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Page Title:
Signals to Multipurpose Display 1 Logic |
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|  MIL-D-81347C(AS)
3.5.3.4.4.2.1.1.6
Signals from Computer - The computer shall transmit 16 bit
diagnostic words to the MTL, via the MCP, by means of External Function Request/External Function
operation as described in Appendix L
3.5.3.4.4.2.1.1.7
Signals from Maintenance Control Panel - The MCP shall trans-
m it the On Line and Verify switch status lines for manual MTL operation.
3.5.3.4.4.2.1.2
Output Requirements - The MTL shall transmit signals, as
shown in Figure 129, to the MPD 1 Logic, MPD 2, MPD 2 Logic, Radar Interface Unit, Radar Scan
Converter, Spare Scan Converter, PDL, FGL, Computer, MCP and LLLTV control. Relative timing
requirements for these signals are shown in Figure 128.
Signals to Multipurpose Display 1 - The MTL shall transmit the
3.5.3.4.4.2.1.2.1
Radar Scan Converter Unblank to MPD 1 under the conditions of 3. 5.3.4.4,2.1.1.1 (l). This signal
shall be a logical "1" 50 microseconds + 1 microsecond after the 40 Hz sync and shall drop to a
.
logical "O" 17.45 msec +10% later.
3.5.3.4.4.2.1.2.2
Signals to Multipurpose Display 1 Logic - The MTL shall transmit
.
signals to the MPD 1 Logic as follows:
(1) 40 or 57.1 Hz Sync - a four sec + 1.0 sec pulse every 25
or 17.5 msec +10% as selected by the "LLLTV Active" line, via the MCP, as per 3.5.3.4.4.2.1.1. 2(3).
--
(2) 1 Hz Flash - a signal which is alternately high and low
every half second +10%.
(3) Radar Scan Converter Enable - a signal which is a logical
"l" for 17.5 msec 10% initiated by the 40 Hz sync under the conditions of 3.5.3.4.4.2.1.1.1(1).
(4) Spare Scan Converter Enable - a signal which shall be
variable between 17.5 and 22.5 milliseconds in increments of 2.5 milliseconds. The signal duration
shall be selected by a wiring change. This signal is initiated by the 40 Hz sync under the conditions
of 3.5.3.4.4.2.1.1. 1(2), and shall have a timing tolerance of +10%.
(5) Diagnostic Instruction - The MTL shall transmit six lines
of diagnostic instruction to MPDL 1.
(6) Clock - The MTL shall transmit a 2.000 MHz square wave
to MPDL 1.
Signals to Multipurpose Display 2 - The MTL shall transmit the
3.5.3.4.4.2.1.2.3
Radar Scan Converter Unblank to MPD 2 under the conditions of 3.5.3.4.4.2.1.1.2(1). This signal is
as described in 3.5.3.4.4.2.1.2.1.
Signals to Multipurpose Display 2 Logic - The MTL shall trans-
3.5.3.4.4.2.1.2.4
mit the same signals to the MPD 2 Logic as those that are transmitted to MPD 1 Logic, specified in
3.5.3.4.4.2.1.2.2.
.
Signal to Radar Interface Unit - The MTL shall transmit the 1
3.5.3.4.4.2.1.2.5
Hz Flash signal continuously to the Radar Interface Unit.
Signal to Spare Scan Converter - The MTL shall transmit the
3.5.3.4.4.2.1.2.6
SPARE S. C. Enable to the Spare Scan Converter under the conditions of 3.5.3.4.4.2.1.1. 1(2) and
3.5.3.4.4.2,1.1.2(2). This signal is described in 3.5.3.4.4.2. 1.2.2(4).
Signals to Pilot Display Logic - The MTL shall transmit signals
3.5.3.4.4.2.1.2.7
to the PDL as follows:
(1) 40 Hz Sync - As per 3.5.3.4.4.2.1.2.2(1).
(2) 1 Hz Flash - As per 3.5.3.4.4.2.1.2.2(2).
218
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