Spektrum SPMAR600 - Manual (Page 8)

EN
Frequently Asked Questions on Spektrum 2.4GHz
1. Q: After I’ve bound the receiver to my transmitter, which do I turn on first when I
want to fly?
A: Either one. Every DSM 2.4GHz transmitter has a GUID (Globally Unique Identifier) code
imbedded in its signal. When you bind a DSM receiver to your transmitter, this GUID code
is stored in the receiver. If you turn the receiver on before the transmitter, you don’t have
to worry about it responding to another transmitter. The receiver will go into failsafe mode
while it waits for a signal from the transmitter with the same GUID code it has stored. See
the Receiver Power Only section for more information.
If a DSM transmitter is turned on first you can expect it to connect within 6 seconds of
powering on the receiver.
2. Q: Sometimes the system takes longer to connect or doesn’t connect at all.
Why?
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 material, 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, with an inadequate power supply can
allow voltage to momentarily drop below 3.5V. This will cause the receiver to “brown
out” and reconnect. See the QuickConnect with Brownout Detection section for more
information.
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.
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.