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About Photon

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    RC-Cam Visitor
  1. There is no convention for 4-pole mini(3.5mm) AV jacks!!! I have found three different configurations among my cameras, monitor and video goggles. From the base of the male jack to the tip- it can be Ground, Video,Left,Right or V,G,R,L or R,G,V,L or ????. So if you are having problems getting things to work, this may be a source of some problems.
  2. I figured it would have to be more complicated . All the stuff I have found, has been related to data networks, and it appears they measure RSSI with software. Can you give me any links that will clue me and my multimeter in? What is the Oracle measuring when it compares the video signals?
  3. To measure RSSI, can I just take a DC voltage read between the two conductors of the RCA video out on the Rx? If so, what kind of range should I expect? I'm using the generic import 12v Rx.
  4. I'm with you on using the Oracle's manual mode, I even thought about using the video level adjust mode to compare the two signals back and forth rapidly:) This still leaves the extra variable of the two Rx's in the mix. Wouldn't it better to just use one antenna and one RX so that the only variable would be the antenna position? I thought that I would have an assistant move the Tx away from the ground station until the signal degraded, and then play with the antenna position looking for improvements. Since I'm not having to worry about flying the Tx, there is no problem messing around with the Rx.
  5. Of course. Variation in the Rx=another variable. Like you say "with microwaves everything matters". So for a proper test, I should eliminate the diversity box and just use one Rx and one antenna. With the balloon holding the Tx relatively constant, I can just record the video while trying different antenna positions, and then just edit the recordings to make side by side comparisons. Unless, you can recommend an affordable way for me to measure the video signal. Back to the idea of using the oracle to measure the signal differences- I could control for Rx variables by switching the Rx's from the tripod ant. to the ground ant. so that I could get a reading from both combinations.
  6. I thought that I could use the oracle to tell me which antenna had the best reception, as I do not have any testing gear. I figured that I would try different positions with identical antenna and see which one the oracle chose.
  7. I just received my diversity gear(thanks Vova), and would like to do some field testing regarding this antenna placement question. I have a 5' helium balloon to use as a Tx platform, so it will be possible to park the Tx at altitude and play with different Rx placements without worrying about flying a plane at the same time. I've got a 5dBi whip, a 8dBi patch, plus the original whips that come standard, all on 900mhz running through an oracle. If there is anything that Folks want me to try let me know.
  8. I wanted something that I can pan and tilt behind, so that I would have some protection for the camera as well as the P/T mechanics. Also water proofing possibilities, if cooling issues can be solved.
  9. That is definitely a concern. They make these in polycarbonate, which is tougher , but costs a bit more, and the hemisphere can not be made as tall. Acrylic has excellent optical characteristics and handles the environment fairly well. It will yellow over time, but I assume it will get scratched up long before it yellows. In what application were you using one of these?
  10. I agree, I'm skeptical, but willing to experiment. Plus you see dome cameras everywhere, so I assume they work. I'll report back to the forum when I get it in my grubby hands and can shoot some video through it.
  11. cleardomes. I just ordered a dome from these guys, they are made for cameras and claim that there is no distortion except for just around the base. It will be here in a couple of weeks, I'll report back then. Has anybody used anything like this? I don't know if it's worth the trouble, but the more money I have on my airframes the more worried I am throwing them up in the air. I want my cameras to see forward and down primarily, so they tend to be very exposed. I ordered the 1/8" acrylic which probably won't remain optically clear after ground contact, but it should protect my camera and P/T mechanics. With shipping it comes out to ~$50. Not cheap, but the idea of all my gear just hanging out there with no protection makes me nervous.
  12. Sorry, I didn't think about that, but the GentLED comes out of the UK.
  13. I looked a little further into this unit, and found one possible problem- "Cons: Main CON: Only supports Active-X/IE, doesn't work on anything else e.g.: firefox. Couldn't get video working even on my MAC's IE." from Newegg I need to get myself up to speed on all the variables with this idea before I start spending, but I'll stay in touch. Thanks, Joshua
  14. Brookes Leffler This guy has a lot of great gear, 360 degree servos, camera triggers(gentLED,CHDK), gear reduction hardware, frames, etc. I just ordered a few goodies, I only hear good things about this guy, and I'll be sure to report back when my order arrives.
  15. Does anyone have any thoughts about using a cellular broadband card and a internet camera like this. "The D-Link Internet camera includes a powerful built-in fully integrated web-server that contains its own IP address to act as an independent device". Couple this with a broadband cellular network card. I understand latency might be a hindrance to piloting, but with the advances in auto piloting that are coming about, this may not be an issue. I'm thinking about applications like pipeline inspection and surveying, where the requirements are long range and mostly straight (boring) flight plans. Being able to use the very extensive cellular networks would be quite attractive.
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