#393: Txpower malfunction
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Reporter: anonymous | Owner: dyqith
Type: defect | Status: assigned
Priority: minor | Milestone: version 1.0.0 - first stable
release
Component: madwifi: driver | Version: trunk
Resolution: | Keywords:
Patch_attached: 0 |
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Comment (by [EMAIL PROTECTED]):
Power measurements were done by putting two PC compatible boards side by
side.
One is running an atheros card with chipset 5212 on monitor mode. The
other one has an Engenius EMP-8602. Neither machine have an antenna, so
power levels do not saturate the receivers.
Machine 1 in monitor mode runs NetStumbler. Machine 2 with Pyramid Linux
runs madwifi.
1. Set power level on the EMC-8602 to 1.
2. Observer dBm on the NetStumbler receiver.
3. Increase power level on the 8602 by 5dBm.
4. Verify that signal level at NetStumbler has also increased by 5dBm.
5. Repeat 3 and 4 5dBm at a time.
6. Observe that past 18dBm, increasing the power on the 8602 has no effect
on the strengh of the received signal on the other side (maximum level
obtained was 45dBm at the receiver with 18dBm on the transmitter).
Alternatively one can run the same experiment connecting the radios
directly with SMA pigtails and a 50dBm attenuator.
In this example I mentioned NetStumbler, but I have also used Linux with
`iwlist ath0 scan` with the same results.
Feel free to contact me by e-mail directly so that I can provide more
assistance and give you access to my test network.
--
Ticket URL: <http://madwifi.org/ticket/393>
MadWifi <http://madwifi.org/>
Multiband Atheros Driver for Wireless Fidelity
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