Of an optical emitter, the spectral line having the greatest power. Synonym peak wavelength.

The average power supplied to the antenna transmission line by a transmitter during one radio frequency cycle at the crest of the modulation envelope taken under normal operating conditions. [NTIA] [RR]

A process by which the absolute instantaneous value of a signal parameter is prevented from exceeding a specified value.

The output power averaged over that cycle of an electromagnetic wave having the maximum peak value that can occur during transmission.

1. In a transmission path, the maximum instantaneous signal power, voltage, or current at any point.
2. At a given point in a transmission path, the maximum instantaneous signal power, voltage, or current that occurs during a specified period.

See peak emission wavelength.

1. Synonym peak emission wavelength.
2. Of an optical bandpass filter, the wavelength that suffers the lowest loss. [After FAA]

The ratio of the instantaneous peak value, i.e., maximum magnitude, of a signal parameter to its time-averaged value.
Note: The peak-to-average ratio can be determined for many signal parameters, such as voltage, current, power, frequency, and phase.

The absolute value of the difference between the maximum and the minimum magnitudes of a varying quantity.

1. Black level expressed as an offset in voltage or IRE units relative to blanking level. Conventionally, approximately 54 mV (
7. 5 IRE) in system M as defined by ANSI/EIA/TIA 250-C; conventionally zero in all other systems. [After SMPTE]
2. See blanking level.