Comtech-ef-data OM20 User Manual download pdf (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

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Comtech-ef-data OM20 User Manual Page 211

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