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-   -   Split screen technical explanation (https://www.dvinfo.net/forum/jvc-gy-hd-series-camera-systems/51894-split-screen-technical-explanation.html)

Robert Niemann October 8th, 2005 09:40 AM

Quote:

Originally Posted by John Mitchell
SSE can be temperature dependent.

Does that mean, that the JVC is a winter only camera? Or exclusive for summer shots? :-)

Marty Baggen October 8th, 2005 10:23 AM

Time to start beating my dead horse again....

If temperature is a problem, are we talking environmental temperature (external), or is the problem stemming from the relatively high temperature the chips themselves are generating?

In the final analysis, we may find that 1/3", HD, progressive chips are going to have some serious design challenges due to their density.

IF temperature is the root cause, any camera utilizing this CCD design, could see performance and lifespan issues.

Steve Mullen October 8th, 2005 02:31 PM

Quote:

Originally Posted by John Mitchell
Here's the latest technical snippet - SSE can be temperature dependent.

So now instead of actual experience or data -- we have "technical snippets."

Which is followed by posts that start talking as though this "snippet" were fact. Which leads to our poor horse being dragged out of its grave.

I assume a snippet is a full stop below an old fashioned rumor. :)

Douglas Spotted Eagle October 8th, 2005 02:58 PM

Quote:

Originally Posted by Marty Baggen
Time to start beating my dead horse again....

If temperature is a problem, are we talking environmental temperature (external), or is the problem stemming from the relatively high temperature the chips themselves are generating?

In the final analysis, we may find that 1/3", HD, progressive chips are going to have some serious design challenges due to their density.

IF temperature is the root cause, any camera utilizing this CCD design, could see performance and lifespan issues.

Marty, I might have an answer for you. I've got my HD100, and it's been damn cold at night already, dipping to the low 20's and high teens. I'll leave it out in the car in a box, and we'll see how it does in the a.m.

Marty Baggen October 8th, 2005 03:47 PM

Quote:

Originally Posted by Steve Mullen
So now instead of actual experience or data -- we have "technical snippets."

Which is followed by posts that start talking as though this "snippet" were fact. Which leads to our poor horse being dragged out of its grave.

I assume a snippet is a full stop below an old fashioned rumor. :)

I appreciate the sarcasm, but with no offical comment from JVC, and many of us contemplating a purchase, I think there is plenty of license to at least throw out some intelligent theories.

You have used your share of conjecture as well... and it to be honest, I think it is thought-provoking and insightful.... but your perspective doesn't escape the "technical snippet" label.... and that's not a bad thing!

Speaking only for myself, I am simply trying to make a smart purchase.

Steve Mullen October 8th, 2005 05:37 PM

Quote:

Originally Posted by Marty Baggen
Speaking only for myself, I am simply trying to make a smart purchase.

Why not buy from B&H who give you 7-10 days to try the camera -- and give you a great price?

I'll be in LV next week and I'll try leaving it in the sun for an hour and then shoot as I suspect if there are is any temperature issue this should expose it.

Now I don't think it will be a CCD sensitivity -- although they likely get hot. It is most likely the 6 A/D converters. One hopes each L/R pair is in one chip to minimize temperature differences.

Of course, we need to keep within JVC temperature guidelines.

Marty Baggen October 8th, 2005 07:10 PM

Steve... see if performance is affected by having the camera operational for an extended amount of time.

It looks like we have a good explanation for the SSE on another thread.

John Mitchell October 9th, 2005 09:20 AM

Quote:

Originally Posted by Robert Niemann
Does that mean, that the JVC is a winter only camera? Or exclusive for summer shots? :-)

That's quite amusing Robert. Seriously it meant neither. I apologise but by temperature dependent I meant some cameras (not all) are not being properly set up to operate without SSE over the whole expected operating temperature spectrum for the camera. My bad - I didn't bother to explain - I was running short of time.

During the setup process, the the ability of the circuits to balance both sides of the screen is supposed to be tested over a range of operating temperatures - from here on in I'm just guessing - if that's not done properly the camera may past QC in the factory but not in the real world.

It does not mean that SSE may be more or even less prominent in hot conditions or cold conditions, although I wouldn't rule that out. Steve - it may even mean your camera works better in hot conditions, although the ambient temperature would probably have to be pretty high to make a difference to the operating temperature of the circuit. I do know the JVC engineer was complaining that many cameras in the latest shipment had not been set up properly and therefore he was rejecting them.


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