[Tinyos-help] Current MAC protocol in RF230

Miklos Maroti mmaroti at math.u-szeged.hu
Fri Nov 12 12:55:23 PST 2010


Hi Francesco!

What are you measuring? How are you measuring it?

Miklos

On Fri, Nov 12, 2010 at 7:15 PM, Francesco Ficarola
<francesco.ficarola at gmail.com> wrote:
> Miklos Maroti ha scritto:
>> You need much better. Can you record one with 0.1 ms resolution?
>
> Hi Miklos. This morning I made a new analysis by the oscilloscope. I
> tried two resolution: 0.5ms/DIV and 0.1ms/DIV. Unfortunately nothing has
> changed compared to the previous test.
>
> These are the photos during transmission with the "0.5ms/DIV" resolution:
> http://img261.imageshack.us/img261/2664/dsc0768d.jpg
> http://img837.imageshack.us/img837/9052/dsc0770o.jpg
>
> With the "0.1ms/DIV" resolution I could not take pictures because of the
> high frequency, however the result was the same.
>
> The following picture is a photo with a "2.5s/DIV" resolution, just to
> watch the entire transmissions:
> http://img690.imageshack.us/img690/8413/dsc0766z.jpg
>
> So... Where is the backoff? Even if it were equal to 2 ms, with the
> "0.5ms/DIV" resolution (or "0.1ms/DIV" resolution) I should see it, but
> this didn't happen. I'm totally confused.
>
> Thanks,
> --
> Francesco Ficarola <francesco.ficarola_at_gmail_dot_com>
> [GPG KeyID: 0xDBA99D92]
>
>


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