Features: 0.03Hz to 3MHz frequency range Simultaneous display of frequency & amplitude External 7 digit 120MHz frequency counter High waveform quality at all frequencies & levels 2mV to 20V pk-pk from 50 Ohms or 600 Ohms Variable symmetry with constant frequency Auxiliary TTL/CMOS output 1000:1 frequency change by vernier or sweep voltage Precision internal linear or logarithmic sweep Internal or external amplitude modulation Accessories: 2U Rack Mount for plastic cased bench instruments Specifications: Frequency Range: 0.03Hz to 3MHz in 7 overlapping decade ranges with fine adjustment by a vernier. Vernier Range: 1000:1 on each range. The TG330 has all the features of the TG320 plus an internal sweep generator with linear or log sweep, variable sweep rate and a sweep output socket. It also offers internal or external amplitude modulation.