4
10X MANUAL Heli
• The NER 950S receiver is a high performance PCM single
conversion receiver with 10 KHz super narrow band ABC+W
circuitry, offering an unparalleled RF link.
• The latest “S” type Central Processing Unit (CPU) is used
in the PCM receiver. It has the highest degree of resistance to
electro-mechanical “noise.”
• A narrow band ceramic filter for high signal selectivity also
assists in rejecting cross modulation from other common radio
frequency difficulties, such as R/C transmitters or local paging
systems.
• The receiver features Direct Servo Control (DSC) for con-
trol of surfaces without radio frequency output.
• The Central Processing Unit (CPU) improves signal recep-
tion and integrated fail-safe feature.
• The new NER-950S offers the highest resolution available
in any receiver.
• The receiver has low current consumption.
• The receiver features 3-point gold plated connectors for
increased conductivity.
DS8231 Digital
• The DS8231 features wide spaced dual ball bearings
designed to endure the high vibration environments com-
monly associated with many radio control models.
• A high frequency digital amplifier offers up to 5 times
greater holding torque than a conventional servo
• Super-tight deadband of .06
µs
for superior accuracy
• Up to 5 times more holding torque than a conventional
servo with less than a 10% increase in current drain
• High output F.E.T. transistor driven motor
• High resolution of 5,900 steps per 120°
• 13 bit A/D converter
To obtain the highest performance levels from your tail rotor/
gyro system, great care and consideration must be taken in the
selection of the servo to be used.
In general, the quicker the transit time and the more accurate the
centering abilities of the servo, the better the gyro will perform.
If a servo with a slow transit time is used (more than .24 sec/60º),
in actuality the gyro system, especially a Piezo unit, may become
too quick for the servo, resulting in a “wag” or “hunting” situa-
tion which would require the user to reduce the percentage of
gain to compensate for this deficiency. This reduction in gain
would also reduce the holding power and, therefore, the perfor-
mance of your gyro system.
The following optional JR servos are recommended specifically
for use on the tail rotor:
The following gyro systems are highly recommended for use
with the
PCM
10X system. Each of these gyros is designed to
make full use of the Code 44 gyro sensitivity adjustment feature
of this system.
JR NEJ-450 Piezo Gyro
(Intermediate/Advanced)
Features
• Integrated design for easy installation/connection
• No moving parts for a nearly unlimited service life
• Linear dynamic range up to 720 degrees per second
• 10 times faster response time than mechanical gyros
• Remote proportional gain control adjustable from the transmitter
• Patented offset drift canceler
Specifications
Operating Voltage: 4.8V
Operating Current: 40 mA
Dimensions/Weight: 1.45"x1.10"x1.42"/1
1
/4 oz.
Gyro Sensor: 40x42x36mm/56g
Remote Gain Controller: 30x22x9mm/8g
Dynamic Range: 0–720° per second
JR’s latest Piezo gyro, the NEJ-450, utilizes a new state-of-the-
art integrated design for easy installation, while retaining the
same performance levels found in the previous JR NEJ-900
Piezo gyro.
Standard Transit Super Transit
Servo Time Servo Time
JRPS4735 .15 sec/60º JRPS2700G .09 sec/60
Digital Servo
JRPS8417 .10 sec/60°
1.2
Receiver
1.3
Servos
1.4
Optional High Performance
Tail Rotor Servos
1.5
Optional Gyro Selection
