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SDM-9000 Satellite Modem
COMMON EQUIPMENT
FAULTS
BATTERY/CLOCK
-12V POWER SUPPLY
+12V POWER SUPPLY
+5V SUPPLY
-5V SUPPLY
CONTROLLER
INTERFACE MODULE
BACKWARD ALARMS
(IDR ONLY)
BW ALARM RX #4
BW ALARM RX #3
BW ALARM RX #2
BW ALARM RX #1
BW ALARM TX #4
BW ALARM TX #3
BW ALARM TX #2
BW ALARM TX #1
Test Note
1
2
3
4
5
6
*
A connection between the common and N.O. contacts indicate no fault/alarm.
**
Signal is open collector high impedance if faulted.
Rev. 4
Table 6-4. SDM-9000 Modem Fault Tree (Continued)
T
T
X
X
I
F
F
A
U
O
L
U
T
T
P
L
U
E
T
D
O
F
F
Fault/Alarm Relay
TX FAULT
RX FAULT
COM EQ FAULT
TX ALARM #2
RX ALARM #3
DEF MAINT ALARM
T
R
R
C
C
T
X
X
X
O
O
X
M
M
F
F
F
A
A
A
A
E
E
L
U
U
U
Q
Q
A
L
L
L
R
T
T
T
F
F
M
A
A
R
L
R
U
U
L
E
E
E
L
L
E
L
D
L
T
T
D
A
A
Y
Y
L
R
E
E
D
L
A
Y
(1)
(2)
(3)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Legend
Test Points Connector/Pins
J7/Pin 4 (N.O.), 5 (COM), 6 (N.C.) *
J7/Pin 7 (N.O.), 8 (COM), 9 (N.C.) *
J7/Pin 1 (N.O.), 2 (COM), 3 (N.C.) *
J10/Pin 4 (N.O.), 5 (COM), 6 (N.C.) *
J10/Pin 7 (N.O.), 8 (COM), 9 (N.C.) *
J8/Pin 17 **
Maintenance
T
R
R
D
T
R
X
X
X
E
X
X
F
A
A
A
E
A
A
L
L
L
R
I
I
A
A
A
R
S
S
R
R
R
E
M
M
M
D
R
L
R
M
E
E
E
A
L
D
L
I
A
A
N
Y
Y
A
#
#
L
2
3
A
R
M
(4)
(5)
(6)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
6–17
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