DX7-DX6 radios

[miami6]

How close can these two radios be to each other with out affecting their transmitting properties



I would like to use the DX7 for the Heli and the Dx6 for the gimbal pan/tilt/Yaw /shutter / Retracts with a 900mghz downlink system


I would lkie to be abale to use 2.4 spectrum technology for all the gear



any info if this can be done ?


Andres

[GGoodrum]

I'm doing exactly this with my Logo 10.

-- Gary

[miami6]

thanks gary


how close can you get the receivers before they interfere with each other ?


can i use both transmitters next to each other

[oscillator]

from an RF perspective - the 2 receivers could share the same antenna and have no issues. Both are receiving only. They each hear everything in range - other TX's, noise, and the intended signal. The receivers job is to separate out the intended signal from everything else. The fact that another RX is next to it makes no difference.

Same argument can be made for the transmitters. They only transmit. They could even share an antenna, transmit at the same time and cause no problems.

The problem arises when a transmitter and a receiver are close to each other. The transmitter signal is so strong that it overloads the receiver and the receiver can no longer separate its intended signal from the very strong signal of the nearby transmitter. This is called "front end overload".

As an example:
Today there are several cell phones being designed that will incorporate both Bluetooth and WiFi (both use 2.4GHz). Almost all of these designs use a single antenna (due to space) and a coupler to join the 2 radios to the single antenna. Both radios can RX at the same time, and both can TX at the same time. The only issue arises when one wants to TX while the other needs to RX. For this reason there are handshaking lines between the 2 radios and an arbiter to decide who has priority.

[AZ ChopperCam]

so here you have super hitech stuff and it all comes down to a good old fashioned "handshake"

:wink: