User's Manual

74 TWACS
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-ORION
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for UMT Products User Guide
Glossary
firmware
Programming code that is stored on a microchip within an electronic assembly that can not be
changed by the user and is accessible only with special equipment.
frequency shift keying
A data transmission control method that modulates, i.e. “shifts” between two radio
frequencies.
hand held transceiver (HHTR)
A control device used to set up, link, and establish communication between the EMTR and
RMTR components of the TWACS RF system.
IED
See Intelligent End Device.
industrial, science, and medical (ISM)
An unlicensed radio frequency band.
Intelligent End Device (IED)
A device incorporating one or more processors with the capability to recieve data from an
external source or to send data to an external source.
ISM
See Industrial, Science, and Medical.
MDM
See Meter Data Management System.
Meter Data Management System (MDM)
A system that manages meter reading data. Meter readings can be saved as needed for billing
and hisotrical analysis. The MDM would minimally manage configuration information for
meters and maintain measurement histories.
nonvolatile memory
A physical data storage area that maintains its content when the power is turned off.
pulser
An electronic or magnetic device that generates electric pulses in a quantity that is
proportional to the physical variable under measurement and which the pulses represent.
RCE
See Remote Communication Equipment.
DRAFT