Fault Tree; Table 3-6. Demodulator Fault Tree - Comtech EF Data SDM-2020 Installation And Operation Manual

Operation
3.5

Fault Tree

Refer to Table 3-6 for fault tree description.
DEMODULATOR
Carrier Detect
IF Synthesizer
I Channel
Q Channel
BER Threshold
Module
Configuration
RX Interface:
Frame SYNC
Data Stable/AIS
Clock PLL
FIFO
Interface Module
Buffer Overflow
Buffer Underflow
Buffer Clock Activity
Buffer Full Warning
2047 Lock
CEQ:
Battery/Clock
-12 Volt Supply
+ 12 Volt Supply
+ 5 Volt Supply
Controller
LNB
Note: The following list shows the current available interfaces:
•
•
•
•
•
•
•
3–56

Table 3-6. Demodulator Fault Tree

FLT ALM
LED FLT RLY LED
ON ON
ON ON
ON ON
ON ON
ON
ON ON
ON ON
ON ON
ON
ON ON
ON
ON ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
RS422
LVDS
ASI/RS422
ASI/LVDS
ECL_HSSI
G.703
SMPTE 310M
ALM SYNC
RLY RX AIS LED
ON
ON
ON
ON
ON
ON
ON
ON OFF
ON OFF
ON
ON
ON
ON
ON
ON
ON
ON
SDM-2020 Satellite Demodulator
COM EQ
FLT INTERFACES
(see Note)
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
G.703
G.703
G.703
G.703
ON
ON
ON
ON
Rev. 3