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jalves

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About jalves

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    RC-Cam'er

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    Portugal
  1. Hello again, Try the cap mod and, as you suspect, the problem didn't go away. It seems all the same. Doing a frame to frame analysis of the recorded video , I detect a trend: 3 "tinted" frames, 4 clean frames, 3 "tinted" frames, 4 clean frames and so on... I don't own a oscilloscope, but I can trace the video signal through a pc oscillo, do you think this can help your analysis? The pianoDVR is able to record the clean frames, so why some frames appear "tinted" as if the base colors are separated from each other? A limitation of the Realtek RTD1262PA chip?
  2. Thomas, Excluding the rc-link (camera connected directly to the input of the piano dvr) the results are the same, good image free of disturbance for all the cameras except this one. The camera is known as FPV530HD, it was made in Korea, has very good detail (edit:540L) but I had to tweak through the osd to obtain rich vivid colors (the default options gave an brownish image). Clues? Thanks again.
  3. Hello all, Once more, I need your assistance I bought the so called piano DVR ( link ) and it work as it should (record video through AVin to the hd) with all my cameras except from the camera mounted in my main FPV model Through this video you can see the problems. I don't have a clue except that this is related to the color, the camera provide a interlaced signal (but the other cameras tested also do it) could this be the problem? In rcg the opinions are divided some people don't have problems and love the little dvr, and others claim some problems, mainly associated to pal cameras (which I also use, and 4 of them don't show any problem) or to hungry power hard drives (could be the case, 500GB). Any idea about the causes?? Thoughts? Comments? Thanks.
  4. You can find 1,2~1,3GHz video stuff in www.electronicarc.com
  5. Help me out, bad copy or a "lemon"?
  6. Just want to add that I bought a 7'' lcd television with AV in, no problem with airwaves based receiver, but the little gem was incapable of displaying the image received by the GP707, what a "lemon" receiver this is!
  7. Ok Thomas, I won't forget to post here if I solve GP707/JVC problem. Many thanks for your help.
  8. Ok, One last question: Is all the video splitter the type I post above?? If I want a GOOD active video splitter, what should I search for (the problem here is they all have the same specs). Thanks again for your help.
  9. I use three 75Ohm in series, connect signal to ground. Only noticed that the principal horizontal video bar slide down a bit. All the tears in video maintained (also color and brightness problems)
  10. IIRC only 3 of them. Please, say How many and the value of the resistors We need, I'll buy it tomorrow (is plain night here).
  11. This tests were done without any resistor added, only the original wires, no modification at all. As you said, we need to recap, that's what I did. Top on my list is to see if we can make the GP707 work with the camcorder, with no other video devices. If we fail doing that, there is no need to move on. Acknowledge! Per comparison, the GP707 has always a darker image than his FS634rx counterpart, the Y degrades MUCH more the GP707 image than the FS634rx, in this one, is almost unnoticed.
  12. I understand that you are using a video camera and Tx combination that does not work with your camcorder when the GP707 is used (some minor video tearing due to video content) --This is correct, I may add colour render problems and image horizontal bar deviations to the right Additional problems (lack of color, contrast, etc.) are seen on the recorded image when you 'Y' the camcorder with your glasses (note: a common issue with simple Y'd video cables). --Correct, but also true when GP707 is connected directly to JVC camcorder, not true when I use the FS634rx, even with Y But this Rx works fine with your glasses or video monitor, --Also correct, although the camcorder maintain the problems above reported even while Y'd with the camcorder. Not true, the image is grainier than with FS634rx when have the JVC splitting the signal Furthermore, the camcorder works fine with the AWM634 Rx. You have found that the camcorder's video input is Hi-Z. --Correct! Thomas, I want to thank you once more for your time and patience. Furthermore, I made a video self explanatory where you can see all the things I am trying to put here in words. http://www.vimeo.com/3045408 If you have a vimeo account, I invite you to download it and see it at 720x576. Thanks again.
  13. You are right, I forgot to report that I didn't use the GP707 for this test, my fault, sorry. This test was conducted with a FatShark/Airwave 634 Rx With this Rx, the only problem of the jvc when in Y is in the upper area of the screen, where the osd puts the info, I think the osd mess with the sincronism. I will redo the test with the gp707.
  14. Since I only have here a set of 75Ohm resistor (the other ones are a to high resistance) I try to terminate all the items in my video chain with them. All my gear (video receiver/ FPV goggles/Jvc miniDV) has infinite Resistance in the video input/output. 1st experiment: I Solder a 75Ohm resistor between signal and ground in the Video receiver output. attached the cable and add the Y splitter, got aprox. 75 Ohm in both outputs, then connect the goggles and in the other output fall to aprox. 50Ohm. Then connect the JVC, the problems became a slightly worst, the goggles show good image as usual. 2nd experiment: Add 75Ohm in the three devices, the JVC image become crude, with colour problems and banding, goggles good as usual, maybe a slightly grain in image. One more data, the JVC connected directly to the video receiver output show no problem at all. Tomorrow I will buy the resistors to complete the tests suggested by you Thomas Again, Thanks OT Will I be "burned" with this type of O-scope ? OT
  15. Terry, Waht UHF system are you using with the optocouplers?
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