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OM20 Universal Outdoor Modem
4.5
........................................................................................................................................... 4-8
4.6
4.7
4.7.1
TX Clock Options ................................................................................................................................ 4-12
4.7.1.1
SCTE: Serial Clock Transmit External ......................................................................................................... 4-13
4.7.1.2
SCT: Serial Clock Transmit ......................................................................................................................... 4-13
4.7.2
RX Buffer Clock Options ..................................................................................................................... 4-13
4.7.2.1
RX SAT Clock .............................................................................................................................................. 4-14
4.7.2.2
SCTE: Serial Clock Transmit External ......................................................................................................... 4-14
4.7.2.3
SCT: Serial Clock Transmit ......................................................................................................................... 4-14
4.7.2.4
EXT CLK/EXT BNC: ..................................................................................................................................... 4-14
4.7.2.5
EXT IDI: Insert Data In ............................................................................................................................... 4-14
4.7.3
EXT REF: External Reference, Optional............................................................................................... 4-15
4.8
4.8.1
G.703 Interface (Optional) ................................................................................................................. 4-15
4.8.2
Ethernet Data Interface J4 (Optional) ................................................................................................ 4-15
4.9
4.9.1
Reed-Solomon Operation in the OM20 .............................................................................................. 4-16
4.9.2
Reed-Solomon Code Rate ................................................................................................................... 4-16
4.9.3
Interleaving ........................................................................................................................................ 4-16
4.10
4.11
4.12
4.13
4.14
4.15
4.15.1
To Disable the ESC Backward Alarms ............................................................................................ 4-22
4.16
4.16.1
SCC Framing Structure ................................................................................................................... 4-22
4.16.2
Aggregate Data Rate ..................................................................................................................... 4-23
4.16.3
Overhead Rate Comparison ........................................................................................................... 4-24
4.16.4
Actual Overhead Rate Calculation ................................................................................................. 4-24
4.16.5
SCC Overhead Channel Setup ........................................................................................................ 4-25
4.17
4.18
4.19
............................................................................................................................................. 4-27
REAR PANEL INTERFACES .......................................................................................................... 5-1
5.1
5.1.1
Power Input .......................................................................................................................................... 5-3
5.1.1.1
AC Power Input (J1) ..................................................................................................................................... 5-3
5.1.1.2
DC Power Input/Switch (Optional) .............................................................................................................. 5-3
5.1.2
Remote/Terminal/Fault Port (J2) ......................................................................................................... 5-3
5.1.3
EIA-530 Synchronous Data, ES-ES Asynchronous Overhead Data, and G.703 Balanced Data I/O Port
(J3)
5-5
5.1.4
ETHERNET DATA/M&C (J4) .................................................................................................................. 5-6
5.1.5
Ground Lug (J6) .................................................................................................................................... 5-7
5.1.6
RX L-Band IF (J7) ................................................................................................................................... 5-7
5.1.7
TX L-Band IF (J8) ................................................................................................................................... 5-7
5.1.8
Compact Flash Card (J9) ....................................................................................................................... 5-7
5.1.9
SD (J10) (Optional) ............................................................................................................................... 5-8
5.1.10
RD (J11) (Optional) .......................................................................................................................... 5-8
& IF) .......................................................................................................... 4-8
..................................................................................................................................... 4-12
............................................................................................................................... 4-16
................................................................................................................................. 4-19
........................................................................................................... 4-20
............................................................................................................................. 4-21
(SCC) .............................................................................................................. 4-22
...................................................................................................... 5-1
) ............................................................................................. 4-15
) .................................................................... 4-18
............................................................................................ 4-27
........................................................................................... 4-27
iv
) ................................................. 4-18
Revision 5
MN-OM20
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