It can be used to energise the plunger cylinder if the control voltage of the servo circuit has failed.
可以在没有伺服回路的控制电压时激活活塞杆。
英语百科
CV/Gate
CV/Gate (an abbreviation of Control Voltage/Gate) is an analog method of controlling synthesizers, drum machines and other similar equipment with external sequencers. The Control Voltage typically controls pitch and the Gate signal controls note on/off.