4RF Aprisa SR Plus Product Description - page 61
Product Architecture | 59
Aprisa SR+ Product Description
Adaptive Coding Modulation
The Aprisa SR+ provides Adaptive Coding Modulation (ACM) which maximizes the use of the RF path to
provide the highest radio capacity available.
ACM automatically adjusts the modulation coding and FEC code rate in the remote to base direction of
transmission over the defined modulation range based on the signal quality for each individual remote
radio.
When the RF path is healthy (no fading), modulation coding is increased and the FEC code rate is
decreased to maximize the data capacity.
If the RF path quality degrades, modulation coding is decreased and the FEC code rate is increased for
maximum robustness to maintain path connectivity.