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|  MIL-N-81497A(AS)
Clutched Synchro Output -
3. 4.3.4.3
(1) Synchro - Kearfott CM09609005 or equivalent
(2) Scale Factor - One DEG of synchro angle per 1 DEG
of heading angle.
(3) Clutch Rotational Bridge - 60 DEG; spring returned
to 0 DEG after de-energization.
(4) Function versus Operational Mode -
Function
Mode
Clutched True Heading
Inertial
Clutched Stabilized Magnetic Heading
Slave
Clutched, Non-Slewable Grid Heading
Free
Do Not Use
Compass
(5) Electrical Characteristics -
(a) Clutch Excitation (externally provided) :
V DC
Range: +28
0.22 ampere, maximum
Input Current:
Synchro Excitation (externally provided).
(b)
26V, single phase, 400 Hz
Excitation:
0.10 ampere, maximum
Input Current:
(c) Output Characteristics
14.2 + j3 ohms (nominal)
Source Impedance (ZSS):
175 MV/DEG 10 percent
Electrical Scale Factor:
30 3 DEG
Phase Shift Lead:
25 MV
Null Voltage:
one 5000 ohm resistor across output
(d) Load:
connections Y, Z.
Represent zero heading angle
Electrical Zero:
(e)
at the time of clutch engage-
ment.
Central Data Processor Interface - The equipment
3.4.3.4.4
shall provide VN/S and VE/W in 14 bit serial and true heading in 15
bit serial data to an external Central Data Processor in accordance
with the following requirements in the Navigate and Damp On submodes
of the Inertial Mode. Velocity data (VN/S;VE/W) shall be ground
speed referenced.
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