[Tinyos-devel] ClearThreshold value in tossim

Alban Hessler alban.mailing at googlemail.com
Wed Feb 4 01:19:00 PST 2009


Hi Lumir,

I posted the same question the other day, and still waiting for an
answer on that.

Best regards,

Alban

2009/2/3 Lumir Honus <foldus at gmail.com>:
> On Tue, Feb 3, 2009 at 6:59 PM, Lumir Honus <foldus at gmail.com> wrote:
>> Hello,
>>
>> I have read cc2420 datasheet, and there is written that carrier sense
>> level (RSSI.CTR_THR) is initially set to -77 dB. Can someone explain
>
> sorry RSSI.CCA_THR
>
>> me why clearThreshold is set to -72 dB in tossim ?
>>
>> (CpmModelC.nc - line 192)
>>  // This clear threshold comes from the CC2420 data sheet
>>    double clearThreshold = -72.0;
>>
>
> I just realized that there is also CCA_HYST substracted from CCA_THR
> on CC2420 but this is set to 2 by default so I think that
> clearTreshold should be -79 dB.
>
>
>> --
>> ---------------------------------------------------------------------
>> Greetings
>>        Lumir Honus
>>
>
>
>
> --
> ---------------------------------------------------------------------
> S pozdravem
>        Lumir Honus
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