My bad. the setPower() command provided by CC2420Packet interface accepts *0* to 31 for tx power setting.
Ittipong 2009/3/23 Ittipong Khemapech <[email protected]> > Hi, > > According to the CC2420 datasheet page 9, it says that programmable output > power range is 24. "The output power is programmable in 8 steps from > approximately -24 to 0 dBm" > > However, I have seen some existing works on tx adaptation or the code in > TinyOS. The setPower() command accepts 1 to 31. > > Ittipong > > 2009/3/23 João Carlos Giacomin <[email protected]> > >> 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 -------* >> >> _______________________________________________ >> Tinyos-help mailing list >> [email protected] >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >> > >
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