There are over 100 channels within the 5.8GHz frequency spectrum between analog and digital FPV techniques (DJI FPV & Shark Byte). I included all these channels in a desk and plotted a diagram so you’ll be able to simply look them up and select the very best sign for video.
By figuring out the place the channels are positioned within the 5.8GHz frequency spectrum, the bandwidth of every channel, and the way a lot separation there may be between channels can assist you keep away from video interference.
- 5.8GHz analog – 30MHz
- DJI FPV 25mbps – 20MHz
- DJI FPV 50mbps – 40Mhz
- Shark Byte – 27MHz
Each band has a novel set of frequencies, particular person frequencies may be repeated on different bands however the units stay distinctive.
Analog FPV System
|Band||CH 1||CH 2||CH 3||CH 4||CH 5||CH 6||CH 7||CH 8|
Back within the days, the vast majority of video transmitters solely supported 8 channels, and completely different manufacturers would use completely different bands for his or her VTX’s. However fashionable VTX’s are actually suitable with a number of bands, in order that’s not one thing to be involved about anymore.
- Band A: Team BlackSheep (TBS), VaryVideo, SpyHawk, FlyCamOne USA
- Band B: FlyCamOne Europe
- Band C (R): Raceband
- Band E: HobbyKing, Foxtech
- Band F (Airwave): ImmersionRC, Iftron
- Band D: Diatone
- Band L: Low band
- Band H: High band
Digital FPV System
|Band||CH 1||CH 2||CH 3||CH 4||CH 5||CH 6||CH 7||CH 8|
|Shark Byte (FCC)||5660||5695||5735||5770||5805||5878||5914||5839|
|Shark Byte (CE)||5735||5770||5805||–||–||–||–||5839|
Choosing a channel
Although channels in a band are typically fairly properly separated, the neighbouring channels might nonetheless be overlapping one another and trigger interference.
Raceband has the widest separation at 40MHz between channels, and doesn’t have any overlap, bit this doesn’t imply that Raceband can help all 8 pilots on the identical time. We must take “IMD Frequency” into consideration.
This article explains that are the most effective channels to make use of for FPV, and it additionally explains what IMD is.
Basically in order for you a number of individuals to be flying on the identical time, we can not simply depend on a single band, however correctly select from all accessible channels to attain the most effective end result.
You can also want to vary your channel when flying with different pilots, with the intention to keep away from interference from each other. Remember to be thoughtful to different pilots, discover out what VTX channels are getting used earlier than you energy in your FPV drone. It may be onerous to make pals at a flying area when individuals lose their finest racing drone since you jumped on their video channel!
Making certain your VTX and VRX are on the identical channel
You should guarantee your 5.8GHz Video Transmitter (VTX) and the video receiver are working on the identical channel with the intention to set up a dependable video hyperlink. Some channels from completely different bands are very shut to one another, simply sufficient to getting an image, however that doesn’t imply you’re on the suitable channel.
Antenna and Placement
Getting a dependable VTX is necessary, however the antenna and its placement may be simply as necessary in relation to video sign high quality. Here is my information on selecting the most effective FPV antenna.
It is sweet observe to check your FPV setup earlier than putting in it in your craft, not solely to substantiate every thing is working – but additionally as a result of it may be troublesome to entry the buttons on the VTX as soon as it’s within the stack. We strongly advise you nonetheless, to construction your construct so that you CAN entry the button and alter your VTX settings. However this is probably not so essential in case you are utilizing Smart Audio or TRAMP – a technique to change VTX settings by way of the OSD. Find out extra about Smart VTX Control right here.
Do not beneath energy your VTX
Be conscious that VTX have completely different working voltage, a small VTX for TinyWhoop for instance, will doubtless take 3V to 5V, the place some have a wider working voltage starting from 7V – 24V. You may be capable of energy a 7V VTX with 5V, however efficiency (vary) could possibly be massively impacted.
Interference work round / troubleshoot
It is rare, however you could sometimes expertise atmospheric interference, to fight this attempt utilizing distant channels like E4 and E8, or one other mixture that provides a large hole between frequencies. Some interference is likely to be energy associated, see right here for a extra detailed article on fixing FPV video points
5.8GHz WiFi sign makes use of frequency between 5170MHz – 5835MHz, this might intervene with our FPV sign. You may expertise noisy or lack of sign when flying close to populated residential and enterprise areas, the place there may be WiFi alerts round.
It’s finest to make use of a channel as far-off from this band as attainable, for instance Raceband 8 (5917MHz) can be a great possibility.
In truth, your VTX can have an effect on WiFi sign too, and your 1W VTX’s may be nice WiFi jammers 🙂 If your private home WiFi drops out while you’re working in your quad, it’s more likely to be attributable to the VTX. If this occurs, merely transfer your channel to a better frequency.
Although there are a lot of channels and energy degree accessible from VTX today, you need to at all times discover out what’s allowed in your nation earlier than transmitting. Many locations prohibit 5.8GHz output energy to 25mW except the person has a license.
5.8GHz FPV bands like “L”, “U” and “O” fall solely outdoors the authorized frequency allocation within the US and Europe, making them unlawful to make use of (and probably many different international locations too). That’s why you received’t see VTX with these channels once you purchase from legit RC retailers.
Not to say these bands are a lot decrease than the usual 5.8Ghz bands, and your antennas are in all probability not exactly tuned for these low frequencies. My recommendation is to steer clear of VTX’s that provide these unlawful frequencies, actually a VTX that has 40 or 48 channels is greater than sufficient.
- Jan 2015 – Article created
- Dec 2019 – Updated, added “finest observe”
- Mar 2021 – Updated information, created channel diagram, modified URL