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CHAPTER 10
CONTROL TRAY
10.1
INTRODUCTION
The 0.12.1607 Control Tray (Figure 10.1) provides patch terminals for various
inputs, outputs and control functions.
Since the functions of the patch ter-
minals (or groups of patch terminals) are not related, each is described separ-
ately.
10.2
DVM PATCH TERMINAL
The DVM patch terminal provides an input to the DVM when the PP pushbutton on
the ADDRESS switch is depressed.
This provision permits the DVM to readout
any voltage not capable of being addressed.
10.3
VM PATCH TERMINAL
The VM patch terminal is used primarily when the computer is not equipped
with a DVM.
This patch terminal provides an input to the VM when the VM
FUNCTION switch is placed in the PP position.
The RANGE switch selects the
proper meter
rang~
for the input voltage.
10.4
IC AND OP PATCH TERMINALS
The IC and OP patch terminals provide inputs to their respective bus bars
through a series of gates and inverters.
To utilize these inputs, it is
necessary to depress the analog mode PP pushbutton on the main control panel.
Once this is done, control of the IC and OP bus bars is assumed by these inputs.
A high in either patch terminal forces the respective bus bars high.
A low
input forces the bus bars low.
Table 10.1 defines the computer modes resulting
from the possible IC and OP inputs.
Table 10.1.
Computer Modes
Input
Mode
Terminals
OP
IC
HD
OP
1
0
1
0
IC
0
1
1
0
Note from the table that the IC signal overrides the OP signal, i.e., if the
OP patch terminal is held high, the integrators may be switched between the
OP and IC modes by switching the IC signal.
10-1
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