Glossaries | edulabs.org academy

Friday, 19 April 2024, 12:23 AM

Site: edulabs.org academy

Course: Activity Examples (Activity Examples)

Glossary: Electronics (Mike Jaroch)

REACTANCE-TUBE MODULATOR

An FM modulator that uses a reactance tube in parallel with the oscillator tank circuit [12].

RECEIVER

(1) The object that responds to the wave or disturbance. Same as DETECTOR [10]. (2) Equipment that converts electromagnetic energy into a visible or an audible form [17]. (3) In radar, a unit that converts RF echoes to video and/or audio signals [18].

RECEIVER SENSITIVITY

(1) The degree to which a receiver can usefully detect a weak signal. (2)
The lower limit of useful signal input to the receiver [18].

RECEIVER TRANSFER SWITCHBOARD

Equipment used to transfer receiver audio outputs to remote control station audio circuits [17].

RECEIVING ANTENNA

The device used to pick up the RF signal from space [10].

RECEIVING END

See OUTPUT END [10].

RECEPTION

The instant when an electromagnetic wave passes through a receiver antenna and induces a voltage in that antenna [17].

RECIPROCAL

(OF A QUANTITY)—The value obtained by dividing the number 1 by that quantity [1].

RECIPROCITY

The property of interchangeability of the same antenna for transmitting and receiving [10] [11].

RECOVERY TIME

In a radar, the time interval between the end of the transmitted pulse and the time when echo signals are no longer attenuated by the tr gap [18].