Comtech EF Data SDM-300A, Инструкция по установке и эксплуатации

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Maintenance SDM-300A Satellite Modem
5–10 Rev. 4
Table 5-2. SDM-300A Fault Tree (Continued)
T
X
I
F
OUT
P
U
T
OF
F
TX
F
A
U
L
T L
E
D
TX
F
A
U
L
T R
E
L
A
Y
RX F
A
UL
T
L
E
D
RX F
A
UL
T
RE
L
A
Y
COM E
Q
F
A
UL
T
L
E
D
COM E
Q
F
A
UL
T
RE
L
A
Y
T
X
AL
AR
M
L
E
D
T
X
AL
AR
M
R
E
L
A
Y
#
2
R
X
AL
AR
M
L
E
D
R
X
AL
AR
M
R
E
L
A
Y
#
3
S
P
A
RE
RE
L
A
Y A
L
A
R
M #
1
P
R
IM
AR
Y
AL
AR
M
R
E
L
A
Y
S
E
CONDA
RY A
L
A
R
M
RE
L
A
Y
IB
S
B
A
CK
WA
RD A
L
A
R
M
DE
F
F
E
RE
D M
A
IN
A
L
A
R
M
TX
A
IS
RX A
IS
D&
I T
E
RR B
W
A
TX INTERFACE FAULTS
(1
)
(2
)
(3
)
(4
)
(5
)
(6
) *****
(7
) *****
***** (8
) *
****** *** *** ***
TX DROP X X X X X
TX DATA/AIS X X X X
TX CLK PLL X X X X X
TX CLK ACTIVITY X X X X X
TX AUDIO 1 CLIP X X
TX AUDIO 2 CLIP X X
RX INTERFACE FAULTS
BUFFER UNDERFLOW X X
BUFFER OVERFLOW X X
RX DATA/AIS X X X X
FRAME BER X X X X X
BACKWARD ALARM X X X X
BUFFER CLK PLL X X X X
BUFFER CLK ACT X X X
DEMUX LOCK X X X X X
RX 2047 LOCK X X
BUFFER FULL X X
RX INSERT X X X X
RX AUDIO 1 CLIP X X X
RX AUDIO 2 CLIP X 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) ****
(6) PRIMARY ALARM Pin 43 (NO), 10 (COM), 27 (NC) ****
(7) SECONDARY ALARM Pin 44 (NO), 11 (COM), 28 (NC) ****
(8) DEF MAINT ALARM Pin 17 *****
* 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.