3
EN
DSMX
®
Spektrum launched the 2.4GHz RC revolution with its DSM2® technology.
Since then, millions of hobbyists the world over have come to embrace 2.4 as
the way to fly. Spektrum leads the way yet again with DSMX—the world’s first
wideband frequency-agile 2.4GHz signal protocol.
How Does DSMX Work?
It’s a crowded 2.4GHz world out there and every 2.4GHz system faces the
same challenges. DSMX better equips you for these challenges by combining
the superior data capacity and interference resistance of a wideband signal
(like that used in DSM2) with the agility of frequency shifts. Compared to the
wideband signal of DSMX, the narrow band signal of other frequency agile
2.4GHz transmitters is more likely to suffer data loss in the event of on-channel
interference. Think of it as a river vs. a stream. It takes more interference to
dam a river than it does a stream. As more and more 2.4GHz transmitters
compete for the same number of available channels, there is more interference
and more risk for data loss. By adding the agility of frequency shifts to the
superior interference resistance of a wideband signal, DSMX is far less likely to
suffer significant data loss from on-channel interference. The result is quicker
connection times and superior response in even the most crowded 2.4GHz
environment.
DSMX Operational Differences
DSMX transmitters and receivers function nearly identically to Spektrum DSM2
systems. Binding, setting the failsafe, recording flight log data, as well as general
use of the system is no different than using any current Spektrum system.
Following are the operational differences:
Brownout Detection is not available on DSMX Receivers. DSM2 receivers
feature Brownout Detection that flashes the LED on the receiver if a power
interruption occurs. While DSMX receivers have QuickConnect™ technology
and recover instantly from a power interruption, the architecture of DSMX
prevents Brownout Detection when operating in DSMX mode.
Flight Log Recording-Fades Higher than DSM2
Note that DSMX moves through the band while DSM2 finds two quiet channels
and remains on those channels. Consequently because DSMX operates on
quiet and noisy channels, it’s common to have more antenna Fades than when
using DSM2.. When taking flight log data readings, the Frames and Hold Data
are important and should be used as a reference while Fades are insignificant
due to the nature of frequency shifting. A 10-minute flight will typically result in
less than 50 Frame Losses and no Holds.
Just How Good is DSMX?
In multiple tests, 100 DSMX systems were operated simultaneously for
extended periods of time. During these tests each of the 100 systems was
monitored in flight and on the ground. Not a single case of RF link loss, latency
increase or control degradation was experienced or recorded.
