Comtech EF Data SDM-650B Installation And Operation Manual page 16

Table of Contents
B.1.4.16 Bulk Consolidated Status Faults ................................................................................................ B-30
B.1.4.17 Change Status ............................................................................................................................ B-31
B.1.4.18 Equipment Type......................................................................................................................... B-32
B.2 Asynchronous Overhead Interface Support Option ............................................................................. B-33
B.2.1 General ................................................................................................................................................ B-33
B.2.2 Message Structure ............................................................................................................................... B-33
B.2.2.1 Start Character ............................................................................................................................. B-34
B.2.2.2 Device Address............................................................................................................................ B-34
B.2.2.3 Command/Response .................................................................................................................... B-35
B.2.2.4 End Character .............................................................................................................................. B-35
B.2.3 Modulator Configuration Commands ................................................................................................. B-36
B.2.3.1 Set Modulator Frequency............................................................................................................. B-36
B.2.3.2 Set RF Output .............................................................................................................................. B-36
B.2.3.3 Set Modulator Power Offset ........................................................................................................ B-36
B.2.3.4 Set Modulator Output Power Level ............................................................................................. B-37
B.2.3.5 Modulator Rate ............................................................................................................................ B-38
B.2.3.5.1 Modulator Filter Rate Assignment ....................................................................................... B-38
B.2.3.5.2 Select Modulator Rate .......................................................................................................... B-39
B.2.3.5.3 Select Modulator Rate Variable ........................................................................................... B-39
B.2.3.6 Scrambler Enable......................................................................................................................... B-39
B.2.3.7 Differential Encoder Enable ........................................................................................................ B-40
B.2.4 Demodulator Configuration Commands ............................................................................................. B-40
B.2.4.1 Set Demodulator Frequency ........................................................................................................ B-40
B.2.4.2 Demodulator Rate ........................................................................................................................ B-40
B.2.4.2.1 Demodulator Filter Rate Assignment ................................................................................... B-41
B.2.4.2.2 Select Demodulator Rate ...................................................................................................... B-41
B.2.4.2.3 Select Demodulator Rate Variable ....................................................................................... B-41
B.2.4.3 Descramble Enable ...................................................................................................................... B-42
B.2.4.4 RF Loopback ............................................................................................................................... B-42
B.2.4.5 IF Loopback................................................................................................................................. B-42
B.2.4.6 BER Threshold ............................................................................................................................ B-42
B.2.4.7 Sweep Reacquisition.................................................................................................................... B-43
B.2.4.8 Fast Acquisition Mode................................................................................................................. B-43
B.2.4.8.1 Sweep Center Frequency...................................................................................................... B-44
B.2.4.8.2 Sweep Width Range ............................................................................................................. B-44
B.2.4.8.3 Sweep Direction ................................................................................................................... B-45
B.2.5 Interface Configuration Commands .................................................................................................... B-45
B.2.5.1 Transmit Clock ............................................................................................................................ B-45
B.2.5.2 Buffer Clock ................................................................................................................................ B-45
B.2.5.3 Receive Clock .............................................................................................................................. B-46
B.2.5.4 External Reference Frequency..................................................................................................... B-46
B.2.5.5 Interface Loopback ...................................................................................................................... B-46
B.2.5.6 Baseband Loopback..................................................................................................................... B-46
B.2.5.7 Interface Coding Format Transmit............................................................................................... B-47
B.2.5.8 Interface Coding Format Receive ................................................................................................ B-47
B.2.5.9 Interface Buffer Center ................................................................................................................ B-47
B.2.5.10 Interface Buffer Size.................................................................................................................. B-47
B.2.5.11 Transmit Overhead Baud Rate................................................................................................... B-48
B.2.5.12 Receive Overhead Baud Rate .................................................................................................... B-48
B.2.5.13 Overhead Channels Character Length ....................................................................................... B-48
B.2.5.14 Overhead Channels Stop Bits .................................................................................................... B-48
B.2.5.15 Overhead Channels Parity ......................................................................................................... B-49
B.2.5.16 Interface Substitution Pattern (Transmit 2047 Pattern) ............................................................. B-49
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SDM-650B Satellite Modem
Rev. 5