power consumption

Hi,

I'm trying to compare the mini-pci in my laptop (an intel "Calexico
II" which is the oem put in gateway laptop, specs here:
http://tinyurl.com/679fj ) with another one i have sitting around my
house (the Netegriti a/b/g, specs here: http://tinyurl.com/6lsu3 )
wireless cards. I can't find a way to compare the power consumption
though, one is expressed as MA and one as watts. I have looked all
around the net, but no help. Can anyone here lend a hand?

thx,

dan

On 27 Aug 2004 02:04:37 -0700, (E-Mail Removed) (Dan Irwin)
wrote:

>I'm trying to compare the mini-pci in my laptop (an intel "Calexico
>II" which is the oem put in gateway laptop, specs here:
>http://tinyurl.com/679fj ) with another one i have sitting around my
>house (the Netegriti a/b/g, specs here: http://tinyurl.com/6lsu3 )
>wireless cards. I can't find a way to compare the power consumption
>though, one is expressed as MA and one as watts. I have looked all
>around the net, but no help. Can anyone here lend a hand?

The Mini-PCI card runs on 3.3 volts DC power.
Watts = Volts * Amps
In this case, just multiply the one expressed in MilliAmps times 3.3V
to equal milliwatts. There seem to be quite a few numbers, so I'll
let you do the math.


--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 AE6KS 831-336-2558

In article <(E-Mail Removed)>,
Jeff Liebermann <(E-Mail Removed)> wrote:
:The Mini-PCI card runs on 3.3 volts DC power.
: Watts = Volts * Amps
:In this case, just multiply the one expressed in MilliAmps times 3.3V
:to equal milliwatts.

A card that runs on 3.3 volts DC is supplied with 3.3V, but it does
not necessarily -use- all of that power. When it comes to radio
transmissions, it might only use a fraction of that power for
the transmittor, with whatever of the rest is used going into running
the dsp/cpu/prom/whatever . Thus 3.3 V * the milliamps rating
might give an unrealistically high power rating, perhaps even off by
an order of magnitude.
--
Live it up, rip it up, why so lazy?
Give it out, dish it out, let's go crazy, yeah!
-- Supertramp (The USENET Song)

On 27 Aug 2004 16:14:59 GMT, (E-Mail Removed) (Walter
Roberson) wrote:

>In article <(E-Mail Removed)>,
>Jeff Liebermann <(E-Mail Removed)> wrote:
>:The Mini-PCI card runs on 3.3 volts DC power.
>: Watts = Volts * Amps
>:In this case, just multiply the one expressed in MilliAmps times 3.3V
>:to equal milliwatts.

>A card that runs on 3.3 volts DC is supplied with 3.3V, but it does
>not necessarily -use- all of that power.

I beg to differ. The ratings that were in question are the power
consumption. Whether the radio turns the power into RF or smoke is of
no concern. The power is consumed (assuming a constant 3.3vdc input
voltage). If you look at the URL's previously posted, the power
consumption specs are broken down into standby, rx, tx, power save,
and such. Each has it's own power consumption level. With a constant
DC input voltage (3.3VDC), you can express power consumption in either
watts (milliwatts), or amps (milliamps).

Also, your statement of "a card runs on 3.3 volts DC.....but does not
necessarily -use- all of that power" is a misnomer. Power is measured
in watts, not volts. Are you suggesting that the card does not use
all that *VOLTAGE* or something similar? I hope not.

Also, not the title of "Power Consumption". That's consumption, not
power output.

>When it comes to radio
>transmissions, it might only use a fraction of that power for
>the transmittor, with whatever of the rest is used going into running
>the dsp/cpu/prom/whatever . Thus 3.3 V * the milliamps rating
>might give an unrealistically high power rating, perhaps even off by
>an order of magnitude.

There was no question in the original posting relating to power
efficiency or the method of regulation. As I read it, they were
interested in how much DC power (watts) the two cards burned during
normal operation in order to estimate or extend battery life.


--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 AE6KS 831-336-2558

Jeff Liebermann <(E-Mail Removed)> wrote in message news:<(E-Mail Removed)>. ..
> On 27 Aug 2004 16:14:59 GMT, (E-Mail Removed) (Walter
> Roberson) wrote:
>
> >In article <(E-Mail Removed)>,
> >Jeff Liebermann <(E-Mail Removed)> wrote:
> >:The Mini-PCI card runs on 3.3 volts DC power.
> >: Watts = Volts * Amps
> >:In this case, just multiply the one expressed in MilliAmps times 3.3V
> >:to equal milliwatts.
>
> >A card that runs on 3.3 volts DC is supplied with 3.3V, but it does
> >not necessarily -use- all of that power.
>
> I beg to differ. The ratings that were in question are the power
> consumption. Whether the radio turns the power into RF or smoke is of

> no concern. The power is consumed (assuming a constant 3.3vdc input
> voltage). If you look at the URL's previously posted, the power
> consumption specs are broken down into standby, rx, tx, power save,
> and such. Each has it's own power consumption level. With a constant
> DC input voltage (3.3VDC), you can express power consumption in either
> watts (milliwatts), or amps (milliamps).
>
> Also, your statement of "a card runs on 3.3 volts DC.....but does not
> necessarily -use- all of that power" is a misnomer. Power is measured
> in watts, not volts. Are you suggesting that the card does not use
> all that *VOLTAGE* or something similar? I hope not.
>
> Also, not the title of "Power Consumption". That's consumption, not
> power output.
>
> >When it comes to radio
> >transmissions, it might only use a fraction of that power for
> >the transmittor, with whatever of the rest is used going into running
> >the dsp/cpu/prom/whatever . Thus 3.3 V * the milliamps rating
> >might give an unrealistically high power rating, perhaps even off by
> >an order of magnitude.
>
> There was no question in the original posting relating to power
> efficiency or the method of regulation. As I read it, they were
> interested in how much DC power (watts) the two cards burned during
> normal operation in order to estimate or extend battery life.
Baiscly you hit it. Just wana know which uses more power