4RF Aprisa SR+ User Manual - page 109
Managing the Radio | 107
Aprisa SR+ User Manual 1.5.3
ACM Control
This parameter enables / disables Adaptive Code Modulation for the remote to base direction of
transmission (upstream).
When ACM is enabled (ACM Control set to Standard or Fast), the base station sends a modulation type
recommendation to each remote radio based on the signal quality for each individual remote radio.
Option
Function
Disabled
Disables Adaptive Code Modulation for the upstream.
The base station does not send a modulation type recommendation
to any remote radio.
Fast
Enables Adaptive Code Modulation for the upstream.
The ACM will switch down one ACM level if an errored packet is
received.
The ACM will switch up when the link quality exceeds the
performance threshold.
This option maintains the highest network speeds for as long as
possible.
Standard
Enables Adaptive Code Modulation for the upstream.
The ACM will switch down one ACM level if the link quality
degrades in advance of the level where errored packets would be
expected and will switch to the lowest ACM level if an errored
packet is received.
The ACM will switch up when the link quality exceeds the
performance threshold.
This option preserves packet integrity but reduces network speeds.
The default setting is Fast.