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Power Supply Module
The 1865 instrument power supply module provides +5V, +24V, and -12V. It supplies
most of the power for the analog instrument board including the power source for the
high voltage supply. This module is located towards the front of the unit and the
standard I2000 power supply towards the rear.
4.2.3 I2000 Instrument Options
IEEE-488 Board & Cable
The IEEE-488 board is offered as an option to the 1865 and allows complete control over
all aspects of the instrument. Any user control available through the keyboard or any
information available for display can be accessed over this interface. This board is
mounted towards the right rear of the unit stacked above the processor board and above
or below the floppy drive controller board (order of these two is not important but
dependent on which option was installed last). Connection to the IEEE-488 connector on
the rear panel is made by an interconnecting cable.
Floppy Drive
The 3.5" floppy drive is offered as an option to the 1865, for storing multiple setup
conditions beyond what can be retained in the internal RAM of the unit and for storing
test results. The drive will handle standard 3.5" floppies, offering 1.44Mbits of memory
in DOS compatible file format, thus the setup conditions and results are readable on an
IBM-PC or equivalent.
Floppy Drive Controller Board
A floppy drive controller card, included with the floppy drive option, provides the
interface between the instrument processor and the 3.5" drive unit. This is mounted
towards the right rear of the unit stacked above the processor board and above or below
the IEEE-488 board (order of these two is not important). Connection to the drive unit
itself is made by an interconnecting cable.
Theory
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