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IMPORTANT SAFETY INSTRUCTIONS

Read These Instructions

Keep These Instructions

Heed All Warnings

Follow All Instructions

Power Source Warning

A label on this product indicates the correct power source 
for this product. Operate this product only from an electrical 
outlet with the voltage and frequency indicated on the product 
label. If you are uncertain of the type of power supply to your 
home or business, consult your service provider or your local 
power company.

The AC inlet on the unit must remain accessible and operable 
at all times.

Ground the Product

 WARNING: Avoid electric shock and fire 

hazard! Do not defeat the safety purpose of the 
polarized or grounding-type plug. A polarized plug 
has two blades with one wider than the other. A 
grounding-type plug has two blades and a third 
grounding prong. The wide blade or the third prong 
is provided for your safety. If the provided plug does 
not fit into your outlet, consult an electrician for 
replacement of the obsolete outlet.

If this product connects to coaxial cable wiring, be sure the 
cable system is grounded (earthed). Grounding provides some 
protection against voltage surges and built-up static charges.

Outdoor Grounding System

If this product connects to an outdoor antenna or cable system, 
be sure the antenna or cable system is grounded (earthed). 
This provides some protection against voltage surges and 
built-up static charges.

Article 810 of the National Electric Code (NEC) ANSI/NFPA 
No. 70-1990, provides the following information:

•  Grounding of the mast and supporting structure

•  Grounding the lead-in wire to an antenna discharge unit

•  Size of the grounding conductors

•  Location of the antenna-discharge unit

•  Connection to grounding electrodes

•  Requirements for the grounding electrodes (see the 

following antenna grounding diagram as recommended
by NEC ANSI/NFPA 70)

 WARNING: Avoid electric shock and fire 

hazard! Do not locate an outside antenna system in
the vicinity of overhead power lines or power circuits.
Touching power lines or circuits might be fatal. 

Protect the Product from Lightning

For added protection, unplug this apparatus during lightning 
storms or when unused for long periods of time. In addition to 
disconnecting the AC power from the wall outlet, disconnect 
the signal inputs.  

Verify the Power Source from the On/Off 

Power Light

When the on/off power light is not illuminated, the apparatus 
may still be connected to the power source. The light goes 
out when the apparatus is turned off, regardless of whether it 
is still plugged into an AC power source. 

Eliminate AC Mains Overloads

 WARNING: Avoid electric shock and fire 

hazard! Do not overload AC mains, outlets, extension 
cords, or integral convenience receptacles. For 
products that require battery power or other power 
sources to operate them, refer to the operating 
instructions for those products.

Summary of Contents for Explorer 4250HD

Page 1: ...User Guide Explorer 4250HD Home Gateway...

Page 2: ...of the NEC or Canadian Electrical Code Part 1 which provides guidelines for proper grounding of the coaxial cable shield CAUTION To reduce the risk of electric shock do not remove cover or back No use...

Page 3: ...t Panel Features 5 Back Panel Connectors 6 Connecting the 4250HD 7 Connections for a HDTV and VCR 8 Connections for a Standard Definition TV and VCR 10 Performance Tips 11 Automatic Software Updates 1...

Page 4: ...some protection against voltage surges and built up static charges Article 810 of the National Electric Code NEC ANSI NFPA No 70 1990 provides the following information Grounding of the mast and supp...

Page 5: ...ric shock and fire hazard Never push objects through the openings in this product Foreign objects can cause electrical shorts that can result in electric shock or fire Accessories Warning WARNING Avoi...

Page 6: ...product visit our website http www cisco com web consumer support index html Explorer 4250HD Home Gateway Serial Number To find the serial number for your 4250HD look on the back for a label that is...

Page 7: ...p 480p 480i AUTO Automatically outputs native scan rates that your TV can accept 7 GUIDE Accesses on screen services such as the on screen guide video on demand or pay per view 8 INFO Displays a descr...

Page 8: ...A V receiver 6 Video Out and Connects to a standard TV or VCR with an RCA cable to send analog video and Audio Out audio signals to a standard TV or VCR This signal is SDTV 7 S Video Out Connects an S...

Page 9: ...iption of the connectors and see the end of this guide for connection diagrams If you are using an SDTV see page 10 for a description of the connectors and see the end of this guide for connection dia...

Page 10: ...480p 720p 1080i that will match the full capabilities of your HDTV Some HDTVs have only RGB connectors If you have one of these HDTVs you need an RGB adaptor Check with your cable service provider fo...

Page 11: ...Right on the 4250HD See page 16 for an example For VCRs that have an S Video and Left and Right audio connectors you can use the S Video Out and the Out 2 Left and Right connectors on the 4250HD VCR...

Page 12: ...ee page 18 for an example Note To connect PrPbY V to an SDTV you must set the HD Setup Wizard on the 4250HD to HD Mode and select the output video format typically only 480i that will match the capabi...

Page 13: ...hannel may not be available in your service package Try selecting another channel to see if video is available No Color Verify that the current TV program is broadcast in color Adjust the TV color con...

Page 14: ...play a specific program description either from the on screen guide or while viewing a program Select View a specific program in the guide Avoid Screen Burn In Images such as letterbox bars or side ba...

Page 15: ...configuration prevents your home theater system or Dolby Digital decoder from providing the full Dolby Digital surround sound effect On the 4250HD you may override the automatic selection of audio by...

Page 16: ...audio connection for the left right analog ports or the digital audio out whichever matches the input formats that your TV accepts 1394 1394 T11837 4250HD DVI HDCP IN DVI HDCP IN AUDIO IN DVI HDCP AUD...

Page 17: ...HDTV With Component Input PrPbY V 1394 1394 4250HD DVI DVI Back of Typical HDTV T11488 Cable Input WARNING Electric shock hazard Unplug all electronic devices before con necting or disconnect ing any...

Page 18: ...IN 1 VIDEO FROM VCR L R AUDIO FROM VCR L R MONITOR AUDIO OUT L R RECORD AUDIO OUT LOUDSPEAKER OUTPUTS Back of Home Theater Receiver T11490 Cable Input Connecting the 4250HD to a Home Theater System Wi...

Page 19: ...k of Stereo VCR RF OUT RF IN R L AUDIO IN VIDEO IN R L AUDIO OUT VIDEO OUT Back of DVD Player L R VIDEO OUT AUDIO OUT DIGITAL AUDIO OUT T11832 Cable Input Connecting the 4250HD to a Stereo VCR DVD Pla...

Page 20: ...DTV RIGHT IN OUT LEFT AUDIO IN OUT VIDEO IN OUT T11838 Cable Input Note See Connections for a Standard Definition TV and VCR on page 10 regarding setting the 4250HD to SD mode Note The 4250HD must be...

Page 21: ...DTV set are crisp and clear noticeably better than on a standard analog television set using an antenna to receive over the air signals or on a cable ready TV connected without a digital set top What...

Page 22: ...er viewing preferences What is the Screen Resolution and Scan Rate The screen resolution indicates the amount of detail that the picture displays Resolution is identified by the number of display line...

Page 23: ...rvice provider for any questions you may have re garding the operation or installation of this device Declaration of Conformity This device complies with Part 15 of FCC Rules Operation is subject to t...

Page 24: ...Dolby is a trademark of Dolby Laboratories HDMI the HDMI logo and High Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC Macrovision is a registered tradema...

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