purchase of dso and afo purchase of dso and afo , digital storage oscilloscope and audio frequency oscillator , digitalstorage oscilloscope 100 mhz 2 channel digital storage oscilloscope product features signal bandwidth : 100 mhz real time sampling:max 1 gsa / s equivalent sampling rate: max 50 gsa / s 7.0 tft lcd color display 2 mpts memory depth independent vertical scale & position control knobs for each channel. edge, pulse width, video, slope, alternate trigger mode. math functions including add, subtract, multiply, divide & 1024 point fft, 32 parameters of automatic measurements unique digital filter & waveform recorder function. advanced cursor modes: manual, auto & track waveform intensity & grid brightness can be adjusted pass / fail detection, pass / fail output built-in 100 mhz hardware frequency counter save / recall types: setups, waveforms, csv file, picture standard interface usb host: support usb flash driver save / recall function & update firmware, usb device: support pictbridge compatible printer & support pc remote control, rs 232, pass / fail output. , audio frequency oscillator 1 hz to 1 mhz sine and square, 0-20v p-p output short circuit protected