Comtech EF Data OM20 - Manual (Page 211)

OM20 Universal Outdoor Modem Appendix G
MN-OM20– Revision 5 G–7
Case 2: IBS 1.544 Mbps, 3/4 Rate Viterbi
Starting with the Data Rate – 512 Kbps
Modulator:
Method 1 -
Under Interface Menu:
Set Interface type
Set Tx clock selection
Set Framing to 1/15
Set mode to IBS
Under Mod Data Menu:
Set code rate to 3/4 VIT
Set data rate for 1544000
Under Mod IF Menu: Set desired Tx frequency and power level
Turn IF ON
Method 2 -
Under Interface Menu:
Set Interface type
Set Tx clock selection
Set Mod strap code to: 120
Under Mod IF Menu: Set desired Tx frequency and power level
Turn IF on
Demodulator:
Method 1 -
Under Interface Menu:
Set Interface type
Set Buff clock selection
Set Buffer Size
Set Framing to 1/15:
Set mode to IBS:
Under Demod IF Menu: Set desired Rx frequency
Under Demod Data Menu:
Set code rate to 3/4 VIT
Set data rate for 1544000
Under Interface Menu:
Set Interface type
Set Buff clock selection
Set Buffer Size
Method 2 -
Under Interface Menu:
Set Interface type
Set Buff clock selection
Set Buffer Size
Set Demod strap code to: 120
Under Demod IF Menu: Set desired Rx frequency