A battery powered broadband noise source producing a stable continuous output spectrum of white noise over the above quoted frequency range and slightly beyond. Referring to the spectral graph the end user can compare either the performance of an antenna & cable in an open environment or the reflective properties within an anechoic chamber. It is battery powered avoiding cable layout interference. It comes as shown in a bespoke box which includes a charger with battery condition lights on the device itself. Output level 75dB/uV/m minimum in both V & H pol (see graph) as measured at 3m with a DRG antenna & a spectrum analyzer with a 1MHz IF video bandwidth. Stability: ±1dB, Batt duration: 7 Hrs. CNE Dia: 150mm. Height: 150mm. Weight: 4Kgm.