AMX AXB-PT15 POSITRACK CAMERA CONTROLLER Instruction Manual download pdf (Page 8)

Introduction

AXB-PT10/15/30 PosiTrack Camera Controllers

 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. The lens must have POT outputs when recalling a preset in this mode,. The

outputs pass to the PosiTrack unit, and when the received voltage level matches the level

stored in the preset, the voltage returns to zero. Servomotor speed mode lenses not

having POT outputs do not have preset recall capability.

Motor Mode

Motor mode is used when the lens requires the motors be directly driven from an external source.

The standard voltage ranges are ± 6 VDC or ± 12 VDC with a center (no motion) of 0 VDC. Unlike

servomotor lenses, these only operate in speed mode.

The lens moves in relation to the voltage offset from zero. The farther the voltage moves away from

the center point, the faster the lens motor moves. The lens must have POT outputs when recalling a

preset in this mode, these outputs are then passed to the PosiTrack unit. When the received voltage

level matches the level stored in the preset, the voltage returns to zero. Motor mode lenses not

having POT outputs do not have preset recall capability.

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’ range of motion.

Zoom, Focus, and Iris Control

Each PosiTrack unit delivers a low voltage pulse-width-modulated output for zoom, focus, and iris

functions for motor mode lenses. These units are also capable of receiving reference voltage rails

and sending zoom, focus, and iris control signals in response to these rails. In this setting (slide-

switch configured), no active control signals will reach the lens before power (+ 12 VDC and

GND) is supplied to the lens. This motor mode applies to the control of the Fujinon and Canon

teleconferencing lenses. During preset recall operation, these outputs are synchronized with the pan

and tilt motions. Refer to the PosiTrack Unit Lens Compatibility table on page 1. Four solid state

relays are also provided to control the zoom, focus, and iris speed/position mode selection and iris

local/auto selection on the Fujinon MD series and Canon KTSA series lenses.

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AMX AXB-PT15 POSITRACK CAMERA CONTROLLER Instruction Manual Page 8