Just remember that the PCI bus has 128MB/sec of bandwidth, at peak, and it
is sharing it among all the devices I listed earlier, plus both cardbus
slots.
- Alex
On 10/11/06, Frank K-F <ferko@attglobal.net> wrote:
>
> Stuart, Alex...
>
> I have to confess ignorance to the issues you raise, thus my question
> seeking your experience.
>
> It was suggested to me that a GigE PC card adapter is needed with the
> camera. We are looking at a 2MP imager chip, 12 bits per pixel. What I
> haven't been told yet is the frame rate, and if that frame rate can step
> back if the bandwidth is limited as for example the 10/100 that is built
> into my A31p system. I have worked with 1394 cameras with hi-res chips
> where the frame rate adjusts to the bandwidth, if for example you use
> the binning function, e.g. lower res allows higher frame rate. In
> virtually all applications in my area, machine vision in manufacturing
> processes, the camera rolls along at some frame rate (actually idling)
> until a trigger via a sensor or an event calls for the next frame to be
> captured .. to record some image or event.
>
> It is good to learn however that you found such a GigE card as a
> resource hog ... as I had visions of running 2 cameras simultaneously
> ... the other being an interline analog 8 bit at about 303KP per frame
> and 30 FPS .. into a PC-Card frame grabber in the other PC Slot.
> Initially this is for a portable demo setup, so we are trying to do more
> with less.
>
> Nonetheless, the basic question is still there. Is there a PC Card
> Adapter .. one with the Intel chips .. or do I need to look at an add-in
> card for one of my Dock-II units, and where do I find that?
>
> Frank K-F
> --------------
> Stuart F. Biggar wrote:
>
> >>My A31p has a 10/100m ethernet connection capability ... I need to
> >>connect to a camera with GigE, and am on the hunt for an appropriate
> >>PC-Card adapter. I have been told that such adapters for GigE really
> >>fall short of the mark, except those with the Intel chip-set.
> >>
> >>Has anybody in this community experience in conjunction with their
> >>ThinkPads? I'd like to hear from you.
> >>
> >>Frank K-F
> >>Brighton, MI USA
> >>
> >>
> >
> >Frank,
> >
> >Does the camera really need GigE on the computer?
> >Would plugging it into a GigE switch and your A31p
> >into the same switch work or is the camera data
> >rate too high for the 100 Mbit in the A31p?
> >
> >We deal with large (multiple GB) imagery data sets.
> >Our servers have GigE and fast disk systems so they
> >can serve up data quickly. I didn't like the waiting
> >for data to get to my notebook so I did some limited
> >experimenting with GigE with an older A21p which dual
> >booted Windows and Sun Solaris.
> >
> >I have installed a server Intel GigE PCI board in
> >a dock for an A21p - it worked but the throughput
> >was not great (but better than with the 10/100 built
> >in Intel ethernet). One problem is that the PCI slot
> >in the dock is 32-bit rather than 64-bit and slow.
> >You will probably have the same issues but maybe
> >magnified by additional layers of hardware and
> >software with Cardbus - I think that Cardbus is
> >limited to 32-bit.
> >
> >It was several years ago that I experimented and I
> >don't remeber details but sooner or later the data
> >goes to disk and that will probably be the limiting
> >factor unless you have a raid box (multiple spindles
> >going at once) with a fast, low overhead interface
> >to it. Transfer to/from RAM will work quickly for
> >a short while :-) Notebook disks, even the modern
> >7200 RPM ones, are relatively slow compared to GigE.
> >
> >The GigE in my T43p works reasonably well but I do
> >get better performance with Unix (Sun Solaris) than
> >I do with Windows XP. Again the inbound limit is how
> >fast you can offload the data to the final destination
> >(RAM or disk or another ethernet or firewire or ???).
> >
> >Stuart
> >
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> >
> >
> >
> >
>
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Received on Thu Oct 12 01:00:20 2006
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