Comtech EF Data SNM-1001 - Manual (Page 54)

SNM-1001 Network Control Modem Maintenance
Rev. 1 5–9
FAULT TREE
SNM-1001
1
1
1
1
TX INTF
BUFFER UNDERFLOW_
BUFFER OVERFLOW RX INTF FLTS
BUFFER CLOK ACT
FLT TX CLK ACTIVITY
INTERFACE FAULTS
1 1 1
1 1 1
IF SYNTHESIZER
DATA
I CHANNEL
I CHANNEL
Q CHANNEL
Q CHANNEL
CLOCK SYN
MOD FAULTS
AGC
MODULE
1
1 1 1
1 1
DEMOD FAULTS
IF SYNTHESIZER
1
1
1
1
1
1
BATTERY/CLOCK
-12V POWER SUPPLY
+12V POWER SUPPLY
COMMON EQUIPMENT FAULTS
1
1
1
1
1
1 1
1
1 1
1
+5V SUPPLY
CONTROLLER
INTERFACE MODULE
1
1
1
1
1
1
1 MODULE
BER THRESHOLD
DESCRAMBLER
MODULE
TX
F
A
U
LT L
E
D
T
X
IF
O
U
T
P
U
T
O
F
F
TX
F
A
U
LT R
E
L
A
Y
RX
F
A
UL
T
RE
LA
Y
CO
M
E
Q
F
A
UL
T
LE
D
RX
F
A
UL
T
LE
D
CO
M
E
Q
F
A
UL
T
RE
L
A
Y
T
X
AL
AR
M L
E
D
RX
A
L
A
R
M
LE
D
T
X
IF
O
U
T
P
U
T
O
F
F
TX
F
A
U
LT L
E
D
TX
F
A
U
LT R
E
L
A
Y
RX
F
A
UL
T
LE
D
RX
F
A
UL
T
RE
LA
Y
CO
M
E
Q
F
A
UL
T
LE
D
CO
M
E
Q
F
A
UL
T
RE
L
A
Y
T
X
AL
AR
M L
E
D
RX
A
L
A
R
M
F
A
U
LT
L
E
D
Figure 5-5. SNM-1001 Fault Tree (Continuous Mode)