Spektrum RC Radio Technology
While in development, Spektrum engineers sought to create a radio system that provided the end user with the same locked-in feel as a crystal-based radio while eliminating interference and glitching. Spektrum engineers sought to improve both the modeling experience and safety all at the same time. Just a few years ago, the thought of eliminating crystals and frequency control was not even on the horizon. Now, thanks to Spektrum Technology, this is not only a possibility, its a reality.
2.4ghz - Well Above The Interference
What makes Spektrum Technology superior to currently used systems is a combination of two factors:
1. The utilization of frequencies in the higher 2.4ghz Industrial, Scientific, and Medical (ISM) radio band.
2. Spektrum's patented Direct Sequence DSM (Digital Spectrum Modulation) technology.
Using a frequency in the 2.4ghz range places the broadcast signal beyond the range of pesky model-generated noise from motors, speed controls, ignitions, and metal-to-metal noise (which typically occurs under 300mhz).
This is the first step in eliminating glitching and interference. From here, unlike current narrow band 27 and 75mhz systems and even other 2.4ghz frequency hopping systems, Spektrum's Direct Sequence Spread Spectrum (or DSSS) utilizes pseudo random spreading codes to spread the data over a wide range of the spectrum, eliminating the interference issue associated with narrow band systems.
Global Unique Identifier (GUID)
One of the most important features of Spektrum's DSM technology is the Global Unique Identifier (GUID). The GUID is a unique 32-bit code with over 4.2 billion potential combination's, meaning its virtually impossible for two radios to have the same GUID. This transmitter-based code is stored in the receiver during the binding process. Once a receiver is bound to a transmitter, it will only listen to the data sent from that specific radio or module system until its re-bound to another transmitter.
Each time a Spektrum receiver is turned on after it is bound, it searches for the specific GUID from the transmitter. If the GUID is not found, the receiver will simply continue to scan until it connects to the correct transmitter. This is one level of protection that helps the receiver differentiate between, and eliminate, stray RF signals so you no longer have to worry about getting interference.
DSM2 Technology
Above and beyond the basic features of DSM, there has been a technological breakthrough for both air and surface applications thanks to Spektrum. An updated version of DSM technology referred to as DSM2 (second generation protocol) makes it possible to fly any size model with the convenience, safety, and peace of mind of Spektrum. With DSM2, the total latency of your radio system has been greatly reduced, while the bit-rate has been increased. When combined, these improvements provide hobbyists with a faster and more locked-in feeling when compared to traditional 27MHz, 72MHz, or 75MHz radio systems. DSM2 also provided a new opportunity when separating the two receivers. By providing superior path diversity, the DSM2 receiver can now see a broader RF environment.
