Newtec MDM6000 - Page 190

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Feature Descriptions MDM6000 Satellite Modem
Multi carrier per Transponder:
Occupied bandwidth = Symbol Rate*(1+Roll-Off factor).
Example for Occupied bandwidth 3MHz.
• DVB-S (35%) 2.2 Mbaud
• DVB-S2 (25%) 2.4 Mbaud
• DVB-S2 (20%) 2.5 Mbaud
• DVB-S2 (15%) 2.6 Mbaud
• DVB-S2 (10%) 2.7 Mbaud
• DVB-S2 (5%) 2.8 Mbaud
Single Carrier per Transponder:
Two limits are possible:
• Limit1:
Symbol Rate = Transponder Separation / (1+Roll-Off Factor)
The minimum roll-off factor that may be selected with this formula is 10%.
• Limit2:
Symbol Rate =User Bandwidth / (1+Roll-Off Factor)
For example:
A 36 MHz transponder with 40MHz Separation.
Roll-Off
Factor (%)
Limit 1:
Transponder Separation based
Limit 2:
User Bandwidth based
35 29.6 Mbaud 26,7 Mbaud
25 32 Mbaud 28,8 Mbaud
20 33.3 Mbaud 30,0 Mbaud
15 34.8 Mbaud 31,1 Mbaud
10 36.4 Mbaud 32,7 Mbaud
5 36.4 Mbaud 34,3 Mbaud