Newtec EL170 User Manual page 122

Features
9.1.1.3 How Does FlexACM work
FlexACM can be implemented on any satellite link using modulator and
demodulator functions. The following devices can be used:
• Modems;
• Modulator (standalone);
• Demodulator (standalone);
• EL860 CCM/VCM/ACM Shaper and Encapsulator.
Point to Point Flex ACM Configuration
Figure 74 – Point-to-Point FlexACM Configuration
To be able to keep the optimal ModCod at all time there must be feedback from
the demodulator to the modulator telling the modulator if another ModCod should
be chosen and what that ModCod should be.
Following applications are handling the FlexACM feature:
• The ACM client at demodulator side;
• The ACM controller at the modulator side.
Feedback from the ACM client (Demodulator) to the ACM Controller
(Modulator)
The ACM client embedded in the demodulator determines the optimal ModCod
based on the real-time detected link quality. It has following inputs at its disposal
for its calculations:
version 4.2
121
User Manual for EL170/970/470 IP Satellite Modulator/
SHAPING THE FUTURE OF SATELLITE COMMUNICATIONS
Demodulator/Modem