If the temperature is below setpoint, the output will be on longer; if the temperature is too high, the output will be off longer. The third controller type provides proportional with integral and derivative control, or PID.
Noise figure. Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (SNR), caused by components in a radio-frequency (RF) signal chain. It is a number by which the performance of an amplifier or a radio receiver can be specified, with lower values indicating better performance.
This report explains how noise is measured, distinguishes annoying sound levels from those that can lead to hearing loss, identifies what sources of noise are currently regulated by the federal government, indicates which federal agencies are responsible for setting and enforcing noise standards, describes the extent to which the standards limit noise, explains the role of state and local governments, and discusses relevant legislative activity in the 106 th Congress.