Hi Markus,
it seams that you don't know what the Hauppauge Nova-T 500 is:
Its not a USB device itself, its a PCI card with a VIA PCI/USB-Bridge
Chip connected to multiple DIBcom USB chips:
http://www.bttv-gallery.de/high/bttv-gallery.html
I bought the card with the idea in mind that it uses low power USB
technology, but that was a mistake.
Next time I will buy a real usb device and know it isn't allowed to eat
more than 2.5W.
Greetings,
Marco
Markus Rechberger wrote:
On Mon, Apr 13, 2009 at 4:18 AM, Marco Borm <linux-dvb@xxxxxxxxxxxxxxxxx> wrote:
Hi Henrik,
one of the cards in my system is the dib0700 based "'Hauppauge Nova-T 500".
Compared with the "TerraTec Cinergy 1400" I would say that the receiver
sensitivity is worse but the main problem I have is that the card
consumes a loot of energy (8-13W), which is much more than the
Terratec(5-6W).
That's a little bit weird USB itself should provide max 5V 500mA which would be
2.5 Watt; if it requires more then the device has to be self powered.
Maybe you can try to use a different USB device (eg. storage) just for
testing the
consumption. USB is supposed to require alot power (the controller).
You might try to unload the ehci/ohci driver too.
Markus
I calculated this using measure values of the whole system captured with
a Conrad/Voltcraft Energy Monitor 3000.
Personally I am little bit shocked about that and wondering if this can
be true because the dib is a USB-device, but the Voltcraft is one of the
better measurement device.
Maybe the VIA usb-hub controller on the board is the problem?!
Would be interesting of someone has the same or other experiences with
this card or other PCI based cards. Hauppauge ignores all my questions,
so I can't recomment products of this manufacturer anyway.
Greetings,
Marco
H. Langos wrote:
I've been trying to minimize energy consumption [...] But before running
out in the street and buying the first dib0700 device I'd like to know if
there are any devices that are
- especially good [...]
or
- especially bad [...]
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