Koden Electronics RB716A Marine Radar RA42C User Manual 14

Koden Electronics Co., Ltd Marine Radar RA42C 14

14

755.5.4.5.4 Changing the content of settings (ADJUST)The items in the ADJUST menu are ones that need adjustment at the time of installation.The settings need not normally be altered.(1) Adjusting distance (TIMING ADJ)This adjustment is necessary to adjust the distance on the radar screen to the actualdistance.(1) In preparation for adjusting the distance, the following adjustments are to be conducted.First, set the radar range to 0.25 NM, FTC to minimum, and GAIN to optimum. Thenadjust STC until the pulse generated by your own radar appearing at the center of thescreen is clearly recognized as a round dot.(2) Adjusting the distance.(2)-1 Select ADJUST by "common operations for CUSTOM", use up-down cursor keys toselect TIMING ADJ from among the pull-down display items and press the "ENT" key.(2)-2 As the distance adjustment screen is displayed, adjust timing until the center dotlooks as (b) with the control knob. If there is a linear target such as a bridge orbreakwater, adjust timing until the target appears straight in the screen.(2)-3 When the adjustment is finished, press the "ENT" key to exit from the distanceadjustment screen.Up/Down →ENT →Control knob →ENTselect TIMIG ADJ •Timing adjustment finished(2) Adjusting angle (HEAD ADJ)This adjustment is necessary to adjust the head direction on the screen to the actualdirection of the ship.Note: Heading offset value for open antenna is different from that for a radome antenna.(1) In preparation for adjusting the angle, the following adjustments are to be conducted.(1)-1 Find one small target within a 0.5 to 1.5 NM range which, lying in the bow direction,can be detected with eyes and is clearly visible in the radar screen.(1)-2 Measure the bearing of this target from the bow direction using a compass. Let it be•c.(1)-3 Measure the bearing of the above target in head up (HU) mode using EBL. Let it be•r.(1)-4 Calculate the following:•c - •r• if•c is greater than •ra) Too far b) Correct c) Too shrunk
76360 - ( •r - •c ) • if•r is greater than •cThis is the azimuth error of your radar at installation. If •c and •r are equal, theadjustment described below is unnecessary.(2) Adjustment method(2)-1 Select ADJUST by "common operations for CUSTOM", use the up-down cursor keysto select HEAD ADJ from among the pull-down display items and press the "ENT"key.(2)-2 As the distance adjustment screen is displayed, set the value to the azimuth erroryou have calculated above with the control knob.(2)-3 When the adjustment is finished, press the "ENT" key to exit from the distanceadjustment screen.Up/Down →ENT →Control knob →ENTSelect HEAD ADJ. Set a value to .(3) Adjusting tuning circuit (TUNING CAL)Normally you do not need to make this adjustment. This adjustment may necessary toensure that the automatic tuning circuit operate at its best operating point. However, ifsensitivity is poor or there is any symptom suggesting improper tuning, you may need to adjustthis circuit following the procedure below.(1) Choose several stable video images in the 3 NM range or more.(2) Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys toselect TUNING CAL. from among the pull-down display items and press the "ENT" key.(3) As the tuning circuit adjustment screen(TUNING CALIBRATION) is displayed, select AUTOwith up-down cursor key.(4) While watching video images, adjust until echoes are clearly visible with the control knob.(5) Select MANUAL with the down cursor key.HEAD DIRECTION ADJUSTMENTADJ UST WITH CONTROL KNOBPRESS ENTER KEY TO RETURN _358.8°°°°_HEADING Adjustment31HU
77(6) Adjust until echoes are clearly visible with the control knob. This set status is middlevalue of manual tuning.(7) When the adjustment is finished, press the "ENT" key to exit from the TUNINGCALIBRATION screen.Operate of (3) to (7) Up/Down →Control knob →Up/Down →Control knob •→ENTSelect AUTO Adjust tuning Select MANU Adjust tuning(4) Adjusting antenna height (ANTENNA)Depending on the position at which the antenna is installed, it may be necessary to makethe following correction. (Consult distributor for details.)(1) Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys toselect ANTENNA from among the pull-down display items and press the "ENT" key.(2) As the adjustment screen is displayed, using the control knob to choose your desired valuefrom 1 to 9.(3) Press the "ENT" key to exit from the adjusting antenna height screen.Up/Down →ENT →Control knob →ENTSelect ANTENNA Choose value CompleteAdjust with control knobSelect with up-downcursor keyEcho remain.TUNING CALIBRATIONREAD OPERATION MANUALSELECT ITEM WITH •• KEYTUNE WITH CONTROL KNOBPRESS ENTER KEY TO MEMORYAUTO ••••••••MANUAL ••31HUAdjust with Control knobSTC CURV E ADJUSTMENTADJ UST WITH CONTROL KNOBPRESS ENTER KEY TO MEMORYSTC CURV E _5_ 31HUANTENNA Adjustment
78(5) Setting GAIN circuit (GAIN)Here, you set the automatic and manual gain level. Normally, adjust this setting to beslight the noise echo appears on the screen.•When enter this setting at AUTO mode, you canpreset AUTO GAIN level. When enter at MANUAL mode, you can preset the MANUAL GAIN tocurrent MANUAL gain level as the standard. When you enter the setting at "G60" of gain level,for instance, gain level of "G60" is preset as the standard level.(1) Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys toselect GAIN from among the pull-down display items and press the "ENT" key.(2) As the adjustment screen is displayed, using the control knob to choose your desired valuefrom 1 to 30.(3) Press the "ENT" key to exit from the adjustment screen.Up/Down →ENT →Control knob →ENTSelect GAIN Choose value Complete(6) Setting STC circuit (STC)Here, you set the STC level. Adjust this setting to be slight sea clutter appears on thescreen, when you observe a small target (ex. Small buoy). When enter this setting at AUTOmode, you can preset AUTO STC level and AUTO FTC level. When enter at HARBOR (HBR)mode, you can preset HARBOR STC level.When enter at MANUAL mode, you can preset MANUAL STC level as the standard level.(1) Select ADJUST by "common operations for CUSTOM", use the up-down cursor keys toselect STC from among the pull-down display items and press the "ENT" key.(2) As the adjustment screen is displayed, using the control knob to choose your desired valuefrom 1 to 16.(3) Press the "ENT" key to exit from the adjustment screen.Up/Down →ENT →Control knob →ENTSelect STC Choose value Complete

Navigation menu