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Old Jul 05, 2012, 04:52 AM
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Question

What can be causing this (Eagle Eyes black&white video problem)


Any of you with idea what might be causing this kind of video problem?

Eagle Tree, Eagle Eyes generating noise (0 min 20 sec)


There are two 1.2Ghz video receivers hooked up to Eagle Eyes inputs and Fatshark goggles and Aiptek MPVR on the outputs. Camcorder that in any other configuration (with video splitter for example) is working flawlesly is recording (and displaying) this kind of picture only when hooked up to Eagle Eyes output. Fatsharks are showing correct picture all the time.

Already tried different output ports, other set of cables etc.
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Old Jul 05, 2012, 10:13 AM
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I have no experience with this hardware in particular - but 2 common generic causes to intermittant loss of colour content in analogue video are:

- current or voltage drop between video camera and display or recorder.
- conflicts in video signal processing and/or hardware components e,g, component to composite (or the other way round).
Old Jul 05, 2012, 11:12 AM
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I don't know what would cause it, but it almost looks like NTSC and PAL signals are being mixed.
Old Jul 05, 2012, 06:26 PM
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Very possible.......

Playing a PAL video camera signal through NTSC monitor can cause:

- rolling screen
- blank screen

Playing an NTSC video camera signal through a PAL monitor can cause:

- intermittent black & white frames
- a blank screen or
- what folk call in the trade “picture tearing”

You know the old definition for NTSCNever The Same Color Twice.
The definition stems from the color variance flaw - a well known problem in the NTSC format.
Old Jul 05, 2012, 08:07 PM
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Exactly what I was thinking, but the only way that makes sense is if the VRx's can be set to NTSC or PAL, which doesn't sound likely, they're usually able to handle both types of signals.

I would start by hooking up each VRx individually and checking the Aiptek to see what it looks like.

It just looks like the Eagletree is switching between the two RX's and one of them is the problem
Old Jul 06, 2012, 03:18 AM
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Quote:
Originally Posted by nkkromhof View Post
Exactly what I was thinking, but the only way that makes sense is if the VRx's can be set to NTSC or PAL, which doesn't sound likely, they're usually able to handle both types of signals.

I would start by hooking up each VRx individually and checking the Aiptek to see what it looks like.

It just looks like the Eagletree is switching between the two RX's and one of them is the problem
That's not the case, signal from both RX's is behaving in the same manner.
Without EagleEyes when one RX is connected trough simple video splitter to Fatshark goggles and Aiptek DVR everything is ok.
EagleEyes shouldn't change any of the video passing trough it, its just inspecting the quality of the signal.
Old Jul 06, 2012, 12:32 PM
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I understand that the ET is just a conduit, it's not supposed to do anything except pass the strongest signal through.

Having said that, yours appears to be defective or there's something that all of us don't know about the ET diversity controller. I would contact them to find out what they think, because you've eliminated the rest of the equipment.
Old Jul 06, 2012, 04:00 PM
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A low video level can cause this. Right after the synch pulse, there is a "color burst". This signal the presence of a color format NTSC. If undetected, the display devide switch to black and white mode. There is a video adjustment pot on the EE, turn it to max brightness and see if the input 2 does not bahave like this anymore.



Hugo
Old Jul 08, 2012, 09:09 AM
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Originally Posted by Hugeone View Post
A low video level can cause this. Right after the synch pulse, there is a "color burst". This signal the presence of a color format NTSC. If undetected, the display devide switch to black and white mode. There is a video adjustment pot on the EE, turn it to max brightness and see if the input 2 does not bahave like this anymore.



Hugo
Interesting idea, i'll try that but there is only one video adjustment pot for second channel.
Old Jul 08, 2012, 09:12 AM
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Yes, but if it work, you know your problem.

Hugo


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