Spektrum SPM7800 DX7S - Manual (Page 18)

18 SPEKTRUM DX7s • RADIO INSTRUCTION MANUAL
EN
Mixing
Mixing allows control input for a channel to affect more than one
channel at a time. Mixing functions support:
• Mixing a channel to another channel.
• Mixing a channel to itself.
• Designating offset or where zero movement is for the sec-
ondary channel.
• Linking primary to secondary trim.
• Assigning a mix to a switch position.
These mixes are available for each model memory: six program-
mable mixes, Cyclic to Throttle (HELI) or Elevator to Flap (ACRO)
and Aileron to Rudder (ACRO).
Select a channel for master and slave. Inputs for the mas-
ter channel control both the master and slave channels. For
example ELE > FLP makes elevator the master channel and flap
the slave channel.
Not all programmable mixes have Offset. Change offset value
to change the effective center position of the slave channel in
one direction (negative in one direction and positive in the other
direction).
Set Trim to Act to make primary channel trim adjustment change
the secondary channel trim.
A channel monitor on the left side of the screen shows how
channels respond to input. An assigned switch must be in an
activating position for a mix to show on the monitor.
You can activate ACRO mixes by an assigned switch. HELI mixes
are active in one or more assigned flight modes: N (normal),
1 (Stunt 1), H (Hold) and M (Mix). See Flight Mode and Switch
Select for assignment of flight modes to switches and switch
positions.
CAUTION: Always do a Control Test of your model after
changing mixes.
Range Test
Always do a radio system range test before each flying session,
especially when flying a new model.
All Spektrum aircraft transmitters incorporate a range testing
system which, when activated, decreases output power for a
range test.
1. With the system powered on and the model restrained, stand
30 paces (approximately 90 feet/28 meters) from the model.
2. Face the model with the transmitter in your normal flying
position and put the transmitter into range test mode.
3. Operate the controls while holding the trainer/bind button.
You should keep full control of the model at 30 paces (90
feet/28 meters).
4. If the model does not respond correctly to controls, make
sure receiver antennas, receiver, servos and power supply
are operating correctly.
5. Release the trainer/bind button to return transmitter output
to full power.
6. Doing a range test while using a telemetry module will
display the flight log data on the transmitter screen.
Advanced Range Testing
For models containing large amounts of conductive material, use
a Flight Log for an advanced range test.
The advanced range test confirms that the receivers are operat-
ing correctly in their installed positions.
The Flight Log shows RF performance of each receiver. Two
people are required for doing the advanced range testing.
1. Connect a Flight Log (SPM9540) to the main receiver’s data
port and power on the system (transmitter and receiver).
2. Press the button on the Flight Log until the F- frame losses
are displayed.
3. Stand 30 paces (approximately 90 feet/28 meters) away
from the model, then face the model with the transmitter in
your normal flying position.
4. Put your transmitter into range test mode and decrease the
transmitter’s power output.
5. Operate the transmitter controls while holding the trainer
switch. You should have full control of the model at 30 paces
(90 feet/28 meters) from the model.
6. Have a helper move the model (nose up, nose down, nose
toward the transmitter, nose away from the transmitter—
similar to how the model will fly) while using the flight log to
see the effect of aircraft’s orientation on frame losses.
7. Do this range test for one minute, using the timer on the
transmitter. A successful advanced range test shows:
H- 0 holds; F- less than 10 frame losses;
A, B, R, L- Frame losses will typically be less than 100.
Compare relative frame losses. If a receiver has significantly
higher frame loss values (two to three times more), do the test
again. If the results are the same, move the receivers in the
model until results improve.