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Aug 13, 2010, 08:02 AM
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Discussion

What frequencies for FPV?


I've been trying to gather information for an FPV system. I understand that 1.2GHz is not allowed in the US. Also, 900MHz is for those with amateur radio licenses (??), and I'm using 2.4GHZ for my RC system. What A/V frequency is left? (short of changing my RC transmitter frequency). Thanks
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Aug 13, 2010, 08:23 AM
Crashomatic
CrashMeUp's Avatar
1280mhz with HAM license

5.8Ghz at max of 25mW is allowed without license and can be used with 2.4ghz radio
Aug 13, 2010, 08:48 AM
Suspended Account
In the USA 1240 is not alowed?

In Canada it is
Quote:
Originally Posted by CrashMeUp View Post
1280mhz with HAM license

5.8Ghz at max of 25mW is allowed without license and can be used with 2.4ghz radio
Aug 13, 2010, 09:04 AM
Registered User
MorrisM's Avatar
Quote:
Originally Posted by David22 View Post
In the USA 1240 is not alowed?

In Canada it is
Yes, it is, but on the edge of the allowable band. Is there a video transmitter that uses 1240Mhz?
http://www.arrl.org/files/file/Hambands_color.pdf

Morris
Aug 13, 2010, 11:54 AM
Suspended Account
Thats what i thought, but been told otherwise from a few people?

The lamate 1.2 tx and the "fox"digital display tx both work on 1240 as well as 1280.
(among others)

Quote:
Originally Posted by MorrisM View Post
Yes, it is, but on the edge of the allowable band. Is there a video transmitter that uses 1240Mhz?
http://www.arrl.org/files/file/Hambands_color.pdf

Morris
Aug 13, 2010, 12:03 PM
Suspended Account
Quote:
Originally Posted by David22 View Post
The lamate 1.2 tx and the "fox"digital display tx both work on 1240 as well as 1280.
(among others)
Well, to be more specific only the 1W Lawmate Tx works on 1240MHz, the 500 and 200mW don't.

Cheers,

Sander.
Aug 13, 2010, 12:17 PM
Suspended Account
oh ya 1 watt lawmate to be exact

the 800 , 1 watt and 1.5 watt 1.2 "fox" tx's work on 1240

the 300mw 1.2 tx from RV also works on 1240
Aug 13, 2010, 12:26 PM
Registered User
Quote:
Originally Posted by MorrisM View Post
Yes, it is, but on the edge of the allowable band. Is there a video transmitter that uses 1240Mhz? http://www.arrl.org/files/file/Hambands_color.pdf
Yes, 1240 MHz is the border, and when you transmit video at a given frequency, it disturbs communications both above and below the given frequency by a few MHz. (These are called side bands.) Thus, to avoid transmitting ANY harmful interference below 1240 MHz, you should not select your transmitter's 1240 MHz channel.

The other border is a hair under 1300 MHz, giving plenty of room for transmitters that offer 1280 MHz settings.

That's the "do everything by the book" answer.
Aug 13, 2010, 03:49 PM
Registered User
MorrisM's Avatar
I was just looking at the frequency band chart, and noticed that 1240 is not legal for novice license users. You must be general or higher. 1280 is the only channel available for novice.
Aug 13, 2010, 10:48 PM
Suspended Account
In Canada you just need a basic for 1240.

Quote:
Originally Posted by MorrisM View Post
I was just looking at the frequency band chart, and noticed that 1240 is not legal for novice license users. You must be general or higher. 1280 is the only channel available for novice.
Aug 14, 2010, 01:40 AM
I discovered our local school is on 72 MHz,

http://www.cityfreq.com/callsign/wqba946.html

Not far off the RC channels,

http://rcsource.hobbypeople.net/faqs/freqlist.htm
Aug 14, 2010, 08:45 AM
Registered User
The FCC regulations in the US are somewhat confusing, and I'm now even more confused. The bottom line is "is a 5.8GHZ transmitter of 500mw legal here in the US for FPV (without an amateur radio license)?" In the 5.8 GHz area are there power limitations for non-hams? Thanks
Aug 14, 2010, 08:49 AM
Registered User
Sorry. Also, what is the max power of 2.4 MHz for a non-ham operator of FPV allowed in the US ?
Aug 14, 2010, 12:28 PM
Earth's Mightiest Hero, KC9TBO
Zahnarzt's Avatar
Quote:
Originally Posted by minklein View Post
Also, 900MHz is for those with amateur radio licenses (??),
You can use 900MHz in the US without a license. Just keep your Tx power at or below 500mW. Actually, with household electronics these days sticking around 2.4-5.8GHz, the 900MHz range is mostly empty around me.
Last edited by Zahnarzt; Aug 14, 2010 at 03:35 PM.
Aug 23, 2010, 07:51 PM
KJ4YYJ
EugeneFlorida's Avatar
CH1 910 MHz (USA) 500mW RF output power

Note: All transmitters shipped to any addresses within US territory will have only the Channel 1 (910 MHz) available.
In order to use it within USA an amateur radio license is required.

Any illegal operation and/or changes made by the user to the transmitter will be totally the user's responsibility.
http://hobbywireless.com/cart/index....products_id=71


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