In
telecommunications, attack-time delay is the time needed for a
receiver or
transmitter to respond to an incoming signal.
For a receiver, the attack-time delay is defined as the
time interval from the instant a
step
Step(s) or STEP may refer to:
Common meanings
* Stairs#Step, Steps, making a staircase
* Walking
* Dance move
* Military step, or march
** Marching
Arts Films and television
* Steps (TV series), ''Steps'' (TV series), Hong Kong
* Step (film), ' ...
radio-frequency (RF)
signal, at a level equal to the receiver's threshold of
sensitivity
Sensitivity may refer to:
Science and technology Natural sciences
* Sensitivity (physiology), the ability of an organism or organ to respond to external stimuli
** Sensory processing sensitivity in humans
* Sensitivity and specificity, statisti ...
, is applied to the receiver input, to the instant when the receiver's output
amplitude reaches 90% of its
steady-state value.
[Federal Standard 1037C] If a
squelch circuit
In telecommunications, squelch is a circuit function that acts to suppress the audio (or video) output of a receiver in the absence of a strong input signal. Essentially, squelch is a specialized type of noise gate designed to suppress weak ...
is operating, the receiver attack-time delay includes the time for the receiver to break squelch.
For a transmitter, the attack-time delay is defined as the interval from the instant the transmitter is
keyed-on to the instant the transmitted RF signal amplitude has increased to a specified level, usually 90% of its key-on steady-state value.
[ The transmitter attack-time delay excludes the time required for automatic ]antenna
Antenna ( antennas or antennae) may refer to:
Science and engineering
* Antenna (radio), also known as an aerial, a transducer designed to transmit or receive electromagnetic (e.g., TV or radio) waves
* Antennae Galaxies, the name of two collid ...
tuning.
See also
*Transmit-after-receive time delay
In telecommunication, transmit-after-receive time delay is the time interval from removal of RF energy at the local receiver input until the local transmitter is automatically keyed on and the transmitted rf signal amplitude has increased to 90% of ...
*Receive-after-transmit time delay
In telecommunication, receive-after-transmit time delay is the time interval between (a) the instant of keying off the local transmitter to stop transmitting and (b) the instant the local receiver output has increased to 90% of its steady-state va ...
References
{{FS1037C MS188
Telecommunications engineering
Radio technology