Cambium Networks PTP 820 Series User Manual page 149

Chapter 2: Getting Started
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Fixed ACM mode applies constant TX and RX rates. However, unlike regular scripts, with a Fixed ACM
script you can specify a maximum profile to inhibit inefficient transmission levels.
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In Adaptive ACM mode, TX and RX rates are dynamic. An ACM-enabled radio system automatically
chooses which profile to use according to the channel fading conditions. If you select Adaptive, two fields
are displayed enabling you to select minimum and maximum ACM profiles.
Figure 46 MRMC Symmetrical Scripts Page (Configuration – Adaptive Mode) – PTP 820F
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Configuring the Radio (MRMC) Script(s)