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|  MIL-N-81497A(AS)
3.4.3.2.1 (Continued)
Pulse Train Characteristics/Interface
(3)
Capabllltles-
Pulse Amplitude:
(a)
0 0.5 VDC
Logic 1:
+4 1.0 VDC
Logic O:
Pulse Width: +5
. . . microseconds
(b)
(SEC)
Minimum Spacing Between Pulses
(c)
SEC
Signal Line: 40
SEC between successive
45
Dual Line:
positive and negative pulses.
Rise and Fall Time:
1
SEC
maximum
(d)
(4)
Doppler Available Discrete -
Logic
(a)
0 0.5 VDC
Logic 1:
Doppler Good:
+4 1 VDC
Doppler Not Good:
Logic 0:
Doppler Siqnal Input/Output Circuit
(5)
Characteristics - In accordance with Figure 4.
3.4.3.2.2
Magnetic Azimuth Detector (ML-1) Interface - ML-1
signal electrical characteristics shall be in accordance with MIL-T-19576.
Altimeter Interface - The equipment shall accept
3.4.3.2.3
parallel data from the Altimeter (type AAU21) under Computer, Navi-
gation program control in accordance with the following requirements:
(1) Range - The altimeter output shall indicate
an altitude range of -1000 to +38,000 feet.
(2) Code - Standard ICOA Altitude Telemetry code
shall be used, A binary 1 shall be represented
by a continuity, a binary 0 by an open circuit.
18
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