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P
Pager A device designed to transmit a signal to the owner of a vehicle in order to alert them when the alarm has been triggered.2
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Pain Generator(s) A name given to a type of siren that is specifically designed to produce a sound of the proper volume and pitch so as to cause physical pain to a thief's ears.2
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Panic The name given to the feature of a security system that provides the ability for the operator to cause the system's siren to sound at will. The panic feature is typically initiated either by pressing a button or buttons on the remote control transmitteror by keypad command or by push-button or toggle switch.2
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Parallel Wiring A circuit in which two or more devices are connected to the same source of voltage, sharing a common positive and negative point, so that each device receives the full applied voltage.2
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Parametric EQ An equalizer with adjustable frequency, level and "Q"1
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Passive Arming The ability of some security systems to arm without requiring any direct action from the operator of the vehicle. Passive arming is usually accomplished when the operator exits the vehicle in the normal fashion (Also see Last Door Arming).2
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Passive Component In a crossover system, a non-powered component used to separate an audio signal into a specified frequency band before it goes to a particular amplifier or driver. A passive device usually presents some loss (expressed in decibels) to a system.4
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Passive Repeater Antenna A non-permanently installed, glass-mount antenna that is without physical connection to the cellular telephone.2
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Peak An emphasis over a frequency range not greater than one octave.2
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Peak Input Power The amount of power a voice coil can withstand for short periods of time.2
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PEI Film Polyetherimide. A plastic-based polymer used primarily for tweeters and midrange cones offering high resistance against harsh environmental extremes, superior rigidity, damping and resistance against harsh environmental conditions.1
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Period The amount of time required for a single cycle of a sound wave.2
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Permalloy Tape Head A cassette tape head constructed of permalloy, an alloy made primarily of nickel and iron, used for its superior high resistance and permeability, offering superior frequency response at a low cost.1
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Phase The timing of a sound wave that is measured in degrees from 0 to 360.2
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Phase Shift Frequency interaction in the crossover region of passive crossovers which can cause some frequencies to be delayed with respect to other frequencies.2
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Piezo The name usually given to piezo electric drivers. This type of driver has no voice coil or magnetic assembly. Instead, piezo electric material expands and contracts when voltage is applied. The material vibrates and either radiates sound directly, or drives a diaphragm. They can only be used effectively on high frequencies.2
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Piezo Sensors A type of shock or impact sensor that utilizes the properties of the piezo electric effect inherent in some materials. A Piezo Sensor typically uses a piezo electric element to sense impacts or vibrations applied to the vehicle.2
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Pinswitch A simple spring-loaded mechanical switch used in many different vehicles designed to turn on interior lights when doors are opened. Pinswitches are also used in the installation of most security systems in the hood or trunk/hatch as a means of triggering the system should these points be opened.2
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Point of Entry The term normally used to describe the doors, hood, trunk/hatch, windows, sunroof or any other point through which a thief can gain entry into a vehicle.2
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Polarity In electricity, refers to the condition of being either positive or negative.2
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Polarity Reversal A DPDT switch connected between a pair of DC input terminals so that the polarity of a pair of output terminals can be reversed or switched.2
--------------
Polycarbonate A polymer based plastic material offering superior resistance against resonance.1
---------------
Polypropylene A plastic based material used primarily for speaker cones due to its rigidity, damping and resistance against harsh environmental conditions.1
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Port Diameter The measurement across the port opening. Measured as internal diameter (not outer diameter .4
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Port Length The measurement of the length of the port.4
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Positive LCD A liquid crystal display employing a lit backfield with dark elements. This results in a primarily colored display.1
----------------
Positive Lead The lead or line connected to the positive terminal of a current, voltage, or power source.2
---------------
Positive Verification System (PVS) Part of the MTSO in cellular systems that tries to insure that any invalid mobile numbers will not be allowed to make calls.2
--------------
Potentiometer A variable resistor made with either carbon or wire wound material which attenuates a signal.2
---------------
Power The amount of energy (in joules) that a device delivers or consumes divided by the time (in seconds) that the device is operating.2
---------------
Power Door Locks The feature where the door locking and unlocking of the vehicle is performed by some mechanical means other than human power. Power door locks may be electric, vacuum, electro/vacuum, or a combination of both.2
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Power Line Noise A varying AC ripple that is found riding on a DC voltage. It is recognized by a whining that varies with engine speed.2
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Power Supply See DC/DC Converter.4
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Power Windows The feature where the opening and closing of the vehicle's windows is performed by some mechanical means other than human power. Power windows are typically operated by electric motors.2
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Pre-Amp A circuit unit which takes a small signal and amplifies it sufficiently to be fed into the power amplifier for further amplification. A pre-amp includes all of the controls for regulating tone, volume, and channel balance.2
--------
Preamp Output Typically found on headunits, a preamp output provides low level, high quality audio signal for use with external amplifiers.1
-----------
Preset A collection of system settings stored in a memory that is virtually instantly recallable, typically at the touch of a button.1
-----------
Primary The input side of a transformer.4
-----------
Programming Adapter A device used for programming cellular telephones that allows the telephone to be programmed only when the device is attached.2
------------
Program Bank A Custom File feature that allows the user to flag the tracks on a disc, indicating whether they should be played or skipped.1
-----------
Program Play A Custom File feature that allows the user to define a sequence of 12 tracks, in a specific order, for customized playback. Up to two banks of 12 track sequences can be recalled, for up to 24 tracks total.1
-------------
Proximity Sensor A common term for a spatial type sensor that can be either the radar, ultrasonic, or infrared type (Also see Spatial Sensor).2
----------
PSTN In cellular, refers to the Public Switch Telephone Network. (Sometimes called PTSN, Public Telephone Switched Network).2
-----------
Pulsed Output An output of a security system, usually used to flash parking lights or honk horns, that is pulsed or turned on and off by the security system.2
Pager A device designed to transmit a signal to the owner of a vehicle in order to alert them when the alarm has been triggered.2
-------
Pain Generator(s) A name given to a type of siren that is specifically designed to produce a sound of the proper volume and pitch so as to cause physical pain to a thief's ears.2
---------
Panic The name given to the feature of a security system that provides the ability for the operator to cause the system's siren to sound at will. The panic feature is typically initiated either by pressing a button or buttons on the remote control transmitteror by keypad command or by push-button or toggle switch.2
---------
Parallel Wiring A circuit in which two or more devices are connected to the same source of voltage, sharing a common positive and negative point, so that each device receives the full applied voltage.2
----------
Parametric EQ An equalizer with adjustable frequency, level and "Q"1
-----------
Passive Arming The ability of some security systems to arm without requiring any direct action from the operator of the vehicle. Passive arming is usually accomplished when the operator exits the vehicle in the normal fashion (Also see Last Door Arming).2
-----------
Passive Component In a crossover system, a non-powered component used to separate an audio signal into a specified frequency band before it goes to a particular amplifier or driver. A passive device usually presents some loss (expressed in decibels) to a system.4
----------
Passive Repeater Antenna A non-permanently installed, glass-mount antenna that is without physical connection to the cellular telephone.2
----------
Peak An emphasis over a frequency range not greater than one octave.2
----------
Peak Input Power The amount of power a voice coil can withstand for short periods of time.2
-----------
PEI Film Polyetherimide. A plastic-based polymer used primarily for tweeters and midrange cones offering high resistance against harsh environmental extremes, superior rigidity, damping and resistance against harsh environmental conditions.1
------------
Period The amount of time required for a single cycle of a sound wave.2
------------
Permalloy Tape Head A cassette tape head constructed of permalloy, an alloy made primarily of nickel and iron, used for its superior high resistance and permeability, offering superior frequency response at a low cost.1
-------------
Phase The timing of a sound wave that is measured in degrees from 0 to 360.2
-------------
Phase Shift Frequency interaction in the crossover region of passive crossovers which can cause some frequencies to be delayed with respect to other frequencies.2
--------------
Piezo The name usually given to piezo electric drivers. This type of driver has no voice coil or magnetic assembly. Instead, piezo electric material expands and contracts when voltage is applied. The material vibrates and either radiates sound directly, or drives a diaphragm. They can only be used effectively on high frequencies.2
-------------
Piezo Sensors A type of shock or impact sensor that utilizes the properties of the piezo electric effect inherent in some materials. A Piezo Sensor typically uses a piezo electric element to sense impacts or vibrations applied to the vehicle.2
---------------
Pinswitch A simple spring-loaded mechanical switch used in many different vehicles designed to turn on interior lights when doors are opened. Pinswitches are also used in the installation of most security systems in the hood or trunk/hatch as a means of triggering the system should these points be opened.2
--------------
Point of Entry The term normally used to describe the doors, hood, trunk/hatch, windows, sunroof or any other point through which a thief can gain entry into a vehicle.2
--------------
Polarity In electricity, refers to the condition of being either positive or negative.2
--------------
Polarity Reversal A DPDT switch connected between a pair of DC input terminals so that the polarity of a pair of output terminals can be reversed or switched.2
--------------
Polycarbonate A polymer based plastic material offering superior resistance against resonance.1
---------------
Polypropylene A plastic based material used primarily for speaker cones due to its rigidity, damping and resistance against harsh environmental conditions.1
---------------
Port Diameter The measurement across the port opening. Measured as internal diameter (not outer diameter .4
---------------
Port Length The measurement of the length of the port.4
---------------
Positive LCD A liquid crystal display employing a lit backfield with dark elements. This results in a primarily colored display.1
----------------
Positive Lead The lead or line connected to the positive terminal of a current, voltage, or power source.2
---------------
Positive Verification System (PVS) Part of the MTSO in cellular systems that tries to insure that any invalid mobile numbers will not be allowed to make calls.2
--------------
Potentiometer A variable resistor made with either carbon or wire wound material which attenuates a signal.2
---------------
Power The amount of energy (in joules) that a device delivers or consumes divided by the time (in seconds) that the device is operating.2
---------------
Power Door Locks The feature where the door locking and unlocking of the vehicle is performed by some mechanical means other than human power. Power door locks may be electric, vacuum, electro/vacuum, or a combination of both.2
------------
Power Line Noise A varying AC ripple that is found riding on a DC voltage. It is recognized by a whining that varies with engine speed.2
----------
Power Supply See DC/DC Converter.4
---------
Power Windows The feature where the opening and closing of the vehicle's windows is performed by some mechanical means other than human power. Power windows are typically operated by electric motors.2
------------
Pre-Amp A circuit unit which takes a small signal and amplifies it sufficiently to be fed into the power amplifier for further amplification. A pre-amp includes all of the controls for regulating tone, volume, and channel balance.2
--------
Preamp Output Typically found on headunits, a preamp output provides low level, high quality audio signal for use with external amplifiers.1
-----------
Preset A collection of system settings stored in a memory that is virtually instantly recallable, typically at the touch of a button.1
-----------
Primary The input side of a transformer.4
-----------
Programming Adapter A device used for programming cellular telephones that allows the telephone to be programmed only when the device is attached.2
------------
Program Bank A Custom File feature that allows the user to flag the tracks on a disc, indicating whether they should be played or skipped.1
-----------
Program Play A Custom File feature that allows the user to define a sequence of 12 tracks, in a specific order, for customized playback. Up to two banks of 12 track sequences can be recalled, for up to 24 tracks total.1
-------------
Proximity Sensor A common term for a spatial type sensor that can be either the radar, ultrasonic, or infrared type (Also see Spatial Sensor).2
----------
PSTN In cellular, refers to the Public Switch Telephone Network. (Sometimes called PTSN, Public Telephone Switched Network).2
-----------
Pulsed Output An output of a security system, usually used to flash parking lights or honk horns, that is pulsed or turned on and off by the security system.2