Spektrum SPM20200 DX2.0 User Manual download pdf (Page 5)

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.

DX2.0 with

Digital

Spectrum

Modulation

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Spektrum SPM20200 DX2.0 User Manual Page 5