A small portion of the information contained in one data frame. The transmitter breaks the frame into pieces (packets), transmits them, then the receiver puts them back together into a complete frame before decoding it and sending it on to … Continue reading

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One of the navigation buttons on the face of the Taranis.  Typically accompanied by a LP or a SP instruction as in LP PAGE for long press PAGE. … Continue reading

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A selectable timer mode that makes the timer a totalizing timer.  If Persistent is checked in Timer Set Up, the last timer value before shutdown, or before changing the selected model is stored in memory.  That value is restored when the … Continue reading

Pitch Pump

An RC helicopter move where collective is rapidly changed between full positive and full negative.  Used to test the reaction of the tail and the drive system when the helicopter is under load.


Reported in Watts, equal to d.c. volts x amps. Distinguished from work = watts x time.

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Pulse Position Modulation, as distinguished from Pulse Width Modulation (PWM). A communication protocol for controlling devices by a radio signal. Was the norm in early RC radio systems due to simple electronics allowing light weight receivers. Is used in more … Continue reading

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PPM Center

Servo’s Neutral or Center position set by servo manufacturer, expressed as a Pulse Position Modulation (PPM) signal or Pulse Width Modulation (PWM) signal, rate measured in units of microseconds. … Continue reading

PPM Frame

When RF module is PPM, allows setting the frame size, pulse lengths, and polarity to match the settings of the transmitting and receiving devices.


The scheme used by the transmitter to encode its signal. The protocol is proprietary and is what determines whether or not your radio is a Futaba, a JR, an Airtronics, a FrSky, or a Joe Blow Special. If your transmitter … Continue reading

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Pulse Width Modulation is a common communication protocol used in radio control of servos. A centered condition of the servo occurs with a pulse signal duration of 1500 microseconds with 1000 microseconds signaling full servo movement in one direction and … Continue reading

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A communication protocol used by FrSky for its own XJT modules. Sends 8 channels in 9 milliseconds. If a second 8 channels are used, the total latency becomes 16 milliseconds for a given channel.

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