BK Precision 30 MHz 2-Trace Scope with Probes

Entry Level Oscilloscope with a 30 MHz Bandwidth

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What's special about this O-scope?

  • One of the most widely used devices by electrical specialists for its diverse applications
  • Displays voltage on its vertical axis, any other quantity that can be converted to a voltage can be displayed as well
  • Vertical input channels allow you to display two waveforms at the same time for greater accuracy and measurement
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BK Precision's 2120B is a dual trace oscilloscope that can simultaneously display two signals and offer high performance at a low price. The auto sweep feature allows the unit to go back to triggered sweep operation once the adequate trigger is applied. The trigger sweep is an oscilloscope's most important function, because it serves to synchronize the sweep oscillator to the input waveform.


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BK-2120B BK Precision 30 MHz 2-Trace Scope with Probes 7"W x 14.5"H x 17.25"D 17.5 lbs
  • Equipped with a 8x10 cm CRT display for easy viewing
  • Most comparable products offer 20MHz but this unit offers more advanced technology with a 30MHz bandwidth
  • Four sweep modes for versatility and function:
    • Sweep only
    • Delayed sweep only
    • Main sweep
    • Delayed sweep sharing or X-Y
  • Dual or single trace operation 5 mV/div sensitivity
  • AUTO/NORM triggered sweep operation with AC, TVH, TVV and line coupling
  • Instead of just knowing there is current, you can actually see how the electrical component is operating via a visible sine wave
  • Calibrated 23-step time base with 10x magnifier for accuracy
  • Compact low-profile design
  • 2- year manufacturer’s warranty


Vertical Amplifiers (CH1 and CH2)
Sensitivity 5 mV/div to 5 V/div, 1 mV/div to 1 V/div at X5
Attenuator 10 steps in 1-2-5 sequence. Vernier control provides full adjustment between steps
Accuracy +-3%, +-5% at X5
Input Resistance 1 MΩ +- 2%
Input Capacitance 25 pF +- 10pF
Frequency Response 5 mV to 5 V/div: DC to 30MHz (-3 dB). X5: DC to 10 MHz (-3 dB)
Rise Time 12 ns (Overshoot <= 5%)
Operating Modes CH 1: CH 1, single trace
CH 2 CH 2, single trace
ALT dual trace, alternating
CHOP dual trace, chopped
ADD algebraic sum of CH 1 + CH 2
Polarity Reversal CH 2 only
Maximum Input Voltage 400 V (DC + AC peak)
Sweep System
Sweep Speed 0.1 us/div to 2s/div in 1-2-5 sequence, 23 steps. Vernier control provides fully adjustable sweep time between steps
Accuracy +-3%
Sweep Magnification 10x
Triggering Modes AUTO (free run) or NORM, TV-V, TV-H
Trigger Source CH 1, CH 2, ALT, EXT, LINE
Maximum External Trigger Voltage 300 V (DC + AC peak)
Trigger Coupling AC 30 Hz to 30 MHz
TV H Used for triggering from horizontal sync pulses
TV V Used for triggering from vertical sync pulses
Trigger Sensitivity
Coupling Bandwith Int Ext
Auto 100 Hz - 30 MHz 1.5 div 100 mV
Norm DC to 30 MHz 1.5 div 100 mV
TV V 20 Hz-1 kHz 5 div 100 mV
TV H 1 kHz-100 kHz 0.5 div 100 mV
Horizontal Amplifier (Input through channel 2 imput)
X-Y Mode Switch selectable using X-Y switch. CH 1: X axis
CH 2 Y axis
Sensitivity Same as vertical channel 1
Input Impedance Same as vertical channel 1
Frequency Response DC to 1 MHz typical (-3 dB)
X-Y Phase Difference Approximately 3" at 50 kHz
Maximum Input Voltage Same as vertical channel 1
Type Rectangular with internal graticule
Display Area 8x10 div (1 div = 1 cm)
Accelerating Voltage 2 kV
Phosphor P31
Trace Rotation Electrical, front panel adjustable
Other Specifications
Calibrating Voltage 1 kHz (+-10%) Positive Square Wave, 2 V p-p (+-3%)
Within Specified Accuracy 50°F to 95°F (10°C to 35°C), <= 85% RH
Full Operation 32°F to 104°F (0°C to 40°C), <= 85% RH
Storage -4°F to 158°F (-20°C to 70°C)
Power Requirements 100/120/220/240 VAC +- 10%, 50/60 Hz, approximately 40 W
Dimensions 7"W x 14.5"H x 17.25"D (180 x 370 x 440 mm)
Weight Approximately 17.2 lbs. (7.8 kg)
Warranty 2-years
Supplied Instruction Manual, Two PR-33A x1/x10 Probes or equivalent, AC Power Cord, Spare Fuse







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