Spektrum SPMR4400 DX4e - Manual (Page 16)

16
EN
A: In order for a DSM system to connect, the receiver must receive a large
number of uninterrupted signal packets from the transmitter. This process
takes just a few seconds, but if the transmitter is too close to the receiver
(within 4 feet) or near reflective material (metal objects, carbon fiber
materials, tuned pipes, etc.) it may detect its own reflected 2.4GHz energy as
“noise”. This can delay or prevent connection.
If this happens make sure you are a sufficient distance from metal objects
and the receiver itself before you power up and try again.
3. Q: Is it true that DSM systems are less tolerant of low voltage?
A: All DSM receivers require at least 3.5V to operate normally. Most servos
cease to operate below 3.8V. Using multiple high-voltage servos, however,
with an inadequate power supply can allow voltage to momentarily drop
below 3.5V. This will cause the receiver to “brown out” and reconnect.
All recently manufactured JR and Spektrum DSM receivers feature
QuickConnect technology that will reconnect the system within a quarter of
a second after battery power recovery should a brownout occur. For more
information about Brownout Alert and QuickConnect, please refer to the
instruction manual for your receiver.
4. Q: Sometimes when I power on my DSM system I notice the receiver won’t
connect and it needs to be rebound to the transmitter. Can this happen in
flight?
A: No. A DSM receiver cannot be unbound from its transmitter without
specific action by the user. You can accidentally unbind a receiver by
inadvertently placing the transmitter into bind mode. If this happens and the
transmitter doesn’t detect a binding signal from the receiver it can cause the
receiver to be unbound.
5. Q: How important is it that I test my system using a Spektrum Flight Log?
A: All 2.4GHz signals, not just DSM, are affected by proximity to conductive
materials such as carbon fiber or metal. Few RTF and ARF sport airplanes
or helicopters use enough of these kinds of materials for it to be an issue.
If, however, you’re flying a sophisticated model that uses a lot of conductive
materials in its construction, a Flight Log can be helpful. The information it
collects when you fly will help you determine the optimum location for your
receiver(s) so you can minimize the effects of these materials on your signal
performance. For more details on the Flight Log and how it works, visit
SpektrumRC.com.
FEDERAL AvIATION ADMINISTRATION
PURPOSE
This advisory outlines safety standards for operations of model aircraft. We
encourage voluntary compliance with these standards.
bACkGROUND
Attention has been drawn to the increase in model aircraft operation. There is a
need for added caution when operating free flight and radio controlled craft in
order to avoid creating a noise nuisance or a potential hazard to full-scale aircraft
and persons and/or property on the surface.
OPERATING STANDARDS
Modelers generally are concerned with safety and exercise good judgment
when flying model aircraft. However, in the interest of safer skies, we encourage
operators of radio controlled and free flight models to comply with the following
standards: