Request for help with PA power measurements

Harald Welte laforge at
Mon May 10 17:01:29 UTC 2010

On Mon, May 10, 2010 at 06:11:00PM +0200, Harald Welte wrote:
> The only thing that puzzles me:  It seems to max out at about 30.7dBm, that's
> about 1.17 Watts, i.e. much less than the 4W (36dBm) that it should be able to
> transmit as maximum power in GSM900...

Ok, my wrong.  The RF-PA (SKY77324) used in the phone cannot actually transmit
more than 35dBm.  As there is additional loss incurred by the cables, antenna
connector and the antenna switch (the diode switch between antenna socket and
PA), the 30.something dBm actually seem quite reasonable.

- Harald Welte <laforge at> 
"Privacy in residential applications is a desirable marketing option."
                                                  (ETSI EN 300 175-7 Ch. A6)

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