4 MHz Sweep Function Generator with Dial Generates Sine, Triangle & Square waveforms from 0.5 Hz to 4 MHz 20Vpp output into open circuit (10Vpp into 50 Ohms) TTL Output <30nS Voltage Control Generator (VCG) input 100% DC offset Variable amplitude output plus 20dB attenuator 1-Year WarrantyA 4 MHz Sweep Function Generator with an analog frequency control knob, linear/log sweep and DC offset.