Wednesday, June 15, 2011

Announcing DMSS and the JR XG8 from JR Propo

Modelflight is very excited to announce JRs truly 'state of the art' entry into the 2.4GHz market; DMSS and the XG8!

The brand new eight-channel XG8 DMSS radio will be released in Australia on June 15th. 

The XG8 Radio will be offered as a combo, including anXG8 transmitterand a RG831B (with RA01T remote) telemetry enabled receiver. 

The XG8 is the first JR transmitter to come with a LiFe battery, being fitted with a 2S 1400mAh LiFe pack. This has greatly reduced the weight of the transmitter, which weighs in at only 770 grams. It also ensures perfect balance and no compromise to the great JR ergonomic design. The transmitter has an integrated charging circuit so just plug in the suppliedAustralian Compliant AC adapter and the charging unit will shut down automatically once it detects that the battery is fully charged. No more worries about overcharging!

The XG8 offers Aeroplane, Helicopter and Glider modes, a 30 model internal memory, stick modes 1 to 4 and an SD card slot for model data sharing, expanded storage and software updates (SD card not supplied). 

Programming is easy thanks to JR’s well-proven, intuitive user interface with data entered using the familiar scroll bar and four push-button entry keys. The programming information is clearly displayed on the large, graphical back lit screen. 

XG8 uses the new JR DMSS 2.4 technology which, besides offering a secure, robust radio link to control your models, also offers advanced telemetry functions and JR’s new Intelligent Output System. Receiver voltage telemetry is built in as standard and other forthcoming add-on sensors will give you real time feedback of information from your model such as the RPM of an aircraft propeller or helicopter rotor blades, temperature and variometer/altimeter readings. 

JR’s Intelligent Output System automatically selects control signals that need to be transmitted at exactly the same time and transmits the data for these channels as one complete signal frame. This ensures that there is no time delay when commanding servos used for critical functions such as a CCPM swash plate on a helicopter or when operating a four servo aileron wing.

Other features include side-lever controls on either side of the transmitter, a Touch Select System for switch selection, dual trim options, a user selected menu for frequently used functions, failsafe on all eight channels, user assigned switch function, programmable throttle cut and two independent programmable timers.

What is JR DMSS?
Dual Modulation Spectrum System is JR’s own 2.4GHz protocol. A later entrant into the 2.4GHz market, DMSS can be considered as the truly ‘state of the art’ method of providing radio control for model use.  And since JR have not rushed their own 2.4GHz protocol into production they have been able to incorporate the very latest techniques for ‘Wideband Data Transmission’ into the next generation of JR radio control sets.

DMSS combines the best features of Frequency Hopping Spread Spectrum (FHSS) and Direct Sequence Spread Spectrum (DSSS) protocols. FHSS is great for avoiding interference and DSSS offers high response. JR DMSS combines both these attributes, having both frequency hopping and high response.

The JR DMSS system uses a greater than 3Mhz wide signal as compared to the majority of others which utilise a much narrower [1Mhz or less] signal.

If we know anything about spread spectrum signals, a wider base signal [3Mhz Vs 1Mhz] allows for a huge increase in noise and interference immunity performance and at the same time allowing for much faster data bandwidth/throughput.

The fact that DMSS is actually using quite a wide bandwidth signal is a huge advantage in 2.4GHz performance and it will provide superior performance over any other current 2.4GHz system that is currently available.

DMSS also offers ‘Two-Way Communication’ (telemetry) with receiver voltage monitoring as standard. Other types of sensor are due soon, with Temperature and RPM sensors being the next types to become available from JR in late June.

Probably the most important thing about JR DMSS is that it is 100% pure JR, with no involvement from any other outside company. This means that JR are back in full control of product development, so they can now concentrate on doing what they do best – making what are arguably the world’s best quality  radio control systems.

Click here to read more on JR's DMSS

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