AUTOHELM ST50 PLUS Operation And Installation Manual page 7

6
ST50 PLUS RADAR Operation and lnstalfation
Section 3. Operation .....................................................
3.1 Introduction ...........................................................
3.2 Radar Map .............................................................
3.2.1 Map Operation ...............................................
3.2.2 Effect of Ship's Movement .............................. .3-3
3.2.3 Navigational Echoes ....................................... ,3-3
3.2.4 Sea Return ....................................................
3.2.5 Storm and Rain Squall Returns ........................ .3-4
3.2.6 Blind Sector or Shadow Effect ........................ .34
3.2.7 Side Lobes ....................................................
3.2.8 Rader Interference ......................................... .3-6
3.2.9 False Echoes .................................................
3.2.10 Determining Radar Line-of-Sight Range .......... .3-8
3.3 Operating Controls .................................................
3.3.1 Layout of the Controls ..................................... 3-9
3.3.2 Functions of the Controls ................................ .3-9
Handbook
Radar Glossary
Radar Glossary
3-1
3-1
3-2
.3-5
.3-9
The following is a list of abbreviations and acronyms which may be
used in the text of the manual.
Analog to Digital Conversion
ALM IN - Alarm In, also known as the "approach" alarm.
For targets approaching a set alarm zone.
ALM OUT - Alarm Out, also known as the exit alarm.
For targets exiting or leaving a set alarm zone.
CPU Central Processing Unit
Digital to Analog Conversion
DEL Delete
Display
EBL Electronic Bearing Line
EXP Expansion
FET Field Effect Transistor
FTC Fast Time Constant, also known as Anti-Clutter Rain
I R Interference Rejection
KM Kilometer
LCD Liquid Crystal Display
LL Latitude/Longitude
M H Modulator High Voltage
M N Modulator High Voltage Return
NM Nautical Mile
PCB Printed Circuit Board
PPI Plan Position Indicator
Parallel to Serial Conversion
P-S
Pulse Width (Length)
Pulse Width (Length) Selection
RR Range Rings (Fixed)
S H M Ship's Heading Marker
ST-BY Standby
STC Sensitivity Time Constant, also known as
Anti-Clutter Sea
TB Terminal Board
TD Time Difference
T I Trigger
V D Video
VRM Variable Range Marker
WPT
X-MIT Transmit