User's Manual

GLOSSARY
2003 IPMobileNet, Inc. 39 IPSeries MR User Manual / Rev. A / 04-September-03
Data Scrambling A technique used to ensure no repeating patterns exist in the
transmitted data stream, a method of ensuring the data is
reasonable random in nature.
Digital A classification of signal in which the amplitude of the signal
may take a discrete number of values.
Diversity Reception A reception system using multiple antennas and/or multiple
receivers to combat multi-path fading.
Dynamic Range The range of amplitudes over which a receiver or amplifier
will operate within specifications.
EIA Electronic Industries Association
EMI Electromagnetic Interference
Ethernet A local area network (LAN) architecture, which uses a bus or
star topology and supports data transfer rates of 10 Mbps.
Exciter An exciter is that part of a radio, which creates the transmit
RF carrier and performs the process of modulation.
FEC Forward Error Correction – A methodology used to correct
errors, which may occur in wireless transmission systems.
With FEC, additional data is added to each message prior to
transmission, at the receiving end, this additional information
can be used to correct errors in the received message.
FM Frequency Modulation – A form of modulation where the
carrier is shifted an amount proportional to the modulating
signal’s amplitude at a rate proportional to the modulating
signal’s frequency.
Frequency Stability A measure of the stability of a frequency with respect to
temperature, usually expressed in ppm (parts per million)
over a specified temperature range.
FSK Frequency Shift Keying – Digital modulation (a form of FM)
where the carrier frequency is shifted above and below the
operating frequency (in discrete steps) in response to a
digital data input.
Full Duplex A dual frequency mode of operation in which transmission
and reception occur simultaneously.