B. Hand Unit
The Hand Unit transmits Focus, Iris, and Zoom (when a Micro Force is fitted) data to the MDR2
unit. This digital data can be sent either through a cable connection using the Command cable,
or in wireless mode using the ML2 Microwave link.
Power for the Hand unit is provided through the Command cable when a cable link is used or
from the NMH battery pack when used in the wireless mode. The Hand Unit will operate over an
input voltage range of 10.5 – 30 VDC.
The Hand Control incorporates a method for quickly adjusting the scale relationship between
the movement of the iris and focus control knobs and the motor rotation. By holding the iris or
focus switches in the "set" position, the operator can make any part of the lens scale equal to
the full range of the iris or focus controls. This operation effectively expands the lens scale and
allows end limits to be set. In the same way, the zoom set switch allows the operator to pre-set
zoom limits. Pressing the switch(es) into the "reset" position instantly restores full scale
operation.
A special operating mode is provided to enable the FI+Z to be used to drive the Pan and
Horizon axes of the Revolution snorkel lens. The Normal/Snorkel switch is located just above
the Focus knob (see fig.1). When the switch is set to Snorkel mode, both lens calibration for the
iris and zoom channels and the bargraph display are disabled. The Micro Force Zoom Control
drives both the Pan and Horizon axes of the lens, keeping the horizon level. A detailed
description is given in Section (xx).
The ergonomic features of the Hand Unit include a large silicone damped focus knob, an iris
slider adjustment positioned to enable one hand operation and a bright LED bargraph to
indicate zoom position. The replaceable iris scale strip allows for the easy placement of marks.
Zoom command is provided by a Micro Force V + F2 or Digital Micro Force zoom control. Zoom
offsets can be immediately canceled by pressing the Zoom Calibration Switch. Camera
operation can be initiated from either the F I + Z hand unit or from the Micro Force control.
A remote Iris receptacle is provided at the bottom of the Hand Unit. This allows the iris to be
controlled by another operator using the Remote Iris Control (p/n 4020).
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