FEATURES LOW COST, HIGH PERFORMANCE B+K Precision Model 2190B is one of the most economical 100 MHz analog oscilloscopes on the market, yet it has all of the high performance features needed for most applications, including delayed time base, bandwidth limiter, and Y axis output. This oscilloscope is built by and backed by B+K Precision, a company that has been selling reliable, durable, value priced test instruments for over 50 years. CRT FEATURES Rectangular CRT Rectangular CRT with large 8 x 10 centimeter viewing area. Convenience Trace rotation electrically adjustable from front panel. 0%, 10%, 90%, and 100% markers for rise time measurements. DUAL TRACE FEATURES Dual Trace Model 2190B has two vertical input channels for displaying two waveforms simultaneously. Selectable single trace (either CH 1 or CH 2) or dual trace. Alternate or chop sweep selectable at all sweep rates. Sum and Difference Capability Permits algebraic addition or subtraction of channel 1 and channel 2 waveforms, displayed as a single trace. Useful for differential voltage and distortion measurements. HIGH FREQUENCY FEATURES Wide Bandwidth Conservatively-rated -3 dB bandwidth is dc to 100 MHz. Fast Rise Time Rise time is less than 3.5 ns. Fast Sweep Maximum sweep speed of 2 ns/div (with X10 MAG) assures high frequencies and short-duration pulses are displayed with high resolution. VERTICAL FEATURES High Sensitivity 5 mV/div sensitivity for full bandwidth. High-sen- sitivity 1 mV/div and 2 mV/div using PULL X5 gain control. Calibrated Voltage Measurements Accurate voltage measurements (±3%) on 10 calibrated ranges from 5 mV/div to 5 V/ div. Vertical gain fully adjustable between calibrated ranges. SWEEP FEATURES Calibrated Time Measurements Accurate (±3%) time measurements. The main sweep has 23 calibrated ranges from 0.5 S/div to 20 nS/div. The delayed sweep also has 23 calibrated ranges from 0.5 S/div to 20 nS/div. Sweep time is fully adjustable between calibrated ranges. X10 Sweep Magnification Allows closer examination of waveforms, increases maximum sweep rate to 2 nS/div. DUAL TIME BASE FEATURES Dual Sweep Generators Main sweep gives normal waveform display, delayed sweep may be operated at faster sweep speed to expand a portion of the waveform. Four Sweep Modes Choice of main sweep only, delayed sweep only, main sweep and delayed sweep sharing the trace (percentage of main/delayed sweep adjustable), or X-Y. Adjustable Start Of Delayed Sweep DELAY TIME POSition control allows adjustment of delayed sweep starting point. TRIGGERING FEATURES Two Trigger Modes Selectable normal (triggered) or automatic sweep modes. Triggered Sweep Sweep remains at rest unless adequate trigger signal is applied. Fully adjustable trigger level and (+) or (-) slope. AUTO Sweep Selectable AUTO sweep provides sweep without trigger input, automatically reverts to triggered sweep operation when adequate trigger is applied. Five Trigger Sources Five trigger source selections, including CH 1, CH 2, alternate, EXT, and LINE. Video Sync Frame (TV V) or Line (TV H) triggering selectable for observing composite video waveforms. TV-H position can also be used as low frequency reject and TV-V position can be used as high frequency reject. Variable Holdoff Trigger inhibit period after end of sweep adjustable. Permits stable observation of complex pulse trains. OTHER FEATURES Bandwidth Limiter Selectable full bandwidth of 100 mHz or limited bandwidth of 20 MHz to filter high frequency noise from low frequency waveforms. X-Y Operation Channel 1 can be applied as horizontal deflection (X-axis) while channel 2 provides vertical deflection (Y-axis). Built-in Probe Adjust Square Wave A 2 V p-p, 1 kHz square wave generator permits probe compensation adjustment. Channel 2 (Y) Output A buffered 50W output of the channel 2 signal is available at the rear panel for driving a frequency counter or other instruments. The output is 50 mV/div (nominal) into 50W. Z-Axis Input Rear panel Z-Axis input allows intensity modulation. Supplied With Two Probes