from the m eter when the METER FUNCTION switch is at SET B+ or INPUT, making it unneces
sary to disconnect the external read-out unit when checking the power supply voltage. Likewise,
the METER INPUT term inals are disconnected atall positions of the METER FUNCTION switch
except INPUT.
The outputs of the three initial condition power supplies are connected to binding posts on the
panel immediately under the controls for the supplies. The outputs are not grounded, making
it possible to use either the plus (red) o r minus (black) terminal for the "hot" terminal. Since
the supplies are not grounded, it is n ecessary to ground one of the term inals of each supply in
use. The output is z ero when the control is full counter clockw ise; turning the control clockw ise
in creases the output up to 105 volts, with a maximum current of 5 ma.
Five coefficient potentiometers are provided on the panel. One end terminal is grounded, with
the other end terminal and the center terminal connected to binding posts on the panel. The
center terminal of the control (black binding post) is grounded when the control is in full counter
clockw ise position. The ungrounded end terminal (red binding post) w ill be connected to the IC
supply voltage of the required potential.
A 4PST relay is used for inserting initial conditions and for rem oving residual voltages from the
am plifiers. For convenience, the connections to the relay contacts are brought to binding posts
on the panel where they may be connected a cro ss problem components as required. The relay
contacts are norm ally closed. Turning the OPERATION switch to MANUAL will start solution
of a problem by opening the relay contacts, which will rem ain open until the switch is returned
to RESET. Setting the OPERATION switch to REPETITIVE will connect the relay to the repeti
tive oscilla tor, opening and closing the contacts at a rate determined by the REPETITION RATE
control on the panel. Turning the control clockw ise in creases the rate of operation from the
minimum of approxim ately 0.1 cps to the maximum of approxim ately 15 cps.
Computing components are connected to the am plifiers by means of 2-prong plugs inserted
into sockets on the panel. Suggested methods of mounting components on the plugs a re shown in
Figure 25 in the Construction Manual.
BASIC MATHEMATICAL OPERATIONS
ADDITION
Two quantities can be added by feeding two voltages, proportional to the quantities, into an
am plifier, as shown in Figure 16.
Figure 16
AMPLIFIER USED FOR ADDITION
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