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|  MIL-N-81604C(AS)
Para 3.5.1.9.1c
(cont)
70 VDC (Floating) Monitor - This signal shall
(8)
*
monitor the output of the +70 volt d-c
*
(floating) output of the gyro spin d-c
circuitry which has two distinct operating
states . The range, during the high voltage
state, for a Go or true condition shall be
*
+4.7 to +5.7 volts d-c when looking into
*
an open circuit. The range, during the low
*
voltage state, for a Go or true condition
*
shall be +3.3 to +4.1 volts d-c when looking
into an open circuit.
(9)
C&M Discrete Monitor - This signal shall be
a discrete indicating the state (high or low)
of the gyro spin voltage, based on the gyro
float temperature. The high level shall be
indicated by -3.4 to -5.0 volts d-c. The low
*
level is indicated by +3.4 to +5.0 volt d-c
*
output .
+28 VDC Monitor - This signal shall be an
(10)
analog signal output which monitors the
+28 volt d-c input from the test equipment.
*
The range on this output signal for a Go or
*
true condition shall be +4.4 to +5.4 volts
*
d-c .
*
(11)
X Accelerometer Out - This signal shall be an
analog d-c test point output of the X accelerom-
*
eter. The voltage out will normally be at
zero when the IMU stable element is level.
*
When oriented in a +1g field, the output
*
of the signal shall be +1.03 volts d-c 1
percent.
In a -1g field, the output shall
be -1.03 volts d-c 1 percent.
*
Y Accelerometer Out - This signal shall be
(12)
identical to the X accelerometer test point
output, but along the Y axis.
Z Accelerometer Out - This signal shall be
(13)
identical to the X accelerometer test point
output, but along the Z axis, except that its
normal position is in a +1g field with the
IMU stable element level.
96
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