INSTRUCTOR OPERATOR STATION (IOS)

TM 9-6920-737-10

INSTRUCTOR OPERATOR STATION (IOS) - UNIT 20

The IOS resides in the Trainer Shelter. It consists of a doublewide console with a writing surface. The IOS

provides the operating station for the Instructor/Operator. It contains controls, indicators, and visual displays

for functional control of training programs, training records review and management, and maintenance

diagnostic tests of the U-COFT.

The Power Panel (1) is mounted across the upper, front of the 1OS. It provides controls and indicators for ac

power on/off status and control, dc power supply status, and total operating time.

The Commander's and Gunner's 19-Inch Color Monitors, (2) and (3) are front mounted (side-by-side) below the

Power Panel (1). The monitors display the same sight scenes being viewed by the Commander and Gunner in

the Crew Station sights. Front panel controls (4) below the display screens provide on/off, brightness, and

contrast control for the Instructor/Operator's viewing preference.

A Tape Recorder (5) mounted on the slanted portion of the writing surface is connected internally to the

intercom system. The Tape Recorder provides pre-recorded orientation narratives for crew training and

permits the Instructor/Operator to record verbal commands and communication during training sessions.

Controls on the recorder provide the standard functions of on/off control, record, playback; tape controls of fast

forward, rewind and start/stop; and volume control. A tape counter and speed control are used at the discretion

of the Instructor/Operator.

The Communication Panel (6) is mounted below the Tape Recorder (5). It provides the Instructor/Operator's

headset jack and volume controls for voice communications And aural cues. Two headsets with press-to-talk

switches and a splitter cable are provided for use at the Communication Panel. An audible alarm and

overtemperature indicators alert the Instructor/Operator if an overtemperature condition should occur in the

Crew Station, SPC or the IOS console itself. A two-position switch allows interchanging displays on the 19-inch

monitors (2) and (3).

The Display Terminal consists of an alpha-numeric display screen (7) mounted to the right of the Tape

Recorder (5) and a keyboard/keypad (8) which rests on the con- sole writing surface. The Display Terminal is

an input/output device for the GPC (see1-10). It provides the Instructor/Operator with the means of

communicating with the GPC to control training selections and record reviews. Data is entered on the

keyboard/ keypad (8) and alphanumeric responses are viewed on the display screen (7).

The ISU/CR/ASU 3-CRT Power Supply is located behind latched door (9). The power supply provides dc

power to the sight scene display devices in the Crew Station. The power supply is turned on when power is

applied at Power Panel (1).

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