In fact, there are 32 power levels for CC2420, since it is stated by a five bit number (0 to 31).
Number 0 states power-off. Number 31 states higher power (0 dBm). Number 27 states states -1 dBm. What about Number 29 ? It states a power level between -1 and 0 dBm, something near -0.5 dBm. The table Poonam sent refers to a list of power levels of special interest (1 mW = 0 dBm, 0.5 mW = -3dBm, . . .). But you can use any number in the range of 0 to 31. The same fact occurs in CC1000 radio of Mica2. CC1000 uses a 8 bit number to state its power level, but CC1000 data sheet lists only 31 power levels. You can see in CC1000 data sheet that PA_POW 0x02 corresponds to 3 power levels (-6 dBm, -17 dBm, -18 dBm) for 433 MHz RF frequency. ***************** João Giacomin Prof-DCC-UFLA ***************** ---------- Original Message ----------- From: Poonam Hiwal <[email protected]> To: [email protected] Cc: [email protected] Sent: Sat, 21 Mar 2009 10:26:01 +0000 Subject: Re: [Tinyos-help] RF output power levels > Hi, > > There are 8 discrete power levels each corresponds to RF transmit power as > follows: > Power level Transmitted power level > 31 0dbm > 27 -1dbm > 23 -3dbm > 19 -5dbm > 15 -7dbm > 11 -10dbm > 7 -15dbm > 3 -25dbm > > Thanks, > Poonam > > On Fri, Mar 20, 2009 at 4:34 PM, hodiapa <[email protected]> wrote: > > I am confused. > Page 51 of CC2420 says it has 8 output power settings. > Some where else it was said that we can have 31 different power settings for > CC2420. > > Whats the exact number of output power levels available? > I am using MICAz mote. > > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > ------- End of Original Message -------
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