Technical Help Page

Estimated Range Estimator for FPV Click to open.


Experiencing reduced range of your 1.2/1.3GHz video system when using it with 433MHz UHF RC system?
You might consider using a 433MHz notch filter.

Experiencing interference with your 433MHz UHF RC system of your when using it with 1.2/1.3GHz video system?
You might consider using high pass filter allows 1.2-1.3GHz

Experiencing GPS issues with your video system?
Click here to reading this forum thread.

Troubleshooting your wireless system.

1. Make sure the Tx (transmitter) and Rx (receiver) are set to the same channel/frequency.
2.Power for the Tx and Rx should be between 10.5 - 13.6 VDC, as  lipos voltage can go below that.
3. Make sure the video and ground wires of the camera is connected to the video and ground wires of the transmitter. (See Example Here)
4. Check the camera by connecting it directly to a display monitor to make sure the camera is not faulty, or try different camera if you have other.
5. Important, make sure you use the AV cable that came with your receiver, other cable might look the same and fit, but internally they are wired differently.
6. If your receiver has the "A/B" switch. leave it on factory default unless the use of this switch is required in the instructions.

Channels available on 900 Mhz systems are:
CH1-910Mhz CH2-980Mhz CH3-1010Mhz CH4-1040Mhz (USA customers will have only CH1-910 MHz available) Click here for transmitter channel configuration.

Basic Video Receiver and Video Monitor Conenctions A.K.A. "Ground Station".

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Basic Video Transmitter and Video Monitor Conenctions

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Channels available on Lawmate 2.4 Ghz systems are:

CH1-2410Mhz CH2-2430Mhz CH3-2450Mhz CH4-2470Mhz CH5-2310Mhz CH6-2330Mhz CH7-2490Mhz CH8-2510Mhz (USA customers will have only CH1-2410, CH2-2430 MHz available)
lick here for transmitter channel configuration The channels available on the 5.8 GHz ImmersionRC 7 channels transmitters are: CH1-5740 CH2-5760 CH3-5780 CH4-5800 CH5-5820 CH6-5840 CH7-5860 Click here for the 5.8GHz ImmersionRC 7 channels DIP swtiches position

What else do I need to know about flying a FPV system?

Don’t fly too low when your model is too far. It migh cause your model to crash.
When installing your system into a model, try to keep your wireless video system as far as possible from the R/C system.
Always keep your a/v transmitter in a well ventilated place. NEVER confine your a/v transmitter where there is no air flowing, otherwise it can overheat and permanently damage it .
For more useful information visit our FAQ page.

What is the best FPV system?

Answer: There are many things to know to help you to select the best system. For further information visit our FAQ page

Understand the confused terms and variations for SMA connections

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7. Plug and Play Transmitter Functions:

How to adjust the built-in microphone's volume. Just punched the clear shrink wrap on top of the volume controller by using a needle or something with a sharp pointed end.Then with right sides of its or small flat head screwdriver gently turn clockwise to increase the volume, or counterclockwise to lower the volume.

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Poor video reception or range can be caused by many factors such as

Low quality receiver and transmitter
Stock whip antennas must to be in the same position straight vertical. If one antenna is straight vertical and the other is leaning to any direction, it will aftect the performance.
Multipath is a very common issue.

What is Multipath, and exemples.
A good set of circular polarized antennas is the best way to deal with multipath issues.

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How to obtain 11.1v from a pack with 4S or more.

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How to connect a 12V or a 5V camera to a 12V transmitter.

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If you want to connect the camera to the transmitter without soldering, see the two illustrations below.
Here is an example with our cameras FPV520, HW650, CS550, KX520, KX515 and KX420. (Not all cameras have audio)

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Video Receiver  

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Oracle diversity receiver.

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 Lens Chart

Camera Lens F.O.V. (Field Of View) chart.

1.7mm lens has approximate 170 degree field of view
2.1mm lens has approximate 158 degree field of view
2.5mm lens has approximate 147 degree field of view
2.8mm lens has approximate 130 degree field of view
2.9mm lens has approximate 127 degree field of view (Natural Human eye)
3.6mm lens has approximate 92 degree field of view
4.3mm lens has approximate 88 degree field of view
6.0mm lens has approximate 78 degree field of view
8.0mm lens has approximate 58 degree field of view
12 mm lens has approximate 28 degree field of view

Please take a look at our FAQ page for more information.