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|  MIL-N-81604C(AS)
Appendix I
Para 30.5.6.6
(cont)
1A2 Laminate - This laminate shall contain the
b.
A/D digital logic and true heading logic.
2A1 Laminate - This laminate shall contain the
c.
discrete signal circuitry with line drivers
and receivers.
2A2 Laminate - This laminate shall contain the
d.
*
true heading converter (D/A) electronics.
3A1 Laminate - This laminate shall contain the
e.
*
magnetic variation and sine latitude converter
logic.
3A2 Laminate - This laminate shall contain the
f.
magnetic variation and sine latitude digital
logic and the CIU interface.
4A1 Laminate - This laminate shall contain the
ANCU/Avionics serial interface message and
control logic.
4A2 Laminate - This laminate shall contain the
h.
ANCU/Avionics serial interface clock and
registers.
30.5.7 CAU/Avionics Synchro Interface - Phasing of all inputs
and outputs (except for roll and pitch no. 2 and no. 3 outputs)
shall be as follows: For zero degrees, E(Y-X) = 0 volts and
E(Z-X) is an in-phase voltage: for an increasing angle, E(Y-X)
is an increasing in-phase voltage. Refer to Notes 14 and 15
of figure 33.
Phasing for roll and pitch no. 2 and no. 3 outputs shall be as
follows: For zero degrees, E(Y-X) = O volts and E(Z-X) is an
out-of-phase voltage: for an increasing angle, E(Y-X) is an
increasing out-of-phase voltage.
30.5.7.1 Svnchro Input
Maanetic Heading - The HARS will provide the
.
CAU with a synchro transmitter (CX) input
(phase C excitation) of smoothed magnetic
heading from Compass Adapter MX-6985/ASN-50.
The maximum rate of change of the input will be
200 deg/sec. The CAU shall load the input with
a control transformer (CT) equivalent to a
26V-08CT4C.
.
161
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