Telecommunications terms starting with P

636 terms

  1. Pulse Repetition Frequency (PRF) The amount of time between successive pulses, or bursts, of electromagnetic energy that is transmitted by a radar.
  2. pulse repetition rate The number of pulses per unit time.
  3. pulse rise time See rise time.
  4. pulse string Synonym pulse train.
  5. pulse stuffing See bit stuffing.
  6. pulse train A series of pulses having similar characteristics. Synonym pulse string.
  7. Pulse Width Same as Pulse Length; the linear distance in range occupied by an individual pulse from a radar.
  8. pulse-address multiple access (PAMA) The ability of a communication satellite to receive signals from several Earth terminals simultaneously and to amplify, translate, and relay the signals…
  9. pulse-amplitude modulation (PAM) Modulation in which the amplitude of individual, regularly spaced pulses in a pulse train is varied in accordance with some characteristic of the…
  10. pulse-code modulation (PCM) Modulation in which a signal is sampled, and the magnitude (with respect to a fixed reference) of each sample is quantized and digitized for transmission…
  11. pulse-duration modulation (PDM) Modulation in which the duration of pulses is varied in accordance with some characteristic of the modulating signal.
  12. pulse-frequency modulation (PFM) Modulation in which the pulse repetition rate is varied in accordance with some characteristic of the modulating signal.
  13. pulse-interval modulation See pulse-position modulation.
  14. pulse-length modulation Deprecated synonym for pulse-duration modulation.
  15. pulse-position modulation (PPM) Modulation in which the temporal positions of the pulses are varied in accordance with some characteristic of the modulating signal.
  16. pulse-repetition-rate modulation Synonym pulse-frequency modulation.
  17. pulse-time modulation (PTM) The general class of pulse-code modulation in which the time of occurrence of some characteristic of the pulsed carrier is varied with respect to some…
  18. pulse-width modulation (PWM) Deprecated synonym for pulse-duration modulation.
  19. pulsed FM systems A spread spectrum system in which the RF carrier is modulated with a fixed period and fixed duty cycle sequence.
  20. pulsing In telephony, the transmission of address information to a switching office by means of pulses, i.e., signals, that originate from the subscriber, i.e.
  21. pump frequency The frequency of an oscillator used to provide sustaining power to a device, such as a laser or parametric amplifier, that requires rf or optical power.
  22. Pumping Mechanical transfer of fluids.
  23. pure binary numeration system See binary notation.
  24. Purge To remove information that has no further value from a file, usually according to a records retention schedule
  25. purging Rendering stored information unrecoverable by laboratory attack. [INFOSEC-99]
  26. Push Refers to the player and the dealer having the same total. Usually the player's bet is returned when there is a push.
  27. push-down file See last-in first-out.
  28. push-to-talk (PTT) operation In telephone or two-way radio systems, that method of communication over a speech circuit in which the talker is required to keep a switch operated while…
  29. push-to-type operation In telegraph or data transmission systems, that method of communication in which the operator at a station must keep a switch operated in order to send…
  30. pushbutton dialing Dialing in which (a) pushbuttons or keys are used to actuate and connect audible tone oscillators to a line, (b) each button or key corresponds to a…
  31. PVC Permanent virtual circuit. A network connection with a static route defined in advance, usually by manual setup.
  32. pW Precipitable Water - measure of the depth of liquid water at the surface that would result after precipitating all of the water vapor in a vertical column…
  33. PWM Abbreviation for pulse-width modulation, which is a deprecated synonym for pulse-duration modulation.
  34. PWP Abbreviation for permanent wilting point.
  35. pWp0 Abbreviation for picowatts, psophometrically weighted, measured at a zero-dBm transmission level point. See dBm(psoph), psophometer.
  36. pX Abbreviation for peak envelope power (of a radio transmitter).