FreeCalypso > hg > freecalypso-reveng
diff pirelli/txcal @ 279:a7707c174510
pirelli/{rssi,txcal}: results of the Pirelli to CMU200 experiment
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 16 Feb 2019 18:30:11 +0000 |
parents | |
children |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/pirelli/txcal Sat Feb 16 18:30:11 2019 +0000 @@ -0,0 +1,11 @@ +In the same experiment in which I connected our CMU200 instrument to a decased +Pirelli motherboard (see rssi) I also observed the Tx power levels put out by +this phone in the PCS band by commanding the phone (by way of the CMU200 acting +in the role of a BTS in signaling mode) to transmit at each PCL from 0 to 15 +and observing the actual power measured by the CMU200. Here are the findings: +the Pirelli puts out 29.2 dBm at the highest PCL 0 (spec number is 30 dBm), +whereas for all other PCLs the measured power was within 0.2 dB of the spec +number. Thus it appears that Pirelli's Tx calibration was done like TI's +LoCosto, with only the highest power level shifted down by 0.8 dB while all +others are spec numbers. This is a smaller fudging than that which was done by +Openmoko and which we currently replicate on our FCDEV3B modems.