Servomotor Lenses; Pan And Tilt Control; Zoom, Focus, And Iris Control; Sample Product Application - AMX PTE-300 Operation/Reference Manual

Servomotor Lenses

This method is generally used in broadcast or videoconference-style lenses. The voltage range used for
servomotor style lenses is +2.5 to +7.5 VDC. These lenses can be controlled in two different modes:
positional mode and speed mode.

Pan and Tilt Control

Presets and travel limit stops are based on encoder counts from a home position index, located at the
center of each axis's range of motion.

Zoom, Focus, and Iris Control

The PTE-300 utilizes the reference voltage limits from the lens (typically 2.5v to 7.5v) and drives the
zoom, focus, and iris axes within this range.

Sample Product Application

FIG. 2 shows a sample camera control application using the PTE-300.
FIG. 2 Sample PTE-300 camera product applications
PTE-300 PosiTrack Ethernet Camera Controller
Positional mode is the most common servomotor mode. When voltage changes, the lens
moves and remains still until the voltage changes again. For example, if a lens receives a
voltage of +3 VDC, the lens moves to the corresponding position and stays there as long as the
voltage remains at +3 VDC. The movement speed of the lens motor is a function of the
PTE-300's analog output. The lens servomotor receives the preset voltage when a preset is
recalled in the positional mode.
Speed mode moves the lens when the voltage deviates from the center point of its range. The
farther the voltage moves away from the center point of reference, the faster the lens motor
moves. When the voltage returns to the center point, the lens stops wherever it is.
Application #1 - Ethernet
PTE-300
24-volt
Power Supply
PWR
Network Switch
Ethernet
PTE-300 Pan/Tilt Ethernet Camera Control Head
AMX AXP-PLV
AXLink
PWR
12 VDC
Power Supply
3