Glossary of Terms
9 - 2
Revision 1 - 07 July
1999
Event 4
TECHNICAL MANUAL
PSU
Power Supply Unit
The power supply converts incoming mains to
voltages usable by the electronics
PWM
Pulse Width
Modulation
A cyclic technique of digital power control where
a load is switched fully on for a period of time
dependant upon the required output power
RAM
Random Access
Memory
Memory in which the data contained within can
be accessed in any order. The term RAM
generally refers to memory that can be read and
written to by the system
ROM
Read Only
Memory
Memory that cannot be changed by the system
SMD
Surface Mount
Device
A miniaturised leadless component mounted on
the upper or lower surface of a circuit board
SRAM
Static RAM
A form of RAM that uses static memory cells to
store information.
