Espritmodel.com Telemetry Radio
Reply
Thread Tools
Old Sep 04, 2010, 08:29 AM
Registered User
Manila, Philippines
Joined Jul 2004
1,203 Posts
Discussion
Is it safe to use a 2.4 GHZ Wireless video transmitter on Spektrum DSM2 2.4 ?

Is it safe to use a 2.4 GHZ Wireless video transmitter on Spektrum DSM2 2.4 ?

I plan to use a 2.4 GHZ Wireless Video Transmitter on Spektrum DSM2 , it works perfectly on the ground. to make sure that the Spektrum do not use the same frequency as the 2.4 GHZ Video transmitter, I first turn-on the Video transmitter, before turning on the Spektrum Radio.

I plan to installed a 2.4 GHZ Video Transmitter on my 500 size Electric Helicopter.

I know it will works, but I am hesitate to use it.
lazy-b is offline Find More Posts by lazy-b
Reply With Quote
Sign up now
to remove ads between posts
Old Sep 04, 2010, 09:39 AM
In love with aviation
flying-things's Avatar
Joined Apr 2010
387 Posts
It should be safe provided you start the spektrum tx after the video transmitter. Have you tried range checking the spektrum tx with the video tx on? I'd give that a try before the flight. I've never seem someone use a video tx at my club, so I don't have any personal experience. I'd try a beater plane first though- just to be safe.
flying-things is offline Find More Posts by flying-things
Reply With Quote
Old Sep 04, 2010, 12:14 PM
Registered User
Leszek_K's Avatar
United Arab Emirates, Dubai, Dubai
Joined Jul 2007
205 Posts
It's not that simple. A strong signal from video Tx will most probably block an input circuit of an RC receiver and that is an end of a story. Even 1.2GHz Tx or rather it's 2nd harmonic does it.
Leszek_K is offline Find More Posts by Leszek_K
Reply With Quote
Old Sep 04, 2010, 01:06 PM
Inciting Riots
village_idiot's Avatar
Joined Dec 2006
9,687 Posts
Not really the best way to use video and 2.4Ghz control. I would suggest a 5.8Ghz or 900Mhz video system, and even then you may get poor performance in the control system. One of the biggest factors is how tightly the video output is filtered for harmonics, most of the affordable stuff is so poorly filtered that 5.8Ghz would be nearly as bad as 2.4Ghz.
village_idiot is offline Find More Posts by village_idiot
Reply With Quote
Old Sep 04, 2010, 06:42 PM
Registered User
ebill3's Avatar
United States, WA, Puyallup
Joined Oct 2004
5,965 Posts
Quote:
Originally Posted by village_idiot View Post
One of the biggest factors is how tightly the video output is filtered for harmonics, most of the affordable stuff is so poorly filtered that 5.8Ghz would be nearly as bad as 2.4Ghz.
Why is that? By definition, harmonics are multiples of the fundamental frequency, not divisions.

In any event, the OP ought to take a look at the Aerial Photography forum - perhaps post there.

Bill
ebill3 is offline Find More Posts by ebill3
Reply With Quote
Old Sep 04, 2010, 07:56 PM
Inciting Riots
village_idiot's Avatar
Joined Dec 2006
9,687 Posts
Trust me, noise spurs go both directions. Twice and half need aggressive filtering
village_idiot is offline Find More Posts by village_idiot
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold Eflite Blade DSM2 2.4 GHz Spektrum LP5DSM Transmitter Steve_A_Reno Aircraft - Electric - Micro & Indoor Airplanes (FS/W) 1 Jun 07, 2010 09:38 AM
Discussion 2.4 Ghz Spektrum radio effect over 2.4 Ghz video albertocvr FPV Talk 31 Nov 19, 2009 02:38 PM
For Sale Parkzone 2.4 GHz DSM2 Transmitter and 4 AA Batteries schwimmair Aircraft - Electric - Micro & Indoor Airplanes (FS/W) 1 Nov 16, 2009 07:41 PM
Sold Parkzone 2.4 GHz DSM2 Transmitter and 4 AA Batteries schwimmair Aircraft - Electric - Micro & Indoor Airplanes (FS/W) 1 Oct 27, 2009 07:49 PM
For Sale Spektrum DX5E 2.4 Ghz DSM2 Transmitter hcsk8ter Aircraft - General - Radio Equipment (FS/W) 3 Mar 14, 2009 09:01 PM