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Page Title:
Signals from Master Timing Logic |
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|  MIL-D-81347C(AS)
(3) Diagnostic
Instruction - The MTL shall transmit six lines
of diagnostic instruction to the PDL.
(4) Clock - The MTL shall transmit a 1.536 MHz square wave
to the PDL.
(5) Diagnostic Instruction - The MTL shall transmit six lines
of diagnostic instruction to MPDL #l.
(6) Clock - The MTL shall transmit a 2.000 MHz square wave
to MPDL #1.
Signal to Radar Scan Converter - The MTL shall transmit the
3.5.3.4.4.2.1.2.8
Radar S. C. Enable to the Radar Scan Converter under the conditions of 3.5.3 .4.4.2.1.1.1(1) and
3.5.3.4.4.2.1.1.2(1). This signal is described in 3.5.3.4.4.2.1. 2.2(3).
Signal to LLLTV Control - The MTL shall transmit the 57.1
3.5.3.4.4.2.1.2.9
Hz Sync signal to the LLLTV Control Unit each 17.5 milliseconds. This signal shall have a pulse
width (logical "1") of 2.5 milliseconds.
Signal to Computer - The MTL shall transmit 26 bits of
3.5.3.4.4.2.1.2.10
diagnostic data to the computer via the MCP. This shall be accomplished through the use of Input Data
Request/Input Acknowledge operation of the computer as described in Appendix I.
Signals to Maintenance Control Panel - The MTL shall transmit
3.5,3.4,4.2.1.2.11
clock signals to the MCP.
3.5.3.4.4.2.2
Signal Characteristics
3.5.3.4.4.2.2.1
Signals to Master Timing Logic - The signals to the MTL de-
scribed herein shall be levels where +5+1. 5 volts represents a logical "1" and 0+0.5,-0 volt,
represents a logical "0".
3.5.3.4.4.2.2.2
Signals from Master Timing Logic
(1) Twisted Pair Transmissions - The following output signals
from the MTL shall be transmitted via twisted Pair cable. Each pair shall be driven by line driver
circuits as referenced in WR101 Part H and terminated by input amplifiers as specified in Appendix H
or their electrical equivalent.
(a) 57.1 Hz Sync to LLLTV Control
(b) 1 Hz Flash to Radar Interface Unit
A logical "0" shall be 4 1 volts, a logical "1" shall be 0 +0.5, -0.0 volts. Transition times shall be
less than one microsecond when measured at the 10% and 90% points.
(2) Triaxial Transmissions - All triaxial transmissions shall
be via Amphenol 421-033 cable or equivalent, terminated in a differential amplifier, whose input im-
pedance shall be 90 to 95 ohms and a 100 picofarads maximum. The following signals shall be trans-
mitted via triaxial cables. The triaxial cable length shall not exceed 100 feet.
(a) Radar Scan Converter Unblank to MPD 1
(b) Radar Scan Converter Unblank to MPD 2
(c) Radar Scan Converter Enable to Spare Scan Converter
(d) Spare Scan Converter Enable to Spare Scan Converter
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