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Page Title: Table 5-7. Lamp Display Decoder Logic Outputs to Front Panel
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T.O. 31W2-2GSC24-2
TM 11-5805-688-14-1
NAVELEX 0967-LP-545-3010
Table 5-7. Lamp Display Decoder Logic Outputs to Front Panel
Encoder U7
Output
Pin
Input
Decode Output
Enabled
Pin No.
9
7
6
14
From Decoder Logic
Front Panel Indicator
5
1
1
1
1
LMTIM
LOSS OF MUX TIMING
4
0
0
0
0
LMCRD
MULTIPLEXER CARD
3
0
0
1
0
LMCRD
MULTIPLEXER CARD
2
0
1
0
0
LMCDR
MULTIPLEXER CARD
1
0
1
1
0
LDTIM
LOSS OF DEMUX TIMING
13
1
0
0
0
LDCRD
DEMULTIPLEXER CARD
12
1
0
1
0
LDCRD
DEMULTIPLEXER CARD
11
1
1
0
0
LDCRD
DEMULTIPLEXER CARD
10
1
1
1
0
LMOOT
MULTIPLEXER OUT OF TOL
The low-level GS output from U33 is the error input to
5-598. In the out-of-tolerance error detection function,
system priority encoder U7.The error input to U7 is
end of scan signal MEOS3N1 clocks flip-flop U10-9.
enabled if no error input having a higher priority status is
Flip- flop U10-9, in turn, increments channel address
applied to U7. The card address applied to the card ad-
counter U26. Counter U26 produces sequential channel
dress encoder is processed in the same manner as
addresses that select the inputs to address out-of-
previously described.
tolerance multiplexer U34. The channel address from
U26 is also applied to channel address comparator U18.
The maximum channel count from U26 is con- trolled by
U18. When the channel ad- dress from U26 to U18 is
5-597. Demultiplexer  common  card  error  priority
the same as the channel address contained in maximum
encoder  U31  processes  error  signals  from  the
channel address signals CHMAX0 through CHMAX3 that
demultiplexer  common cards  in  the  same  basic
are applied from the Seq card to U18, an A=B output
sequences de- scribed for multiplexer priority encoder
from U18 re- sets the channel address counter. When
U33. Encoder U31 uses three out- puts (Y0, Y1, and Y2)
out-of-tolerance signal OOTXX- is applied to a input on
to provide output codes for the eight inputs applied to it.
U34, a high is applied from U34 to AND gate U11-6.
A logic decoder circuit in the out- put of U31 decodes any
AND gate U11-6, in turn, applies a low trigger signal to
one of the eight error conditions to a card address of one
enable one-shot multi- vibrator U1-9. The output from
of  the  four  common  cards  being  monitored.
one-shot multivibrator U1-9 holds flip-flop U10 in a preset
condition for approximately 1.5 seconds.
5-162

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