Specifications

Chapter 2 Getting Started 17

An incorrect setting may cause the shutter to malfunction or be damaged. Cameras

having a 35 mm shutter, such as an NTE having the 1340 × 1300 CCD, must be used

with an ST-133 or ST-133A having the 70 V shutter option installed (indicated on the

back panel as shown in Figure 3). An ST-133 or ST-133A having this option cannot be

used with a camera having the small (standard) shutter, even by selecting a lower

number, because the shutter could be permanently damaged by the high drive voltage and

larger stored energy required to drive the 70 V shutter.

Power Input Module: This assembly, located at the lower right of the controller back

panel, has three functions:

• Connecting the AC power;

• Selecting the line voltage, and

• Protective Fusing.

These functions are discussed in detail under Power Requirements on page 12.

Controller Modules: There are three controller board slots. Two are occupied by the

plug-in cards that provide various controller functions in all ST-133/ST-133As.

The Programmable Timing Generator, if present, is installed in the third

slot. Otherwise the third slot is covered by a blank panel. The left-most plug-in

card is the Analog Control module. Adjacent to it is the Interface Control

module. The modules align with top and bottom tracks and mate with a passive

backplane. For proper operation, the location of the modules should not be

changed. Each board is secured by two screws that additionally serve to ground

each module’s front panel. A detailed discussion of how to remove and insert

modules is provided in Appendix F, which begins on page 81.

To minimize the risk of equipment damage, a module should never be removed or

installed when the system is powered.

If you should remove a module, take care not to overtighten the screws when you

reinstall it. They should be tightened with a screwdriver to where they are snug and no

further. Excessive tightening could damage the internal brackets.

Analog/Control Module: This module, which should always be located in the left-

most slot, provides the following functions:

• Pixel A/D conversion,

• CCD scan control,

• Timing and synchronization of readouts,

• Video output control, and

• Temperature control.

In addition to the 25-pin connector provided for the camera cable, there are four

BNC connectors and an LED, as discussed in the following paragraphs.

WARNING