Which is the maximum length for HDMI cable?

panais

panais

Power User
Which is the maximum length for using the HDMI cable?
Ok what i want to do is...
I will like to connect my PC
Graphic card Ati Radeon 3870x2 with my
HDTV Samsung LE40A656F1 1080p 100Hz LCD 50,000:1
Both are 1080p capable and they have HDMI.
But they are in separate rooms,the distance from pc to tv is 50ft long.
1)Is there any problem to use 50ft long HDMI cable?
2)Is there any <<special>> HDMI cable for 1080p?
3)Which is the best brand for the best results?
4)How do i know if my HDMI cable is 1080p capable?
(The main usage for my pc is gaming in 1920x1080 resolution and watching HD movies)
I forgot to write that i already have 1 connected tv in my graphic card and i want to connect a SECOND tv in the SECOND hdmi of my card.
Is that ok? i will find any problems in picture quality,sound or anything else?
The purpose of all this is to play(1920x1080) games in my room,and watch 1080p movies in the living room.
How i enable the second tv view in my card?
(Btw i found a 15metres HQ hdmi cable) is that a good brand?
 
Last edited:

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Cable length
The HDMI specification does not define a maximum cable length, but because of signal attenuation there is an upper limit to how long HDMI cables can be made.[44] The length of the HDMI cable made depends on the construction quality and materials that were used.[44] The signal attenuation and intersymbol interference which is caused by long cables can be compensated by using adaptive equalization.

HDMI 1.3 has defined two categories of cables: Category 1 certified cables which have been tested at 74.5 MHz (1080i/720p) and Category 2 certified cables which have been tested at 340 MHz (1600p) to reduce the confusion about which cables support which video formats.[45] A Category 1 HDMI cable will be marketed as a "Standard HDMI cable" and a Category 2 HDMI cable will be marketed as a "High Speed HDMI cable".[1] This labeling guideline for HDMI cables went into effect on October 17, 2008.[46][47] Category 1 and 2 cables can either meet the required parameter specifications for inter-pair skew, far-end crosstalk, attenuation, and differential impedance or they can meet the required non-equalized/equalized eye diagram requirements.[45] A cheaply made cable of about 5 meters (16 ft) can be manufactured to Category 1 specifications using 28 AWG conductors.[44] With better quality construction and materials (24 AWG conductors) an HDMI cable can reach lengths of up to 15 meters (49 ft).[44] The HDMI website has stated that many HDMI cables under 5 meters of length that were made before the HDMI 1.3 specification can work as a Category 2 cable but cautions that only Category 2 tested cables are guaranteed to work.[48] Long cable lengths can cause instability of HDCP and blinking on the screen due to the weakened DDC signal which HDCP requires. HDCP DDC signals must be multiplexed with TMDS video signals to be compliant with HDCP requirements for HDMI extenders based on a single Category 5/Category 6 cable.[49][50] Several companies offer amplifiers, equalizers, and repeaters that can string several standard HDMI cables together. Active HDMI cables use electronics within
Click to expand...

Source:- High-Definition Multimedia Interface - Wikipedia, the free encyclopedia
 

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Hi panais,

See the following article: High-Definition Multimedia Interface - Wikipedia, the free encyclopedia. Note that the section Cable length does not state a maximum cable length, however it does mention the connection between cable length and signal degradation. Higher quality cables can be used for longer runs than cheaper ones, but there is still an unspecified limit to the length of cable that can be used without loss of data quality. For possible solutions, see the related links within the forementioned article.
 

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Hi panais, 50,000:1 is very impressive!

50ft is not long at all, if 500ft then you may think of the signal quality.

All HDMI cables should have the same pin out. I don't see any variations yet.
Unlike S-Video cables which has different number of pins for different equipments.

As far as quality goes, for cable, usually the more expensive ones are built with better looking connector. There are no different between a $500 and a$50 one; they work the same as far as for human observation.

As for the examples below, I believe the quality are the same built with nice thick cable and gold connectors. Have you consider drill hole through the wall for using shorter cable.

Amazon.com: 50ft HDMI to HDMI Premium Gold Series Cable w/Gold Plated Connectors ATC Certifi: Electronics

Amazon.com: Monster HDMI 1000HD Ultra-High Speed HDMI Cable (50 Ft.): Electronics
 
Last edited:

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bruce2 said:
Hi panais, 50,000:1 is very impressive!

50ft is not long at all, if 500ft then you may think of the signal quality.

All HDMI cables should have the same pin out. I don't see any variations yet.
Unlike S-Video cables which has different number of pins for different equipments.

As far as quality goes, for cable, usually the more expensive ones are built with better looking connector. There are no different between a $500 and a$50 one; they work the same as far as for human observation.

As for the examples below, I believe the quality are the same built with nice thick cable and gold connectors. Have you consider drill hole through the wall for using shorter cable.

Amazon.com: 50ft HDMI to HDMI Premium Gold Series Cable w/Gold Plated Connectors ATC Certifi: Electronics

Amazon.com: Monster HDMI 1000HD Ultra-High Speed HDMI Cable (50 Ft.): Electronics
Click to expand...
I forgot to write that i already have 1 connected tv in my graphic card and i want to connect a SECOND tv in the SECOND hdmi of my card.
Is that ok? i will find any problems in picture quality,sound or anything else?
The purpose of all this is to play(1920x1080) games in my room,and watch 1080p movies in the living room.
How i enable the second tv view in my card?
(Btw i found a 15metres HQ hdmi cable) is that a good brand?
 

My Computer

System One

  • Manufacturer/Model
    Custom Built by me.
    CPU
    Intel Core 2 Quad Q6600
    Motherboard
    Gigabyte GA-X38-DS4
    Memory
    KINGSTON HYPERX DDR2 4GB (2X2GB) PC6400 800MHZ DUAL CHANNEL KIT
    Graphics card(s)
    SAPPHIRE RADEON HD4890 OC 1GB GDDR5
    Sound Card
    2/4/5.1/7.1-channel Realtek High Definition
    Monitor(s) Displays
    Samsung LE40A656F1 1080p 100Hz LCD HD TV 50,000:1
    Screen Resolution
    1366x768 in Desktop,1920x1080p in gaming and video
    Hard Drives
    C:\WD VelociRaptor 150 GB,10,000 RPM D:\WESTERN DIGITAL WD15EADS 1.5TB CAVIAR GREEN SATA2 E:\WESTERN DIGITAL WD15EADS 1.5TB CAVIAR GREEN SATA2 No Raid.Copy Paste Is The Safest Way.
    PSU
    Seasonic 700W 80plus
    Case
    A-Case Twin Engine BB
    Cooling
    3 thermaltake smart case fan II + 1 arctic cooling fan
    Mouse
    Wirelles Logitech Laser Mouse MX620
    Keyboard
    Wireless Logitech LX710
    Internet Speed
    ADSL 4000plus
    Other Info
    F:\Sony high speed sata Dvd Rewriter KINGSTON HYPER X FAN +Cordless Rumblepad 2
$238 for a 50 foot HDMI cable. Couldn't you buy a Blu-Ray at Walmarts cheaper?
 

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