FurunoメーカーCSH-23/24の使用説明書/サービス説明書
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COLOR SCANNING SONAR MODEL CSH-23/24.
Your Local Agent/Dealer Your Local Agent/Dealer 9-52 Ashihara-cho, 9-52 Ashihara-cho, Nishinomi y a, Ja p an Nishinomi y a, Ja p an Tele p hone : Tele p hone : 0798-65-2111 0798-65-2111 Telefax : Telefax : 0798-65-4200 0798-65-4200 FIRST EDITION : FIRST EDITION : NOV.
i i i i i i i i i i i i i i SAFETY INSTRUCTIONS WARNING Immediately turn off the power at the switchboard if water leaks into the equipment or something is dropped in the equipment. Continued use of the equipment can cause fire or electrical shock. Contact a FURUNO agent for service.
ii CAUTION Do not exceed 18 knots when operating the equipment and do not exceed 16 knots when lowering or raising the transducer. The transducer may become damaged.
iii T ABLE OF CONTENTS FOREWORD A W ord to CSH-23/24 Owners ............................................................................................... vii Features ..................................................................................
iv FUNCTION KEYS Programming the Function Keys ........................................................................................... 6-1 Replaying a Function Key ...................................................................................
v W ARNINGS Overvoltage W arning ........................................................................................................... 12-1 Unretracted Transducer W arning .........................................................................
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vii FOREWORD A W ord to CSH-23/24 Owners Congratulations on your choice of the FURUNO CSH-23/24 Color Scanning Sonar . W e are confident you will see why the FURUNO name has become synonymous with quality and reliability . For over 40 years FURUNO Electric Company has enjoyed an enviable reputation for qual- ity marine electronics equipment.
viii System Configuration.
1-1 CONTROL DESCRIPTION Control Layout on Display Unit and Remote Control Box SUB P ANEL 2 POWER TRANSDUCER OFF ON F1 F2 F3 - + NORM E/S HIST RECALL MEMO TARGET SLICE SHOOT R/B - + - + RANGE GAIN AUTO.
1-2 Main Panel POWER TRANSDUCER OFF ON F1 F2 F3 - + NORM E/S HIST RECALL MEMO T ARGET SLICE SHOOT R/B - + - + RANGE GAIN AUTO TIL T WIDTH TIL T SCAN DEPTH DIM CONT BRILL AUDIO NET COURSE T ARGET LOCK .
1-3 Control Function NORM, E/S, HIST (Mode keys) Select display mode: NORM, normal sonar picture; E/S, Echo sounder combination; HIST, Historical display. Lamp above a key lights to show current selection. RECALL, MEMO RECALL: Replays saved picture. MEMO: Saves picture to memory card or internal memory.
1-4 Sub Panel 1 RECALL MEMO HIST E/S NORM F4 F5 F3 F2 F1 ON OFF POWER TRANSDUCER CARD REPLAY COLOR NET REPLAY TX HELP END MENU Figure 1-3 Sub panel 1 Sub panel 1 contr ol description Control Function MENU Opens/closes the menu. END • When the menu is displayed it terminates menu operation and returns control to the sonar picture.
1-5 Sub Panel 2 (data setting window) SIGNAL DELETE MK TVG•TX ES SONR•BEAM AUTO ALM•AUDIO NEAR 7 MEDIUM 8 FAR 9 CYCLE 7 PL 8 OUTPUT 9 TVG TX + + + + + + – – – – – – h g OPER P-SET (TOGGLE) Setting change keys Change control setting. Item selection keys Select item.
1-6 n i a M m e t I m e t I g n i t t e S e g n a R n o i t p i r c s e D l a m r o N g n i t t e S n i a Mb u S L A N G I S L A N G I S S S E C O R P L N0 1 – 0.
1-7 n i a M m e t I m e t I g n i t t e S e g n a R n o i t p i r c s e D l a m r o N g n i t t e S n i a Mb u S M A E B • R N O S R A N O S R A N O S2 – 1 r o , r a n o s e l g n i s r o f " 1 " e s o o h C . r a n o s l a u d r o f " 2 " 1 T F I H S - F2 – 1 " 1 " e s o o h C .
1-8 Remote Control Box 1 2 3 DISP SELECT DATA EVENT TGT LOCK ESTIMATE 1 NET COURSE FISH OFF- CENT TX 1 23 4 FUNCTION 5 – + RANGE + – GAIN SHOOT MEMO TGT SLICE RECALL AUTO AUTO VERT SCAN TILT TRAIN SCAN DEPTH Each press displays water temperature or depth at screen center for about five seconds.
2-1 OPERA TIONAL OVER VIEW T urning the Power On/Off Turning the power on Press the ON switch on the main panel. The lamp above the switch should light. If it doesn’ t, press the TX switch on sub panel 1. T urning the power off Retract the transducer with the c switch and then press the OFF switch on the main panel.
2-2 Selecting a Display Mode The CSH-23/24 provides three display modes: normal sonar pic- ture, echo sounder (E/S) combination, and history display com- bination. Those modes may be selected with the NORM, E/S and HIST keys. T able 2-1 Display mode description Mode Description The sonar picture appears over the entire screen.
2-3 Selecting a Display Range Operate the RANGE control to select a display range. The se- lected range appears at the top of the screen. Setting the T ilt Angle The tilt angle shows the direction to which the sound wave is emitted.
2-4 How to discriminate fish echoes from the seabed The figure below illustrates how two fish schools a and b are displayed on the screen using three different tilt angles. Case 1: T ilt angle 30 to 40 degrees. Fish school is obscured by the seabed. Case 2: T ilt angle 10 to 20 degrees.
2-5 Tilt angle for surface fish Sound emitted from the sonar transducer forms a circle-shaped beam with a width of approximately 12 degrees in the vertical direction (vertical beam width). The tilt angle is indicated by the angle between the center line of the beam and the horizontal plane.
2-6 Suitable tilt angle The figure below illustrates the relationship among tilt angle, depth and detection range. Refer to it to find out the suitable tilt angle for a given depth/detection range.
2-7 Adjusting the Gain The GAIN control adjusts receiver sensitivity (gain). Adjust it so fish echoes are clearly displayed with minimal noise on the screen.
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3-1 FINE TUNING THE PICTURE Eliminating Unwanted Feeble Echoes Echoes from targets such as seabed and fish return to the trans- ducer in order of distance to them, and when we compare their intensities at the transducer face, those from nearer targets are generally stronger when their reflecting properties are nearly equal.
3-2 4. When sea surface reflections or plankton layers disturb the picture, decrease appropriate TVG option by one or two steps by pressing – (minus) key . 5. When fish school is located on a long range setting (about 800 meters) which is approaching own ship.
3-3 Suppressing Seabed T ail AGC (data setting window: SIGNAL, SIGNAL PROCESS) The AGC functions to automatically reduce the receiver gain only against strong echoes such as the seabed or a large fish school. Since weak echoes remain unaffected, a small fish school becomes easier to detect.
3-4 Suppressing Seabed and Sea Surface Reflections in Shallow W aters Data setting window: TVG•TX, OUTPUT In shallow fishing grounds with hard or rocky bottom, seabed reflections often interfere wit.
3-5 1. T urn of f the TX switch and operate all on-board equipment one by one while observing the picture. 2. Run the boat at various speeds to check if the noise is speed dependent.
3-6 Setting F-shift (data setting window: SONR•BEAM, SONAR) If interference cannot be suppressed by the interference rejector (IR) or Tx cycle, change the setting of F-SHFT from 1 to 2.
4-1 MARKS AND DA T A Marks, Data and Display Mode Normal display mode Figure 4-1 Marks and data appearing in the normal display mode.
4-2 Figure 4-2 Marks and data appearing in the normal display mode w/text Figure 4-3 Marks and data appearing in the echo sounder display mode Normal display mode w/text Echo sounder combination displ.
4-3 Figure 4-4 Marks and data appearing in the histor y display mode Permanently Displayed Marks and Data Range Data Shows the range scale set with the RANGE control.
4-4 Mark/Data Description Shows own ship’s present position. The direction of the arrow shows ship’s heading. This mark moves with ship’s movement in the * true motion mode.
4-5 Range Rings The range rings are inscribed at intervals of 1/4 of the range in use. Range ring data is also provided every two range rings. The range ring interval can be changed from 1/4 to 1/2 through the menu. Mark/Data Description Latest Fish Mark Fish Mark Fish Mark These marks are inscribed on the screen by pressing the FISH key.
4-6 *Ship’s Track Mark With gyrocompass or speed log connection, own ship’s track is plotted by a solid line. When the length of the line exceeds five times the range the oldest part of the track is erased.
4-7 Mark Description Target Lock Mark The target lock mark automatically tracks the fish school selected by the operator. This function requires speed and gyrocompass inputs. Net Shooting Mark Net Shooting Data Press the SHOOT key at the instant you shoot the net to display the net shooting mark on the display.
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5-1 MENU OVER VIEW Many functions are carried out through the menu system, which consists of the USER, SYSTEM, DA T A SET and INITIAL SET/ DA T A menus. The menu you will use most often is the USER menu. Menu How to open USER SYSTEM DATA SET INIT SET/TEST Press MENU.
5-2 2. Operate the arrow keys in sub panel 1 to select a menu. As you move through the menu, each item, initially shown as blue on gray , reverses to gray on blue to show selection. For example, select the HIST DSP/GRPH menu. 3. Press the MENU key to display menu selected.
5-3 USER Menu Description T able 5-1 User menu description u n e Mm e t I u n e Mn o i t p i r c s e D D R A C Y T I L I T U t s i L. d r a c y r o m e m f o s t n e t n o c s t s i L e v a S. d r a c y r o m e m o t s g n i t t e s u n e m d n a l o r t n o c s e v a S e t e l e D.
5-4 u n e Mm e t I u n e Mn o i t p i r c s e D C E V T N E R R U C k r a M p i h S n w O c e V t n e r r u C / w k r a M n o i t i s o P n w O c e V t n e r r u C / w k r a M t o o h S t e N c e V t n e r r u C / w r i D w o l F t n e r r u C n o i t c e r i D w o l F t n e r r u C .
5-5 SYSTEM Menu Description The SYSTEM menu can be displayed by pressing MENU and c together . For help, press the HELP key . u n e Mm e t In o i t p i r c s e D L A N G I S S S E C O R P g n R o h c E h t o o m Se g n a r n i l e v e l g n i h t o o m s o h c e s t c e l e S r e h g i h e h t , r e b m u n e h t r e h g i h e h T .
5-6 u n e Mm e t In o i t p i r c s e D K C O L T E G R A Te t a d p U d p S h s i F. t u o d a e r d e e p s h s i f f o l a v r e t n i e t a d p u s t c e l e S , s d n o c e s 0 3 , s d n o c e s 5 1 m o r f t c e l e s n a c u o Y l a m r o n e h t s i 0 6 .
5-7 u n e Mu n e M u n e M u n e Mu n e Mm e t Im e t I m e t I m e t Im e t In o i t p i r c s e Dn o i t p i r c s e D n o i t p i r c s e D n o i t p i r c s e Dn o i t p i r c s e D C E R T E N / S Ee v r u C r o l o C 1 S Er o l o c n o i t a t n e s e r p s u s r e v l e v e l o h c e s t c e l e S .
5-8 DA T A SET Menu Description The DA T A SET menu can be displayed by pressing MENU + d . For help, press the HELP key . u n e Mm e t In o i t p i r c s e D E V R U C R O L O C1 r a n o S 2 r a n o .
5-9 u n e Mm e t In o i t p i r c s e D R O L O C E G N A H C1 r a n o S 2 r a n o S r e d n u o S o h c E s k r a M u n e M s m e t i e s e h t f o r o l o c e h t e z i m o t s u c n a c u o Y r a n o S t a h t e t o N . c t e , t s e u q e r r e s u o t g n i d r o c c a n o e g n a h c r o l o c y a l p s i d r o F .
5-10 u n e Mm e t In o i t p i r c s e D T O O H S T E N N A L P r e t e m a i D t e Ny r a s s e c e n r e t e m a i d n r u t s ' p i h s d e t a m i t s e s t e S f o n o i t c i p e d e t a r u c c a t e g o t , t e n g n i t o o h s r o f y b y a l p s i d n a c u o y h c i h w , k r a m n o i t a c o l t e n g n i t t e s e h T .
5-11 INIT SET/TEST Menu Description The INIT SET/TEST menu can be display by pressing MENU and ON together . u n e Mm e t In o i t p i r c s e D J D A G N I D A E Ht s u j d A g n i d a e Hl l u h n o k r a m D A E H f o e l g n a n o i t a i v e d s t e S 5 1 s i n o i t a i v e d f I .
5-12 u n e Mm e t In o i t p i r c s e D T S E T O H C Et s e T y a l p s i Df o n o i t c e n n o c t u o h t i w t i n u y a l p s i d e h t s k c e h C . d e y a l p s i d s i n r e t t a p t s e t A . s t i n u r e h t o n o i t a r t s n o m e D.
6-1 FUNCTION KEYS Similar to the quick dialing function on a telephone, the five function keys (F1–F3) on the main panel record control and menu settings and replay them back exactly as programmed. The items you can program are gain, display mode, TX ON/OFF , USER menu, SYSTEM menu, DA T A SET menus and data setting win- dow .
6-2 FUNCTION KEY REGISTER 1 USER MENU Customized settings are registered to FUNCTION keys. Select key number with ↑ ↓ key and press MENU key. Press END key to return to sub menu. Figur e 6-2 REGISTER menu 5. Press the up or down arrow key in the sub panel 1 to select the function key to program, then press the MENU key .
6-3 Function Key Fine Tuning Fine Adjustment Item -4 -3 -2 -1 0 1 2 3 4 5 TVG Near -3 -2 -1 0 0 1 1 2 3 4 TVG Mid -3 -2 -1 0 0 0 1 1 2 3 TVG Far -3 -2 -1 0 0 0 0 1 1 2 Tx Cycle 0 0 0 0 0 0 0 0 0 0 Tx Beamwidth -3 -2 -1 0 0 0 0 0 0 0 Tx Power -2 -1 0 0 0 0 0 0 0 0 Saving Function Key Settings to a Memory Card 1.
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7-1 ADV ANCED LEVEL OPERA TION Finding Fish School Center When you want to find the center depth of a fish school, use the auto tilt function, which automatically scans the tilt angle within the selected width. There are two automatic scan range, WIDE and NARROW , which can be selected by the INIT SET/TEST menu.
7-2 T racking a Fish School (target lock) T arget lock, which requires speed and heading inputs, automati- cally tracks an important fish school so that you wonít lose sight of it on the display screen. T wo types of target lock are avail- able: T arget Mark or Fish.
7-3 T arget lock mark appearance The size and thickness of the tar get lock mark indicates fish speed and tracking status, as shown below . Meaning T arget lock mark appearance Mark size indicates relative speed. Fast Medium Slow (More than 5 Tx cycles) (Up to 3 Tx cycles) Mark thickness shows tracking status.
7-4 4. Select T racking Method, and then press the [MENU] key . 5. Select method desired. 6. Press the [END] key several times to close the menu. T racking target lock mark 1. Operate the trackball to place the trackball mark on the fish school you want to track.
7-5 Setting target lock conditions 1. Open the sub panel 1. 2. Press the [MENU] key while pressing and holding down the down arrow key in sub panel 1. 3. Select T ARGET LOCK with the arrow keys. 4. Press the [MENU] key . SYSTEM MENU TARGET LOCK Tracking Method TGT Mark Fish Track Echo Color 8 Choose weakest echo to track.
7-6 Description of target lock items T rackingMethod Sets tar get lock function: tar get lock mark, fish or automatic. T rack Echo Color Sets minimum echo signal level to track. A fish school whose signal level is above the level set here is tracked. Fish Speed Limit Sets fish speed at which target lock is cancelled.
7-7 Detecting Fish Schools Aurally Sometimes you may be preoccupied with other tasks and unable to concentrate on watching the sonar picture. In such cases it would be a good choice to use the audio function. This function enables you to monitor echoes from fish schools and seabed through the built-in speaker .
7-8 The Fish Alarm The fish alarm sounds an audible alarm when a fish echo above a preset strength enters an alarm zone. Y ou set parameters for the fish alarm at ALM on the data setting window . ON/OFF: T urn alarm on or of f. Level: Set echo strength level which will activate the alarm.
7-9 Relocating Fish School for Easy Observation 1. Operate the trackball to place the trackball mark on the posi- tion where you want to relocate the own ship mark. 2. Press the OFF-CENT key . 3. T o move the own ship mark back to the screen center , press the OFF-CENT key again.
7-10 Comparing of Fish School Concentration Y ou can get an estimate of the volume of two fish schools by using the two ESTIMA TE keys. 1. Operate the trackball to place the trackball mark on a fish school, and then press the ESTIMA TE 1 key . The estimate mark appears on the fish school.
7-11 Measuring Fish School Speed T o ensure a good haul, it is important to estimate the direction and speed of the fish school before shooting the net. Y ou can do this with the FISH key . If the tidal current data is used together with fish speed data, you can determine the timing of the net shooting more ef ficiently .
7-12 Note 3: Each time the FISH key is pressed the latest fish mark and ship’ s speed mark change in the sequence shown below: Fish key pressed once: Fish key pressed twice: Fish key pressed three t.
7-13 Entering an event mark 1. Set the trackball mark where you want to place an event mark (latest event mark). 2. Press an EVENT key . The horizontal range, depth and bear - ing to the event mark appear at the bottom left corner of the screen. (35) Stored when EVENT key is pressed.
7-14 T rue Motion Display The relative motion display places the own ship mark at the screen center , and echoes from fish and the seabed move on the screen relative to own ship’ s movement. This means that even when the ship is dead in water , fish echoes move on the display .
7-15 Plotting Net Location Mark Before shooting net, you will decide the shoot timing consider - ing the water current direction, distance to fish school and mov- ing direction of the fish school. Use the net location mark as a guide to decide the timing.
7-16 Observing Net Behavior W ith net sonde connection you can observe net behavior after the throwing of the net, on the echo sounder combination mode. Accurate depiction of net sonde position depends on proper set- ting of the distances between net sonde transmitters.
7-17 T arget Slice Display Using automatic tilting, the tar get slice mode displays the echo inside the estimate mark at several dif ferent tilt angles (depth). T o access the target slice display , press the T ARGET SLICE key . The table and illustration below describe the tar get slice mode.
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8-1 PORT/ST ARBOARD, HORIZONT AL SLICE DISPLA YS The port/starboard display or horizontal slice display may be displayed by pressing the [HIST] key . The display shown de- pends on the setting of “HIST DSP/GRPH” in the USER menu.
8-2 Horizontal slice display 120 degrees of the picture in the horizontal direction is shown for a given depth (D) in the horizontal slice window at the bot- tom of the display .
9-1 MEMOR Y CARD OPERA TIONS Initializing Memory Cards Before you save information to a memory card it must be initial- ized (formatted). 1. Press the MENU key to display the USER menu. 2. Select the CARD UTILITY menu. 3. Select Initialize. It takes more than two minutes to initialize a memory card.
9-2 Saving the Picture Y ou can save either the whole screen or the echo inside the esti- mate mark to the internal memory or a memory card. e v a S o t a t a Dd o h t e M g n i v a So t g n i v a S ,.
9-3 Saving Net Shooting Data How net shooting data is saved The unit starts accumulating net shooting data when the SHOOT key is pressed. When net shooting is concluded by pressing the SHOOT key again, the echo inside the estimate mark and other net shooting data are saved to the internal memory .
9-4 Replaying Saved Data Whole picture or echo inside estimate mark 1. Press the RECALL key (on the main panel). 2. Press the right or left arrow key in sub panel 1 to select item to replay . The left arrow key selects older data (for example, data in memory card); the right arrow key newer (for ex- ample, data in internal memory).
10-1 TURNING MARKS, DA T A ON/OFF Y ou can turn marks and data on or off through the data setting window or the USER menu. T urning marks on/off through the data setting window Select DELETE MK to delete the following marks: Event Mark 1 Event Mark 2 Fish Mark Own Ship Mark Ship's Track Each press of + or – deletes mark selected, one by one.
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11-1 INTERPRETING THE DISPLA Y Seabed Echoes When the tilt angle is widened, the seabed echo illustrated be- low will appear on the display . When the tilt is narrowed, the seabed trace becomes wider and weaker . By observing the sea- bed condition on the display , the skipper can prevent net dam- age.
11-2 Fish Schools A fish school appears as a mass of echoes on the screen. The color of the mass shows the density of fish schools on the sonar beam. T o find distribution and center point of a fish school, try several dif ferent tilt angles.
11-3 Sea Surface Reflections T o reduce sea surface reflections, set the tilt angle to 5 ° or higher, so the upper edge of the sonar beam does not hit the sea surface, or adjust TVG. When a narrow tilt angle is used, sea surface reflections cover a large area as illustrated below .
11-4 False Echo by Sidelobe An ultrasonic wave is emitted only in the direction set by the TIL T lever , however there are some emissions outside the main beam.
12-1 W ARNINGS Overvoltage W arning If the input voltage to this unit rises above 125 V AC, the over - voltage detection circuit activates, an alarm sounds and the mes- sage OVER VOL T AGE appears at the screen center . If this occurs, retract the transducer , turn the power of f and check the ship’ s mains voltage.
12-2 Main Shaft Hull Unit Hand Crank Breaker Raise/Lower Control Box Reset Button Figure 12-1 How to manually raise the transducer.
13-1 SELF TESTS The CSH-23/24 has various self tests to check it for proper op- eration. If a test reveals equipment malfunction do not attempt to check inside the equipment. There are no user serviceable parts inside the equipment. Do not open the cover.
13-2 Self T est Description Single test The ROM, RAM and other devices of the display unit are checked once. Control is returned to the SELF TEST menu when the test is completed. Continuous test The devices of the display unit are checked con- tinuously .
13-3 Panel test This test checks the keys of the main and sub pan- els and the remote control box. Press and release each key . Its on-screen location should display “1” when the key is pressed and “0” when released. T o escape from the test reset the power .
13-4 Gray test This test checks for screen distortion. T o escape from the test reset the power . SIO test This test checks for proper communication between the display unit and transmitter unit, and requires a jumper plug. T o escape from the test reset the power .
13-5 Interface Unit CS-120A Self T est 1. Open the cover of the interface unit. 2. Find DIP switch DP-1 on the lone circuit board. T urn switch #6 on to start the self test. The results of the check appear on the digital display beside the DIP switch.
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14-1 INPUT DA T A SELECTION Selection of Data at Interface Unit CS-120A Nav data and fish data input from external equipment can be turned on or off at DIP switch DP-1 in the Interface Unit CS- 120A. Ship's speed and bearing (for track plotting, true motion, target lock, etc.
14-2 Setting Distances Between Net Sonde T ransmitters T o accurately display the net shooting mark and net sonde mark position, the distance between transmitters must be correctly set. This is done on the DA T A SET menu. R1 R0 R2 R0: Length of net from its end to transmitter1 in meters.
15-1 MAINTENANCE Do not open the cover. There are no user-serviceable parts inside. Refer any repair work to a qualified technician. WARNING Display Unit Maintenance Keep magnets and cassette tapes away from the display unit. Handle the equipment with care.
15-2 Hull Unit Maintenance HULL UNIT Apply MOLYTONE grease #2 every six months. Dry dock ship and clean transducer face yearly. Apply single coat of "MARINE STAR 20 Mod (Red-N)" anti-foulant to transducer face to keep marine life off the transducer.
A-1 MENU TREE USER Menu Event Mark 1 Event Mark 2 Fish Mark On Track Data Text Window ES Window Range/Bearing Heading Mark Range Rings Bearing Scale Auto Scan Width Ship's Track Net Movement Plot.
A-2 DA T A SET Menu Setting range: 200-1000 m ON OFF Setting range: 0-3000 m Setting range: 0-1000 m Execute Execute Execute Execute Execute Execute Execute CHANGE COLOR DATA SET MENU Sonar 1 Sonar 2 .
A-3 INIT SET/TEST Menu Setting range: 0°-359° INIT SET/TEST MENU HEADING ADJ Heading Adjust NMEA 4800, 9600 bps Negative Positive Negative Positive EXT KP KP Out Polarity EXT KP Polarity Gray SIO Ex.
A-4 SYSTEM Menu 25log 30log 35log 40log F AR TVG Far TVG Curve Setting range: 0 to 3 SIGNAL PROCESS Smooth Echo - - - Rng Smooth Echo - - - Cir Delete Color Setting range: 0 to 3 Setting range: 1 to 10 SYSTEM MENU 1.
A-5 Execute DEFAULTS Defaults HIST DISPLAY H-Slice Width PRT/STBD Sample Net Shoot Mark Target Lock ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF INTERLOCK Tilt Range Event Mark Fish Mark SYSTEM MENU (Con.
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SP-1 SPECIFICA TIONS Model: CSH-23/24- M 1 (Freq.: 24 kHz) 4 (Freq: 40LkHz) 2 (Freq.: 28 kHz) 5 (Freq: 40HkHz) 3 (Freq.: 32 kHz) 6 (Freq: 45 kHz) 1. GENERAL (1) Range, TX Cycle, Pulselength c i s a B .
SP-2 (3) T ransceiver T ransmitter High power MOS FET amplifier with 10-step power reduction switch Receiver Low noise superheterodyne, continuously scanning beam form ing, TVG, AGC, signal/processing, interference rejecter , hori zontal vertical beam switching.
SP-3 (6) Features Custom mode, interference rejector, after glow , noise limiter , delete color , memory card (save and recall of picture, echo inside estimate mark and net shooting data), automatic t.
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IN-1 INDEX A AGC ................................................................ 3-3 2AGC .............................................................. 3-3 AUDIO ........................................................... 7-5 B Beamwidth ...........
デバイスFuruno CSH-23/24の購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Furuno CSH-23/24をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはFuruno CSH-23/24の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Furuno CSH-23/24の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Furuno CSH-23/24で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Furuno CSH-23/24を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はFuruno CSH-23/24の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Furuno CSH-23/24に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちFuruno CSH-23/24デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
