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Page Title:
Gyro Torquing Outputs Signals (GYPTO) to Gyroscope Assembly |
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|  MIL-N-81497A(AS)
Central Data Processor Interface - See 3.4.3.4.4.
3.5.5.12.6
Gyro Torquing Outputs Signals (GYPTO) to Gyroscope
3.5.5.12.7
Assembly - Three channels of incremental pulse information shall be
supplied to the 3 GYPTO's in the Gyroscope Assembly. Each channel
shall have two seperate lines; a positive and a negative command output.
The command pulse rate for each channel shall be a fixed frequency of
approximately 200 PPS. The stability of the pulses shall be maintained
to 10 parts per million with a minimum pulse width of 5 SEC. Turn
off commands shall appear on the Z channel only and shall be used to
turn off all channels. Turn off commands shall appear coincidently on
both Z lines in order that they may be distinguished from the turn on
pulses. Turn off pulses shall be generated 4500 SEC after the occur-
ence of turn on signals. The period of each turn on pulse shall be
5000 SEC.
Indicator, Position Latitude and Longitude Display
3.5.5.12.8
Signals - See 3.5.3.7.
Heading Analog Output - The computer shall provide
3.5.5.12.9
one analog signal equivalent to a nominal 11.8V, 400 Hz synchro output
with electrical phasing in accordance with ARINC 407 and 407-1. This
output signal shall be capable of driving one 500 ohm (ZSO) control
transformer in the Control, Gyroscope Assembly.
3.5.5.12.10 Input Discretes - The Computer, Navigation shall
have provision to accept 26 input descretes, detectable under program
control.
3.5.5.12.11 Output Discretes - The Computer, Navigation shall
have provision to set and reset 32 discrete outputs under program control.
protection Circuitry - The Computer, Navigation
3.5.5.13
shall incorporate circuitry as necessary to prevent destruction of the
memory contents as a result of power shutdown or input DC power failure.
Upon shutdown the control logic shall ensure completion of commands
necessary to ensure that the computer will be ready for an orderly
restart when the DC voltages are again applied to the computer. DC power
shall be provided to the computer for 0.1 MS after it receives a power
turn off signal.
3.5.5.14
Computer Binary Logic Signal Levels -
Logic 1 level:
Logic 0 level:
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