SYSTEM BLOCK DIAGRAM DISCUSSION

T.O. 31W2-2GSC24-2

TM 11-5805-688-14-1

NAVELEX 0967-LP-545-3010

Therefore, the priority encoding circuits are configured to

LMTIM is generated and applied to the front panel to light

select the probable error source and inhibit the other

the LOSS OF MUX TIMING indicator. Signal MLOT

error conditions that may be generated. The priority

indicates that the system timing from an external source

assigned to each of the diagnostic error inputs to the

to the multiplexer set is faulty. Therefore, the signal

display card is described in the display card discussion in

does not represent a local card error and no card

paragraph 5-568.

address is displayed on the FAULT LOCATION

numerical display on the front panel.

5-143. The overall diagnostic functional block diagram

discussion is divided into two paragraphs: paragraphs 5-

5-147. When a diagnostic error signal MRT-, MLEOS-,

144 through 5-153 contain a general block diagram

MSEQ-, MDM-, MGC-, or MTMOG-, which represents a

discussion of the overall diagnostic circuit functions in

common card error condition, is generated and applied

the multiplexer set and paragraphs 5-154 through 5-163

to the display card, mux card error signal LMCRD is

contain a detailed block diagram discussion of the

generated and applied to the front panel to light the

control and indicator functions on the front panel. The

MULTIPLEXER CARD indicator. An error condition,

following discussions are associated with the overall

representing a channel card, in signal MPSA also causes

diagnostic block diagram in figure 5-10

the MULTIPLEXER CARD indicator to light. The display

card also generates the faulty card address associated

with the diagnostic error signal. The card address

5-144. SYSTEM BLOCK DIAGRAM DISCUSSION

consists of tens address signals TAO and TA1 that

contain the tens digit 0, 1, or 2, and unit address signals

5-145. In the multiplexer function, two diagnostic error

UAO, UA1, UA2, and UA3 that contain the units digit that

signals from each of the four common cards are applied

is between 0 aid 9 The signals are decoded on the front

to the display card.

Each channel card in the

panel to produce the proper card location (between 1

configuration generates a diagnostic error status signal

and 22) displayed on the FAULT LOCATION numerical

that is transmitted on the positive stuff request line

display. 5-148. When out-of-tolerance signal OOTXX

(MPSTXX) to the OEG card during word 24. The OEG

from an RCB or a TE/TR channel card is in the error

card, in turn, multiplexes the applied signals (MPSTXX)

state, the display card generates signal IMOOT that

into one serial positive stuff acknowledge signal (MPSA)

lights the MULTIPLEXER OUT OF TOL indicator on the

that is applied to the display card. On the display card,

front panel. The card address associated with the

each of the signals that make up MIPSA is monitored for

applied signal is also generated and applied to the front

an error or no-error condition. Each RCB and TE/TR

panel from the display card to produce the appropriate

card in a configuration also generates diagnostic out-of-

card location on the FAULT LOCATION numerical

tolerance signal OOTXX that is applied to the display

display.

card. A VE card does not generate signal OOTXX-, but

does generate a diagnostic error status in signal

5-149. In the demultiplexer function, 11 diagnostic error

MPSTXX to the OEG card.

signal inputs are generated from the common cards and

applied to the display card. Card error signal DPSTXX

5-146. When multiplexer loss-of-timing signal MLOT- is

from each channel card in

applied from the RT card to the display card, signal

5-32