RE: Polaroid Sprintscan 4000 connectivity

"Laurie Solomon" <laurie@xxxxxxxxxxxxxx> · Tue, 14 May 2002 22:23:07 -0500

>According to this, USB 2.0 is the speed winner

I have no arguments with that.

>and the way the page reads,
>I think I would be justified in being peeved if my Perfection 2450 didn't
>operate at USB 2.0 speeds if I had a USB 2.0 port on my computer.

I guess you would but I would say that you were just caught in the old
marketing hype gotcha.  Does the literature, specs, manual, or packaging say
that the scanner is USB 2 or just merely compatible with USB 2.  If it says
the former, you have grounds for legal action if it is not up to USB 2
standards; but if it says the later, good luck.

-----Original Message-----
From: owner-scan@leben.com [mailto:owner-scan@leben.com]On Behalf Of
James E. Martz
Sent: Tuesday, May 14, 2002 8:04 PM
To: scan@leben.com
Subject: RE: Polaroid Sprintscan 4000 connectivity

OK.  I went to the Epson site to see what they had to say about it.  They
have a PDF file on their documentation page at:

<http://support.epson.com/hardware/scanner/per245/documentation.html>
called "Epson Answers (Scanners)" which addresses transfer speeds.  It
gives the following speeds for various interfaces:

Standard parallel       0.115 MBps
ECP/EPP parallel        3 MBps
USB 1.1         1.5 MBps
USB 2.0         60 MBps
SCSI                    5 MBps
SCSI-2 (narrow) 10 MBps
SCSI-2 (wide)   20 MBps
Firewire (IEEE 1394)    12.5 to 50 MBps

According to this, USB 2.0 is the speed winner and the way the page reads,
I think I would be justified in being peeved if my Perfection 2450 didn't
operate at USB 2.0 speeds if I had a USB 2.0 port on my computer.

At 11:32 AM 5/14/2002 -0500, Laurie Solomon wrote:
>Jim,
>I probably should have prefaced that remark with "to the best of my
>knowledge."  :-)
>
>At any rate, I have found in many cases a claim to be compatible with USB
>2.0 often means it will run off a USB 2.0 card but as a USB 1.1; but the
>device itself is not usually 2.0.  While as time proceeds some devices may
>be put on the market which actually are 2.0; but I suspect they will
>advertise in bold letters not "compatible with" but "USB 2.0."  Today, most
>of the add-in  cards and even the USB portions of the newer motherboards
are
>2.0 with backward compatibility; but they are somewhat ahead of the
>peripheral devices that might connect to them.

The page says that USB 2.0 is backward and forward compatible, meaning that
a USB 1.x device will work plugged into a USB 2.0 port on a computer, and
that a USB 2.0 device will work plugged into a USB 1.x port on a computer -
only they will both work at the slower speed.

>-----Original Message-----
>From: owner-scan@leben.com [mailto:owner-scan@leben.com]On Behalf Of
>James E. Martz
>Sent: Tuesday, May 14, 2002 7:34 AM
>To: scan@leben.com
>Subject: RE: Polaroid Sprintscan 4000 connectivity
>
>
>At 12:15 AM 5/14/2002 -0500, Laurie Solomon wrote:
> >Unless the USB card is one that utilizes the USB 2 standard, it will not
be
> >faster than the SCSI connection.  If it is a USB2 card, at present there
>are
> >no scanners or any other peripherals that use USB2.
>
>My Epson Perfection 2450 Photo claims to compatible with USB 2.0.  Can't
>tell if it actually operates at 2.0 speeds since my computers only have
1.x.
>

****************
James E. Martz
Milan, OH
jemartz@earthlink.net
*****************

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