User manual

DPSI RV Family Operating Instructions Version 2.1
page 12 of 44
4.2. APP (Advanced Push Pull Servo Pulse Amplification)
Each servo is provided with optimally prepared amplified pulses from
the receiver. Servo signals usually are weakened if servo cables are
connected in parallel (V-cable), which makes them interference prone.
The servo pulses stay fully maintained in DPSI RV systems, even if
four servos are connected on one channel. Short circuit proof ness to
the negative and positive lines is a specialty of the pulse amplification.
If a mistake happens during wiring, which short cuts the pulse wire of a
servo to negative or positive, the amplifiers are not destroyed and all
other servos even on the same channel continue their operation
problem free. An additional advantage is the current saving APP-
Technology. The amplifiers are based on Push Pull output stages,
which drive the low- as well as the high-phase of the servo pulse.
Herewith, the high switching current is not applicable like in
conventional open collector end stages, where the low phase of the
servo pulse is generated via a resistor as a “short cut current”.
Of course, the pulse amplifiers perfectly recognize and amplify
weakest signal levels of some 2.4GHz receivers!
4.3. IVM (Intelligent Voltage Monitoring)
An internal microcontroller monitors all voltages by using an intelligent
algorithm and shows various faults (overload, low voltage, voltage
faults) acoustically by means of a built-in piezo buzzer. Furthermore,
errors are displayed through blink codes of the LED in the switch
transmitter.