User Manual

Glossary of terms
Term: Meaning:
c The speed of light.
dB decibel. A measure of power, based on a logarithmic scale.
Embedded System A computer without the normal display, keyboard, and disk
drives of a PC.
FPC
F
lexible Printed Circuit. The serial communication cable
on the RIM 801D is made using this type of flat multi-
conductor wiring.
Gain In this document, gain refers to increase/decrease in
radiated power.
LLI
L
ogical Link Identifier. Each DataTAC radio modem has
one unique LLI. An LLI is a 32-bit number. The network
operator will assign an LLI to each radio modem when they
authorize its use on their DataTAC network.
NCL
N
ative Control Language. The link layer protocol
exchanged via an asynchronous full-duplex serial channel
between a data terminal or computing device and the RIM
801D OEM Radio Modem.
MMCX The connector on the RIM 801D to which an antenna cable
is connected.
DataTAC A radio network and its communication protocols,
developed by Motorola.
SDU
S
ervice Data Unit. A parcel of data transferred between the
DataTAC network and the radio modem.
Network Operator The corporation or agency which installs, maintains and
authorizes use of a DataTAC network in a given area,
usually within one country.
Noise Refers to undesired, random interference combining with
the signal. If the device is not immune to noise, the
interference must be overcome with a stronger signal
strength. Noise can be produced by electronic components.
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