Automatic Level Control
The SRS-4 uses an Automatic Level Control (ALC) loop to adjust the transmit gain to achieve the target output power (set through the tx.pout
property).
The ALC can be configured to two different modes, set through the tx.alc.mode
property. The default mode is full ALC (mode 1).
- Mode 0:
Open-loop ALC. The system uses the target output power to calculate the gain from the gain lookup table, but does not adjust the gain based on the achieved output power.
- Mode 1:
Full ALC. The gain is increased from a minimum output power, and is subsequently adjusted based on the achieved output power.
The measured output power of the last transmitted frame is always available in the tx.pwr.fwd
property.