Murata Electronics North America BT2022M Manual Do Utilizador

Glossary 

Refer to the following list of terms that may be unfamiliar to you. These terms are used 
throughout this document.  
 

ARQ 

Automatic Repeat Request. The operation in which the radio 
will re-send the data until it is received correctly. 

bps 

Bits-per-second. A measure of information transfer rate of 
digital data across a channel. 

Decibel 

A measure of the ratio between two signal levels. Used to 
express either loss or gain. 

dBi 

Decibels referenced to an ideal isotropic radiator in free space. 
Used to express antenna gain. 

dBm 

Decibels referenced to 1 milliwatt. An absolute unit used to 
measure signal power. Transmitter power output or received 
signal strength. 

DCE 

Data Communications Equipment. A device that receives data 
in the form of digital signals at its input. The modem side of a 
computer-to-modem connection. 

DCD 

Data Carrier Detect. 

DTE 

Data Terminal Equipment. A device that provides data in the 
form of digital signals at its output. The computer side of a 
computer-to-modem connection. 

EIRP 

Effective Isotropic Radiated Power.  

ISM 

Industrial, Scientific, or Medical band operating at 2.4 GHz. 
Allows use of a radio without a license, but the equipment must 
be immune to interference from other users in the band and 
approved for use in the intended country. 

Latency 

The delay between when data is received on TX until it is 
output on RX. 

RMA 

Return Material Authorization. 

RTU 

Remote Terminal Unit.  A device used in data collection. 

TDMA 

Time Division Multi Access. A time slot multiplexing protocol 
for multinode networking. 

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