Comtech EF Data OM20 - Manual (Page 64)

OM20 Universal Outdoor Modem OM20 Theory of Operation
MN-OM20– Revision 5 4–26
i. ES BAUD RATE {150 - 115200}
ii. This allows the user to select the baud rate of the ASYNC port (J17) in SCC
Mode.
7. Under TX ASYNC MODE Menu, set the desired ES BITS/CHAR:
i. ES BITS/CHAR {7,8}
ii. This allows the user to choose between 7 or 8 bits of data.
8. Repeat Steps 4 through 7 under the RX ASYNC MODE (menu)
9. The physical connection to the overhead channel will be the DB-9 Female Port labeled ASYNC
(J17).
SCC Overhead Chart Examples
(Viterbi 3/4 w/V.35 Scrambler)
Modem Data Rate
Kbps
SCC Control
Channel Rate
In-Band Overhead
Rate Setting
Symbol Rate
9.6 1/1 300 6800
9.6 1/2 300 6700
9.6 1/3 300 6667
9.6 1/4 300 6650
9.6 1/5 300 6641
9.6 1/6 300 6634
9.6 1/7 300 6629
9.6 1/1 9600 19200
9.6 1/2 9600 17067
9.6 1/3 9600 15543
9.6 1/4 9600 14400
9.6 1/5 9600 14400
9.6 1/6 9600 14400
9.6 1/7 9600 14400
512 1/1 9600 354165
512 1/2 9600 350948
512 1/3 9600 349867
512 1/4 9600 349346
512 1/5 9600 349201
512 1/6 9600 348802
512 1/7 9600 348658