Copyright This publication, including all photographs, illustrations and software, is protected under international copyright laws, with all rights reserved. Neither this manual, nor any of the material contained herein, may be reproduced without written consent of the author. © Copyright 2011 Disclaimer The information in this document is subject to change without notice.
User’s Manual Important Safety Information Important: It is strongly recommended that you read this section carefully before using the projector. These safety and usage instructions will ensure that you enjoy many years of safe use of the projector. Keep this manual for future reference. Symbols Used Warning symbols are used on the unit and in this manual to alert you of hazardous situations. The following styles are used in this manual to alert you to important information.
Preface Projector Installation Notice ¾ Place the projector in a horizontal position The tilt angle of the projector should not exceed 15 degrees, nor should the projector be installed in any way other than the desktop and ceiling mount, otherwise lamp life could decrease dramatically. ¾ Allow at least 50 cm (19.69 inch) clearance around the exhaust vent. (19.69 inch) (19.69 inch) (19.69 inch) (3.94 inch) (11.81 inch) (19.
User’s Manual Replacing the Lamp Replacing the lamp can be hazardous if done incorrectly. See Replacing the Projection Lamp on page 39 for clear and safe instructions for this procedure. Before replacing the lamp: ¾ Unplug the power cord. ¾ Allow the lamp to cool for about one hour. Cleaning the Projector ¾ Unplug the power cord before cleaning. See Cleaning the Projector on page 42. ¾ Allow the lamp to cool for about one hour.
Preface Table of Contents GETTING STARTED........................................................................................................................................................... 1 PACKING CHECKLIST ........................................................................................................................................................... 1 VIEWS OF PROJECTOR PARTS ................................................................................................................
User’s Manual AUDIO PROBLEMS ............................................................................................................................................................. 46 HAVING THE PROJECTOR SERVICED .................................................................................................................................. 46 HDMI Q & A ...................................................................................................................................................
IN5316HD/IN5318 – User’s Manual GETTING STARTED Packing Checklist Carefully unpack the projector and check that the following items are included: DLP PROJECTOR REMOTE CONTROL (BATTERIES NOT INCLUDED) VGA CABLE CD-ROM (THIS USER’S MANUAL) POWER CORD (VARIES PER COUNTRY) REGISTRATION CARD QUICK START GUIDE WARRANTY BOOKLET Safe ty Bo ok let SAFETY BOOKLET Contact your dealer immediately if any items are missing, appear damaged, or if the unit does not work.
User’s Manual Views of Projector Parts Front-angled View ITEM LABEL DESCRIPTION SEE PAGE: 7 1. IR receiver Receives the IR signals from the remote control 2. Lens Projection Lens 3. Focus ring Focuses the projected image 4. Zoom ring Enlarges the projected image 5. Elevator foot Adjusts level of projector 6. Function keys See Top view—On-screen Display (OSD) buttons. 7. Lamp cover Remove cover to replace lamp 39 8.
IN5316HD/IN5318 – User’s Manual Top view—On-screen Display (OSD) buttons ITEM LABEL DESCRIPTION 1. MENU Open and exit OSD menus 2. ◄ (Left cursor) 3. ▲ (Up cursor) 4. ▼ (Down cursor) 5. ► (Right cursor) Navigate and change settings in the OSD Quick Menu – For Volume Navigate the OSD Quick Menu – For Keystone Navigate the OSD Quick Menu – For Keystone Navigate and change settings in the OSD Quick Menu – For Volume 6.
User’s Manual Rear view 1 2 3 17 18 19 4 5 6 20 21 22 24 25 26 23 7 8 9 10 11 12 13 14 15 16 ITEM LABEL DESCRIPTION SEE PAGE: 1. DC 12V TRIGGER Connect a 12V screen trigger (200ma max) 2. AUDIO OUT Connect an AUDIO CABLE to an external speaker system 3. AUDIO3 (L and R) Connect the AUDIO CABLE from an input device 4. VIDEO Connect the COMPOSITE CABLE from a video device 5. S-VIDEO Connect the S-VIDEO CABLE from a video device 6.
IN5316HD/IN5318 – User’s Manual 17. USB Connect the USB CABLE from a computer (used for presentation slide control with the projector remote) 18. DISPLAYPORT Connect a DISPLAYPORT CABLE to a DISPLAYPORT source 19. HDMI Connect the HDMI CABLE from an HDMI device 20. VGA2 Connect the RGB CABLE from a computer or a video enabled device 21. RJ45 Connect a LAN CABLE for networking purposes 22. READY LED 23. TEMP LED 24.
User’s Manual Bottom view ITEM LABEL DESCRIPTION SEE PAGE: 1. Leveling/Elevator Feet Raise and rotate the feet to change and fine tune the angle of the projector. 2. Ceiling support holes Only use with an InFocus ceiling mount system (p/n PRJ-MNT-UNIV). See your InFocus dealer or go to www.infocusstore.com. 14 Note: When installing, ensure that you use only UL Listed ceiling mounts. For ceiling installations, use approved mounting hardware and M4 screws with a maximum screw depth of 6 mm (0.
IN5316HD/IN5318 – User’s Manual Remote Control Parts Important: 1. Avoid using the projector with bright fluorescent lighting turned on. Certain high-frequency fluorescent lights can disrupt remote control operation. 2. Be sure nothing obstructs the path between the remote control and the projector. If the path between the remote control and the projector is obstructed, you can bounce the signal off certain reflective surfaces such as projector screens. 3.
User’s Manual ITEM 1. 2. 3. 4. LABEL DESCRIPTION SEE PAGE: 12 Power ON Turn the projector on LED indicator Only lights when the remote keys are pressed Display Mode Choose a suitable preset mode for usage environment Contrast Display the Contrast setting bar and use the right and left keys to adjust 5. Brightness Display the Brightness setting bar and use the right and left keys to adjust. 6. Left cursor When the OSD is displayed, this button navigates to the left.
IN5316HD/IN5318 – User’s Manual SETUP AND OPERATION Inserting the Remote Control Batteries 1. Remove the battery compartment cover by sliding the cover in the direction of the arrow. 2. Insert the batteries (not included) as shown in the illustration. 3. Replace the cover. Caution: 1. Only use AA batteries (Alkaline batteries are recommended). 2. Dispose of used batteries according to local ordinance regulations. 3. Remove the batteries when not using the projector for prolonged periods. 4.
User’s Manual Installing or Removing the Optional Lens Caution: y Do not shake or place excessive pressure on the projector or the lens components as the projector and lens components contain precision parts. y Before removing or installing the lens, be sure to turn off the projector, wait until the cooling fans stop, and turn off the main power switch. y Do not touch the lens surface when removing or installing the lens. y Keep fingerprints, dust or oil off the lens surface.
IN5316HD/IN5318 – User’s Manual Installing the New Lens 1. Align the notches and correctly position the electrical contact pad as shown in the picture. Note: Pin of IRIS should be in the direction as shown in the picture. 2. Rotate the lens clockwise until you feel it click into place.
User’s Manual Starting and Shutting down the Projector 1. Remove the lens cap. 2. Connect the power cord to the projector. Connect the other end to a wall outlet. Verify that the AC Power switch on the back of the unit is turned on. When connected, the PWR LED will turn solid Red. 3. Turn on the lamp by pressing the “ ” button on the rear of the projector or the Power On button on the remote. The PWR LED will now solid Green. The startup screen will display in approximately 30 seconds.
IN5316HD/IN5318 – User’s Manual 4. If more than one input device is connected, press the SOURCE button and use ▲▼ to scroll among devices. • VGA 1 : Analog RGB • VGA 2 : Analog RGB • BNC : Analog / serial digital interface video inputs • HDMI : High Definition Multimedia Interface (HDMI) • DISPLAYPORT : DISPLAYPORT input • Component Video: DVD input YCbCr / YPbPr, or HDTV input YPbPr via HD15 connector 5.
User’s Manual Adjusting the Projector Level Take note of the following when setting up the projector: • The projector table or stand should be level and sturdy. • Position the projector so that it is perpendicular to the screen. • Remove and discard the foam spacers on the rear leveling feet before adjusting the projection angle. • Ensure the cables are in a safe location. You could trip over them. 1. To raise the level of the projector, twist the leveling feet clockwise. 2.
IN5316HD/IN5318 – User’s Manual Adjusting Projected Image Position Using Shift The Shift feature provides a lens shift function that can be used to adjust the position of the projected image either horizontally or vertically within the range detailed below. Shift is a unique system that provides lens shift while maintaining a much higher ANSI contrast ratio than traditional lens shift systems.
User’s Manual Adjusting the horizontal image position With the lens in the center position the horizontal image position can be adjusted to the left or right by up to a maximum of 5% of the image width. Note that the maximum horizontal image height adjustment can be limited by the vertical image position. For example it is not possible to achieve the maximum horizontal image position if the vertical image position is at maximum. Please consult the Shift Range diagram below for further clarification.
IN5316HD/IN5318 – User’s Manual Adjusting Zoom, Focus and Keystone 1. Use the Zoom ring to resize the projected image and screen size. 2. Use the Focus ring to sharpen the projected image. 3. Use the KEYSTONE buttons (on the projector or the remote control) to correct image trapezoiding (wider top or bottom). Remote control and OSD panel 4. The keystone control appears on the display.
User’s Manual Adjusting the Volume 1. Press the Volume buttons (on the projector or the remote control). The volume control appears on the display. 2. Use the Vol +/- buttons (on the projector or the remote control). 3. Press the MUTE button to turn off the audio (This feature is only available on the remote).
IN5316HD/IN5318 – User’s Manual ON-SCREEN DISPLAY (OSD) MENU SETTINGS OSD Menu Controls The projector has an OSD that lets you make image adjustments and change various settings. Navigating the OSD You can use the remote control cursor buttons or the projector keypad to navigate and make changes to the OSD. 1. To enter the OSD, press the MENU button. 2. There are six menus. Press the cursor ◄► button to move through the menus. 3. Press the cursor ▲▼ button to move up and down in a menu. 4.
User’s Manual Setting the OSD Language Set the OSD language to your preference before continuing. 1. Press the MENU button. Press the cursor ◄► button to navigate to SETUP>>Basic. 2. Press the cursor ▲▼ button until Language is highlighted. 3. Press the cursor ◄► button until the language you want is selected. 4. Press the MENU button to close the OSD.
IN5316HD/IN5318 – User’s Manual OSD Menu Overview Use the following illustration to quickly find a setting or determine the range for a setting.
User’s Manual PICTURE>>Basic Menu Press the MENU button to open the OSD menu. Press the cursor ◄► button to move to the PICTURE>>Basic menu. Press the cursor ▲▼ button to move up and down in the PICTURE>>Basic menu. Press ◄► to change values for settings. Note: Customizing the settings in PICTURE>>Basic menu is only available in User 1/ 2/ 3 mode. ITEM DESCRIPTION Display Mode Press the cursor ◄► buttons to set the Display Mode.
IN5316HD/IN5318 – User’s Manual PICTURE>>Advanced Menu Press the MENU button to open the OSD menu. Press the cursor ◄► button to move to the PICTURE>>Advanced menu. Press the cursor ▲▼ button to move up and down in the PICTURE>>Advanced menu. Press ◄► to change values for settings. ITEM DESCRIPTION Noise Reduction Press the cursor ◄► button to adjust the Noise Reduction. Color Temperature Press the cursor ◄► button to set the Color Temperature.
User’s Manual HSG Adjustment Press the ENTER/SELECT button to enter the HSG Adjustment sub menu. ITEM DESCRIPTION Primary Color Press the ◄► buttons to set the Primary Color. Notes: There are six colors (R/ G/ B/ C/ M/ Y) to be customized. Hue Press the ◄► buttons to adjust the Hue. Saturation Press the ◄► buttons to adjust the Saturation. Gain Press the ◄► buttons to adjust the Gain.
IN5316HD/IN5318 – User’s Manual DISPLAY Menu Press the MENU button to open the OSD menu. Press the cursor ◄► button to move to the DISPLAY menu. Press the cursor ▲▼ button to move up and down in the DISPLAY menu. Press ◄► to change values for settings. ITEM DESCRIPTION Aspect Ratio Press the cursor ◄► button to set the Aspect Ratio. (Range: Auto/ 16:10/ 16:9/ 4:3/ Letter Box/ Real) Keystone Press the cursor ◄► button to adjust the Keystone.
User’s Manual PC Detail Adjustment Press the ENTER/SELECT button to enter the PC Detail Adjustment sub menu. Note: Customizing the settings in PC Detail Adjustment menu is only available when PC input source (analog RGB) is selected. ITEM DESCRIPTION Auto Press the RE-SYNC button on the projector keypad or the AUTO IMAGE button on the remote control to automatically adjust frequency, phase, and position. Frequency Press the ◄► buttons to adjust the A/D sampling number.
IN5316HD/IN5318 – User’s Manual SETUP>>Basic Menu Press the MENU button to open the OSD menu. Press the cursor ◄► button to move to the SETUP>>Basic menu. Press the cursor ▲▼ button to move up and down in the SETUP>>Basic menu. Press ◄► to change values for settings. ITEM Language DESCRIPTION Press the cursor ◄► buttons to select a different localization menu.
User’s Manual Menu Settings Press the ENTER/SELECT button to enter the Menu Settings sub menu. ITEM DESCRIPTION Menu Position Press the ◄► buttons to select from five OSD locations: Top-Left/ Top-Right/ Center/ Bottom-Left/ Bottom-Right. Menu Display Time Press the ◄► buttons to set the Menu Display timer before the OSD times out.
IN5316HD/IN5318 – User’s Manual Source Press the ENTER/SELECT button to enter the Source sub menu. ITEM VGA 1 DESCRIPTION Press the ◄► buttons to enable or disable the VGA source. VGA 2 HDMI Press the ◄► buttons to enable or disable the HDMI source. DisplayPort Press the ◄► buttons to enable or disable the DisplayPort source. RGBHV Press the ◄► buttons to enable or disable the RGBHV source. Component Press the ◄► buttons to enable or disable the Component source.
User’s Manual Lan Control Settings Press the ENTER/SELECT button to enter the Lan Control Settings sub menu. ITEM DESCRIPTION Control By Press the ◄► buttons to select projector remote command control. (Range: RS232/ RJ45) Note: this setting changes the standby power: RS232 <1W (Default) RJ45 <9W Network State Press the ENTER/SELECT button to enter the Network State sub menu. See below. Network State ITEM Network State DESCRIPTION Displays the network connection status.
IN5316HD/IN5318 – User’s Manual For simplicity and ease of operation, the projector provides diverse networking and remote management features. The LAN/RJ45 feature allows the projector to be connected to a network and remotely managed. Available remote management controls include: Power On/Off, Video-Source, Brightness and Contrast settings, SoundMute, etc. Enter the Projector IP address shown in the SETUP >> Basic >> Lan Control Setting >> Network State menu. Note: DHCP must be on.
User’s Manual Preparing Email Alerts 1. Make sure that user can access the homepage of LAN RJ45 function by web browser (for example, Microsoft Internet Explorer v6.01/v8.0). 2. From the Homepage of LAN/RJ45, click Alert Mail Settings. 3. By default, the input boxes in Alert Mail Settings are blank. 4. To setup email alerts, input the following: The SMTP field is the mail server for sending out email (SMTP protocol). This is a required field.
IN5316HD/IN5318 – User’s Manual This is an optional field (for example, the projector administrator’s assistant). The From field is the sender’s email address (for example, the projector administrator). This is a required field. Select the alert conditions by checking the desired boxes. Note: Fill in all fields as specified. Select the desired alert condition and click Submit to conduct an Email Alert Test. A successful test alerts the designated email accounts.
User’s Manual SETUP>>Advanced Menu Press the MENU button to open the OSD menu. Press the cursor ◄► button to move to the SETUP>>Advanced menu. Press the cursor ▲▼ button to move up and down in the SETUP>>Advanced menu. ITEM DESCRIPTION Audio Press the ENTER/SELECT button to enter the Audio sub menu. See Audio on page 35. Lamp Press the ENTER/SELECT button to enter the Lamp sub menu. See Lamp on page 35. HDMI Press the ENTER/SELECT button to enter the HDMI sub menu. See HDMI on page 36.
IN5316HD/IN5318 – User’s Manual Audio Press the ENTER/SELECT button to enter the Audio sub menu. ITEM DESCRIPTION Volume Press the ◄► buttons to adjust the audio Volume. Treble Press the ◄► buttons to adjust the audio Treble. Bass Press the ◄► buttons to adjust the audio Bass. Mute Press the ◄► buttons to turn on or off the internal and external speakers. AGC Press the ◄► buttons to turn on or off the Automatic Gain Control setting.
User’s Manual Lamp Press the ENTER/SELECT button to enter the Lamp sub menu. ITEM DESCRIPTION Lamp Mode Press the ◄► buttons to adjust lamp brightness. Reset Lamp Timer Press the ENTER/SELECT button to reset the Lamp Hour after the lamp is replaced. Lamp Hour Displays the number of hours the lamp has been in use. HDMI Press the ENTER/SELECT button to enter the HDMI sub menu.
IN5316HD/IN5318 – User’s Manual Closed Caption Press the ENTER/SELECT button to enter the Closed Caption sub menu. ITEM DESCRIPTION Closed Caption Enable Press the ◄► buttons to turn on or off Closed Caption. Caption Version Press the ◄► buttons to select the Caption Version. Presentation Timer The Presentation Timer function can indicate the presentation time on the screen to help you achieve better time management when giving presentations.
User’s Manual STATUS Menu Press the MENU button to open the OSD menu. Press the cursor ◄► button to move to the STATUS Menu. ITEM DESCRIPTION Source Displays the activated input source. Resolution Displays the native resolution of input source. Lamp Hour Displays the number of hours the lamp has been in use. Firmware Version Displays the firmware version of the projector. Note: Status displayed in this menu is for viewing only and cannot be edited.
IN5316HD/IN5318 – User’s Manual MAINTENANCE AND SECURITY Replacing the Projection Lamp The projection lamp should be replaced when it burns out. Be sure to use the InFocus lamp module designed for this projector. You can order new lamps from www.infocusstore.com (in select areas), your retailer or your dealer. Only genuine InFocus lamps are tested for use in this projector. Use of non InFocus lamps may cause electrical shock and fire, and may void the projector warranty.
User’s Manual 4. Loosen the captive screw on the lamp cover. 5. Pull up and remove the cover. 6. Use a screwdriver to remove the two captive screws from the lamp module. 7. Pull out the lamp module.
IN5316HD/IN5318 – User’s Manual 8. Reverse steps 1 to 7 to install the new lamp module. While installing, align the lamp module with the connector and ensure it is level to avoid damage. Note: The lamp module must sit securely in place and the lamp connector must be connected properly before tightening the screws. 9. Turn on the projector and reset the lamp after the lamp module is replaced. Lamp Reset: a) Press the Menu button and select the SETUP>>Advanced menu.
User’s Manual Cleaning the Projector Cleaning the projector to remove dust and grime will help ensure trouble-free operation. Warning: 1. Be sure to turn off and unplug the projector at least 60 minutes before cleaning. Failure to do so could result in a severe burn. 2. Use only a dampened cloth when cleaning. Do not allow water to enter the ventilation openings on the projector. 3.
IN5316HD/IN5318 – User’s Manual TROUBLESHOOTING Common Problems and Solutions These guidelines provide tips to deal with problems you may encounter while using the projector. If the problem remains unsolved, contact InFocus at www.infocus.com/support. Often the problem is traced to something as simple as a loose connection. Check the following before proceeding to problem-specific solutions. • Use another electrical device to confirm that the electrical outlet is working.
User’s Manual LED Error Messages PWR LED ERROR CODE MESSAGES READY LED TEMP LED Green Red Red Red Standby — ON — — Start-up/Cool Down ON — flashing — Overheating — — — ON Thermal Break Sensor error — 7 blinks — — Lamp Error 5 blinks — — — Burner Fan error 6 blinks — 1 blinks — System Fan error 6 blinks — 2 blinks — Power and Ballast Fan error 6 blinks — 3 blinks — Case Open — 7 blinks — — DMD error 8 blinks — — — Color wheel error 9 blinks — — —
IN5316HD/IN5318 – User’s Manual Problem: The image is flat with no contrast Adjust the Contrast setting in the PICTURE >> Basic menu of the OSD. Problem: The color of the projected image does not match the source image. Adjust the Color Temperature and Gamma settings on the PICTURE >> Advanced menu of the OSD. Lamp Problems Problem: There is no light from the projector 1. Check that the power cable is securely connected. 2. Ensure the power source is good by testing with another electrical device. 3.
User’s Manual Audio Problems Problem: There is no sound 1. Adjust the volume on the remote control. 2. Adjust the volume of the audio source. 3. Check the audio cable connection. 4. Disconnect audio out cable. 5. Test the source audio output with other speakers. 6. Have the projector serviced. Problem: The sound is distorted 1. Check the audio cable connection. 2. Test the source audio output with other speakers. 3. Have the projector serviced.
IN5316HD/IN5318 – User’s Manual HDMI Q & A Q. What is the difference between a “Standard” HDMI cable and a “High-Speed” HDMI cable? Recently, HDMI Licensing, LLC announced that cables would be tested as Standard or HighSpeed cables. ˙Standard (or “category 1”) HDMI cables have been tested to perform at speeds of 75Mhz or up to 2.25Gbps, which is the equivalent of a 720p/1080i signal. ˙High Speed (or “category 2”) HDMI cables have been tested to perform at speeds of 340Mhz or up to 10.
User’s Manual SPECIFICATIONS Specifications Model Display type Native Resolution Projection distance (standard lens) Projection screen size (standard lens) Projection lens Zoom ratio (standard lens) Vertical keystone correction Projection methods IN5316HD IN5318 TI DMD 1080P 0.65” TI DMD WUXGA 0.67” 1920x1080 1920x1200 1.5 meters ~ 7 meters ( 4.92 ft ~ 22.97 ft ) 35.1”~205” (89cm~521cm) 36.1”~211”(92cm~536cm) Manual Focus/Manual Zoom 1.
IN5316HD/IN5318 – User’s Manual A Image Height Projection Distance vs. Projection Size (1080P) Projection Distance Projection Distance and Size Table Standard projection lens: TR: 1.54– 1.93; offset=10% IN5316HD Distance (m/inch) Diagonal (inch/ft) Image Height (mm/inch) Image Width (mm/inch) A (Offset -mm/inch) TELE 1.71/ 67.3 40/3.3 498/ 19.6 886/ 34.9 50/2 3.42/ 134.6 80/6.7 996/ 39.2 1771/ 69.7 100/3.9 WIDE 4.27/ 168.2 100/8.3 1245/ 49 2214/ 87.2 125/4.9 8.55/ 336.4 200/16.7 2491/ 98.
User’s Manual A Image Height Projection Distance vs. Projection Size (WUXGA) Projection Distance Projection Distance and Size Table Standard projection lens: TR: 1.54–1.93; offset=5% IN5318 TELE WIDE Distance (m/inch) 1.66/65.5 3.33/130.9 4.16/163.7 8.31/327.3 1.66/65.3 3.32/130.6 6.63/261.2 9.95/391.8 Diagonal (inch/ft) 40/3.3 80/6.7 100/8.3 200/16.7 50/4.2 100/8.3 200/16.7 300/25 538/21.2 1077/42.4 1346/53 2692/106 673/26.5 1346/53 2692/106 4039/159 862/33.9 1723/67.
IN5316HD/IN5318 – User’s Manual Timing Mode Table The projector can display several resolutions. The following table outlines the resolutions that can be displayed by the projector. VGA 1/2 H-SYNC V-SYNC COMPOSITE / HDMI DP /RGBHV (KHZ) (HZ) S-VIDEO (DIGITAL) (DIGITAL) (ANALOG) SIGNAL RESOLUTION NTSC — 15.734 60.0 O — — — PAL/SECAM — 15.625 50.0 O — — — 720 x 400 37.9 85.0 — O O O 640 x 480 31.5 60.0 — O O O 640 x 480 37.9 72.8 — O O O 640 x 480 37.5 75.
User’s Manual SIGNAL HDTV RESOLUTION VGA 1/2 H-SYNC V-SYNC COMPOSITE / HDMI DP /RGBHV (KHZ) (HZ) S-VIDEO (DIGITAL) (DIGITAL) (ANALOG) 720p 37.5 50.0 — O O O 720p 45.0 60.0 — O O O 1080i 33.8 60.0 — O O O 1080i 28.1 50.0 — O O O 1080p 27 24.0 — O O O 1080p 28.13 25.0 — O O O 1080p 33.75 30.0 — O O O 1080p 67.5 60.0 — O O O 1080p 56.3 50.
IN5316HD/IN5318 – User’s Manual Projector Dimensions – 53 –
User’s Manual REGULATORY COMPLIANCE FCC Warning This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
