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140     Bu il d  Y o ur  O w n  Q u a d c o p t e r

































                             Figure 6.10  Actual experimental setup.




                             the  r/min  telemetry  sensor.  Figure  6.11  is  a  photo  of  one  of  these  test-point  extensions.
                             Notice that I used EC3 connectors throughout, which standardizes all the connection points.
                                The initial test simply generates the receiver waveform for a zero throttle position.
                             Figure 6.12 shows the waveform out of the AR8000 going to the ESC with the DX-8 throttle
                             at its minimum setting. The automated measurements at the bottom of the waveform show
                             a 1.11-ms high-level pulse width with a 22-ms period, which is equivalent to sending a





















                             Figure 6.11  Test point extension cable.
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