Servomotors used for CCTV lens control can be driven by electronic control signals.

Servomotors used for CCTV lens control can be driven by electronic control signals.

• A. Yes
• B. No
• C. Only in older systems
• D. Only for focus, not exposure

Answer: (A)

The key idea is that lens movement in CCTV cameras is guided by electronic commands. Servomotors are designed to move to a precise position when they receive a control signal, and they use built‑in feedback to confirm when they’ve reached that position. In a CCTV lens, those signals tell the motor how far to rotate the focus or zoom elements (and often the iris), and the motor continues to drive until the feedback matches the commanded position. The control signals can be analog (like PWM or voltage levels) or digital commands from a camera control unit or PTZ controller, which is why these servomotors are driven by electronic control signals. This is why the statement is true. Modern lens systems commonly motorize focus, zoom, and iris, not just focus, and this isn’t limited to older equipment.

The key idea is that lens movement in CCTV cameras is guided by electronic commands. Servomotors are designed to move to a precise position when they receive a control signal, and they use built‑in feedback to confirm when they’ve reached that position. In a CCTV lens, those signals tell the motor how far to rotate the focus or zoom elements (and often the iris), and the motor continues to drive until the feedback matches the commanded position. The control signals can be analog (like PWM or voltage levels) or digital commands from a camera control unit or PTZ controller, which is why these servomotors are driven by electronic control signals. This is why the statement is true. Modern lens systems commonly motorize focus, zoom, and iris, not just focus, and this isn’t limited to older equipment.