Desford Flyers
Buddy Lead
There is occasionally some confusion about the data that is sent between transmitters when they are connected together with a "Buddy Lead".
The "Slave" or "Student" transmitter sends an old fashioned PPM (Pulse Position Modulation) stream of data to the "Master" or "Tutor" transmitter.
The photograph shows the data stream from my Futaba transmitter. Each pulse corresponds to a control channel. There are eight positive pulses varying from 1.0 to 2.0 milliseconds according to the specific control stick positions. In the example shown most of the pulses are 1.5 mSecs since their respective control sticks are in the mid positions. Channel 3 is designated "Throttle" with the Futaba brand and it's pulse is showing 2.0 mSecs due to the throttle stick being at minimum position. Channel 5 is showing 1.0 mSecs in this example, being linked to gyro gain in a helicopter application.
The stream of 8 pulses is followed by a long reset pulse of approximately 15mSec.
The "Slave" or "Student" transmitter sends an old fashioned PPM (Pulse Position Modulation) stream of data to the "Master" or "Tutor" transmitter.
The photograph shows the data stream from my Futaba transmitter. Each pulse corresponds to a control channel. There are eight positive pulses varying from 1.0 to 2.0 milliseconds according to the specific control stick positions. In the example shown most of the pulses are 1.5 mSecs since their respective control sticks are in the mid positions. Channel 3 is designated "Throttle" with the Futaba brand and it's pulse is showing 2.0 mSecs due to the throttle stick being at minimum position. Channel 5 is showing 1.0 mSecs in this example, being linked to gyro gain in a helicopter application.
The stream of 8 pulses is followed by a long reset pulse of approximately 15mSec.
