Specifications

22 ST-133/ST-133A Controller Manual Version 2.H
F and S Zero adjustments: These 10-turn potentiometers control the offset
values of the Fast (F) and Slow (S) A/D converters. The offset is a
voltage that is added to the signal to bring the A/D output to a non-zero
value, typically 50-100 counts. This offset value ensures that all the true
variation in the signal can really be seen and not lost below the A/D “0”
value. Since the offset is added to the signal, these counts only
minimally reduce the range of the signal to a value in the range of 50-
100 counts lower. Adjusting a potentiometer clockwise increases the
counts while rotating it counterclockwise decreases the counts. For
controllers with only one A/D converter (F), the second pot (S) will not
be activated.
Note that the offset is preadjusted for optimum system performance at
the factory and should not normally need adjusting. However, to
accommodate the widest possible range of measurement conditions,
these adjustments are made user accessible.
Do not adjust the offset values to zero, or some low-level data will be missed.
Detector connector: A cable
*
that interconnects the Controller and the Camera
connects to this 25-pin connector (type DB25). This connector, the cable, and the
corresponding connector on the camera are configured so that the cable cannot
be installed incorrectly. Note that this cable is secured by a slide-lock
mechanism at the end that connects to the controller. The other end will be
secured by screws or by a slide-lock as required by the camera. To ensure
reliable operation, it is essential that both ends of the cable connector be secured
before powering the controller.
Always turn the power off at the Controller before connecting or disconnecting a cable
that interconnects the camera and controller or serious damage to the CCD may result.
This damage is NOT covered by the manufacturer’s warranty.
Interface Control Module: This module, which should always be located in the
center slot, provides the following functions:
• TTL In/Out Programmable Interface, and
• High-speed serial communications control.
*
If using a PI-MAX camera with an ST-133A equipped with a PTG, there will be two cables
between the Controller and the Camera. The first goes from the Detector connector of the
Controller to the Power/Signal connector of the PI-MAX. The second cable goes from the
Timing Gen connector of the PTG to the Timing Gen connector of the PI-MAX.
CAUTION
WARNING