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ToolkitRC ST8 Advanced Multi-Servo Tester

ToolkitRC ST8 Advanced Multi-Servo Tester


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PDF icon Manual1.34 MB

The ToolkitRC ST8 Advanced Multi-Servo Tester boasts a wide array of features usually reserved to professional test equipment.

The unit can be used to run 4 servos independently or control 8 servos from a single input. Servos can be controlled using pre-set control modes or precisely via a scroll wheel. They can also be driven from an external input signal, with support for PWM, PPM, or S.Bus signals.  

There are various measurement modes available, which allow you to test things like the response speed of servos and current draw. The latter is useful as you can then be sure your UBEC is sufficient to supply the required amp load, or it could allow you to fault find; say for example detecting a high current load caused by a stuck control surface. Best still this information is clearly visualised on the LCD display.

Input power to the ST8 can be 7-28V and connected via the XT60 socket. The unit powers the servos and the output voltage can be adjusted from 5V to 28V to suit standard and high voltage servos.


  • Data analyzer device 8-channel signal output, current measurement, curve display, and other functions.
  • 4 channels of programmable independent signal, 8 channels of signal output, the accuracy of 1 ms.
  • Current acquisition on 4 channels with accompanying curved data display.
  • Multiple measurement modes (speed, count, step, linear).
  • Output PWM signals with a period of 33 to 1000 Hz.
  • A variety of signal trigger sources (internal, buttons, knobs, external sources).
  • The external input signal supports PWM/ PPM/ SBUS with an accuracy of 1 ms.
  • Drive the servo with a maximum load of 100W.
  • USB firmware update, easy to operate.


  • S1-S4, S4 EXT signal interface support MAX 2A current, please connect to main interface when the current of your servo is higher than 2A.
  • S1-S4 signal interface support MAX 8.4 voltage, please connect to main interface when the voltage of your servo is higher than 2A.

  • Input voltage: 7-28V @ MAX 10A
  • Main output port: 5.0V-28.0V@MAX 10A
  • Signal port: 5.0V-8.4V@MAX 4A / S1-S4
  • Output voltage: 5.0V-8.4V@MAX 4A / S4 Ext.
  • Output signal:
    • 100us-2900us @ 33-1000Hz @ S1-S4
    • PWM 500us-2500us @ S5
    • PPM 8CH @ S5 SBUS 16CH @ S5
  • P1 rotation range: 1000us-2000us @ P1
  • MicroUSB: Upgrade @ USB3.0
  • LCD: 2.4 inch TFT RGB 320x240 resolution
  • Product size: 99mmx68mmx26mm
  • Weight: 140grams


  • 1 x ToolkitRC ST8 Advanced Multi-Servo Tester
  • 1 x USB Wire
  • 1 x Manual

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