I know that most countries have legislation in terms of radio / video transmitters. I also know that many people do not always comply with this legislation.What are your experiences and opinions with video transmitters?
1. Frequency2. Power3. Range4. Range with Antenna tracker.5. Effect on GPS signal.6. LAWI know that there is no reason to discuss range since the law says in line of sight when you fly with RC. But still there is also some who "accidentally" gets to fly just a little outside the LOS.I have recently been in contact with a company who produce video / data transmitters.Any one in here who has experience with these transmitters.1.
Jordi,
Come once again !
Pl. elaborate bit more, what I could make out from your lines is that the amplified output power of ur 2.4GHz radio is 1W, range may be more than tens of miles, Hoo !
I'm using 1.2Ghz@1Watt and .9Ghz@500mW, Oracle diversity and two 8dB patch antennas(i only fly in Mx). =P Using a R/C TX of 2.4Ghz Spektrum with an amplified signal of 1Watt and antenna of 14dBi (patch). The range still unknown, but is a lot ...
In the past I have used 900Mhz but that has issues, well in fact all of them do, I am currently awaiting some gear from a friend at the BBC that he thinks will cover our needs very well. But the problem will still remain with what frequencies we are eventually allowed to use. Of course the higher we go in frequency the harder it becomes! On the flip side you can get more antennas in your pocket.
Polish army is known for ordering a few UAVs at precisely 5.8GHz. Probably just to avoid public 2.4 and be able to use several KW transmitters, but otherwise 5.8 is known to be oversensitive to anything including rain, pine forest multi-path interference and who knows what else.
I think that encryption is overkill and there are no point using it. But the system are on marked and price are not much more than others transmitters.
Gary,
Are you using video tx in your system, if yes, what do you use?
About the 900 MHz I understand that it has better range than the 2,4 GHz. How about the 5,8 GHz compared to the 900 and 2,4 GHz.
Another important thing to consider is the included encryption option on some of those transmitters and receivers. FCC rules specifically forbid any encryption on 2.4ghz other than for remote control or telemetry. I would recommend steering clear of included encryption altogether just to avoid a potential hassle.
Comments
Come once again !
Pl. elaborate bit more, what I could make out from your lines is that the amplified output power of ur 2.4GHz radio is 1W, range may be more than tens of miles, Hoo !
http://www.futurehobbies.com/index.php?option=com_virtuemart&pa...
Gary,
Are you using video tx in your system, if yes, what do you use?
About the 900 MHz I understand that it has better range than the 2,4 GHz. How about the 5,8 GHz compared to the 900 and 2,4 GHz.
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