Adaptivity using DAA (Detect and Avoid)

This page describes the Adaptivity module, which allows CC23xx or CC27xx devices to more efficiently meet regulatory requirements tied to some specific world regions. This module is enabled through SysConfig as shown in the below figure.

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Figure 144. Enabling adaptivity

Once the module is enabled, the Adaptivity configuration panel should appear in SysConfig.

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Figure 145. Default settings.

Let us now discuss the different configuration parameters, starting with the 2 different modes.

Utilization Based Mode

Selects the level of control for transmit (TX) usage on BLE channels. When channel utilization exceeds a defined threshold, then the Adaptivity will be enabled.

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Figure 146. Utilization based mode

Note that the duty cycle for transmit is limited to 10%.

Fixed Mode

In fixed mode, adaptivity is always enabled whenever the TX power is above 10 dBm.

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Figure 147. Fixed mode

External Gain Power

The total transmit (TX) power (Pout) gain in dBm. Set to 0 if not used.

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Figure 148. External gain power set to 0 dBm

This should include gain from any external PA as well as any antenna gain. This will relax the detection threshold level (TL) according to the formula:

TL = -70 dBm/MHz + 10 × log10 (100 mW / Pout)

where TL is the detection threshold and Pout is the equivalent omni-directional radiated power in mW.