GE MDS SD Series Technical Manual page 95

MDS 05-4846A01, Rev. D
RSPSupply - 1-888-532-2706 - www.RSPSupply.com
http://www.RSPSupply.com/p-8461-MDS-UP-SD9-MS2ES-Upgrade-Key-SD9-MS-to-SD9-ES.aspx
Intrusive Diagnostics—A mode of remote diagnostics that queries and
commands radios in a network with an impact on the delivery of the
system "payload" data. See Active messaging.
LAN—Local Area Network
LED—Light Emitting Diode
Latency—The delay (usually expressed in milliseconds) between when
data is applied to TXD (Pin 2) at one radio, until it appears at RXD
(Pin 3) at the other radio.
Listen Before Transmit—A collision avoidance mechanism that
attempts to allow transmission only when the channel is clear.
mA—Milliamperes (current flow)
MAC—Media Access Control
MAS—Multiple Address System. A radio system where a central
master unit communicates with several remote stations for the purpose
of gathering telemetry data.
Master (Station)—Radio which is connected to the host computer. It is
the point at which polling enters the network.
Multiple Address System—See MAS.
Network-Wide Diagnostics—An advanced method of controlling and
interrogating GE MDS radios in a radio network.
Node—An operating mode of the transceiver with respect to diag-
nostic/management activities. See also GATE, PEER, and ROOT.
Non-intrusive diagnostics—See Passive messaging.
OTA—Over-the-Air
PA—Power Amplifier
Packet Radio—A transmission scheme in which data elements are
assembled into units, that are consecutively numbered and
error-checked at the time of transmittal. Errored packets result in retry
requests from the receiving station.
Passive messaging—This is a mode of diagnostic gathering or repro-
gramming that does not interrupt payload system polling communica-
tions. Diagnostic/reprogramming data is sent/collected non-intrusively
over a period of time; polling messages are carried with payload system
data (contrast with active messaging).
SD Series Technical Manual 87