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|  MIL-N-81604C(AS)
Appendix I
30.5.7.2 Synchro Outputs
Magnetic Heading No. 1 - The CAU shall supply
a.
a CX output (phase C excitation) of magnetic
heading to the TACAN navigation set. The
output source shall be a CX, equivalent to a
26V-11TX4c. The maximum rate of change of the
output shall be 200 deg/sec. The accuracy shall
be 15 arcminutes (lo) plus 0.2 arcminutes/deg/see, *
assuming a perfect magnetic heading input
(refer to 30.5.7.1).
*
b.
Magnetic Heading No. 2 - The CAU shall supply
a CX output (phase C excitation) of magnetic
*
heading to two Bearing-Distance-Heading
Indicators (BDHI's), ID-663/U (MIL-I-22075).
The characteristics of this output shall be
*
identical to magnetic heading no. 1 (refer to
30.5.7.2a).
Magnetic Heading No. 3 - The CAU shall supply
cm
a CX output (phase C excitation) of magnetic
heading to the Course Indicator and the co-
...
pilots BDHI. The characteristics of this out-
*
put shall be identical to magnetic heading no. 1
*
(refer to 3005.7.2a).
4 - The CAU shall supply
Magnetic Heading No.
d.
*
a CX output (phase C
excitation) of magnetic
heading to the CIG.
*
The characteristics of
this output shall be
identical to magnetic
*
*
heading no. 1 (refer
to 30.5.7.2a).
e.
Magnetic Variation - The CAU shall supply a
synchro differential transmitter (CDX) output
*
of magnetic variation to HARS Adapter
cv-()/AsN-50.
The output source shall be a
CDX equivalent to a 26V-08CDX4C. The maximum
rate of change of the output shall be
200 deg/sec. The accuracy shall be 0.25
degrees (lo) in the normal mode. The accuracy
in the magnetic slaved backup mode shall be
0.25 degree for
magnetic variation <45,
0.5 degree for 45<
magnetic variation] < 90,
and 1.0 degree for 90<
magnetic variation]
<1800(10). All of the accuracies assume a
perfect magnetic heading input (refer to
30.5.7.1a).
162
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