5-15.7. 驱动放大器
驱动放大器的目的是给每个驱动电动机提供适当极性的电流。放大器接收来自继电器板的数字式命令，判读命令，提供使驱动电动机以适当的方向运转所必须的驱动电流信号。
放大器顶上有一个指示灯。当驱动放大器未启动时，指示灯为红色，制动电路有效，电动机停转。当操作人员按压驾驶杆上的制动按钮时，指示灯亮，表示制动器释放，电动机自由运动，或正在接收来自放大器的电流。
5-15.8. 悬臂放大器
悬臂放大器电路控制与悬臂、移动与俯仰、摄像机聚焦、光圈与拉远推近，以及摄像机延伸器有关的所有运动。放大器接收来自继电器板的信号，判读这些信号，向各个电动机提供合适的电压和电流。除了开关盒上所给的对悬臂和移动、俯仰的正常控制之外，悬臂放大器还读出速度控制器的位置。借助于转动这个旋钮，操作人员可以使悬臂放大器控制的所有功能的变化速度加快或放慢。这个旋钮不仅影响悬臂和移动、俯仰速度，而且影响摄像机拉远推近、光圈和聚焦的速度。另外，当旋钮调下来时（慢），悬臂的夹紧能力和提升能力降低。走得越慢，悬臂力量和夹紧力越小。
华译网上海翻译公司曾经翻译过大量有关驱动放大器和悬臂放大器资料文件，Beijing Chinese Subtitling Translation Service Agency has translated many technical documents about Drive Amplifiers and Arm Amplifier.
5-15.7. Drive Amplifiers. The purpose of the drive amplifiers is to provide the electrical current in proper polarity to each drive motor. The amplifier receives a digital command from the relay board, interprets that command and provides the necessary drive current signal in the proper direction to make the drive motor turn.
On top of the amplifier is an LED light. When the drive amplifier is not activated, the LED is red and the brake circuit is actively holding the motor stopped. When the operator pushes the brake button on top of the drive joystick, the LED illuminates to indicate that the brake is released and that the motor is free to move or is receiving current from the amplifier.
5-15.8. Arm Amplifier. The arm amplifier circuit controls all the movements associated with the arm, the pan and tilt and the focus, iris, and zoom of the camera, and camera extenders. The amplifier receives signals from the relay board, interprets those signals and provides the proper voltage and current signals to each motor. Additional to the normal controls given on the switch box for the arm and pan and tilt functions, the arm amplifier can read the position of the speed control. By moving this knob, the operator can speed up or slow down the movements of all of the functions that the arm amplifier controls. This knob affects not only the arm and pan and tilt speed, but also the speed of the camera zoom, iris and focus. Additionally, when the knob is turned down (slow), the ability of the arm to grip and lift is lessened. The more slowly you go, the less strength the arm and grip have.
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