7CH Essential Instructions R1.0 2022/11/08
6
Note that when stabilization is activated, CH8, if available on the transmitter, is used for the Master Gain
function.
It is not accessible for other purposes.
Stabilization Direction
If stabilization is active, it is ESSENTIAL that control surfaces move in the correct directions to counteract
disturbances; reversed stabilization will probably cause a crash. Control directions in response to stick
movement are set in the transmitter, but stabilization directions are set in the receiver, as follows:
1. With receiver powered ON and without any bind plug, press and hold button C for about 3 seconds.
2. Release button C when all six LEDs flash (three red, three green).
3. Each green LED will now turn on for 3 seconds in this sequence: G1 (Ail), G2 (Ele), G3 (Rud).
4. When the LED for the surface to be reversed is reached, tap button C twice in quick succession.
5. Allow the receiver to exit from Stabilization Direction mode.
6. Repeat as required for other surfaces.
7. Test that stabilization directions are correct on all axes (see page 8).
Stabilization Always-ON (Optional)
Setting the receiver to Always-ON mode allows the Stabilization ON/OFF channel (7 or 5) to be freed up for
other purposes.
Given an eight or more-channel transmitter, even with Always-ON active Stabilization can still be turned down
to a negligible level by setting CH8 (Master Gain) to -100% (but for zero gain CH8 must be at -150%).
To set Stabilization Always-ON, proceed as follows:
1. Make sure the receiver is programmed to one of the five options listed above (page 5).
2. With Transmitter ON and receiver bound, power receiver ON and wait at least 60 seconds.
3. Press and hold Button F until the blue Setup light turns ON. Release button.
4. The green Status light should now also be ON to indicate that stabilization is active.
To cancel Always ON, repeat. Hold Button F until the blue Setup light and the green Status light turn OFF.
Step 5: Using Stabilization – if activated.
The following assumes that you are using a Generation 2 or later Spektrum transmitter and that you have
already programmed the receiver with one of the stabilization options explained above. Using the receiver with
other transmitters is discussed in a separate pending document, “Additional Information”. [LINK to be provided]
It is usually most convenient to complete receiver programming (see Step 4, above) and items 1 to 3 below
before mounting the receiver in the plane.
1. Set up the transmitter
Set up a new model definition in the transmitter or reset an existing model. In particular, disable any delta wing
(elevon) or V-tail mixing in the transmitter – if these mixes are required when stabilization is active, they must
be done in the receiver. Make sure servo Travel (end points/limits) is set to 100%.
Set up a switch on channel 7 (or optionally on channel 5) to control Stabilization ON/OFF.
Set up channel 8 (if available on your transmitter) to be controlled by a knob or slider for Master Gain.
Despite the receiver only having 7 outputs.
Even with stabilization turned down to zero gain, Delta Wing or V-Tail mixing must NOT be done in the transmitter.