-=PCTechTalk=- Re: Method to test hub?
- From: Master NetLord <NetLord@xxxxxxx>
- To: <pctechtalk@xxxxxxxxxxxxx>
- Date: Mon, 15 Jul 2002 14:38:35 -0400
Well, this is one of those situations where I tried to answer quickly and
didn't choose my words correctly. In some documentation, bandwidth is used in
place of power, probably because the computer supplies the power along with the
bandwidth -- and when you exceed the designed amount of power, your equipment
fails (as you said too). I think you and I are in violent agreement <chuckle>
The situation here is I actually use four ports, the computer has only two
ports. My logic says the computer will not deliver enough "power" to run the
four pieces of equipment. The hub has a power supply, but I question if it's
working because when I plug it in to the hub, the red light comes on, not the
green light. One way to check this would be to put a volt meter across the tip
of the connector for the power supply and see if it's delivering what it is
supposed to. That's a project for tonight as my mother's refrigerator ice
maker broke and flooded her kitchen.........now I'm a plumber, not an
electrician <G>
Regards from the
"Keyboard Cowboy",
Master NetLord
,,,,,
Ô¿Ô¬
Cincinnati, Ohio
Scottsdale, Arizona
«::::»¤«::::»¤¤«::::»¤«::::»
Monday
07/15/2002
2:31:35 PM
On Mon, 15 Jul 2002 11:23:23 -0400, Jim wrote:
>
>The POWER SUPPLY has NOTHING to do with the BANDWIDTH.
>
>The sole purpose of th epower supply is to supply the DC power
>needed to operate the devices. Typically the computers internal
>power supply, supplies a limited amount of power to the USB ports.
>If the device requires more power than what is normally available
>via the usb bus then it should have it's OWN power supply.
>Some hubs don't supply any additional power, however my guess would
>be most do supply power.
>
>The kind of problems your describing could indicate a power problem,
>but it could also be a software/driver interference problem.
>
>I don't know about your mobo, but on mine, I can check the amount of
>current being supplied to each USB port, not sure about my hubs
>which have their own seperate power supplies.
>
>-Jim-
>
>
>Master NetLord wrote:
>>
>>Actually, the answer may lie within that thought -- I've been
>>thinking about this (ain't that dangerous <G>). There is a limit
>>to the bandwidth a USB device can use. The powwer supply is
>>supposed to give it additional power (bandwidth) but what if the
>>power supply went bad? That would, perhaps, explain why it won't
>>work, and why the light is red instead of green.
>>
>
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