4 Oct
2023
4 Oct
'23
11:24 a.m.
David, The corrected sketch is attached. Thanks for pointing that out. ERP, as the FCC states, is the PEP power delivered to the antenna times the gain of the antenna. ERP is relative to a half wave dipole. As an example, 100 W ERP is 25 W PEP at the antenna with an antenna with 6 dB gain (referenced to a half wave dipole, so it's 6 dBd - which is a power ratio of 4). Or it's 100 W PEP at the antenna with a halfwave dipole (gain is 0 dBd). I think footnote 96 tries to make sure that power at the antenna and antenna gain are the parameters used to determine if you meet the ERP limit. The ITU WRC-2015 allocation of 9.15 W PEP ERP would decrease your transmitted signal by about 10 dB - almost 2 S-units. Carl
