View Full Version : cable bandwith read this


leftkidney
01-26-07, 01:45 AM
I am not a expert but my friend has a dad who is a engineer and a professor who has a 10 year at a major college (I cant name it) is an expert and he took the M$ component the Pelecan and the Monster component cables

he did some sweep tests on them and what he did was cut off both ends of the cable and connected it to a tester to measure bandwidth and what he came up was this


M$ cables - 1.8-2.1 GHz

Pelecan cables - 1.3-1.9 GHz

Monster cables - 3.1-3.9 GHz

I was told that higher is better and that you only need 2.97 Gb/s or 1.485 GHz for 1080p so I guess the M$ cables are just fine but why not have a better cable

like I said I am no expert and I cant really ask specific questions to him I was only able to get him to do this because I was friends with his son and he asked him he is really busy and shouldn't of done this in the first place at the university

kylebisme
01-26-07, 03:43 AM
I was told that higher is better and that you only need 2.97 Gb/s or 1.485 GHz for 1080p so I guess the M$ cables are just fine but why not have a better cable
Becuase there is nothing better about having more than you need, just like there is no point in getting a 50 gallon wheelbarrow if you only need to haul 25 gallons of dirt.

Mustang1
01-26-07, 04:58 AM
what a waste you should have just donated the three cables to someone on here who didnt have any.

leftkidney
01-26-07, 05:52 AM
Becuase there is nothing better about having more than you need, just like there is no point in getting a 50 gallon wheelbarrow if you only need to haul 25 gallons of dirt.

true but the scaler chip in the 360 can scale up to 2048x4096 now I know this doesent matter and probly wont ever but lets just say someone hacks it like the XBOX 1 and on the XBOX 1 you can upscale dvd's to 720p 1080i dont work so well with only a 733 and 64megs of ram but with the 360 if someone could make it output a higher res than 1080p those better cables would be worth it

also I see plenty of people who drive SUV's and never go off road around here (Detroit) there are a lot of SUV's that people like my neighbor are afraid to drive in the snow even though it has 4WD and could go through worse why did they get such a car because just because you ant going to use it dont mean people dont want it

I know it is a waste and a lot of people I have talked to said it as well but I dont care I have like 7 xbox 1's in pieaces and 2 360's so waste ant a concern of mine now I am not rich or anything I dont even make 6 figures a year sh*t 5 is pushing it I am a college student who likes to hack and figure out things

also I rarly spent my own money on things that I hack I get them from various people who want to see what I will do with it I dont ask where they got it from probly stolen now that I think about it but anyway I just thought people would want to know what the through put of the cables are

lcaillo
01-26-07, 06:24 AM
The numbers are really meaningless. The more vlaid question if one is measuring the frequency response of the cables would be what are they doing in the bands that cover video, when terminated to 75 ohms. The upper limit of response tells you nothing about how they perform where it matters. Some cables have peaks or dips in lower frequency ranges that matter. Most do not, but the last monster cable video interconnect that I measured had relatively erratic response in the frequencies used by NTSC. Simple QS RG6 was rather flat by comparison.

Mostly, none of it makes much difference in the resulting picture.

leftkidney
01-26-07, 07:05 AM
The numbers are really meaningless. The more vlaid question if one is measuring the frequency response of the cables would be what are they doing in the bands that cover video, when terminated to 75 ohms. The upper limit of response tells you nothing about how they perform where it matters. Some cables have peaks or dips in lower frequency ranges that matter. Most do not, but the last monster cable video interconnect that I measured had relatively erratic response in the frequencies used by NTSC. Simple QS RG6 was rather flat by comparison.

Mostly, none of it makes much difference in the resulting picture.

what test should I try to have him do?

pulse333
01-26-07, 08:54 AM
"professor who has a 10 year at a major college"

LOL did u mean "tenure"?

lcaillo
01-26-07, 09:08 AM
what test should I try to have him do?

Report the response over the entire measurement, not just some obscure maximum bandwidth assesment. Use the connectors instead of cutting them off and terminate the cables as they would be terminated in actual use. Report on the equipment used and procedures in measurement. If he is a professor in engineering he knows how to properly report data. He should also know that testing is more meaningful when it more closely models the application.

reshp1
01-26-07, 10:53 AM
Tell him you want a "bode plot," it'll show you a gain/attenuation vs frequency.

And the above poster is right, if you're cutting off the connectors and connecting to a high-impedance load the results are going to be grossly different than if it were terminated with 75 Ohms.

(btw, it's "tenure" not "10-year")

skogan
01-26-07, 01:12 PM
"professor who has a 10 year at a major college"

LOL did u mean "tenure"?


LOL good catch :)

NorthJersey
01-26-07, 02:11 PM
So my cousin's sister-in-law's nephew knows this guy who once talked this other one who read a post from someone who quoted this guy who said that monster cables are ripoffs, but that guy's cousin and his friends are salesmen at the local best buy and circuit city, respectively, who will tell you that the only option is to buy monster cables

how's that :-)

Doctor Krypton
01-26-07, 02:42 PM
"professor who has a 10 year at a major college"

LOL did u mean "tenure"?

LOL I just fell out of my chair.

tbass2k
01-26-07, 04:44 PM
"professor who has a 10 year at a major college"

LOL did u mean "tenure"?

That was pretty good...lol.

lcaillo
01-26-07, 05:39 PM
"professor who has a 10 year at a major college"

LOL did u mean "tenure"?

For which one must produce much "manure."

The Batman
01-26-07, 05:46 PM
"professor who has a 10 year at a major college"

LOL did u mean "tenure"?

lol I missed that the first time around.