User guide

March 2005 Glossary
Through Software Release 6.1
Page 416 of 425 Issue 1
Canopy System User Guide
Frame Spreading
Transmission of a beacon in only frames where the receiver expects a
beacon (rather than in every frame). This avoids interference from
transmissions that are not intended for the receiver.
Frame Timing Pulse
Gated Field
Toggle parameter that prevents or allows the module to continue to
propagate GPS sync timing when the module no longer receives the
timing.
Free Space Path Loss
Signal attenuation that is naturally caused by atmospheric conditions
and by the distance between the antenna and the receiver.
Fresnel Zone
Space in which no object should exist that can attenuate, diffract, or
reflect a transmitted signal before the signal reaches the target
receiver.
FSK
Frequency Shift Keying, a variation of frequency modulation to
transmit data, in which two or more frequencies are used.
FTP
File Transfer Protocol, defined in RFC 959. Utility that transfers of files
through TCP (Transport Control Protocol) between computing devices
that do not operate on the same platform. See
http://www.faqs.org/rfcs/rfc959.html
.
Global Positioning
System
Network of satellites that provides absolute time to networks on earth,
which use the time signal to synchronize transmission and reception
cycles (to avoid interference) and to provide reference for
troubleshooting activities.
GPS
Global Positioning System. A network of satellites that provides
absolute time to networks on earth, which use the time signal to
synchronize transmission and reception cycles (to avoid interference)
and to provide reference for troubleshooting activities.
GPS/3
Third-from-left LED in the module. In the operating mode for an
Access Point Module or Backhaul timing master, this LED is
continuously lit as the module receives sync pulse. In the operating
mode for a Subscriber Module or a Backhaul timing slave, this LED
flashes on and off to indicate that the module is not registered. In the
aiming mode for a Subscriber Module or a Backhaul timing slave, this
LED is part of a bar graph that indicates the quality of the RF link.
Graphical Internet
A Red Hat
®
Linux
®
9 operating system package group that enables the
Bandwidth and Authentication Manager (BAM) GUI.
GUI
Graphical user interface.
High-priority Channel
Channel that supports low-latency traffic (such as Voice over IP) over
low-latency traffic (such as standard web traffic and file downloads).
To recognize the latency tolerance of traffic, this channel reads the
IPv4 Type of Service Low Latency bit.