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Nov 07, 2009, 12:44 PM
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#1 |
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Registered User
Join Date: Sep 2009
Posts: 8
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434 MHz video transmitter knocks out 433 MHz remote trigger
I have my camera set up for pole photography.
Got a 434 MHz video transmitter sending the video out signal from camera to pocket TV Got a 433 MHz receiver (Phottix Cleon) on the camera to trigger. Cleon transmitter at the base of the pole Photo's: http://www.flickr.com/photos/antonputtemans/4056845516/ http://www.flickr.com/photos/antonputtemans/4053374179/ I can't use the Cleon when the video transmitter is broadcasting, even when not connected to the video out port. When I hold the video transmitter 3 foot away from the Cleon receiver it works. Why is that and what can I do about it, apart from dangling a 3 foot video cable with the video transmitter down the pole? |
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Nov 07, 2009, 01:08 PM
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#2 |
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Worn-out the seat of my pants
Join Date: Dec 2006
Location: Dorset UK
Posts: 226
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Its because the video transmitter is deafening the trigger receiver because it is basically the same frequency and very close proximity. The trigger receiver will be sensitive to any RF close to 433/434 and it's hearing a huge signal due to the proximity. (RF power drops-off very quickly with range) I don't think any amount of amount of clever FR filtering would help.
There is really no solution other than to separate the items as you say. |
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Nov 07, 2009, 03:50 PM
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#3 |
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Hooked and loving it!
Join Date: Oct 2004
Location: Forster, NSW, Australia
Posts: 5,305
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Yup, this is the same classic problem when people try and use the same (or close) frequencies such as 2.4Ghz for the up and down tasks. The down Tx is totally drowning the (relatively) weak upward signal...
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Nov 07, 2009, 04:49 PM
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#4 |
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Ya, THAT Ira
Join Date: Jan 2006
Location: Coupeville, Wa
Posts: 4,642
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What they just said.
I would switch to a conventional RC based control set up for the camera. I use 434 MHz down link on mt 40ft mast with an RC TX for camera control. Never a hickup. |
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Nov 07, 2009, 05:44 PM
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#5 |
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Registered User
Join Date: Sep 2009
Posts: 8
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Hiya Ira!
Can you tell me what you are using to trigger your camera? I have a Nikon D5000 up so not much options... |
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Nov 08, 2009, 01:00 AM
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#6 | |
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Ya, THAT Ira
Join Date: Jan 2006
Location: Coupeville, Wa
Posts: 4,642
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Quote:
Hi Anton, I am just using a standard RC RX and a servo trigger but there are plenty of options out there. Here is a link to one..... http://www.blip.com.au/ |
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Nov 08, 2009, 11:32 AM
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#7 |
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Registered User
Join Date: Oct 2006
Location: Trois-Rivieres
Posts: 187
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Why are you using a vid TX at all ?!?!?!?!?!? A RCA wire dandling along the pole would be a perfectly reliable way to get your signal into the googles/monitor and there would be less batteries/antennas/glitches to care about.
My .02 Canadian $ Alain. http://photo-video.over-blog.com/ |
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Nov 08, 2009, 08:26 PM
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#8 |
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Hooked and loving it!
Join Date: Oct 2004
Location: Forster, NSW, Australia
Posts: 5,305
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I will often have an assistant set up the pole (eg on the roof of a building) while I set up the groundstation in a different location, so a video downlink is worth the effort.
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