amplifier is:

 

https://www.kogan.com/au/buy/alvin-22v-ac-150ma-power-supply-alvin/?utm_source=google&utm_medium=pro...

 

Better TV's usually have an amplifier circuit built in... but most cheaper hardware does not.

 

🙂

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Re: Fetch TV glitching / freezing and pixelated - free to air

http://www.smh.com.au/digital-life/a-clear-reception-for-digital-tv-20090922-g0oy.html

 

The article makes a lot of good points.

 

A good line filter is the Steitzer filter. It reduces line noise thus eliminating one common source of problems:

 

https://www.stetzerelectric.com/store/stetzerizer-filter/

 

A secondary advantage of line filters is that they also protect electrical equipment from spikes thus extending lifespan..

 

🙂

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Occasional Contributor
Occasional Contributor

Re: Fetch TV glitching / freezing and pixelated - free to air

Ok so you are recommending 1) Mast Head Amplifier 2) Line Filter? I understand 1 has to be installed on the Antenna on the roof, not sure about 2?  I could not believe the EMF disturbance from the train bypassing, electricity is invisible yet so powerful.  Thanks for all that info Xcelplus 🙂

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Re: Fetch TV glitching / freezing and pixelated - free to air

Hi,

 

A masthead amplifier can be installed inside or outside of the house.

However putting it inside near the TV is usually the best idea.

 

It is a powered device and has a small power pack which needs to be plugged into the nearest socket.

 

If you screw it onto the wall it is easy to find.

 

🙂