tender for purchase of electronics lab equipment , electronics lab equipment , multi output regulated dc power supply: specification: input voltage : 230v ±10% ac 50 hz output voltage current : (a) 0-30v dc/2amp (b) 0-± 15 vdc/1amp (c) 0 - 5v dc / 5amp load regulation (cv) : 0.05 % ± 3mv from no load to full load load regulation (cc) : 0.05% ±1 ma from no load to full load line regulation (cv) : 0.01 % ±3mv for 10% variation input voltage line regulation (cc) : 0.01% ±1 ma for 10% variation input voltage operating mode : independent and tracking mode ripple : less than 1 mv meter : (1) two digital meters to monitor the output voltage current of output a (2) one digital meter to monitor the output voltage of output b , selectable by switch (3) one digital meter to monitor the voltage of output c protection : against short circuit and overload warranty should have 3 - years warranty. , cathode ray oscilloscope: • dual trace dual channel oscilloscope • bandwidth: 30mhz • full bandwidth sweeping circuit is used in the sweeping system • the flexible and convenient triggering mode has the functions for selecting signals from one channel or triggered by extension signals • alt trigger to observe signals from two irrelative channels • the instrument has the functions of tv-h / tv-v synchronization and trigger-lock to observe all kinds of signals stably • from the terminal for trigger input, ch1 and ch2 signals can be output along with the triggering channel to connect the extension frequency counter • y deflection operation: y1, y2, alt, chop, add, mode x-y • vertical deflection: 5mv/div to 20v/div in factor 1-2-5 sequence in 12 steps • rising time: 18ns • maximum input voltage: 400v (dc +acp-p) • triggering source: y1, y2, alt, power, extension • trigger coupling: ac/dc (ext), norm/tv-h, tv-v • horizontal sweep mode: auto, trig, lock, single • sweep time factor: 0.1us/div to 0.2s/div in 1-2-5 sequence in 20 steps. • magnification: x10 • x-y mode input: x-axis yi and y-axis y2 • z axis minimum input level: ttl level • calibration signal: square wave of 0.5v at 1khz • ctr display size: 8cm x 10cm. warranty: should have 3 - years warranty. , arbitrary function generator: • make: htc fg2002 • frequnecy range • 0.1hz-2mhz (fg-2002) • 0.1hz-10mhz (fg-2010) • waveforms • sine wave, square wave, triangle wave, positive & negative sawtooth and positive & negative pulse • square-wave front • 0.1hz-2mhz100ns • 0.1hz-10mhz35ns • sine wave distortion • 1% (10hz-100khz) • frequency response • 0.1hz-100khz±0.5db • 100khz-5mhz±1db • 100khz-2mhz±1db • ttl/cmos output • level: ttl pulse low level is no more than 0.4v, high level is no less than 3.5v • rissing time: no more than 100ns • output: impedance: 500±10% • amplitude: no less than 20vp-p (empty load) • attenuation : 20db 40db • dc bias 0-±10v (continously adjustable) • adjustment range of symmetry: • 90:10-10:90 • vcf input • input voltage: 5v-0v±10% • the maximum voltage ratio: 1000:1 • input signal: dc-1khz • frequency meter • mesuring range: 1hz-20mhz • input impedance: no less than 1m?/20pf • sensitivity: 100m vrms • the maximum input: 150v (ac+dc) with attenuator • input attenuation: 20db • mesurement error: 0.003%±1digit • voltage: 220v±10% (110v±10%) • frequency: 50hz±2hz (220v±10%)