The OWON XSA805-TG 9kHz-500MHz is a cost effective spectrum analyzer with tracking generator inlcuded and a frequency resolutions of 1Hz. 

The OWON XSA810-TG 9kHz-1GHz is a cost effective spectrum analyzer with tracking generator inlcuded and a frequency resolutions of 1Hz. 

The OWON XSA815-TG 9kHz-1.5GHz is a cost effective spectrum analyzer with tracking generator inlcuded and a frequency resolutions of 1Hz.