User guide

Glossary Canopy System User Guide
606
pmp-0229 (Mar 2013)
Fade Margin
The difference between strength of the received signal and the
strength that the receiver requires for maintaining a reliable link. A
higher fade margin is characteristic of a more reliable link. Standard
operating margin.
FCC
Federal Communications Commission of the U.S.A.
Feature Activation Key
Software key file whose file name includes the ESN of the target
module. When installed on the module, this file activates the module to
have the feature enabled or disabled in a separate operator action.
Field-programmable
Gate Array
Array of logic, relational data, and wiring data that is factory
programmed and can be reprogrammed.
File Transfer Protocol
Utility that transfers of files through TCP (Transport Control Protocol)
between computing devices that do not operate on the same platform.
Defined in RFC 959. See http://www.faqs.org/rfcs/rfc959.html
.
FPGA
Field-programmable Gate Array. An array of logic, relational data, and
wiring data that is factory programmed and can be reprogrammed.
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.