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The LED also displays the following: • Message ( ) • HDTV • Power ( ) • Output Resolution (1080i, 720p, 480p, or 480i) • AUTO - Automatically outputs native scan rates that your TV can accept 5 Guide Accesses on-screen services, such as the on-screen guide, video-on-demand, or pay-per-view 6 Info Displays a description of the selected program. This button is available from the on-screen guide and while viewing a program 7 Exit Exits menus, the on-screen guide, and program information 8 Settings Provides access to the Settings menu 9 IR Sensor Receives the infrared signal from the remote control 10 Power Turns the set-top on and off 11 USB Port Connects to external equipment, such as a keyboard or mouse (reserved for future use) Welcome The Cisco Explorer 4540HDC (digital-only tuning) and 4550HDC (analog and digital tuning) set-tops deliver high-defi nition programming with exceptional picture and audio quality. Through the 4540HDC and 4550HDC you can also access interactive services, such as video-ondemand and pay-per-view programs. Contact your service provider for information about these and other available services. Use the instructions in this guide to install the 4540HDC or the 4550HDC and to access your program services. The consumer support website provides news and information about this product. For more information, please refer to catlanta.com/products/consumers/new_cableboxes.htm Safety First Before using this set-top, read the IMPORTANT SAFETY INSTRUCTIONS section of this guide. Watch TV Press the following remote control keys to access services and programs: • Guide–Display the on-screen program guide • Arrows–Highlight a program in the schedule • Info–Display program description • Select–Watch a specifi c program in the guide Avoid Screen Burn-In Images such as letterbox bars or side bars, bright closed-captioning backgrounds, station logos, or any other stationary images may cause the HDTV screen to age unevenly and cause damage to your HDTV. Refer to the user’s guide that came with your HDTV for more information about screen burn-in. Automatic Software Updates A message appears on the TV screen when the set-top and the Multi-Stream CableCARDTM (M-CardTM) module are receiving software updates. In addition, download information also appears on the front panel of the set-top during these updates. Wait for the current time to display on the front panel before continuing. When the time appears, the update is complete. Performance Tips If the set-top does not perform as expected, the following tips may help. No picture • Verify that the M-Card module is installed. • Verify that the power to your TV is turned on. • If the set-top is plugged into a wall switch, verify the switch is in the ON position. (Avoid plugging into an outlet that is controlled by a wall switch.) • Verify that all cables are properly connected. • The current channel may not be available in your service package. Try selecting another channel to see if a picture appears. No color • Verify that the HDTV is in HD mode. If necessary, re-run the HDTV Setup Wizard to select HD mode. • Verify the current TV program is broadcast in color. • Adjust the TV color controls. No sound • If your setup includes a VCR or stereo, verify that you have properly connected them to the set-top. • Verify the volume is turned up. • Verify the mute function is not on. Front Panel Features Back Panel Connections 1 Multi-Stream Slot for M-Card module, which decrypts subscription digital channels. This set-top will not operate correctly without CableCARD an M-Card module. Obtain an M-Card module from your service provider 2 Cable In Connects to a coaxial cable that delivers the signal from your service provider 3 Cable Out Connects to a coaxial cable that sends analog audio and video signals to a TV or VCR. These signals are standard-defi nition TV (SDTV) video and stereo audio 4 Audio Out Connects to RCA cables that send analog audio signals (left and right) to the stereo inputs on a TV (Left, Right) 5 HDTV (PrPbY/V) Connects to the component video input (YPbPr) on the HDTV, when in HD mode 6 Digital Audio Out Connects to an RCA cable that sends a digital audio signal to a surround-sound receiver or other digital audio device 7 Out 2 (Secondary Connects to either a VCR or to another set of inputs (composite) on your TV Video/Audio Out) 8 IR Connector reserved for future use 9 S-Video Out Connects to an S-Video cable that sends an S-Video signal to your TV or VCR. This signal is standard defi nition, but higher quality than other SDTV connections 10 Optical Audio Connects to an optical cable that sends a digital audio signal to a surround-sound receiver or other digital audio device Output 11 HDMI Connects an HDMITM cable to the HDMI input of an HDTV. HDMI supports both digital audio and video. May be used to connect to a DVI interface using an HDMI-to-DVI adaptor for video and separate audio connections. Any of the following audio connectio...

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