User manual JRC RADAR 1500 MKII

[. . . ] This product will provide many years of trouble free use when operated properly, so it is important that you read and observe the precautions below. Read this manual thoroughly to gain a good understanding of the capabilities and the requirements of this equipment. Store the manual in a safe location so, that it does not become lost or damaged. Observe standard storage and handling procedures for electronic equipment. [. . . ] Press the STBY/OFF key, the radar returns to stand-by mode to reduce battery drain. Press the X-MIT/OFF key again, the radar reverts to full transmitting function. These sequences are also guided by on-screen prompts. 90 SEC 0000HOURS VX. X PUSH XMIT TO OPERATE FIG. 4-2 TURNING THE RADAR ON/OFF OPERATION 23 INTERFERENCE REJECTION "ON" TARGET EXPANDER "ON" RANGE RING INTERVAL (NM) RANGE SCALE (NM) OWN SHIP COURSE DATA OWN SHIP SPEED DATA SELECTING J-DIAL LEVEL INDICATOR TUNE INDICATOR NAVIGATION DATA TRAIL "ON" GUARD ZONE ALARM "ON" POSITION DATA FIG. 4-3 LAYOUT OF THE SCREEN 24 OPERATION 4. 3 SELECTING A RANGE Press the J-DIAL until RANGE is highlighted in the upper right corner of the display. The range scale and range rings setting in use is shown in the upper left corner. Rotate the J-DIAL clockwise to increase the range and anti-clockwise to decrease it. The range rings are automatically set to correspond with this selection. 4. 4 ADJUSTING RECEIVER SENSITIVITY Press the J-DIAL until GAIN appears highlighted in the upper right corner of the display. Rotate the J-DIAL clockwise or counterclockwise, to vary the gain and thus control the strength of echo returns on the radar screen. The proper setting is when the background noise is just visible on the screen. a light speckled effect) 4. 5 ADJUSTING TUNING Press the J-DIAL until the TUNE appears highlighted at the upper right corner of the display. Rotate the J-DIAL clockwise or counterclockwise, to maximize the target echo. big ship or land) within range, select SEA CLUTTER and turn the control to maximum. Use these echoes from wave crests to adjust the tuning bar for fullest attainable deflection. When the radar has warmed up, it may be necessary to make a further fine tune adjustment. In this mode, the radar automatically tunes itself for best efficiency at all ranges. (refer to 4. 24) OPERATION 25 4. 6 REDUCING SEA CLUTTER CAUTION Increasing the SEA CLUTTER control effectively diminishes the radar's sensitivity. SEA CLUTTER should never be advanced to the point where it obliterates all returns from waves, since this setting could prevent the detection of nearby targets, especially small wood/grp boats and yachts approaching head-on. The SEA CLUTTER control is normally only used on the shorter ranges to suppress the effect of sea clutter formed by breaking wave crests which the radar "sees" as solid objects. Press the J-DIAL until the SEA appears highlighted in the upper right corner of the display. Rotate the J-DIAL clockwise, or counterclockwise to vary the sea clutter control and thus control the strength of echo returns from the sea surface. [. . . ] The layman should never remove the radar unit cover, nor attempt to service this equipment. When servicing this equipment, it is important that the technician complies with all safety precautions set forth in this manual. The high voltage can cause severe personal injury. 5. 1 PREVENTIVE MAINTENANCE Continuous satisfactory operation of the radar depends on how well it is treated. The following maintenance tips will save you time and money and will help to avoid equipment failure. [. . . ]