Question for the Masses

Starpoint · 08-31-2005

I was asked in a PM about that Airlink card and its milliwatt power levels, so I got out its very limited manual and the box and looked

here is what I got from the box

The spec's on it show 3.3 volt with 520 milliamp on the TX and 425 milliamp on the RX as the consumption rate

Using these specs and the formula of volts x amps = wattage
3.3 x .520 amps = 1.716 watts on the TX side
3.3 x .425 amps = 1.4025 watts on the RX side.
This correct?

I think thats kinda HIGH on the power.

I got an email out to them asking about it so when I get the feedback I will post.

wrzwaldo · 08-31-2005

Quote:

Originally Posted by Starpoint

I was asked in a PM about that Airlink card and its milliwatt power levels, so I got out its very limited manual and the box and looked

here is what I got from the box

The spec's on it show 3.3 volt with 520 milliamp on the TX and 425 milliamp on the RX as the consumption rate

Using these specs and the formula of volts x amps = wattage
3.3 x .520 amps = 1.716 watts on the TX side
3.3 x .425 amps = 1.4025 watts on the RX side.
This correct?

I think thats kinda HIGH on the power.

I got an email out to them asking about it so when I get the feedback I will post.

What you are looking at there is the power consumption for TX and RX. I don't think you can directly cross that to available transmit power.

beakmyn · 08-31-2005

This shows the Airlink as 15dBm (31.6mW) which sounds about right.

Starpoint · 08-31-2005

Quote:

Originally Posted by wrzwaldo

What you are looking at there is the power consumption for TX and RX. I don't think you can directly cross that to available transmit power.

That is all the tech specs they have given and I think my math is correct which is why I think the wattage I posted is too high.

I am still waiting for them to get back to me on the TX and RX milliwatts.

wrzwaldo · 08-31-2005

Quote:

Originally Posted by Starpoint

That is all the tech specs they have given and I think my math is correct which is why I think the wattage I posted is too high.

I am still waiting for them to get back to me on the TX and RX milliwatts.

You won't get RX (sensitivity) in milliwats. It will probably be in dBm. If your math is correct (I didn't check) then the wattage is correct, but it is wattage required to drive the radio not the final RF output. Repeat, those numbers do not correlate into any TX power or RX sensitivity number (other than that's the power the radio draws to function at the specified levels).

Starpoint · 08-31-2005

Quote:

Originally Posted by wrzwaldo

You won't get RX (sensitivity) in milliwats. It will probably be in dBm. If your math is correct (I didn't check) then the wattage is correct, but it is wattage required to drive the radio not the final RF output. Repeat, those numbers do not correlate into any TX power or RX sensitivity number (other than that's the power the radio draws to function at the specified levels).

got feedback from them, and they say my findings is correct...

Now if the TX and RX power outputs are about 40-50% of the consumption then this is a powerful card.. even at 30-45% of the consumption.

Starpoint · 08-31-2005

Quote:

Originally Posted by beakmyn

This shows the Airlink as 15dBm (31.6mW) which sounds about right.

That link shows the 3010 as a 15dBm card.. the 3025 has no listed spec there.

here is a pic of the client showing signal levels

Notice the signal level as -42/0 it will vary on my setup from -39 to about
-48

wrzwaldo · 08-31-2005

Quote:

Originally Posted by Starpoint

That link shows the 3010 as a 15dBm card.. the 3025 has no listed spec there.

here is a pic of the client showing signal levels

Notice the signal level as -42/0 it will vary on my setup from -39 to about
-48

If you look at this pdf it clearly states that the 3025 transmit power is 15dBm (OFDM) and 17dBm (CCK). Receive sensitivty is -93dBm @ 1 Mbps.

08-31-2005	#1 (permalink)
Starpoint Pr0nStumbler Expert Level Join Date: Apr 2003 Location: Houston Posts: 2,536	Question for the Masses I was asked in a PM about that Airlink card and its milliwatt power levels, so I got out its very limited manual and the box and looked here is what I got from the box The spec's on it show 3.3 volt with 520 milliamp on the TX and 425 milliamp on the RX as the consumption rate Using these specs and the formula of volts x amps = wattage 3.3 x .520 amps = 1.716 watts on the TX side 3.3 x .425 amps = 1.4025 watts on the RX side. This correct? I think thats kinda HIGH on the power. I got an email out to them asking about it so when I get the feedback I will post. __________________ Against the run of the mill, static as it seems We break the surface tension with our wild kinetic dreams Curves and lines -- of grand designs... Tonight's movie "Soylent Green" has been brought to you by our sponsor - Waste Management My mind is like a Steel trap - Rusty and Illegal in most states

08-31-2005	#3 (permalink)
beakmyn Free Public Wifi Join Date: Aug 2003 Posts: 4,992	This shows the Airlink as 15dBm (31.6mW) which sounds about right. __________________ ┌──────────────────────────────┐ ╞ NS Icons Explained\|et hoc genus omne ╡ └──────────────────────────────┘ Creating yesterday's future, Today!

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