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|  MIL-N-81604C(AS)
Para 3.5.1.9.1c
(cont)
+5 VDC Monitor - This shall bean analog test
(2)
*
point signal monitoring the +5 volts d-c
switching regulator output. The range on
*
this output signal for a Go or true condition
*
shall be +4.75 to +5.25 volts d-c when looking
into an open circuit.
-5 VDC Monitor - This shall be an analog test
(3)
*
point signal monitoring the -5 volt d-c
switching regulator output. The range on
this output signal for a Go or true condition
*
shall be -4.75 to -5.25 volts d-c when looking
*
into an open circuit.
+15 VDC Monitor - This shall be an analog test
(4)
*
point signal output monitoring the +15 volt
*
d-c regulator output. The +15 volts shall be
*
divided down to a +5 volt d-c output within
the IMU. The range on this output signal
for a Go or true condition shall be +4.85 to
*
+5.35 volts d-c when looking into an open
circuit.
-15 VDC Monitor - This shall be an analog
(5)
test point signal output monitoring the
*
-15 volt d-c regulator output. This signal
shall be divided down and tolerance the
*
same as the -15 volt d-c (memory) monitor.
4.8 KHz Clock (square Wave) - This signal
(6)
shall be the output of the 4.8 KHz clock in
the IMU. It shall be a square wave output
at a frequency of 4.8 KHz 0.02 percent,
*
with output levels of +3.8 1.4 volts d-c
*
and +0.25V 0.25 volts d-c.
*
Gyro Spin D-C Monitor -
This signal shall
(7)
*
monitor the output of the gyro spin d-c
circuitry which will have two distinct
operating states. The range, during the
*
high state, for a Go or true condition shall
be 4.1 VDC 10% when looking into an open
circuit. The range, during the low voltage
*
state for a Go or true condition shall be
*
+2.15 to +2.65 volts d-c when looking into
an open circuit.
95
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