Freq Differences?

[CAMOMAN]

So whats the reason you need a lower control frequency than a video frequency when flying FPV? Right now I am using Spectrum DX8 and 1.3ghz video and its working out to about 300 yards ? I am very new at this trying to figure all of it out??

[JCLs]

It all has to do with interference, and what should fail first video or control. If you outfly your control but still have good video, which should be true in your case, what does it do for you? You also need to understand how frequency harmonics can interfere with each other etc. If you are running 1.3 GHz in Texas (USA) you are required to have a ham radio license. I know many doing FPV do not have license but honestly the basic stuff you learn to go with the license helps answer questions like yours. With all the negative things going on surrounding FPV flying being completely legal right now is not a bad thing either.

Come down to Houston sometime and fly with us

On the iPad again,
JCL
AMA# 954079. KG5BBF

[CAMOMAN]

Working on the license now!!

[JCLs]

It is not hard, really. Good Luck!


AMA 954079 KG5BBF

[CAMOMAN]

Well Im ready to take it but no one offers a test around my city!!!! Rats!!!!!! wish you could take it online!!!!!

[JCLs]

I looked at Jasper, Lufkin, Beaumont, Woodville, Tyler and more. Nothing showing except lots in Houston. I took at the Masonic Lodge on Watonga as I had been flying over them and didn't have a clue they were giving tests there! A bunch of local FPVers go flying at the park across the street from them once in a while. Not a long trip and license good for 10 years!!


On the iPad again,
JCL
AMA# 954079. KG5BBF

[gwd1234]

I agree completely that the best plan is to follow the rules, but it doesn't seem to always be really clear what the rules are.

On this link, the ad for a 5.8 GHZ Fat Shark RTF package clearly says a license is required:
http://www.readymaderc.com/store/ind...oducts_id=1129

But Horizon Hobby is selling a 5.8 GHZ RTF package and they say that no license is required.

I can see on the AMA site where 2.4 GHZ Spread Spectrum is OK, but don't see anything about 5.8 - can you clarify this?

[daneger21]

Originally Posted by CAMOMAN

So whats the reason you need a lower control frequency than a video frequency when flying FPV? Right now I am using Spectrum DX8 and 1.3ghz video and its working out to about 300 yards ? I am very new at this trying to figure all of it out??

Im gonna say things are to close and space as much as possible. Also 1.3 and 2.4 have harmoics as someone else has stated. What size video tx? And filters on your video rx? What antennas are you using?

I fly an f450 with...
Gopro3+
Naza with gps(saw filter mod for use with 1.3video)
1.3 fpv gear
433 dragonlink

Upgraded antenna on my video tx but have standard antennas everywhere else. Ive gone to 1.5miles before getting alittle nervous and turning back.

See if there any mounting you can improve and/or any filters you can use to help your situation. IMO if you think your going to stick with 2.4 as your control, id plan on moving to 5.8 for video.

Good luck...I know I beat my head for awhile before it all "worked"

[JCLs]

Originally Posted by gwd1234

I agree completely that the best plan is to follow the rules, but it doesn't seem to always be really clear what the rules are.

On this link, the ad for a 5.8 GHZ Fat Shark RTF package clearly says a license is required:
http://www.readymaderc.com/store/ind...oducts_id=1129

But Horizon Hobby is selling a 5.8 GHZ RTF package and they say that no license is required.

I can see on the AMA site where 2.4 GHZ Spread Spectrum is OK, but don't see anything about 5.8 - can you clarify this?

There are 3 ISM frequency bands:

902 to 928 MHz
2.400 to 2.4835 GHz
5.725 to 5.875 GHz

In the past only spread spectrum (frequency hopping) point to point use was allowed in these bands and that included the radios most folks use for typical RC. Power limited to 1 watt max. I see Horizon selling a Fat Shark "FCC Certified" video system and saying no license required. I did some searching and can see a lot of proposed changes in 5.8 band but I cannot see how video can be used without license as it cannot be sent spread spectrum typically. Maybe somebody else has an answer. My understanding is a license typically required but also know if one can get FCC certification it makes a difference as long as no change of any type is made including power, antenna, anything connected to the transmitter. I am using non-FCC certified video transmitters and UHF for control so I need a license in any case. Even Horizon is selling some non-FCC certified stuff.

On the iPad again,
JCL
AMA# 954079. KG5BBF

[JCLs]

Just a quick note. You can send video on 5.8 very low power and very short range wo a license. That is what unlicensed version doing.