View Full Version : 2.4 GHz TX 200 mw
05-29-2009, 02:55 AM
My unit came today and I wanted to check it out.. the camera board I was planing on using is from a 2.4ghz system. the old TX had 5 wires connected and the new RV TX has 4. power ground video and sound.
so I wanted to ask that question first.
I tried a video camera with RCA outs. used a 4.7 volt transformer to power the TX. through the supplied cable.... I cannot get any video to transmit. when I use the same receiver
but a different camera with a 8 mw TX the video is fine.
Is there a problem with color cameras working with the 2.4 200 mw TX from RV?
thanks in advance
05-29-2009, 03:31 AM
used a 4.7 volt transformer to power the TX. through the supplied cable....
I have the 500mw tx but i think the cable is the same. The supplied cable has a 5V regulator built in the end that the tx plugs into. The cable needs a 9-12V supply to be able to ouput 5V. Your 4.7V is too low.
If you don't use the cable Make SURE! you don't give the tx over 5.5V directly. 12V will instantly destroy it (I know by experience:)).
I attached a pic of the cable with the end opened up: look the same?
05-29-2009, 11:51 AM
yes thats the same cable minus the circuit cover. so I will look for a
6-9 volt transformer to try it with later on today. Thank you !
I appreciate your help!
EDIT my instructions say do not exceed 10v into the RCA voltage regulator. 5v into the TX if wired directly ..
why does the old TX have 5 wires 2 whites , a red , a black and a yellow. anyone have a clue on that one? if It works without it . I could just cut the wire off the camera board I assume?
05-29-2009, 04:51 PM
well I am not sure what is going on here. the TX image is perfect with my camcorder. the exact same camera transmits at 8 mw perfectly.
but I cannot get a clear picture with the RV TX. Am I missing something?
are the RCA connectors that come with the TX grounded in some way to the power supply ground. I soldered the video connections to the camera board and the picture is just crappy. like looking through a fog. the stock camera TX has 5 wires and the new TX has only 4. I reconnected everything back to harness that came with the TX and picture is perfecta again with the camcorder. maybe this camera is just not compatible. also the image is visible on channel 1 and channel 2 of the receiver.
anyway .. any ideas would be great
05-29-2009, 05:11 PM
What RX brand you have? Because is possible that the RV Tx works on different frequency, modulation type or bandwidth than the RX.
05-29-2009, 05:46 PM
its a 4 channel 2.4ghz off brand RX.. but the picture is beautiful from my camcorder.. just like it was plugged right into the TV..so the RX receives from the RV TX just fine..
either I am missing something on the installation or the camera is not compatible.. too low power video signal for the TX.. the other 8mw camera that I did not take apart transmits perfectly to the same RX..
05-29-2009, 06:06 PM
I said that because some Tx-Rxs use different frequencies and modulations to transmit-receive. So your system may work perfect as is. But if you try to add a different brand device it will not work together. I think this is what is happening here.
05-29-2009, 07:53 PM
well it wouldnt be the TX OR RX it would be the signal going into the TX
from the camera. RCA outs on sony handycam works great. I have another BW camera I am going to try .. but I need a break from this for a day. My back is just killing me.. If that doesnt work I may just have to get a camera from RV that he says works fine with the TX 2400-200.
I have a hunch that the video signal . (even though it reads 4.6 volts..) coming from this camera is the problem .. or the fact that the stock TX mini chip has 5 wires instead of 4 on the RV TX .. maybe it has an amp to boost the signal before the it enters the stock TX that is built into the camera.
I thought video signal was a video signal when it comes out of the camera.
maybe the refresh rate is 50 hertz and and the sony cam is 60 hertz?
is that what you mean..
the RX has a tag on it.. says channel 1 is 2410 .. which the RV is supposed to be fixed at for US sale..
05-29-2009, 08:11 PM
Modulation type and bandwidth... Even at the same "central" frequency those parameters can be different. The video standard is another history. Also tha audio subcarrier can be diferent.
05-29-2009, 11:11 PM
ah . I see... guess I need a matching camera.. then.....
thanks for the help
05-30-2009, 02:42 AM
lol, you need to google a little. you need a matching receiver for that Tx.
05-30-2009, 01:19 PM
I don't see how you can say that.. when I used the supplied RCA cables a 5 volt transformer plugged into the power connector that came with the 2400-200 TX , a Sony model number DCR-TVRV22 handy cam NTSC video camcorder and its video/audio out jacks plugged right into the TX 2400-200 RCA connectors it came with.. it transmits and receives perfect video and audio. Its only when I wire it to the cheap color video/audio mini surveillance camera do I get a foggy image. Its not the soldering either. I re-soldered the wires back to the RCA connectors the TX came with. And again the sony handheld video camera transmits a perfect picture/ audio The TX also transmits to completely different 2.4 GHz 4 channel receiver with a built in monitor. Perfectly .. So I need a compatible mini camera like the KX- 171 or KX-191
Now do you understand ?
05-30-2009, 02:37 PM
Yes, now I understand.
05-30-2009, 08:16 PM
I am having such a great day.. parts that flew off from an old housefly 2 helicopter from megatech.com shortly after my son got the unit as a gift several years ago .. I wrote them about the brass gear that flew off shortly after we just got it working.. frustrated I put the unit away .. my son found it and I contacted the company.. the sent me the parts free of charge.. so my and my son can get that working this summer..
then to top it off I get a 120 dollar refund from my doctor.. not sure why but its enough to order the KX-171 or the KX-191. I will get them ordered right away... if I can be assured it will work with the TX 2400-200 transmitter..
I assume it will .. can you let me know Vova ? I sent you an email too..
06-05-2009, 12:35 AM
Alex... you are right and I owe you an apology.. my TX
fixed at 2.410 and the RX I was trying to use is 2.414..
now I need to get an 8 channel RX .. so maybe I can use my other TX wireless cameras with the same RX...
sorry for my ignorance Alex....
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