BK PRECISION Model 2120

20 MHz Dual Trace Oscilloscope

THIS UNIT IS IN GOOD WORKING AND COSMETIC CONDITION.

FEATURES

Dual or single trace operation. 1 mV/div sensitivity. Auto/Norm triggered sweep operation with AC, TVH, TVV and Line coupling.Compact, low-profile design.

SPECIFICATIONS

VERTICAL AMPLIFIERS (CH1 and CH2) Sensitivity: 5 mV/div to 5 V/div in 1-2-5 sequence, 10 steps. Vernier control provides fully adjustable gain between steps and increases maximum sensitivity to 1mV/div (at reduced bandwidth). Accuracy:+-3%. Input Resistance: 1 M/ohm +-2%. Input Capacitance: 35 pF +-5pF. Frequency Response: 5 mV to 5 V/div (CAL): DC to 20 MHz (-3dB). 1 mV/div (uncalibrated): DC to 10 MHz (-3dB). Rise Time: 17.5ns. Operating Modes: CH 1: CH1, single trace. CH2: CH2, single trace. ALT: dual trace alternating. CHOP: dual trace chopped. ADD: algebraic sum of CH1 + CH2. Polarity Reversal: CH1 only. Max. Input Voltage: 400 V DC+AC peak. Max. Undistorted Amplitude: DC to 20 MHz: 4 divisions. DC to 10 MHz: 8 divisions.

SWEEP SYSTEM

Sweep Speed: 0.5 us/div to 0.2 s/div in 1-2-5 sequence, 18 steps. Vernier control provides fully adjustable sweep time between steps. Accuracy: +/- 3%. Sweep Magnification: 10X, +/- 6%.

TRIGGERING

Triggering Modes: AUTO (free run) or NORM. Triggering Source: CH1, CH2, LT, EXT, LINE. Max. Ext. Trigger Voltage: 200 V DC + Ac peak. Trigger Coupling: AC 30 Hz to 30 MHz. TV H used for triggering from horizontal sync pulses. TV used for triggering from vertical sync pulses.

HORIZONTAL AMPLIFIER

X-Y Mode: Switch selectable using X-Y switch. CH1: Y axis. CH2 X axis. Sensitivity: Same as vertical CH2. Accuracy: Y-axis +-3%. X axis: +-6%. Input Impedance: Same as vertical channel 2. Frequency response: DC to 2 MHz typical (-3dB). X-Y Phase Difference: Approximately 3% at 50 kHz. Max. Input Voltage: Same as vertical channel 2.

OTHER SPECIFICATIONS

Calibrating Voltage: 1 kHz (+- 10%) positive square. Wave, 0.2 V p-p (+ -2%). CH 1 Output (on rear panel). Output Voltage: 50 mV/div (into 50-ohm load). Output Impedance: Approximately 50 ohms. Frequency Response: 20 Hz to 10 MHz, -3dB, into 50 ohms. 20 Hz to 20 MHz, -6dB, into 1 m ohm. Trace Rotation: Electrical front panel adjustable. Power Requirements: 115 V/230 V +-10%, 50/60 Hz, approx. 35W. APROX Dimensions (WxHxD): 320 x 130 x 361mm (12.6 X5.1 X 14.2").Weight: 6.75 kg (15 lbs).

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