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OPERA TOR'S
&
MAINTENANCE MANUAL
page 6.
2.2 X ADDRESS
The X ADDRESS switch is an 11 position, 1 pole rotary switch. It selects amplifier outputs,
the internal time base (TIME) and the compute time output (CTP.) Its wiper is connected
to the rear terminal X OUTPUT and the GND/X position of the Y/POT ADDRESS switch,
pot selector section.
2.3 MODE CONTROL
The following system integrator modes are controlled with the four mode control push
buttons.
2.3.1 Initial Condition
Depression of the IC push button pulls the OP bus to ground for reset of system
integrators.
2.3.2 Hold
Depression of the HD push buttons pulls the OP bus to a hold mode control voltage
level (approximately -2 volts) for placement of system integrators into a hold mode
condition.
2.3.3 Operate
Depression of the OP push button releases the OP bus to an operate mode control
level (-5 to -15 volts) for placement of system integrators into a slow time, operate
condition.
2.3.4 Repetitive Operation
Depression of the RO push button de-energizes the integrator time scale relays and
connects the OP bus to the repetitive operation timing unit mode control. Integrator
time constants are reduced by a factor of 400 and mode control is repetitively
switched from initial condition to operate.
2.4 MODE SELECTOR
The MODE SELECTOR switch is a 2 position, 12 pole rotary switch. It selects the
following functions to distinguish between the computer's POT SET and OPR modes.
2.4.1 Setting of Coefficient Potentiometers
The top end input to each coefficient potentiometer is connected to one of eight
poles. In the OPR position, the poles are switched to the patch panel input; in POT
SET, the poles are switch to
+
1
O
volts. Thus in the pot set mode the inputs to all
potentiometers are replaced by computer reference and the potentiometer output
values are measurements of the settings.
2.4.2 Internal Digital Voltmeter
One pole is connected to the DVM input. In POT SET, the pole is switched to the
Y/POT ADDRESS switch wiper, pot selector section; in OPR the pole is switched to
the rear terminal METER INPUT.
2.4.3 Integrator Mode Control
One pole is connected to the rear terminal OP OUTPUT. In POT SET, the pole is
switched to ground; in OPR the pole is switched to the push button mode control
switch selection. Thus in the pot set mode, all integrators are placed into an initial
condition state; in the operate mode, all integrators are controlled by the push button
selections.
2.4.4 Compute Time Period Amplifier
Two poles are used to program the CTP amplifier, shown in Figures 2-1 and 2-2. The
CTP amplfier is a part of the Timer PC board assembly.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - C O M DYNA, INC.
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