Measure RF Power at 900MHZ
 

Hi,
I have 20 900MHZ ISM band modules and I would like to measure RF
power. I have a a Tektronix 2712 Spectrum Analyzer and some
attenuators(BNC) and RG 58 coax. Unfortunately I do not have an SMA
connection on the antenna port. there are pads for the antenna that I
could fit an SMA to but I none of the ones I can find fit quite right
because of physical interference with the RF shield.

I tried soldering the RG 58 coax to the signal and ground pads but the
signal was not visible at the spectrum analyzer. I know RG 58 is lossy
but the Belden Coax calculator said I should lose about 20% of the
power at 1 mwatt.

Any thoughts or suggestions regarding coupling this signal (100 to
500mW) to a power measurement would be greatly appreciated.

Thanks,
Ed V.