EN
6
Range Testing
Before each flying session and especially with a new model, it is important to
perform a range check. All Spektrum aircraft transmitters incorporate a range
testing system which, when activated, reduces the output power.
1. With the model restrained on the ground, stand 30 paces (approx. 90
feet/28 meters) away from the model.
2. Face the model with the transmitter in your normal flying position and place
your transmitter into range check mode.
3. You should have total control of the model with the button depressed at 30
paces (90 feet/28 meters).
4. If control issues exist, contact the appropriate product support department.
Receiver Power System Requirements
Inadequate power systems that are unable to provide the necessary minimum
voltage to the receiver during flight have become the number one cause of
in-flight failures. Some of the power system components that affect the ability
to properly deliver adequate power include:
• Receiver battery pack (number of cells, capacity, cell type, state of charge)
• The ESC’s capability to deliver current to the receiver in electric aircraft
• The switch harness, battery leads, servo leads, regulators etc.
The AR7700 has a minimum operational voltage of 3.5 volts; it is highly
recommended the power system be tested per the guidelines below.
Recommended Power System Test Guidelines
If the system is sharing a power supply with servos or a camera gimbal, it is
recommended that a voltmeter be used to perform the following tests.
The Hangar 9
®
Digital Servo & Rx Current Meter (HAN172), Spektrum Flight
Log (SPM9540), TM1100 or TM1000 telemetry modules are excellent tools to
perform the test below.
Plug the voltmeter into an open channel port in the receiver and with the
system on, or simply monitor the voltage on a telemetry capable transmitter,
load the control surfaces (apply pressure with your hand) while monitoring the
voltage at the receiver. The voltage should remain above 4.8 volts even when
all servos are heavily loaded.
