Meaning
Signal precision adjustments ensure that radio frequency emitters deliver exact voltage levels consistently across the entire bandwidth of a module. Executing an rf power calibration involves comparing the live output of a transmitter against a stabilized thermal power meter. This match confirms that the output conforms to regulatory limits and satisfies the link budget needs of the target network.
Path Flattening
Wireless chips often exhibit different gain levels at higher and lower ends of their frequency range. Within the rf power calibration the firmware loads a lookup table containing correction factors for every operating channel. This adjustment prevents the signal from being too weak at the margins or too strong and distorted.
Efficiency Target
Power consumption stays low when the transmitter is not overshooting its necessary amplitude. Correct rf power calibration extends the battery life of portable units by optimizing the current draw for a specific output target. It also minimizes interference caused to adjacent users on the same frequency band.
Verification Scan
Measurement of harmonic content and signal purity happens once the primary level is set. The documentation of rf power calibration includes data for worst case scenarios like low temperature or high input voltage. Valid profiles are locked before the device leaves the factory.
