I have this somewhere in my notes, but I can't seem to find it. Can anyone point me in the right direction to calculate [roughly] the RF power output (in watts) of a transmitter using a spectrum analyzer?

It is operating on 3VDC, has a current draw of 9.58mA. The Spectrum Analyzer is reading -34dBm at 1.03GHz, 12 inches between the antenna of the Spec-A and the transmitter.

Thanks in advance.

 

Why dont you terminate the transmitter into a 50Ω load (not an antenna) and use the spectrum analyizer to read the power level directly. -30dbm wont hurt it...

Other wise, separate the receiving antenna further (to get out of the near-field region) and use this.