Information   Sheets
P-R
Term	Explanation
Peak	The maximum instantaneous value of a varying current or voltage.
Phase	An angular relationship between waves.
Pin-Diode	A device used to convert optical signals to electrical signals in
	a receiver.
PNP	A type of transistor which requires a negative power supply.
Proximity Sensor	A pilot device that detects the present of an object without
	physical contact.
Pulse	Used to describe one particular variation in a series of wave motions.
Rectification	This is a term used to describe an electrical process which
	converts AC to DC.
Repeater	A transmitter and receiver combination used to regenerate a signal.
RFI	Radio Frequency Interference.
RG/U	Abbreviation for Radio Government Universal. The military
	designation for coaxial cable.
RMS	Root Mean Square, the effective value of an alternating current
	or voltage.
Rupture	In the breaking strength tests, the point at which the material
	physically comes apart.