Dx2 with digital spectrum modulation, Binding, Dx2 with digital spectrum modulation binding – Spektrum SPM2020 DX2 User Manual

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The DSM system operates in the 2.4GHz band (that’s 2400MHz). This high frequency offers

a signiﬁcant advantage as it’s well out of the range of model-generated radio interference

(like motor and ESC noise). All the complex issues that now exist using 27 and 75MHz

radios with model-generated interfering noise are eliminated with this system. The DSM

system uses Direct Sequencing Spread Spectrum modulation to generate a wide signal on a

single frequency. The FCC requires that these systems be “smart”– incorporating collision

avoidance such that when a system is turned on, it scans the 2.4GHz band and selects a

channel that is not being used, then begins transmitting on that unused channel. 79 channels

are available and the odds of one DSS spread spectrum system interfering with another are

astronomically remote. The 2.4GHz spectrum has a capacity of 79 channels. In the unlikely

event that the spectrum is full, the 80th system will not connect or cause any interference

going into hold scan until a channel is free.

DX2 with

Digital

Spectrum

Modulation

During the ﬁrst installation, the receiver(s) must be bound to the transmitter. Binding is

necessary to program the receiver(s) to distinguish its corresponding transmitter from

others. Also fail-safe positions are transferred from the transmitter to the receiver during

binding. See binding below for more details.

It is necessary to bind the receiver to the transmitter during the ﬁrst installation, and is

recommended when the receiver is moved from one vehicle to another. Receivers can be

re-bound to the same transmitter or to other transmitters an inﬁnite number of times. Also

multiple receivers can be bound to a single transmitter, common when using one transmitter

to operate several models.

Only bound receivers and transmitters can connect. During power-up, the transmitter scans

for a free channel while the receiver scans for its bound transmitter. During the scanning

process LEDs on both transmitter and receiver ﬂash rapidly. When control is achieved the

LED remains on continuously.

In the unlikely event that the link is lost during use, the receiver will drive the servos to

their fail-safe positions that were preset during the binding process. If the receiver is turned

on prior to turning on the transmitter, the receiver will enter the fail-safe mode, driving the

servos to their preset fail-safe position. When the transmitter is turned on, normal control is

resumed.

To bind the receiver to the transmitter

1. Make sure the transmitter and receiver are turned off

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2. With the receiver off, press and hold the bind button on the receiver while turning on

the receiver.

3. Release the bind button when the LED ﬂashes green.

Binding

Bind Button

LED