Radar Field Analyser - RFA641 Edition Date: 28-Feb-18
GLOSSARY OF TERMS
ACP Azimuth Change Pulse
ADS-B Automatic Dependent Surveillance, Broadcast
ARP Azimuth Reference Pulse
ATC Air Traffic Control
CW Continuous wave
dB Decibel
DME Distance Measuring Equipment
Downlink The signal path from aircraft to ground
DSTC Digital Sensitivity Time Control
FRUIT False Replies Unsynchronized In Time, unwanted SSR replies
received by an interrogator which have been triggered by other
interrogators
HPD Horizontal Polar Diagram
IE Intersoft Electronics
IF Intermediate Frequency
LVA Large Vertical Aperture (antenna)
Monopulse Radar-receiving processing technique used to provide a precise
bearing measurement
MSSR Monopulse Secondary Surveillance Radar
NM Nautical Mile, unit of distance
OTD Out of Tolerance Data
PPI Plan Position Indicator
PRF Pulse Repetition Frequency
PSR Primary Surveillance Radar
Radar Radio Detection And Ranging
Radome Radio-transparent window used to protect an antenna principally
against the effects of weather
RASS-S Radar Analysis Support Systems – Site measurements
RCS Radar Cross Section
RF Radio Frequency
RX Receiver
SLS Side Lobe Suppression, a technique to avoid eliciting transponder
replies in response to interrogations transmitted via antenna
sidelobes
SLB Side Lobe Blanking
SNR Signal-to-Noise ratio
Squitter Random reply by a transponder not triggered by an interrogation
SSR Secondary Surveillance Radar
STC Sensitivity Time Control
TACAN Tactical Air Navigation
TCAS Traffic Collision Avoidance System
Transponder Airborne unit of the SSR system, detects an interrogator’s
transmission and responds with a coded reply stating either the
aircraft’s identity or its flight level
TX Transmitter
Uplink Ground-to-air signal path
VPD Vertical Polar Diagram
YIG filter Yttrium-Iron-Garnet filter
IE-UM-00165-005 RFA641 User Manual.odt 12/110
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