Mailing List Archive

On Thu, Dec 18, 2008 at 6:01 PM, Rune Petersen <rune@megahurts.dk> wrote:
> Hi,
>
> I know this is a little off topic, but... =)
>
>
> Does anyone have an idea as to how much power a PVR-150 or an PVR-500
> draws from the PCI bus?
>
> I have a pet project with tight power requirements.
>

Less than 10W. I can test this today if you want a more accurate number.

John

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On Fri, 2008-12-19 at 00:01 +0100, Rune Petersen wrote:
> Hi,
>
> I know this is a little off topic, but... =)
>
>
> Does anyone have an idea as to how much power a PVR-150 or an PVR-500
> draws from the PCI bus?

You'll probably have to build an estimate from publicly available
datasheets.

A CX28543 chip in BT.656 Pixel mode (the mode used by ivtv) draws a
maximum 170 mA @ 3.3V plus 310 mA @ 1.25V all on it's own - according to
the publicly available datasheet.

The analog tuner mixer/oscillator, analog tuner IF demodulator, the
CX23416, the audio digtizer/mux, and the power regulation circuits are
the other big power dissipation items. You've got a shot at finding
public data on the tuner chips and the voltage regulators. The CX23416
you'll just have to make a guess.


> I have a pet project with tight power requirements.

You could probably just e-mail Hauppaugue and ask.

Regards,
Andy

>
> I any one can answer I would be grateful.
>
> Rune Petersen
>
> _______________________________________________
> ivtv-devel mailing list
> ivtv-devel@ivtvdriver.org
> http://ivtvdriver.org/mailman/listinfo/ivtv-devel
>


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I asked Hauppage this some time ago. IIRC the answer was 5W for a 150, so I
assume 10W for a 500.

-Jeff

On Thu, Dec 18, 2008 at 6:57 PM, Andy Walls <awalls@radix.net> wrote:

> On Fri, 2008-12-19 at 00:01 +0100, Rune Petersen wrote:
> > Hi,
> >
> > I know this is a little off topic, but... =)
> >
> >
> > Does anyone have an idea as to how much power a PVR-150 or an PVR-500
> > draws from the PCI bus?
>
> You'll probably have to build an estimate from publicly available
> datasheets.
>
> A CX28543 chip in BT.656 Pixel mode (the mode used by ivtv) draws a
> maximum 170 mA @ 3.3V plus 310 mA @ 1.25V all on it's own - according to
> the publicly available datasheet.
>
> The analog tuner mixer/oscillator, analog tuner IF demodulator, the
> CX23416, the audio digtizer/mux, and the power regulation circuits are
> the other big power dissipation items. You've got a shot at finding
> public data on the tuner chips and the voltage regulators. The CX23416
> you'll just have to make a guess.
>
>
> > I have a pet project with tight power requirements.
>
> You could probably just e-mail Hauppaugue and ask.
>
> Regards,
> Andy
>
> >
> > I any one can answer I would be grateful.
> >
> > Rune Petersen
> >
> > _______________________________________________
> > ivtv-devel mailing list
> > ivtv-devel@ivtvdriver.org
> > http://ivtvdriver.org/mailman/listinfo/ivtv-devel
> >
>
>
> _______________________________________________
> ivtv-devel mailing list
> ivtv-devel@ivtvdriver.org
> http://ivtvdriver.org/mailman/listinfo/ivtv-devel
>

On Thu, Dec 18, 2008 at 6:08 PM, John Drescher <drescherjm@gmail.com> wrote:
> On Thu, Dec 18, 2008 at 6:01 PM, Rune Petersen <rune@megahurts.dk> wrote:
>> Hi,
>>
>> I know this is a little off topic, but... =)
>>
>>
>> Does anyone have an idea as to how much power a PVR-150 or an PVR-500
>> draws from the PCI bus?
>>
>> I have a pet project with tight power requirements.
>>
>
> Less than 10W. I can test this today if you want a more accurate number.
>

PVR500 = 8W at idle ( measured at the wall using kill a watt meter) is
added to my Q9550 system (1 kworld 115 + 3 sata hard drives + nvidia
gforce 7200 + 6GB memory with cpu at idle) with the card added versus
not in the system. I can try recording something and get new numbers
if you want. Before pvr500, 110W after 118W.

https://www.chooserenewables.com/xcart/product.php?productid=16154&cat=266&page=1

John

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On Thu, Dec 18, 2008 at 10:56 PM, John Drescher <drescherjm@gmail.com> wrote:
> On Thu, Dec 18, 2008 at 6:08 PM, John Drescher <drescherjm@gmail.com> wrote:
>> On Thu, Dec 18, 2008 at 6:01 PM, Rune Petersen <rune@megahurts.dk> wrote:
>>> Hi,
>>>
>>> I know this is a little off topic, but... =)
>>>
>>>
>>> Does anyone have an idea as to how much power a PVR-150 or an PVR-500
>>> draws from the PCI bus?
>>>
>>> I have a pet project with tight power requirements.
>>>
>>
>> Less than 10W. I can test this today if you want a more accurate number.
>>
>
> PVR500 = 8W at idle ( measured at the wall using kill a watt meter) is
> added to my Q9550 system (1 kworld 115 + 3 sata hard drives + nvidia
> gforce 7200 + 6GB memory with cpu at idle) with the card added versus
> not in the system. I can try recording something and get new numbers
> if you want. Before pvr500, 110W after 118W.
>
> https://www.chooserenewables.com/xcart/product.php?productid=16154&cat=266&page=1
>

10W total with the ivtv driver loaded. No difference if the device is
recording or not. I tried 2 channels.
cat /dev/video1 > test1
cat /dev/video2 > test2

This # would include any added cpu and disk load as well. Obviously
there was not much..

John

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John Drescher wrote:
> On Thu, Dec 18, 2008 at 10:56 PM, John Drescher <drescherjm@gmail.com> wrote:
>> On Thu, Dec 18, 2008 at 6:08 PM, John Drescher <drescherjm@gmail.com> wrote:
>>> On Thu, Dec 18, 2008 at 6:01 PM, Rune Petersen <rune@megahurts.dk> wrote:
>>>> Hi,
>>>>
>>>> I know this is a little off topic, but... =)
>>>>
>>>>
>>>> Does anyone have an idea as to how much power a PVR-150 or an PVR-500
>>>> draws from the PCI bus?
>>>>
>>>> I have a pet project with tight power requirements.
>>>>
>>> Less than 10W. I can test this today if you want a more accurate number.
>>>
>> PVR500 = 8W at idle ( measured at the wall using kill a watt meter) is
>> added to my Q9550 system (1 kworld 115 + 3 sata hard drives + nvidia
>> gforce 7200 + 6GB memory with cpu at idle) with the card added versus
>> not in the system. I can try recording something and get new numbers
>> if you want. Before pvr500, 110W after 118W.
>>
>> https://www.chooserenewables.com/xcart/product.php?productid=16154&cat=266&page=1
>>
>
> 10W total with the ivtv driver loaded. No difference if the device is
> recording or not. I tried 2 channels.
> cat /dev/video1 > test1
> cat /dev/video2 > test2
>
> This # would include any added cpu and disk load as well. Obviously
> there was not much..
>
> John
>

Thank you for the numbers and sorry for not replying sooner.

The power constraint is measured at the psu. so a rough estimate for an
PVR-500 would be:

When powering up: 7W
After driver has loaded: 8W


It's is a bit tight considering I only have 20 Watts to play with, but
it will be fun to try.


Again thank you for your help.

Rune Petersen

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