Spektrum SPMAR9310 - Manual (Page 7)

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helper watches the Flight Log noting any correlation between the aircraft’s
orientation and frame losses. Do this for one minute. The timer on the
transmitter can be used here.
7. After one minute release the range test button and read the data from the
Flight Log. A successful installation will yield the following:
0 - holds, less than 20 Frame Losses
It’s common to see high values on individual receivers as the carbon
structure can block the signal in various orientations. What is important is
that at least two receivers are receiving well at all times. If more than 20
frame losses or any holds occur redo the test noting the aircraft orientation
when the fades and holds occur. This will allow you to change and
optimize the antenna position(s) to a better location
Step 10. Short Test Flight Verification with Flight Log
When the system tests successfully as directed above, it’s time for a short
near test flight. This first flight should be close (less than 500 ft and about five
minutes). After the flight, land your aircraft nearby (less than 60 ft away)* and
check the Flight Log data. Again a successful flight will result in 0 holds and
less than 20 Frame losses. Extend the flight distance and times checking the
Flight Log data after every flight until you are confident with the results. Many
pilots choose to mount the Flight Log in the airplane making data checking
convenient.
*If the sailplane is landed more than 60 feet from the transmitter the system
may experience higher than normal frame losses and holds. This is because
the antennas are within inches of the ground and the signal can be blocked by
the ground causing RF link degradation. Note that when landing more than 60
feet from yourself, high flight log values are normal.
Important: Y-Harnesses and Servo Extensions
Do not use amplified Y-harnesses and servo extensions with Spektrum
equipment. Only use standard non-amplified Y-harnesses and servo
extensions. When converting existing models to Spektrum, replace all amplified
Y-harnesses and/or servo extensions with conventional non-amplified versions.
Preset Failsafe
The AR9310 features Preset failsafe only. Preset Failsafe is ideal for sailplanes,
allowing the aircraft to automatically dethermalize if signal is lost. With Preset
Failsafe, when signal is lost all channels go to their preset failsafe positions
(normally mid flap) preventing a flyaway.
• Prevents flyaways should the signal be lost
• Eliminates the possibility of over-driving servos
Receiver Power Only
• When the receiver only is turned on (no transmitter signal is present),
all channels have no output signal, to avoid overdriving the servos and
linkages.
ATTENTION: Some analog servos may drift slightly during power-up even
though no signal is present. This is normal.
After Connection
• When the transmitter is turned on and after the receiver connects to
the transmitter, normal control of all channels occurs.
• After the system makes a connection, if loss of signal occurs Preset
Failsafe drives all servos to their preset failsafe positions set during
binding.
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 switch harness, battery leads, servo leads, regulators etc.
The AR9310 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 that may
not support high-current draw, etc.), it is recommended that a voltmeter be
used to perform the following tests.
The Spektrum Flight Log (SPM9540) is the perfect tool to perform the test
below.
Plug the Flight Log 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.
CAUTON: Nickel-Metal Hydride batteries when charged with peak
detection fast chargers have tendencies to false peak (not fully charge)
repeatedly. These include all brands of NiMH batteries. If using NiMH packs, be
especially cautious when charging, making absolutely sure that the battery is
fully charged. Use a charger that displays total charge capacity. Note the
number of mAh put into a discharged pack to verify it has been charged to full
capacity.
QuickConnect™ With Brownout Detection
(Brownout Detection not available with DSMX)
The AR9310 features QuickConnect with Brownout Detection (Brownout
Detection not available with DSMX). Should a power interruption occur
(brownout), the system reconnects immediately when power is restored and
the LEDs on each connected receiver flash, indicating a brownout (power
interruption) has occurred (DSM2 only). Brownouts can be caused by an
inadequate power supply (weak battery or regulator), a loose connector, a
bad switch, an inadequate BEC when using an electronic speed controller,
etc. Brownouts occur when the receiver voltage drops below 3.2 volts, as the
servos and receiver require a minimum of 3.2 volts to operate.