ATTENTION All AV Receiver / Processor Owners with STB connection.

EASY EMI's at HiFiMART.com
Dirac said:
No. I was not highlighting hdmi vs optical for Dts 5.1.
Down the line Stbs might deliver 5.1 Dts MA hd sound and then optical might not be an option. I am saying this because we might see 4k transmissions in future, may be after 5 years or so. If they then have the bandwidth on a satellite channel for 4k , then they might also give hd audio.

Some worries are best left unattended. And this lightning thing exactly falls into that category.
Let me add another worry like this one.

Solar flares that erupt from Sun periodically, are highly energetic particles that potentially can short all electronic connections on a satellite. So the satellites have protective shields.
What if they pass straight through the atmosphere and enter our AVR? There is definitely remote chance as people are talking about even power disruptions in such a case.
And shall we worry about shielding our electronic equipment to meet this eventuality??
Click to expand...

I think you have not read my OP and my linked post, I don't want to elaborate it again. My point is not on all STBs, not on all DTH service providers, it is very specific and not based on sarcastic solar flares ideology it was based on true occurrences and based on the case study by a service engineer of high end AV brand.

You mean to say we don't have to protect or take precautionary measures to protect the AV equipment especially the AVRs from this kind of breakdowns for a technology that might come after five years in DTH transmission and STBs. (Till date we are getting only 720i and not even 720p video if I am not wrong. Most of the programs in HD channels are upscale from SD and not native HD).

Will we not wear seat belts for the ratio of fatal accidents that take place in our country in comparison with our population. Can we say some worries are better left unattended?. That way AV equipment failure due to surges, in which lightning strike is also one of the cause, is very high in comparison with its population than the above.

R. Balagopalan.
 
Ok. Firstly, solar flare disrupting electronics is not sarcastic ideology. You can just google the effects of solar flares.

Secondly , we get 1080i from our hd settop boxes and not 720i. Hd itself means 720p.

Thirdly your seat belt analogy is good.
But I feel that it more akin to using a stabilizer to protect the AV equipment than about not using hdmi to protect against lightning strikes.

There will always be more people in this world who scare us in more remote and intuitive ways. And it is always prudent to only worry about the clear and present dangers in my opinion. :)
Thanks.
 
gauthamnaidu said:
im looking for more..planning to construct one for myself using an engineers help...
Click to expand...

HI, Please note that providing lightning rods is like inviting lightning so you have to be 100% perfect in passing it to the ground without any lags or flaw. So it is important to provide minimum of two groundings and the conductivity between the air terminals and ground to be checked periodically. So a professional / engineers guidance / advice is must. Otherwise it is better not to provide lightning arrester.
 
rbalagopalan said:
I just happened to read the Thread "Attention ONKYO owners" which talked about Receiver failure. In this context I felt opening a separate thread would benefit / safe guard the AV Receiver / Processor of many users.

In the wake of HD transmission of Satellite channels we all must have gone for HD set top boxes and duly hooking it up with our AV components to benefit from the 5.1 Audio transmission by the channels.

Please be aware the STB is more vulnerable for Lightning strikes and throwing surges to our much costlier AV Receiver / Processor. This can directly result in failure of Power Board, Main Board, HDMI Board and some cases Display Board too. Imagine the extent of damage, my god unbelievable isn't it :sad:

WHAT IS THE WAY OUT?

Only copper involved connection which can conduct current can cause this damage. So do not connect your Receivers / Processors with the STB by HDMI and CO-AXIAL cables as they use copper to transmit signal.

As all the HD channel providers transmit only 5.1 Audio, Optical cable is more than enough to transmit 5.1 signal. Hence Optical connection to the receiver from STB is harmless.

HDMI can be given directly to TV, of course now TV becomes vulnerable but it is inevitable and to an extent TV can tolerate this I think so, as all TV manufactures would have foreseen and faced this long ago and have some protection built in. If any one can throw light on this it will be help full.

Even assuming some thing happens to TV it is lot easier and cheaper to restore it than our AV components.

Thanks
Click to expand...

Sir, the optical cable you are referring to here needs to be hooked into the Optical S/PDIF port at the back of the STB. Am i correct?
https://www.flipkart.com/mx-1216-fi...attr=color&sattr=cable_length&st=cable_length
is this the appropriate cable?
 
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chakrs said:
Thank you! I found one in Flipkart. (https://www.flipkart.com/mx-1216-fi...attr=color&sattr=cable_length&st=cable_length) Can you please tell me if this is the correct cable in this context?
What should be done for the TV then?
Click to expand...

yes it is the same cable.
Look for Amazon Basics optical cable / Toslink which is good and cheaper options.IMO.
I use the HDMI Male to Female Adapter/Extender cable whenever there is rain out side/end of the day / Going out of town i use to remove the cable which will be easy to access.
Normally the HDMI cable is connected to STbox and back of the tv it is not easy to reach the end of HDMI due to poor access and poor visibility of the connector.
But above HDMI adapter/Extender is not going to help/Save you when you are watching TV.
 
Thanks a lot for the clarification. Yes going forward I will also need an extender as I will also have access problems. After I wrote to you I came across something called hdmi Surge protector. I will have to review more though for availability of it in India.
 
chakrs said:
Thanks a lot for the clarification. Yes going forward I will also need an extender as I will also have access problems. After I wrote to you I came across something called hdmi Surge protector. I will have to review more though for availability of it in India.
Click to expand...
may be you can keep an eye on Something like this let the cost comes down and more user experience
 
I have done the followings in my setup, although I don't have an AVR but still it might be of some help to others.

1) I have put a 2.4 GHz isolation transformer
14970-d2f46d5829c0bd282426fd0a6da6a587.jpg
just before my TataSky settop box. This provides an electrical isolation of the settop box, hence no more lightning issues and this will work for terrestrial settop boxes too.

2) The LNB that picks up the signal at the dish, is powered by the settop box, if it's a normal LNB then it's 13v in horizontal polarization and 18v in vertical polarization, incase of a super LNB it's 19v. Since I had put the isolator in the incoming cable, I had to put a power injector for the LNB for my settop box to work.

3) The next issue was drop in signal quality due to galvanic loss. I replaced the standard coax cable supplied during installation with a Quad-Shielded Coax cable, to improve signal strength and quality, also a 70dB gain LNB to replace the standard 50dB LNB.

4) I have an Isolation transformer powering my TV and Settop box.

The above steps gave me electrical isolation as well as EMI reduction (since coax cables are notorious for picking up power line EMI through their shield when run parallel to power cables) in the vicinity of my setup.
 
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reachkalyan.kr said:
may be you can keep an eye on Something like this let the cost comes down and more user experience
Click to expand...

That is known as AOC, Active Optical Cable. It is not a pure optical connection since it carries the power and clock and H/V Sync wires. Only the RGB Channel data is through fiber optic. An HDMI to MultiMode Fibre Optic converter would be the ideal solution.
 
filmguy said:
has anyone tried these?

https://www.aliexpress.com/item/HDM...htning-full-HD1080p-suported/32372723090.html

https://www.aliexpress.com/item/HDV...emote-wakeup-for-MP3-players/32838305338.html
Click to expand...

I use a similar one (meant for RJ45 connector) installed before my internet router. It's gives a peace of mind but doesn't really help in getting rid of the huge amount of EMI the internet line carries in, which effectively reduces the router's efficiency in terms of network speed.
 
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