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EMP-S1 User’s Guide

Before Using the Projector > Part Names and Functions

Control panel

[Power] button 

s

 P.20

Turns the projector on and off.

Power indicator 

s

 P.20, P.42

Flashes or lights in different colours 
to indicate the operating status of 
the projector.

[

u

][

d

][

l

][

r

] buttons 

s

 P.32

[

w

][

v

]: keystone correction buttons 

s

 P.25

Press to correct keystone distortion in images.

[Wide][Tele]: zoom buttons

s

 P.23

Warning indicator 

s

 P.43

Flashes or lights in different colours to 
alert you to problems with the 
projector.

[Menu] button 

s

 P.31

Displays or hides the 
configuration menus.

[Source] button 

s

 P.26

Switches the input source 
between the Computer/
Component Video port, 
S-Video port and Video port 
each time the button is 
pressed.

[

e

] button 

s

 P.33

Accepts a menu item or 
advances to the next screen or 
menu when viewing 
configuration menus. 

[Esc] button 

s

 P.34

Stops the current function.
Displays the previous screen 
or menu when viewing 
configuration menus. 

Summary of Contents for EMP-S1

Page 1: ...1 EMP S1 User s Guide User s Guide ...

Page 2: ...ctor and other optional products c Indicates the possibility that people may be injured or the equipment may be damaged if these symbols are ignored p Indicates important related information or useful information and things you should know s Indicates related topics and pages which contain more detailed information g Provides terminology definitions s Glossary P 62 ...

Page 3: ...projector s compact body is easy to carry Dimensions 26 5 d 37 w 10 6 h cm Weight approx 3kg f Clear vivid images The projector s high resolution and high luminance achieves a legible display Project sharp detailed images even in bright places f Ease of use Various projector operations can be easily performed using the included remote controls as follows pausing projection zooming in on important ...

Page 4: ...ation Turning on the Projector 20 Turning off the Projector 22 Adjusting the Display 23 Adjusting the projection size 23 Setting the focus 23 Adjusting the projection angle 24 Keystone 25 Selecting the Input Source 26 Advanced Operation Functions for Enhancing Projection 27 Adjusting computer generated images 27 Selecting a colour mode 27 A V Mute 28 Freeze 28 Projecting in widescreen changing asp...

Page 5: ...ent the lens from becoming dirty or damaged focus ring s P 23 Adjusts the image focus front foot left s P 24 Another front foot is located on the right side Extend and retract to adjust the projection angle foot button left s P 24 Another foot button is located on the right side Press both feet buttons when extending and retracting the front feet speaker handle Pull out this handle to use when car...

Page 6: ...ide Tele zoom buttonss P 23 Warning indicator s P 43 Flashes or lights in different colours to alert you to problems with the projector Menu button s P 31 Displays or hides the configuration menus Source button s P 26 Switches the input source between the Computer Component Video port S Video port and Video port each time the button is pressed e button s P 33 Accepts a menu item or advances to the...

Page 7: ...onnects the power cable Video port s P 18 Inputs Composite Videog signals to the projector Connect using an A V cable S Video port s P 18 Inputs S Videog signals to the projector Connect using an S Video cable security lock s P 63 Audio port s P 14 P 19 Inputs audio signals to the projector Connect using an A V cable or a stereo RCA cable When using computer and video equipment alternately swap th...

Page 8: ...when suspending the projector from the ceiling lamp cover s P 56 Open this cover when replacing the lamp inside the projector air filter air intake vent s P 54 P 59 Prevents dust and other foreign particles from being drawn into the projector When replacing the lamp replace the air filter also handle Pull out this handle to use when carrying the projector ...

Page 9: ...ious screen or menu when viewing configuration menus e button s P 33 Accepts a menu item or advances to the next screen or menu when viewing configuration menus u d l r buttons s P 32 Selects menu items and setting values Power button s P 20 Turns the projector on and off A V Mute button s P 28 Momentarily turns off the audio and video Freeze button s P 28 Keeps the current computer or video image...

Page 10: ...ically The remote control infrared receiver on the back of the projector can also be used under the same conditions f Storage When not using the remote control please store it in the remote control holder on the projector A Open the remote control holder B Place the remote control in the remote control holder C Close the remote control holder until it clicks into place p If direct sunlight or fluo...

Page 11: ...wall leave a space of at least 20cm between the projector and the wall Projection distance 87 1109cm 20cm 7 9in or more 4 3 Screen size cm ft A cm ft B cm in 30 61 46 24 0 18 1 87 108 2 9 3 5 4 2 40 81 61 31 9 24 0 117 145 3 8 4 8 6 2 60 120 90 47 2 35 4 177 219 5 8 7 2 9 3 80 160 120 63 0 47 2 237 293 7 8 9 6 12 5 100 200 150 78 7 59 1 297 367 9 7 121 14 6 200 410 300 161 4 118 1 596 738 19 6 24 ...

Page 12: ...anslucent screen The optional ceiling mount is required when installing the projector from a ceiling Please contact your dealer if you wish to use this method as special equipment is required for installation s Optional Accessories P 60 p When using rear projection or projecting from a ceiling select the appropriate mode in the Setting Screen Projection configuration menu s Setting menu P 38 ...

Page 13: ...e contact the nearest address provided in the International Warranty Conditions section in the Safety Instructions World Wide Warranty Terms guide Depending on the PC the monitor may go blank when using the external video output on the computer c When connecting be sure to Turn off the power for both the projector and the computer Damage may result if you try to make a connection when the power is...

Page 14: ...nitor port To Computer Component Video port Computer cable accessory To monitor port VGA HD15 BNC PC cable optional To Computer Component Video port p Select Computer in the Image Input signal configuration menu s Image menu P 35 Do not bind the power cable and computer cables together Interference or operational problems may result A particular type of cable may be required for some workstations ...

Page 15: ...ing menu P 38 Connecting to an external monitor The image being input into the projector can be displayed on a computer monitor p When using computer and video equipment alternately swap the cable or use an audio switch To audio out port stereo mini jack 2RCA cable commercially available RCA jack To Audio port stereo mini jack p Video images cannot be output to an external monitor Setting gauges f...

Page 16: ...nation uses screenshots taken from Windows 98 Driver installation is not required for the Macintosh A Connect the accessory Presentation Remote Receiver to the USB port of the computer The Add New Hardware wizard is displayed Under normal circumstances maintain the default settings and click Next to proceed B Click Next p The Presentation Remote Receiver can only be connected to computers with a s...

Page 17: ...ayed F Click on Finish The installation of the driver is complete p You may need to enter a different location to search for the OS files that you are using Click on Browse if you want to change the default search location p The driver installation screen is displayed a second time The Presentation Remote Controller driver has two parts the mouse driver and the keyboard driver Follow the on screen...

Page 18: ...o image on the screen Page Up Page Down buttons Press these buttons to scroll back and forth through pages when projecting a PowerPoint presentation A V Mute button Momentarily turns off the audio and video remote control infrared transmitter Transmits remote control signals joystick To move the mouse pointer move the joystick in any of the following directions up down left right diagonally R Clic...

Page 19: ...ower is switched on Check the connector types Damage may result if you attempt to insert a connector into the incorrect port To video out port AV cable yellow commercially available To Video port p After projection starts change the Input Signal setting in the Image menu to either Component Video YCbCrg or Component Video YPbPrg to match the signals from the video equipment s P 35 To S Video out p...

Page 20: ...Setting Volume s Setting menu P 38 p After projection starts change the Input Signal setting in the Image menu to Computer s P 35 For an RGB connection a commercially available adapter or converter cable may be required Computer cable accessory To Computer Component Video port To RGB out port p When using computer and video equipment alternately swap the cable or use an audio switch AV cable red w...

Page 21: ...ttach the power cable to the projector D Insert the power plug into a wall socket The power indicator lights orange E Turn on the power of the computer video If connected to a video source start playback c Turn off the power of the projector and the equipment you are connecting to p When using a laptop or a PC with an in built monitor select external video output on the computer s P 12 ...

Page 22: ... Guide Basic Operation Turning on the Projector F Press the Power button The projector beeps and the power supply indicator begins to blink green G Wait until the power indicator lights green It takes about 40 seconds ...

Page 23: ...nk D Wait until the power indicator lights orange Cool downg takes place It takes about 20 seconds E Unplug the projector from the outlet F Unplug the power cable at the projector G Replace the lens cover p The confirmation screen disappears if anything other than the Power button is pressed or if nothing is pressed for 7 seconds c Do not remove the plug while the power indicator is blinking or th...

Page 24: ... further away from the screen Setting the focus A Turn the focus ring to adjust the image focus p The default setting is wide The E Zoom function lets you enlarge parts of the image s E Zoom P 30 p If the surface of the lens is dirty or misted over as a result of condensation it may not be possible to adjust the focus correctly If this happens clean or de mist the lens s Cleaning the lens P 53 If ...

Page 25: ...gles to a screen it can be set up at a slight vertical angle instead Max 10 A Raise the front of the projector while pressing the feet buttons on both sides Extend the front feet Seen from the side Centre of lens Seen from above 1 9 6 p The height can be adjusted by turning the base of the front feet on either side Press the front feet buttons on both sides and slowly lower the projector down to r...

Page 26: ...corrected without distortion when the projector is tilted to a maximum of 15 p You can correct only vertical distortion with this function Horizontal distortion cannot be corrected p Screen size changes when keystone correction is performed If the images become uneven in appearance after keystone correction is performed decrease the sharpness setting Menu button Image Picture Quality Sharpness s I...

Page 27: ...nput signal command in the Image menu are displayed s Image menu P 35 Remote control The input source switches between Computer and Component video whenever the Computer button is pressed as shown above The input source switches between S Video and Video whenever the S Video Video button is pressed as shown above Computer Component video S Video Video p If two or more sources are connected be sure...

Page 28: ...ize brightness Presentation Brightness is emphasized For presentations in bright rooms Theatre Best for watching movies in their natural tones Living Room Brightness is emphasized Ideal for playing video games in bright rooms sRGBg Conforms to the sRGB colour standard If the connected source has an sRGB mode set both the projector and the connected source to sRGB The colour mode changes each time ...

Page 29: ...press the Freeze button again or press the Esc button p The screen colour during A V Mute can be set to black or blue The default setting is blue Menu button Setting Display Background Color s Setting menu P 38 When activated while projecting moving images the sound and image will continue to be played back by the source so it will not be possible to return to the point where A V Mute was activate...

Page 30: ...hen component video images YCbCr and YPbPr or video images S Video or composite video are being projected Images which have been recorded in digital video or onto DVDs can be viewed in 16 9 wide screen format A Press the Aspect button on the remote control to change the screen size as follows When images in Squeeze modeg are projected at 4 3 When images in Squeeze mode are projected at 16 9 ...

Page 31: ... l r buttons to move the target scope to the centre of the part you wish to enlarge reduce C Press E Zoomz to enlarge the image Press E Zoomx to reduce the enlarged image E Zoomz Enlarges part of the image without changing the size of the projection area E Zoomx Reduces the part of the image that has been enlarged using the z button You can scroll with the u d l r buttons Press Esc to cancel targe...

Page 32: ...r Tracking r Tint r Sync r Color Temperature r Color Temperature r Sharpness r Auto Setup r Input Signal r Input Signal Component video only r Reset r Reset Setting r r Screen r r Keystone r Position r Projection r Display r r Message r Background Color r Startup Screen r Video Signal r Volume r Sleep Mode r Language r Reset Info r Lamp Hours Info r Lamp Hours Computer Images Source Video Images S...

Page 33: ...S1 User s Guide Advanced Operation Configuration Menus Menu operation A Press the Menu button The top configuration menu is displayed B Press the u or d buttons to select the Top Menu item Top Menu Sub Menu 1 ...

Page 34: ...e u or d buttons in the same way then press the e button F Settings can be changed in the follwing ways a Press the l or r buttons to change the setting values b Press the u or d buttons to select the menu item Then press the e button Green Item currently set Orange Item currently selected Press the e button to confirm the selection p The mark is displayed after items which perform a setting or le...

Page 35: ... the l or r buttons to select the value Then press the e button d Press the u d l r buttons to move the image display position G Set other items in the same way Press the Esc button to return to the previous item or menu or select Return H Press the Menu button to finish ...

Page 36: ...l is being input only the settings for Auto Setup and Input Signal can be adjusted The functions in the Image Menu will be different according to the type of signal which is being input Input Signal only appears on menu screens when component video images are being projected Computer images Video images ...

Page 37: ...ghtness is emphasized For presentations in bright rooms Theatre Best for watching movies in their natural tones Living Room Brightness is emphasized Ideal for playing video games in bright rooms sRGBg Conforms to the sRGB colour standard If the connected source has an sRGB mode set both the projector and connected source to sRGB Picture Quality Brightness Adjusts the brightness of the image Contra...

Page 38: ...aturation Video images only Adjusts the colour depth Tint Video images only Adjustment is only possible when Component Videog or NTSC signals are being input Adjusts the tint of the image Auto Setup Computer images only ON When the input source is switched to a computer signal the projector automatically adjusts the image to its optimal state OFF Auto Setup is disabled Input Signal Computer compon...

Page 39: ...ection has been carried out decrease the sharpness setting Position Moves the image display position vertically and horizontally Press the e button and adjust the display area on the Position adjustment screen which is displayed Projection Front Image is displayed as is No vertical horizontal reversal performed Front Ceiling The image is displayed vertically reversed Rear The image is displayed ho...

Page 40: ...ng Sleep Mode Sets the energy saving option for when no signal is being input When a Sleep Mode interval has been set the projector will enter Sleep Mode when no operation has been carried out for the set time 5 10 and 30 minutes Projection will shut down and the projector enters a standby state after cooling down The power indicator lights orange Projection starts again when the Power button is p...

Page 41: ...he input signal settings Video Signal Video images only Displays the Video signal format Resolution Computer images only Displays the input resolution Does not appear when the input source is composite video or S Video Refresh Rateg Computer images only Displays the refresh rate Does not appear when the input source is composite video or S Video Sync Info Computer images only Displays picture sign...

Page 42: ...cumulative lamp operating time is reset to the default value All Reset Resets all items in the configuration menus to their default settings Press the e button and select Yes on the confirmation screen which is displayed Select Reset in an individual menu to reset only the settings for the items in that sub menu Input Signal Language and Lamp Hours settings will not be reset ...

Page 43: ...uld only be disconnected when the projector is in this state Press the Power button to start projection P 20 Orange Cool down in progress Not abnormal Please wait The cool down period lasts about 20 seconds You cannot operate the Power button during the cool down period Press the power button again after cool down has finished P 22 Green Projection in progress Not abnormal P 20 Green Warming up No...

Page 44: ...p is not broken re install it Reconnect the power cable and press the Power button on the projector or the remote control to turn it back on If the lamp is broken please contact your dealer or the nearest address provided in the International Warranty Conditions in the Safety Instructions World Wide Warranty Terms guide You will not be able to use the projector until the lamp is replaced Check tha...

Page 45: ...table please consult your dealer or contact the nearest address provided in the International Warranty Conditions in the Safety Instructions World Wide Warranty Terms guide If you follow the above steps and are still unable to correct the problem please cease using the projector unplug the projector from the electrical outlet and request repairs from your dealer or nearest address provided in the ...

Page 46: ...itched off and the projector is in cool down mode the Power button will not work Has a Sleep Mode interval 5 10 or 30 minutes been set When a Sleep Mode interval has been set the lamp cuts out after no operations have been carried out for the set time 5 10 or 30 minutes The power indicator lights orange at this time Menu button Setting Sleep Mode s Setting menu P 38 Has the image brightness been a...

Page 47: ...lay Resolutions P 66 No signal Has external video output been selected on the computer When using a laptop or a PC with an in built monitor select external video output on the computer s Laptop connection P 12 Is the input source properly selected Press the Source button on the Control panel until the correct input source is selected For the remote control press the Computer button or the S Video ...

Page 48: ...nt is connected select the appropriate setting for the video system you are using in the Setting Video Signal configuration menu Is the projector positioned at right angles to the screen s Installation method P 10 Is the projector at the correct distance from the screen The optimum range for projection is 87 1109cm 2 9 36 4ft Set the projector within this range s Installation method P 10 Are the f...

Page 49: ...n Image Picture Quality Sync s Image menu P 35 Are the image signal format settings correct When a computer or Component Videog equipment is connected select the appropriate setting for the input source you are using in the Image Input Signal configuration menu When Composite Videog or S Videog equipment is connected select the appropriate setting for the video system you are using in the Setting ...

Page 50: ...es of the connected computer s Control Panel the projector will only display about half of the image on the computer screen To display the whole of the image on the computer screen turn off the dual display setting Refer to the video driver manual for the computer s monitor for further details Has the correct resolution been selected Set the computer so that the signals that are output are compati...

Page 51: ...hen the lamp is due for replacement colours will weaken and the image will become dark Replace the lamp when this is the case s Lamp replacement period P 56 Has the image contrast been adjusted correctly Menu button Image Picture Quality Contrast s Image menu P 35 Has the colour been adjusted correctly Menu button Image Picture Quality Color Temperature s Image menu P 35 Has the saturation and tin...

Page 52: ...correctly Menu button Image Picture Quality Brightness s Image menu P 35 Has the image contrast been adjusted correctly Menu button Image Picture Quality Contrast s Image menu P 35 Is A V Mute activated The projector may be in A V Mute mode Press the A V Mute button on the remote control to cancel A V Mute s A V Mute P 28 Is the volume turned down to the minimum setting Menu button Setting Volume ...

Page 53: ...ately 30 horizontally and approximately 15 vertically s Operating range P 9 Has the battery insulating tape been removed s Before using the Remote Control P 9 Is the battery dead s Changing the battery Remote Control Presentation Remote Controller P 55 Is the battery inserted correctly Is the battery installed The power indicator remains orange This projector is designed so that the Power indicato...

Page 54: ...h dry before using it to wipe the projector case After you have done this wipe the projector another time with a soft dry cloth f Cleaning the lens Use a commercially available air blower or lens cleaning paper to gently wipe the lens c Be sure to read the separate Safety Instructions World Wide Warranty Terms before proceeding c Do not use volatile substances such as wax alcohol or thinner to cle...

Page 55: ...ge the projector Keeping the projector horizontal use a vacuum cleaner to clean away the dust from the air filter p If the air filter is difficult to clean or if it is broken it should be replaced Contact your dealer for a new air filter Spare lamps are provided with new air filters When replacing the lamp please replace the air filter at the same time ...

Page 56: ... the battery holder out B Remove the old battery and insert the new one Check the position of the mark inside the battery holder to ensure that the battery is inserted the correct way C Replace the battery holder Press the battery holder in until it clicks c Keep batteries away from children to avoid the risk of accidents If a child swallows the battery contact your doctor immediately p Please dis...

Page 57: ... the air filter to remove it p The replacement message will appear after about 1900 hours of use When this message is displayed please replace the lamp as quickly as possible The lamp may explode if you continue to use it beyond the lamp replacement period Some lamps may stop operating before the replacement message is displayed It is recommended that you have a replacement lamp ready in case this...

Page 58: ...e until it clicks into place p Install the lamp securely If the lamp cover is removed the lamp turns off automatically as a safety precaution The lamp will not turn on if the lamp or the lamp cover is not installed correctly After replacing the lamp be sure to reset the lamp operating time New air filters are included with replacement lamps The air filter should also be replaced when the lamp is r...

Page 59: ...int Therefore the counter needs to be reset from the configuration menu after the lamp has been replaced with a new one A Turn on the power and press the Menu button B Select Lamp Hours Reset from the Reset menu using the u d e buttons C Use the l r buttons to select Yes then press the e button The lamp operating time will be reset p Please do not reset the lamp operating time except when the lamp...

Page 60: ...about 20 seconds B Put your finger into the recess in the air filter hook and lift up the air filter to remove it C Replace the air filter with a new one Take out the old air filter and install the new one Please ensure there are no gaps between the air filter and the plastic grill D Replace the air filter cover First insert the tabs and then press down on the opposite side until it clicks into pl...

Page 61: ... ratio ELPSC07 60 screen A portable roll type screen 4 3 aspect ratio ELPSC08 80 screen ELPSC10 100 screen ELPKC02 VGA HD15 PC cable 1 8m 6ft for mini D Sub 15pin mini D Sub 15pin Use to connect the projector to a computer ELPKC09 VGA HD15 PC cable 3m 9 8ft for mini D Sub 15pin mini D Sub 15pin Use these extension cables if the provided computer cable is too short ELPKC10 VGA HD15 PC cable 20m 65 ...

Page 62: ...his installation method ELPMB11 Ceiling mount Use when installing the projector to a ceiling ELPFC03 Ceiling plate Use when installing the projector to a high ceiling or a ceiling with veneer panels ELPFP04 Pipe 370 370mm silver ELPFP05 Pipe 570 570mm silver ELPFP06 Pipe 770 770mm silver ELPDC02 ELPDC04 Multimedia viewer Use when projecting books OHP films and slides Part number Part name Use ...

Page 63: ... make text and graphics stand out or appear softer Adjusting this particular property of an image is called contrast adjustment Cool down The process used to cool down a projector lamp that is hot from use Cool down happens automatically when the Power button is pressed on the projector or on the remote control to turn the projector off Do not unplug the projector power cable whilst it is cooling ...

Page 64: ...produced by video equipment can be handled easily by computer operating systems OS and the Internet SVGA A type of video signal with a resolution of 800 horizontal 600 vertical dots which is used by IBM PC AT compatible computers S Video A type of video signal which has the video brightness and colour signal information separated in order to provide better image quality It refers to images which c...

Page 65: ... used in modern NTSC TV transmissions The name comes from the Y luminance signal and the CbCr chroma colour signals YPbPr The carrier signal contained in the colour bar signal used in high definition TV HDTV transmissions The name comes from the Y luminance signal and the PbPr colour difference signals ...

Page 66: ...tion Connector type D Sub 9 pin male Projector input port type RS 232C Projector Computer Projector PC serial cable Computer Signal name Function GND Signal line grounding TD Transmitting data RD Receiving data DSR Data set ready DTR Data terminal ready ...

Page 67: ... 800 600 SVGAg 56 60 72 75 85 iMac 800 600 800 600 XGAg 43i 60 70 75 85 iMac 1024 768 800 600 MAC13 640 480 800 600 MAC16 832 624 800 600 MAC19 1024 768 800 600 MAC21 1152 870 794 600 SDTVg 525i 60 640 480 800 600 SDTV 525p 60 640 480 800 600 HDTVg 750p 60 1280 720 800 450 HDTV 1125i 60 1920 1080 800 450 Signal Refresh Rate Hz Resolutions dots Aspect ratio 4 3 Aspect ratio 16 9 SDTV 525i D1 60 800...

Page 68: ... AS NZS 3548 1995 A1 1997 A2 1997 Class B CISPR Pub 22 1993 A1 1995 A2 1996 Class B Dimensions 370 W 106 H 265 D mm not including feet Panel Size 0 5 inches Display method Polysilicon TFT active matrix Resolution SVGAg 480 000 800 W 600 H dots 3 Focus adjustment Manual Zoom adjustment Digital Approx 1 1 2 Lamp light source UHP Lamp 132W Model No ELPLP25 Max audio output 1W monaural Speaker 1 Power...

Page 69: ...68 EMP S1 User s Guide Appearance 3 4 56 4 370 87 5 8 106 Distance from centre of lens to ceiling mount Centre of projector Centre of lens 114 80 12 265 45 5 127 115 82 5 3 M4 8 ...

Page 70: ...ter 54 Cleaning the lens 53 Cleaning the projector case 53 Color Mode 36 Color Temperature 37 Component Video 18 Composite Video 18 Computer cable 13 Computer Component Video port 6 Configuration Menus 31 Connecting to a Computer 12 Connecting to Video Equipment 18 Contrast 36 Control RS 232C port 6 Control panel 4 5 Cool down 22 42 D Display 39 E E Zoom 30 F Focus 23 Focus ring 4 23 Foot button 4...

Page 71: ...Power indicator 5 Power inlet 6 Presentation remote controller 15 Projecting in widescreen 29 Projection 38 Projection angle 24 Projection distance 10 R Remote Control 8 Remote control holder 6 Remote control infrared receiver 4 6 Remote control infrared transmitter Presentation remote controller 17 Remote control 8 Replacing the air filter 59 Replacing the lamp 56 Reset menu 41 Resized display 63...

Page 72: ...op Menu 32 Tracking 36 Translucent screen 11 Turning off the Projector 22 Turning on the Projector 20 V Ventilation outlet 4 Video 40 Video port 6 Video Signal displaying the Video signal 40 Selecting the Video signal 39 Volume 39 W Warning indicator 5 When You Suspect a Problem 42 Workstation 13 ...

Page 73: ...n accordance with the instructions may cause harmful interference to radio or television reception However there is no guarantee that interference will not occur in a particular installation If this equipment does cause interference to radio and television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more ...

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