(1 dB GCP, Gain Compression Point, P1dB) - The maximum output power of an amplifier at which amplification is nearly linear (high power levels result in compression). As input power applied to an amplifier is increased, some point will be reached where a 10 dB increase in input signal results in only 9 dB of output signal increase - this is the 1 dB gain compression point. Other compression points such as 0.1 dB or 2 dB are sometimes specified.