supply of digital storage oscilloscope ( 20 nos. ) , digital storage oscilloscope bandwidth : dc to 70mhz , no.of channels : 2+ext trig , memory depth : 2.5k at all time bases , sampling rate : 1gsa / s on all channels , vertical resolution: 8 bits , input sensitivity range: 2mv to 5v / div , measurements : 34 automated measurements, cursor measurements, math and fft analysis , dedicated keys : quick zooming, math, fft, reference memory should be available., fft: should have simultaneous display of both time and fft waveforms in same window, time base range: 5ns to 50s / div , dc gain accuracy: ±3%, from 10 mv / div to 5 v / div , maximum input voltage : 300 vrms with peaks = ±450 v , offset range : 2 mv to 200mv / div ( + / - 1.8v ) : > 200mv to 5v / div ( + / - 45v ) , input impedance : 1 m? in parallel with 20 pf, acquisition modes: peak detect ( up to 12ns glitch ) , sample, average ( 128 ) , single sequence, roll , trigger types : edge ( rise / fall ) , pulse width ( 33ns to 10s ) , line selectable video trigger ( ntsc, pal, secam ) trigger modes : auto, normal, single sequence , couplings : ac, dc, lf-hfreject, noise reject trigger view : required vertical scale : required separate per channelhorizontal scale: requiredzoom key: should be available for horizontal quick zooming with split up windowtime base accuracy: 50 ppm waveform storage internal : 2.5k point real time / channel+2reference memory ( 2.5k each ) waveform storage with usb : more than 90 reference waveforms per 8mb screen images storage with usb: more than 128 screen images per 8mb other keys: quick save key, menu off key, and context-sensitive help menu should be availablefeature required: integrated course ware support in oscilloscope through free software with 100mb article storage space in oscilloscope for lab purpose with courseware preparation software frequency counters: 10hz to 70mhz dedicated / channel, 6digit resolution display : 7 in. ( 180 mm ) widescreen tft-lcd color display resolution : 480 horizontal × 800 ( wvga ) active tft lcd connectivity : usb host at front and usb device at rear.power source voltage: 100 to 240v ( + / - 10% ) , 50 / 60 hz. power consumption: less than 40watts. warranty : 5 years standard accessories to be supplied along with the instrument : one 10x passive probe per channel, installation and safety manual, documentation cd, applicable desktop software & pc courseware software, calibration certificates traceable to nist / nim, power cord, and a five-year warranty statement.