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DMD50 Universal Satellite Modem
E.3.3 Case 3: Closed Network, 3/4 Rate Viterbi, IBS Overhead
Starting with the Data Rate = 512 Kbps
Modulator:
Method 1 -
Under Interface Menu:
Set mode to IDR:
Under Mod IF Menu:
Method 2 -
Set Mod strap code to: 101
Demodulator:
Method 1 -
Under Interface Menu:
Set mode to: Closed Net
Under Demod data Menu:
Method 2 -
Set Demod strap code to: 101
MN-DMD50 Revision 4
Set Interface type
Set Tx clock selection
Under Mod Data Menu:
Set code rate to 3/4 VIT
Set desired Tx frequency and power level
Under Interface Menu:
Under Mod IF Menu:
Turn IF on
Set Buffer Size
Under Demod IF Menu: Set desired Rx frequency
Set code rate to 3/4 VIT
Under Interface Menu:
Set Interface type
Under Demod IF Menu: Set desired Rx frequency
Set Framing for 1/15
Turn IF ON
Set Interface type
Set Tx clock selection
Set desired Tx frequency and power level
Set Interface type
Set Buff clock selection
Set Framing for 1/15
Set Buff clock selection
Set Buffer Size
Strap Codes
E–8
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