Newtec MDM9000 - Page 175

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Feature Descriptions
MDM9000 Satellite Modem
Multicarrier:
Occupied bandwidth = Symbol Rate*(1 + roll-off factor).
Example for Occupied bandwidth 3 MHz.
• 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 40 MHz 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