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|  MIL-N-81604C(AS)
Para 3.4.4.2a(3)
(cont)
which occur for a minimm of 20 milliseconds.
The line receiver in the IMU shall be a Type
C circuit.
Platform Attitude and Heading - Table,IX presents
b.
the synchro and resolver characteristics.
Pitch Angle - This three-wire signal shall be
(1)
supplied from the same synchro in the IMU
*
which supplied the pitch angle in 3.4.4.1g(1) .
*
The load applied to this synchro output must,
*
therefore, be consistent with the synchro
*
output described in table IX and the converter
*
input described in table X.
Roll Angle - This three-wire signal shall be
(2)
supplied from the same synchro in the IMU
*
which supplied the roll angle in 3.4.4.1g(2).
*
The load applied to this synchro output must,
*
therefore, be consistent with the synchro
*
output described in table IX and the converter
*
input described in table X.
Platform Heading (X1) - This four-wire signal
(3)
shall be supplied from the same resolver in
the IMU which supplied the heading angle in
*
3.4.4.1g(4). The load applied to this resolv-
*
er output must, therefore, be consistent with
*
the resolver output described in table IX and
*
the converter input described in table X.
Platform Heading (X8) - This four-wire signal
(4)
shall be supplied from the same resolver in
the IMU which supplied the heading angle in
*
3.4.4.1g(4). The load applied to this resolv-
*
er output must, therefore, be consistent with
*
the resolver output described in table IX and
*
the converter input described in table X.
Synchro Excitation - Excitation shall be provided
c.
to the IMU pitch and roll synchros and the heading
*
resolver. The excitation shall be 26 VAC, 400 Hz.
Refer to 3.4.4.3.4.
53
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