Comtech EF Data OM20 - Manual (Page 210)

OM20 Universal Outdoor Modem Appendix G
MN-OM20– Revision 5 G–6
Case 1: IDR 8.448 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 mode to IDR
Under Mod Data Menu:
Set code rate to 3/4 VIT
Set data rate for 8448000
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: 128
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 mode to IDR
Under Demod IF Menu: Set desired Rx frequency
Under Demod data Menu:
Set code rate to 3/4 VIT
Set data rate for 8448000
Method 2 -
Under Interface Menu:
Set Interface type
Set Buff clock selection
Set Buffer Size
Set Demod strap code to 128
Under Demod IF Menu, set desired Rx frequency