User`s manual

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500 ms. You cannot change this setting, it is automatically populated when you change the
Descent Sample rate.
D Main Enable (0-Off, 1-IGN, 2-Servo CCW, 3-Servo CW)
E Main Altitude <100-2000 by 100, 0 @ Apogee>
F Main On-Time <1-9, 0-Cont.> {only if Main Enable =1}
F Servo PWM <0-9> {only if Main Enable = 2 or 3}
This setting controls the Main (Channel A) deployment channel. When set to “0”, the channel is
turned off, so the other settings don’t matter. When set to 1-3, the deployment channel turns on
at the altitude selected by the “Main Altitude” setting, from 100 to 2000 feet or nose-over if “0”
is selected. The altitude and elapsed time of Main deployment are recorded in the Flight
Summary memory for downloading. Zeroes in these fields means that the Main channel wasn’t
enabled and therefore didn’t fire.
If this setting is 2 or 3, the deployment channel sends out a pulse-width modulated stream that
can control standard analog hobby servos. The amount of servo rotation is controlled by the
Servo PWM value, each tick changes the servo pulse width (nominally 1.5 ms at center) by 100
microseconds in each direction, so the total possible range of servo pulse width is .5 to 2.5 ms.
The servo pulses are sent for 3 seconds after deployment, this value is not configurable but is
more than adequate for even the slowest servos.
The effect of the settings are:
Main Enable Main On Time
0 n/a Deployment Channel OFF
1 1-9 secs Deployment channel activated at Main Altitude
for Main-ON seconds
1 0 Deployment channel activated at Main Altitude
and held on continuously until Reset
Main Enable Servo PWM
2 0-9 Deployment channel activated at Main Altitude
in servo mode, counter-clockwise, amount of
rotation controlled by Servo PWM setting
3 0-9 Deployment channel activated at Main Altitude
in servo mode, clockwise, amount of
rotation controlled by Servo PWM setting
Note that the AUX2 channel will “shadow” CHA if you set CHA to the igniter (“1”) setting, so if
you want to provide redundancy in your deployment channel you can use AUX2 with a suitable
buffer circuit to accomplish this. AUX2 is pre-programmed to fire for two seconds.