Glossary
AFC
automatic frequency control. See also, DAFC (page 468).
AGC
Automatic Gain Control. The gain of the linear channel video signals is adjusted based
on an estimate of the next signal level. For example using the average power of the
last few pulses at that range.
antenna gain
The measurement of an antenna's ability to amplify the incoming microwave signals in
a particular direction.
Antenna Utility
IRIS utility for manually controlling and monitoring the radar and antenna.
API
application programming interface
Ascope Utility
A diagnostic and test utility used for aligning and testing the radar and signal
processor.
azimuth
A direction in terms of the 360° compass. North at 0°, east at 90°, south at 180°, and
west at 270°.
BITEX
Built-in test equipment software provided by IRIS.
burst channel
Channel used for storing a sample of the transmitted microwave pulse.
CAN-BUS controller area network
Multicast shared serial bus standard, robust in noisy environments.
clutter
Unwanted echoes on a radar screen. Microwaves reflected from, for example, ground,
buildings, sea, insects, or birds.
co-polar
The transmitted and received signals have the same polarization.
coherency
Capability of a system to keep a stable phase reference from pulse to pulse.
COHO
coherent local oscillator
cross-polar
The transmitted and received signals have orthogonal polarizations.
CSR
clutter-to-signal ratio
Glossary
467
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