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portion of the patching module; the lower switch is terminated on the lower portion
of the patching module.
The switch contacts are rated at 120 volts, 10 amperes
(resistive load).
11.
REPETITIVE OPERATION
~.
General Description
The addition of the Repetitive Operation (Rep Op) Group to the TR-20 provides a
means of switching the integrators between the reset and operate modes at rates
greater than 30 cycles per second.
The usual 10 mfd integrator feedback capacitors
are replaced with 0.02 mfd capacitors to change the problem time scale by a factor
of 500.
Thus, the Rep Op Group gives the operator faster acquisitionof problem
solutions.
The problem variables are displayed on the Model 34.035 Rep Op Display
Unit, or an external oscilloscope.
The computer can still be used as a real time
simulator when the Rep Op Group is installed.
The Repetitive Operation Group consists of three units:
(1)
A Model 20.532 Control Panel, which mounts in the sloping control
panel area of the TR-20.
It contains two controls, the COMPUTE TIME MILLISEC
switch and the CALIBRATE VERNIER potentiometer, that determine the length of time
the integrators are in operate.
The COMPUTE TIME MILLISEC switch has an OFF
position, four compute time positions of 20, 50, 100, and 200 milliseconds, and
a SLAVE position.
The CALIBRATE VERNIER permits continuous coverage between the
fixed compute times and can increase the selected compute time by a factor of 2.5.
(2)
A timing Unit that is located in the rear of the computer.
It pro-
vides the integrator networks with a reset pulse that has a constant 10 milli-
second duration and an operate pulse whose duration is determined by the position
of the COMPUTE TIME MILLISEC switch and the CALIBRATE VERNIER.
(3)
The Model 12.1115 Integrator Net-';;\Torks replace the standard Model
12.1116 Networks in computers equipped with repetitive operation.
These net-
works are described in Paragraph 5 of this handbook.
(4)
The
34~035
Repetitive Operation Display Unit is available as an
accessory.
It provides a large rectangular display and provision for up to four
Y
(vertical) inputs, which may be applied singly or through a four-position se-
quential electronic switch.
A
cable is provided with the unit which allows con-
venient installation, and signals to be observed are simply connected to the appro-
priate terminals on the readout patching module.
An additional feature included
with this unit is the ability to use the time base output from the Rep Op Timing
Unit as a sweep (X) input, or by rotating a switch, the
Y~
input at the readout
patching module provides a time base against which the other
Y
inputs
(Y
l
,
Y
2
, or
Y
3 ) may be
plott~d.
Operating and maintenance instructions for the Model 34.035 are provided in a
separate manual supplied with this instrument.
53
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