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SLM-3650 Satellite Modem
Maintenance
MODULATOR FAULTS
IF SYNTHESIZER
DATA CLOCK SYN
I CHANNEL
Q CHANNEL
AGC
MODEM REF ACT
MODEM REF PLL
MODULE
CONFIGURATION
DEMODULATOR FAULTS
CARRIER DETECT
IF SYNTHESIZER
I CHANNEL
Q CHANNEL
BER THRESHOLD
MODULE
CONFIGURATION
Note
1
2
3
4
5
6
7
8
*
**
***
****
*****
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Table 5-2. SLM-3650 Fault Tree
T
T
T
R
R
C
X
X
X
X
X
O
M
I
F
F
F
F
F
A
A
A
A
E
U
U
U
U
Q
O
L
L
L
L
U
T
T
T
T
F
T
A
P
L
R
L
R
U
U
E
E
E
E
L
T
D
L
D
L
T
A
A
O
Y
Y
L
F
E
F
D
(1)
(2)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Legend
Fault/Alarm Relay
TX FAULT
RX FAULT
COM EQ FAULT
TX ALARM #2
RX ALARM #3
PRIMARY ALARM
SECONDARY ALARM
DEF MAINT ALARM
IDR only.
IBS only.
D&I only.
A connection between the common and N.O. contacts indicate no fault/alarm.
Signal is open collector high impedance if faulted.
5–9
C
T
T
R
R
S
P
O
X
X
X
X
P
R
M
A
I
A
A
A
A
R
M
E
L
L
L
L
E
A
Q
A
A
A
A
R
R
R
R
R
R
Y
F
M
M
M
M
E
A
L
A
U
L
R
L
R
A
L
L
E
E
E
E
Y
A
T
D
L
D
L
R
A
A
A
M
R
Y
Y
L
E
A
R
L
#
#
R
E
A
2
3
M
L
Y
A
#
Y
1
(3)
(4)
(5)
(6)
**
***
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Test Points Connector/Pins
Pin 4 (NO), 5 (COM), 6 (NC) ****
Pin 7 (NO), 8 (COM), 9 (NC) ****
Pin 1 (NO), 2 (COM), 3 (NC) ****
Pin 4 (NO), 5 (COM), 6 (NC) ****
Pin 7 (NO), 8 (COM), 9 (NC) ****
Pin 43 (NO), 10 (COM), 27 (NC) ****
Pin 44 (NO), 11 (COM), 28 (NC) ****
Pin 17 *****
Revision 3
MN/SLM3650.IOM
S
I
D
T
R
D
E
B
E
X
X
&
C
S
F
I
O
E
A
A
N
B
R
I
I
T
D
A
R
S
S
E
A
C
E
R
R
K
D
R
Y
W
A
M
B
A
R
A
W
L
D
I
A
A
N
R
A
M
L
A
A
L
R
R
A
E
M
R
L
M
A
Y
(7)
(8)
**
**
*
*
*
***
***
***
**
**
***
***
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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