As a means to enable the casual and ardent WSPR user to establish a transmitting or monitoring station covering the uk 500 band a generalised frequency has been adopted, being defined as dial frequency and ERP power.
The dial frequency follows normal WSPR practice, where as the power reported in ERP may differ from the norm. The efficiency of low band antennas falls well short of 'hf' systems , reporting a power to the Ae of say 100 watts for a erp of 100 mW would not convey too much to the observer, ERP should give a better reporting structure. Rx/Tx set infromation Dial frequency 502.4 Khz Mode USB Power ERP (Effective Radiated Rower) RF Carrier freq 503.9 Khz +/- 100 Hz http://groups.google.com/group/uk500khz/web/wspr-activity-from-the-uk
