Controller, pictured above, is the electronic heart of the 1420 DASH
System. It contains a micro-processor based dedicated controller,
firmware, RAM memory, analog and digital sections, power amplifiers, and
video and data communications capability. Optionally, the controller
may contain a Front Panel monitor or display that reflects the controller
video output from the system.
When the Controller is turned on, it will perform a self-test and download the Camera and Transport calibration
information for use in system operation.
Typically, a Controlling Computer
will be used to send commands to the Controller through the
RS232 or an
IEEE488 bus. The test results from the command are passed back to the
controlling computer to be stored or processed in accordance with user
developed test procedures.
Manual testing can be accomplished with the 1420 DASH Main Menu
Software by connecting a dumb terminal (DT) or a personal
computer (PC) to the RS232 port. When the system is
initially powered by or reset, the Main Menu will be displayed
on the DT or PC. Although it is not necessary for
operations, the operator will find it convenient to attach a
Video Monitor and/or a Video Recorder to the
RS170 connection on the
Controller Back Panel if extensive manual testing is to be done.
Controller Interface (Back Panel)
1420 DASH Controller - Back Panel
Interface Connectors on 1420 DASH Controller
The Controller includes several interfaces that are not
required for automatic testing, but in some cases may make
testing easier and allow manual interactive testing. These
or IEEE488 Interface (J1 on back panel)
This enables the controlling computer to communicate with
the SE1420 DASH
using Spectron Control Language Commands (Manual, SE1420 DASH Spectron
Control Language Commands).
Serial Interface (J4 on back panel)
This interface allows two-way serial communication between the
and a dumb terminal or other RS232 device. This serial interface is also
factory calibration and checkout.
CRT Output (J3 on back panel)
This connection is a video output used to display test results
and command menus
on an external monitor.
Sync Input (J2 on back panel)
This interface allows the operator to toggle between external
and internal sync.
This sync input can be synchronized with a vertical sync pulse from the
system that is undergoing test. Using this external sync function should
improve the performance and consistency of analysis functions of external
displays. The system can function without an external sync, but the system
will not work at all if there is no external sync present and the system is
in the external sync mode.
100 Pin J5 Connection - 1420
DASH Controller 100 Pin Connector - DASH Cable
The 100 Pin DASH Cable connects the Controller (J5 on back
panel) to the
Transport. The 100 pin connector is a zero insertion force connection that
is keyed to allow insertion only in the proper manner. The cable is
symmetrical and either end may be connected to the Controller or Transport.
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