Comtech EF Data C5 - Manual (Page 235)

C5/K1/K3 Integrated Satellite Terminal System System Checkout
Rev. 0 6-11
Table 6-2. Fault Tree (Continued)
TX INTERFACE FAULTS
T
X
I
F
O
U
T
P
U
T
O
F
F
T
X
F
A
U
L
T
L
E
D
T
X
F
A
U
L
T
R
E
L
A
Y
R
X
F
A
U
L
T
L
E
D
R
X
F
A
U
L
T
R
E
L
A
Y
C
O
M
E
Q
F
A
U
L
T
L
E
D
C
O
M
E
Q
F
A
U
L
T
R
E
L
A
Y
T
X
A
L
A
R
M
L
E
D
T
X
A
L
A
R
M
R
E
L
A
Y
#
2
R
X
A
L
A
R
M
L
E
D
R
X
A
L
A
R
M
R
E
L
A
Y
#
3
S
P
A
R
E
R
E
L
A
Y
A
L
A
R
M
#
1
T
X
A
I
S
R
X
A
I
S
(1) (2) (3) (4) (5)
TX DATA/AIS X X
TX CLK PLL X X X X
TX CLK ACTIVITY X X X
CONFIGURATION X X X X
RX INTERFACE FAULTS
BUFFER UNDERFLOW X X
BUFFER OVERFLOW X X
RX DATA/AIS X X
FRAME BER X X X
BACKWARD ALARM
BUFFER CLK PLL
X X X
BUFFER CLK ACT X X
DEMUX LOCK
RX 2047 LOCK
X X
BUFFER FULL X X
Legend
Test Note Fault/Alarm Relay Test Points Connector/Pins
1 TX FAULT Pin 4 (NO), 5 (COM), 6 (NC) ****
2 RX FAULT Pin 7 (NO), 8 (COM), 9 (NC) ****
3 COM EQ FAULT Pin 1 (NO), 2 (COM), 3 (NC) ****
4 TX ALARM #2 Pin 4 (NO), 5 (COM), 6 (NC) +
5 RX ALARM #3 Pin 7 (NO), 8 (COM), 9 (NC) +
**** A connection between the common and NC contacts indicate fault.
***** Signal is open collector high impedance if faulted.
+ A connection between the common and NO contacts indicate alarm.