Radyne OM20 Installation And Operation Manual page 7

OM20 Universal Outdoor Modem
Section 4 - OM20 Initial Configuration ..................................................................................... 4-1
4.0 OM20 Hardware ............................................................................................................... 4-1
4.0.1 OM20 L-Band Printed Circuit Card ............................................................................... 4-2
4.0.2 OM20 Baseband Processing Printed Circuit Card........................................................ 4-3
4.1 OM20 Functional Block Diagram ..................................................................................... 4-4
4.1.1 Baseband Processing ................................................................................................... 4-4
4.1.2 Tx Baseband Processing .............................................................................................. 4-5
4.1.3 Rx Baseband Processing .............................................................................................. 4-5
4.2 Monitor & Control (M&C) Subsystem ............................................................................... 4-6
4.2.1 Terminal Port................................................................................................................. 4-7
4.2.2 Modem Remote Communications (RLLP) .................................................................... 4-7
4.2.3 Ethernet M&C Port ........................................................................................................ 4-7
4.2.4 Modem Monitor Status .................................................................................................. 4-7
4.3 Async Port / ES-ES Communications .............................................................................. 4-8
4.4 Internal Clock ................................................................................................................... 4-8
4.5 Loopback Features (Terrestrial & IF) ............................................................................... 4-8
4.6 Clocking Options ............................................................................................................ 4-12
4.6.1 TX Clock Options ........................................................................................................ 4-12
4.6.1.1 SCTE: Serial Clock Transmit External ..................................................................... 4-13
4.6.1.2 SCT: Serial Clock Transmit...................................................................................... 4-13
4.6.2 RX Buffer Clock Options ............................................................................................. 4-13
4.6.2.1 RX SAT Clock .......................................................................................................... 4-14
4.6.2.2 SCTE: Serial Clock Transmit External ..................................................................... 4-14
4.6.2.3 SCT: Serial Clock Transmit...................................................................................... 4-14
4.6.2.4 EXT CLK/EXT BNC:................................................................................................. 4-14
4.6.2.5 EXT IDI: Insert Data In ............................................................................................. 4-14
4.6.3 EXT REF: External Reference, Optional..................................................................... 4-14
4.7 RS422/V.35 Interface J3 (Standard option) ................................................................... 4-15
4.7.1 G.703 Interface (Optional)........................................................................................... 4-15
4.7.2 Ethernet Data Interface J4 (Optional) ......................................................................... 4-15
4.8 Reed-Solomon Codec .................................................................................................... 4-15
4.8.1 Reed-Solomon Operation in the OM20....................................................................... 4-15
4.8.2 Reed-Solomon Code Rate .......................................................................................... 4-16
4.8.3 Interleaving .................................................................................................................. 4-16
4.9 Drop and Insert (D&I) ..................................................................................................... 4-17
4.10 OM20 Automatic Uplink Power Control (AUPC Operation) ......................................... 4-17
4.11 Asynchronous Overhead Operation J3 (Framing/Multiplexer Capability).................... 4-17
TM116 - Rev. 1.2
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