Raytheon R20 User Manual

Raytheon
Model R20
Raster Scan Radar System
OPERATION REFERENCE GUIDE
1 . To turn set on press CS'fEiY.D~F .
To transmit press i XMIT/OFF ..
To turn off press l)TBY.
1
Q£.( and f~_[T OFF together.
2. To change:
: Ranges; Press~·GE-and A. or 'Y key.
: Gain Level; Press
GAIN and A. or 'Y key.
:
Sea Clutter; Pres; SEA-CL and A or 'Y key.
: Rain
Clutter; PressRA1"N-CL and A. or 'Y key.
: Tune Level;
Press-fUNi[ and A. or 'Y key.
Brilliance:
VRM:
EBL:
Hold key depressed for desired brilliance level.
Hold VRM- key depressed for reversed _\[RM symbol. Use A or 'Y key
to set VRM distance. Press VRM key to turn off.
Hold EBL key depressd for rev.ersed EAL symbol. Use A. or 'Y key to
set bearing line on target. Press EB_L key to turn off.
Target Alarm: Hold.ALM key depressed for reversed ~LM symbol. Use A. or 'Y key to
set alarm range. Press_ALM._ key to turn off.
Select Mode: Press'SELECT key until desired symbol appears onscreen (F. I, E. H. L.
or T). Whe;desired symbol appears. p'ress S_ET to turn function HONH or
"OFFH.
SHM:
Press 5-HM to momentarily remove the ships heading line from display
on the CRT.

Raytheon R20 Specifications

General

Peak Power	3 kW
Rotation Rate	24 rpm
Type	Marine Radar
Range	20 nautical miles
Display	7-inch CRT

Summary

Raytheon Radar Controls Overview

POWER Control

Controls power to the radar system, allowing OFF, STBY, or XMIT modes.

RANGE Control

Adjusts the operating range scale of the radar display.

TUNE Control

Adjusts the receiver for maximum target reception.

GAIN Control

Controls the setting of the receiver gain.

SEA CLUTTER Control

Minimizes sea clutter by reducing nearby gain.

RAIN CLUTTER Control

Reduces effects of rain or snow on the display.

VRM Control

Controls VRM for accurate distance measurements.

EBL Control

Controls EBL for accurate bearing measurements.

ALM (Alarm) Control

Enables and sets the target guard zone.

BRIL (Brilliance) Control

Adjusts the intensity of the screen.

SHM Control

Temporarily turns SHM OFF while depressed.

SELECT Control

Selects one of six available functions.

SECTION 3 OPERATION

OPERATING CONTROLS

Explains the function of various radar controls for optimal performance.

Layout of Controls

Shows the physical arrangement of controls on the radar unit.

Typical Operation Procedure

Provides a step-by-step guide for typical radar operation.

Range and Bearing Measurement

Details methods for measuring target range and bearing using the radar.

Using the Controls

Explains how to effectively use various radar controls.

Navigation With the Radar

Describes how to use the radar for navigational purposes.

False Echoes

Identifies and explains common causes of false echoes on the radar display.

SECTION 4 MAINTENANCE

USER PREVENTIVE MAINTENANCE

Provides guidelines for routine user maintenance to ensure optimal operation.

SCANNER UNIT

Details maintenance procedures specific to the scanner unit.

DISPLAY UNIT

Outlines maintenance and cleaning procedures for the display unit.

SECTION 5 ADJUSTMENT AND FAULT FINDING

ADJUSTMENT

Procedures for adjusting components for optimum performance or after replacement.

TROUBLE-SHOOTING

Guides for identifying and resolving common radar system faults.

REPLACEMENT OF MAJOR COMPONENTS

Instructions for replacing key components within the radar system.