User Manual

Version 3.03 SPEEDLAN 9000 Series Installation and Operation User Guide
Glossary-18
Symbol Threshold
After a signal has been acquired, the acquisition algorithm in the spread-spectrum chip continues to run a
cross-correlation between the expected PN sequence and the received signal, but now uses the Symbol
Threshold for comparison. If the result of the cross-correlation drops below the Symbol Threshold, the signal
is considered to have been lost, and the algorithm begins trying to acquire the signal again.
System Gain
The sum of the transmitter power output and the receiver sensitivity. System gain is an important measure of a
system’s ability to overcome attenuation and perform to a satisfactory level. These are measured in decibels
per meter (dBm).
Tx (Transceiver)
This is where the packet is coming from.
WAN
A wide-area metropolitan network is a connection between LANs, which may be privately owned or rented.
Wired
A network interface connected by wire to other nodes in the network.
Wireless
A network interface that uses radio to communicate to other nodes in the network.