uwb spectral mask

Dear all,

As I know that the FCC power spectrum mask of the UWB is around -41.6 dBm/MHz. However, this power level is measured directly from the PA output through the cable connection OR measured it from the transmitted antenna? Where could I find this material?

Thanks

wccheng

Well, I am just getting up to speed on UWB for a radar application. Apparently, you have to meet two things. The spectral mask at -41 dBm, AND part 15 emission limits (in uv/meter-which would cover the attached antenna gain).

http://www.freescale.com/webapp/sps/...UWB.htm&srch=1

Also, this is interesting:
http://www.fcc.gov/Bureaus/Engineeri...nret0203.ppt#2

But the exact measurement method appears to be contained in pages 60-80 of this document (which I have not read thru yet):
http://www.fcc.gov/Bureaus/Engineeri...2/fcc02048.pdf