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MIL-F-48673 (AR)
The panel contains 5 main connectors,
3. 2.2.5 Connectors.
these are:
Power IN.
a.
Connects external 28 Volt input power to
FCC. J4
FCC
b.
TEST.
Connects
control,
display,
and
test
signals
between
Fcc-FTS
and  FCC.  J1
FCC POWER.
Connects the +28 volt input power from the
c.
F CC- FTS to the FCC. J3
d.   FCC 1/0.  Connects digital 1/0 interface signals
between FCC-FTS and FCC. J2
e.  SELF'-TEST.  Connects Self-Test logic to the FCC TEST
and FCC 1/0 Connectors. J5
3.4.3 Major commnent characteristics.
3.2.3.1 Combination case.  combination case shall be provided
to house the Test Set compnents and protect them against adverse
environmental conditions.  The case provides storage for the
instruction manual and Test Set cables.
I
3.2.3.2 Control panel.  The control panel contains the controls
and displays which perform the functions as specified in paragraph
3.2.1.  The control panel layout shall be shown in Figure 1.
Control and display functions are as follows:
TEST SELECT switches.  Octal thumbwheel switches to
provide for up to 512 programmed diagnostic routines which can be
executed by the FCC processor.
b.  TEST RESULTS display.  Six 7-segment indicators to
display octal codes representing test results.
SINGLE/LOOP mode switch.  Alternate action switch which
c.
controls whether the test routine will be executed once or
repetitively to isolate faults that are intermittent in nature.  The
mode selected shall be illuminated on the switch.
START mode switch.  When depressed and released,
d.
instructs the program to begin the test routine selected on the TEST
SELECT thumbwheel switches and remains illuminated while the routine
is being executed.
6

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