EMC Antenna cheep vs very expensive

[Bob S]

I am trying to get some idea of my radiated noise levels at a meters or so to see if I can pickup and correlate some of what my near field probes are seeing. My unit has failed in the test labs between 30 and 300MHz so this is the only frequency of interest.

My question is, short of spending thousands on a calibrated antenna what might I expect to get out wide band scanner antenna such as this one?

http://www.ebay.com/itm/Taurus-25-1300-mhz-Scanner-Ham-General-Coverage-Discone-antenna-/301908583528?hash=item464b276468:g:Y-cAAOSwB4NWuj9Y

Thanks

[joeqsmith]

Maybe better luck posting in the radio section?