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Old Feb 20, 2012, 06:13 AM
Joined Mar 2011
788 Posts
Build Log
Rangelink Revision History

-----------------------rangelink tx-------------------------
v1.03 First Customer Release.
1.fixed interference with vrx 1.2GHZ system.
2.support futaba radio 12ch ppm mode (only at teacher mode).
{Only tested with 12FG}
v1.27 add new feature link quality indicator / rf rssi indicator selectable (on rssi pin)

1. Pan /Tilt will be map to ch8/ch9 ,for 8ch RC radio.

-----------------------rangelink rx-------------------------
v1.06 First Customer Release.
1.change rssi(packet rate) to rf rssi. range (0-3.2V)
2.reduce the fs setting request(3-6s).
New batch<after 2012-03> change the internal buffer, improve the driving circuit capacity. and improve the internal RC filter, because some OSD input very low impedance,like eagletree OSD PRO less 5Kohm. and some OSD input not include filter (HW filter or digital filter), so it will make the rssi unstabitily.

v1.24 add new feature link quality indicator / rf rssi indicator selectable. (rssi pin)

1. output some info over the uart port, just like link status, rssi ect.
if you need more info about uart protocol ,just email to us.

// --------------------------------------------------------------------
// UART CFG: 9600bps 8+N+1
// <<tx ascii
// STX + 'm' + packetRate + mixInfo + Vrssi + checkSum + ETX
// 1 +1 +2 +2 +2 +2 +1 (11bytes)
// mixInfo<2:0> = g_extra3bits (reserved).
// <3> = FS status.
// <4> = reserved(for testing).
// <5> = FS enter setting status.
// <7:6> = reserved
// Vrssi = 3.2/256 * RSSI.
// checkSum >
//unsigned char CheckSum (unsigned char tab[],unsigned char length)
// unsigned char sum = 0;
// unsigned char i;
// for(i=0; i<length; i++)
// {
// sum += tab[i];
// }
// sum = ~sum + 1;
// return sum;
// --------------------------------------------------------------------


Note: if you wanna to upgrade,please upgrade both(tx & rx) to the newest version.<for tx v1.27/rx v1.24>

New feature link quality indicator / rf rssi indicator selectable:

make rangelink tx enter advanced binding mode, first beep end:
the two ways switch
high power mode ==> link quality indicator
low power mode ==> rf rssi indicator

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Last edited by sid.huang; May 12, 2014 at 04:43 AM.
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Old Mar 12, 2012, 10:24 PM
Joined Mar 2011
788 Posts
RC filter for OSD analog input: (new batch no need)

about futaba radio 12ch ppm support:
Just support 12ch teacher mode.
"When in the 12ch teacher mode the ppm pulse is normal but variable repeat time."

futaba radio when works at 12ch teacher mode,it needs a student ppm signal input, so if you have a x1000 headtracker, you can make a cable as attach file shows, it will make rl works...

Other Ideas:
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Last edited by sid.huang; Mar 22, 2012 at 04:18 AM.
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Old Nov 30, 2013, 04:03 PM
Registered User
Joined Nov 2013
3 Posts
I want to buy the rangelink set for 185$. Please tell me what else will I need to make it run with a futaba 14sg and a phantom FX-61 (cables, antennas, jacks etc)
I also have the boscam goggles connected with my futaba
4pin plug (goggles) -->6pin plug (futaba)
Please advice how to connect the rangelink with the futaba as well the boscam goggles.
Thanks in adv.

will I need a USB2TTL and what is it?
will I need a radio stand?
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