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|  MIL-D-81347C(AS)
(1) X and Y Deflection Signals -The X and Y deflection signal
characteristics shall be as described in 3.5.4.4.3.4.1.471 . Transition times for gross
positioning signals shall be less than 4.0 microseconds.
(2) "Z" Axis Video - This signal shall be positive going from O
to between 2.0 to 2.5 volts peak. The video signal shall provide the following voltage levels in order
to obtain uniform brightness on the CRT for conic and character generation.
(a) Conic
Video voltage +5%
%-Maximum radius displayed
50% X Maximum voltage
0 - 25%
65% X Maximum voltage
26- 50%
80% X Maximum voltage
51- 75%
76- 100%
Maximum voltage
(b) Character
Character Video Voltage = 50% x Maximum Voltage +5%.
(3) Unblank - This signal shall be 5.0 +1.5 volts with a rise
time and fall time not to exceed 100 nanoseconds when measured at the 10% and 90% amplitude points.
Word Formats - The Auxiliary Display Logic word formats are
3.5.4.4.3.5
shown in Figures 142 through 146. There will be four basic types of word formats used in the ADL as
follows:
(1) Display Instruction Word - An ODR word to the ADL indicat-
ing a display function.
(2) Diagnostic Instruction Word - An ODR word to the ADL
instructing the ADL to execute a diagnostic test mode.
(3) Diagnostic Data - An IDR word to the DMS containing diagnos-
tic data as a result of a Diagnostic Instruction Word.
(4) Frame Start - An EI word to the computer via the DMS indicat-
ing the occurrence of a 40 Hz sync pulse.
Output Word Format - The Auxiliary Display Logic shall be
3.5.4.4.3.5.1
capable of recognizing a display instruction word or diagnostic instruction word formats. All of these
programming words will be of 30 bit lengths. with bit "29" being the Most Significant Bit (MSB) and
bit "0" being the Least Significant Bit (LSB). Not all of the data bits contained in the instruction words
will be used.
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