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Question about PRISM2 header rate field

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Hi folks -

I can decode captured Monitor Mode PRISM2 headers in a reasonable way, except for the rate field.

On a capture of a broadcast which I believe was at 54Mbps, I see the PRISM2 / ieee80211_frame_info field "datarate" is set to 0xf0, or 240 decimal. I looked around at the various different ways of talking about tx rate in the stack and drivers, but none that I found use 0xf0 for 54Mbps. Is it 48Mbps in units of 200kHz? Or 54Mbps in units of 225kHz (!!) Or...?

I am trying to reissue this captured packet using the management interface (which I can now conjure up) with a rate that I can control, but I did not find any information on the coding for this field.

-Andy
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