Spektrum SPMAR9010 - Manual (Page 11)

EN
11
specific aircraft. This Advanced Range Check allows the RF performance
of each receiver to be evaluated and to optimize the locations of the
remote receiver.
Advanced Range Test
1. Plug a Flight Log (SPM9540 - optional) into the data port in the AR9010
and turn on the system (Tx and Rx).
2. Advance the Flight Log until F- frame losses are displayed by pressing
the button on the Flight Log.
3. Have a helper hold your aircraft while observseving the Flight Log data.
4. Standing 30 paces away from the model, face the model with the
transmitter in your normal flying position and put your transmitter into
range test mode. This causes reduced power output from the transmitter.
5. Have your helper position the model in various orientations (nose up,
nose down, nose toward the Tx, nose away from the Tx, etc.) while your
helper watches the Flight Log noting any correlation between the aircraft’s
orientation and frame losses. Do this for 1 minute. The timer on the
transmitter can be used here.
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 AR9010 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 a questionable power system is being used (e.g. small or old battery,
ESC that may not have a BEC that will support high-current draw, etc.),
it is recommended that a voltmeter be used to perform the following tests.
Note: The Hangar 9 Digital Servo & Rx Current Meter (HAN172)
or the Spektrum Flight Log (SPM9540) is the perfect tool to perform
the test below.
Plug the voltmeter into an open channel port in the receiver and with the
system on, 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.
CAUTION: The latest generations of Nickel-Metal Hydride batteries
incorporate a new chemistry mandated to be more environmentally friendly.
These batteries when charged with peak detection fast chargers have
tendencies to false peak (not fully charge) repeatedly. These include all