How to keep sd8686 transmitting data using a fixed channel?

Johan Adolfsson Johan.Adolfsson at
Sat Dec 26 05:17:51 EST 2009

> -----Original Message-----
> From: libertas-dev-bounces at [mailto:libertas-dev-
> bounces at] On Behalf Of Dan Williams
> Sent: den 25 december 2009 21:04
> To: Ivan Li
> Cc: libertas-dev at
> Subject: Re: How to keep sd8686 transmitting data using a fixed
> channel?
> On Tue, 2009-12-22 at 10:14 +0800, Ivan Li wrote:
> > Hi guys,
> >
> > We are doing a test to find out the transmitting power of the sd8686,
> which is needed by SAR.
> > I am wondering if libertas has some programming interface to set the
> freqency (channel) and issue an infinite data Tx?
> The channel can be set with standard WEXT commands and 'iwconfig'.
> What
> I'd do here is to set up an adhoc BSS where the 8686 is the only
> station
> and then start pumping out packets of some type.  Flood pings perhaps.
> You can get the device up on a channel by doing somethign like:
> iwconfig eth1 mode adhoc essid foobar channel 6
> <periodically run iwconfig and wait for the BSSID to become non-zero>
> then start pumping the frames out.
> Dan

Although this method may give a more "real case" value - it will 
probably not give the worst case.
Marvell has a special firmware that support setting bitrate, frequency and
a couple of different continuous transmit modes (and rx mode).
You should be able to get it from Marvell (if you have an account) or 
perhaps your module manufacturer.

Best regards

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