In a multichannel transmission system, a drop and insert is a process that diverts (drops) a portion of the multiplexed aggregate signal at an intermediate point, and introduces (inserts) a different signal for subsequent transmission in the same position, e.g., time slot or frequency band, previously occupied by the diverted signal.
The diverted signal may be demodulated or reinserted into another transmission system in the same or another time slot or frequency band.
The time slot or frequency band vacated by the diverted signal need not necessarily be reoccupied by another signal. Likewise, a previously unoccupied time slot or frequency band may be occupied by a signal inserted at the drop-and-insert point.
Signals not of interest at the drop-and-insert point are not diverted.
Famous quotes containing the words drop and/or insert:
“Over Sir John’s hill,
The hawk on fire hangs still;
In a hoisted cloud, at drop of dusk, he pulls to his claws
And gallows, up the rays of his eyes the small birds of the bay....”
—Dylan Thomas (1914–1953)
“In the felt of the morning the calico minded,
sufficiently starched, insert papers, hit keys,
efficient and sure as their adding machines;
yet they weep in the vault,”
—Patricia K. Page (b. 1916)