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MaxG
February 10, 2008, 21:28:14
Hi,

two weeks ago I acquired a DMK 21AU04.AS camera from Baader Planetarium. I cannot get this camera to work with my laptop. It's an older Dell Inspiron 5000e, 750 MhZ P3, 256 MB RAM. I use a Conrad Electronics 32bit Cardbus-adapter (2x USB 2.0, 1x LAN) which works fine with all sorts of peripheral devices (2 external HDs, 300 MB and 500 MB).
OS ist Windows 2000 , SP4, Build 2195, DirectX 9.0c is installed, all new updates done.

The camera ist recognised by the OS whe connected to the cardbus adapter. The generic windows installation dialogue appears which I cancel in oder to install the drivers via TIS installation CD. After this is done (with Windows warnings that the software I want to install is not verified by Microsoft) I proceed to install IC Capture AS 2.0. After finishing the installion process IC Capture tells me "No devices found" and Windows tells me "Drivers could not be loaded ,Code 31".

I have redone this several times, uninstallinng the drivers and the device completely and reinstalling everthing. No solution.

Do I need a newer laptop or a XP (Vista) ?


Regards

Max

Stefan Geissler
February 11, 2008, 09:59:52
Max,

I am very sorry, but the USB camera do not work in Windows 2000 anyway. I can only suggest to exchange it against the FireWire camera. (-> external power supply needed)

MaxG
February 11, 2008, 17:21:55
Stefan,

this is what your website says:

Software-Voraussetzung
PIII/800 MHz, 128 MB
Grafikkarte mit 24 oder 32 Bit
Windows 2000, XP u. Vista (32 bit & 64 bit)
DirectX® 9.0c oder höher

So, to say the least: you answer comes to me as a bit of a surprise.

Perhaps you should change this on your website ?

Will the camera work under Windows XP or is it better to switch to the Firewire Cam anyway ?

Regards

Max

Stefan Geissler
February 11, 2008, 18:02:42
Yes,

but under the USB camera is Windows 2000 not listed.

Please let me know the link where you find the "Software-Voraussetzung"

MaxG
February 11, 2008, 19:02:13
Stefan,

well, strictly said: you are right. But, the thing is, if you look at this page

http://www.astronomycameras.com/de/products/usb-cameras/mono/dmk21au04as/

and follow the link (bottom of the page):

http://www.astronomycameras.com/de/products/software/

you are directed to the Firewire-Software Page (from the USB-camera page).

I find this a bit misleading and again, strictly said, there is no page within your website which specifies the SW-requirements for USB cameras (please correct me if this is wrong).

Regards

Max

Stefan Geissler
February 12, 2008, 11:46:31
Thank you, I forwarded this to the Astro webmaster.

Danke, ich habe das an den Astro-webmaster weitergegeben.

Rando
February 13, 2008, 04:32:00
The other problem is with some USB "cards". Orion CCD cameras do not like VIA chipsets on USB 2.0 expansion cards. So, even if you were to change your OS to XP or VISTA, you STILL might have a problem with the USB.

Stefan Geissler
February 13, 2008, 09:25:28
Rando, Max,

Until now we had no known problems with USB 2.0 chipsets itself. But it happens that the USB 2.0 performance in the computer is not high enough. This means, that the USB 2.0 bus switches from high speed back to full speed. In this case our cameras wont work with full frame rates and the DFG/USB2-lt can not be used. Only assembling an extra USB 2.0 board can fix such a problem.

Changing from Windows 2000 to XP could solve Max' problem, but older DELL laptops had trouble with external peripheries. I would suggest to use FireWire camera instead. The disadvantage is the use of an extra power supply.

MaxG
February 25, 2008, 14:24:46
Stefan,

I bought an new Laptop (Dell Vostro, with CoreDuo 2Ghz, 3 GB RAM, 250GB HD, XP Professionell).

The installation of the DMK was a breeze, no problems.

Yesterday evening, I put the camera to test in "real life": the transfer rate rate is horribly low ! 2000 images of Saturn, at a specified framerate of 60fps took 204 sec to finish, which gives about 10fps.

The computer has 4 USB 2.0 exits, in groups of two, ie. 2 on the rear, two on the right side. I had no other peripheral device connected to the "rear block" of USB-exits, only the DMK. The computer mouse was attached to the "side block".

Question: if I use a Cardbus Adapter, will the framerate be better ?

Slowly but surely it occurs to me that the Firewire Cam would have been a better choice.
Would you trade it in :-) ?

Regards

Max

Stefan Geissler
February 25, 2008, 15:36:33
Max,

May be your Laptop has not USB 2.0 highspeed (480 MB/s) , but full speed (12 MB/s) only. In this case a card bus adapter with an USB High Speed would fix your problem. But I suggest to test this, before buying a cardbus adapter.

MaxG
February 27, 2008, 09:14:19
Stefan,

I put this question to Dell support and the answer is: yes, there is integrated high speed USB 2.0 Support.

The Chipset is Mobile Intel® PM965 Express Chipset which uses five USB/ full/low-speed host controllers UHCI Rev. 1.1 and two USB 2.0 Enhanced Host Controller (EHCI) interfaces using the same pins as the full/speed low speed ones. A routing logic determines wether a USB port is controlled by one of the UHCI or EHCI controllers (I delved a bit into the Chipset doc., about 800 p. :-))

Somehow, the DMK ist not recognised as a device requiring USB 2.0 higspeed performance. I am *really* not a computer specialist and have no idea how to make the DMK communicate with the EHCI USB controller.

The laptop has an Express card slot: will an Express card with USB 2.0 Highspeed ports solve the problem ?

Regards

Max

Stefan Geissler
February 27, 2008, 11:09:37
Max


The laptop has an Express card slot: will an Express card with USB 2.0 Highspeed ports solve the problem ?
I would guess so.

MaxG
February 27, 2008, 12:48:00
Ok, lets hope for the best. It's probably the least time consuming solution.

Regards

Max

MaxG
February 27, 2008, 14:48:49
Hi to all who were interested in this subject,

the solution to the slow framerate is not hard- or software-related, but simply my fault (mea culpa).

I have used an exposure setting of 1/8 s, which delays the framerate. When I set the exposure time to 1/60 I get 60fps. Test-Avis with 10 seconds yielded nearly 600 images.

Thanks to everybody, especially Stefan.

Really my fault, so stupid ...

Best Regards

Max

Stefan Geissler
February 28, 2008, 12:08:01
Max,

Thank you for you posting. In the future I will also ask for the used exposure time too.

thremy
October 31, 2010, 12:14:14
Max,

I am very sorry, but the USB camera do not work in Windows 2000 anyway. I can only suggest to exchange it against the FireWire camera. (-> external power supply needed)

Hello,

I just bought a DMK21 and i have the same problem, my astronomy PC is working with windows 2000 and i don't really want to change.
I have a question : which kind of power supply are talking about ? 5 volt, 12 volt ...

Thanks
Thierry
http://astrosurf.com/remy/

Stefan Geissler
November 1, 2010, 10:15:43
Hello

Windows 2000 has no matching USB 2.0 HighSpeed driver, thus you can not use the USB CCD cameras in Windows 2000.

Power supply for USB cameras is 5V.

thremy
November 4, 2010, 22:32:38
Hi,

I was talking of the power supply of a fireWire camera, not usb2.

If i buy a fireWire DMK camera i can use it with win2000, isn't it ?

Thanks
Thierry

Stefan Geissler
November 5, 2010, 14:59:59
If i buy a fireWire DMK camera i can use it with win2000, isn't it ?
Yes. And a 12V power supply is needed.