SDM-309B Satellite Modem
Maintenance
MN/U-SDM309B Rev. #
6-6–17
FRM_BER
Frame Bit Error Rate.
The receive decoded error rate has exceeded 10E-3 over a 60 second
period, measured on the framing bits. This is defined as a major (prompt)
receive alarm by Intelsat Specification IESS-308. In a redundant system a
switchover will be attempted. Since some data must be correctly received
to indicate this fault, receive AIS will not be substituted. This fault is to be
sent as a backward alarm to the distant end. This must be wired externally
as faults other than from the modem may need to enter the fault tree.
BW_ALARM
Backward Alarm Fault.
Modem is receiving a backward alarm indicating trouble at the distant end
which may be a result of improper transmission at the near end of the link.
This particular alarm is reported and recorded but the modem takes no
other action. In most cases however, this fault is due to some receive
problem with the modem so a "real" fault will probably be occurring if
backward alarm faults are being recorded.
Insert
(D&I Only) Insert Interface Hardware Fault.
The typical cause of this fault is the insert phase locked loop is not locked
or some other insert interface hardware has malfunctioned. Return the
Drop and insert channel unit to the factory for repair.
Ins_Clk
(D&I Only) Insert Clock Fault.
This fault occurs when no data is present on the Terrestrial side of the
interface usually caused by the wrong clock selection such as the insert
clock source is selected as “External” and no external clock is present.
Check the selected clock source and verify the clock is present. If the fault
is modem related, other faults will also occur. If the Satellite clock is
selected a demod fault, “Data Clk_Syn” fault will probably occur. If the
Insert clock is selected a mod fault, “TX_Clk_Syn” fault will probably occur.
RX_PLL
(IBS/M1200P Only) Indicates a loss of lock on the reference of the
interface receive clock recovery oscillator. Return the interface card for
repair.
BUFF_CLK
Loss of activity on the selected buffer clock source. The modem will
fallback to the satellite clock.
MUX_LOCK
Demultiplexer Synchronization Lock Fault This fault means that the
demultiplexer is unable to maintain valid frame and multiframe alignment.
The usual cause is invalid or absent receive data. This is a major (prompt)
alarm. It will cause insertion of receive Alarm Indication Signal (all ones)
and switchover will be attempted. This fault is to be sent as a backward
alarm to the distant end. This fault will occur when no carrier is present,
but will probably never occur with a correct signal.
Table 6-2
Programmable Data Rates For The EFData
Variable Rate SDM-309B Modem
64.0
64.5
65.0
65.5
66.0
66.5
67.0
67.5
68.0
68.5
69.0
69.5
70.0
70.5
71.0
71.5
72.0
72.5
73.0
73.5
74.0
74.5
75.0
75.5
76.0
76.5
77.0
77.5
78.0
78.5
79.0
79.5
80.0
80.5
81.0
81.5
82.0
82.5
83.0
83.5
84.0
84.5
85.0
85.5
86.0
86.5
87.0
87.5
88.0
88.5
89.0
89.5
90.0
90.5
91.0
91.5
92.0
92.5
93.0
93.5
94.0
94.5
95.0
95.5
96.0
96.5
97.0
97.5
98.0
98.5
99.0
99.5
100.0
100.5
101.0
101.5
102.0
102.5
103.0
103.5
104.0
104.5
105.0
105.5
106.0
106.5
107.0
107.5
108.0
108.5
109.0
109.5
110.0
110.5
111.0
111.5
112.0
112.5
113.0
113.5
114.0
114.5
115.0
115.5
116.0
116.5
117.0
117.5
118.0
118.5
119.0
119.5
120.0
120.5
121.0
121.5
122.0
122.5
123.0
123.5
124.0
124.5
125.0
125.5
126.0
126.5
127.0
127.5
128.0
128.5
129.0
129.5
130.0
130.5
131.0
131.5
132.0
132.5
133.0
133.5
134.0
134.5
135.0
135.5
136.0
136.5
137.0
137.5
138.0
138.5
139.0
139.5
140.0
140.5
141.0
141.5
142.0
142.5
143.0
143.5
144.0
Summary of Contents for SDM-309B
Page 7: ...Preface SDM 309B Satellite Modem iv Rev 0 This page is intentionally blank ...
Page 13: ...Table of Contents SDM 309B Satellite Modem x Rev 0 This page is intentionally blank ...
Page 16: ...SDM 309B Satellite Modem Introduction MN U SDM309B Rev 1 1 3 Figure 1 1 SDM 309B Modem ...
Page 18: ...SDM 309B Satellite Modem Introduction MN U SDM309B Rev 1 1 5 Figure 1 3 Modular Construction ...
Page 25: ...Introduction SDM 309B Satellite Modem 1 1 12 MN U SDM309B Rev ...
Page 28: ...SDM 309B Satellite Modem Installation MN U SDM309B Rev 2 2 3 Figure 2 1 Rear Panel View ...
Page 34: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 3 Figure 3 1 Front Panel View ...
Page 47: ...Operation SDM 309B Satellite Modem 3 16 MN U SDM309B Rev Figure 3 2 Menu Tree ...
Page 48: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 17 Figure 3 3 Menu Tree ...
Page 49: ...Operation SDM 309B Satellite Modem 3 18 MN U SDM309B Rev Figure 3 4 Menu Tree ...
Page 50: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 19 Figure 3 5 Menu Tree ...
Page 51: ...Operation SDM 309B Satellite Modem 3 20 MN U SDM309B Rev Figure 3 6 Menu Tree ...
Page 52: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 21 Figure 3 7 Menu Tree ...
Page 53: ...Operation SDM 309B Satellite Modem 3 22 MN U SDM309B Rev Figure 3 8 IF Loopback ...
Page 54: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 23 Figure 3 9 RF Loopback ...
Page 55: ...Operation SDM 309B Satellite Modem 3 24 MN U SDM309B Rev Figure 3 10 Interface Loopback ...
Page 56: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 25 Figure 3 11 Baseband Loopback ...
Page 71: ...Operation SDM 309B Satellite Modem 3 40 MN U SDM309B Rev Figure 3 12 Menu Tree ...
Page 72: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 41 Figure 3 13 Menu Tree ...
Page 73: ...Operation SDM 309B Satellite Modem 3 42 MN U SDM309B Rev Figure 3 14 Menu Tree ...
Page 74: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 43 Figure 3 15 Menu Tree ...
Page 75: ...Operation SDM 309B Satellite Modem 3 44 MN U SDM309B Rev Figure 3 16 Menu Tree ...
Page 76: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 45 Figure 3 17 Menu Tree ...
Page 77: ...Operation SDM 309B Satellite Modem 3 46 MN U SDM309B Rev ...
Page 88: ...SDM 309B Satellite Modem M C and Interfaces MN U SDM309B Rev 4 4 11 Figure 4 4 IBS Fault Tree ...
Page 89: ...M C and Interfaces SDM 309B Satellite Modem 4 4 12 MN U SDM309B Rev Figure 4 5 Jumper Table ...
Page 127: ...SDM 309B Satellite Modem Theory of Operation MN U SDM309B Rev 5 5 3 Figure 5 1 Modulator Card ...
Page 151: ...Maintenance SDM 309B Satellite Modem 6 6 6 MN U SDM309B Rev Figure 6 3 Typical Eye Patterns ...
Page 177: ...SDM 309B Satellite Modem Data Rates and Filters MN U SDM309B Rev A 9 ...
Page 235: ...External Channel Unit SDM 309B Satellite Modem C C 28 MN U SDM309B Rev Figure C 13 Menu Tree ...
Page 236: ...SDM 309B Satellite Modem External Channel Unit MN U SDM309B Rev C C 29 Figure C 14 Menu Tree ...
Page 237: ...External Channel Unit SDM 309B Satellite Modem C C 30 MN U SDM309B Rev Figure C 15 Menu Tree ...
Page 238: ...SDM 309B Satellite Modem External Channel Unit MN U SDM309B Rev C C 31 ...
