B&K Precision 2120B User Manual
Data Sheet
30 MHz Dual Trace Analog Oscilloscope With Probes
Model 2120B
B&K Precision's model 2120B is a dual trace oscilloscope
that offers high performance at a low price. Most competitor's entry level oscilloscopes have a 20 MHz bandwidth,
while B&K Precision's models 2120B has a bandwidth of
30 MHz. 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.
■ Dual or single trace operation
■ 5 mV/div sensitivity
■ AUTO/NORM triggered sweep operation with AC,
TVH, TVV and line coupling
■ Compact low profile design
■ cUL certified
Sp e cificat i ons 21 2 0 B
VERTICAL AMPLIFIERS (CH 1 and CH 2)
ensitivity
S
ttenuator
A
Accuracy ±3%, ±5% at X5
Input Resistance 1 MΩ ±2%
nput Capacitance
I
Frequency Response 5 mV to 5 V/div: DC to 30 MHz (-3dB). X5: DC to 10 MHz (-3dB)
Rise Time 12 ns (Overshoot ≤5%)
perating Modes
O
CH 2 CH 2, single trace
ALT dual trace, alternating
HOP
C
DD
A
Polarity Reversal CH 2 only
Maximum Input Voltage 400 V (DC + AC peak)
WEEP SYSTEM
S
Sweep Speed
Accuracy ±3%
weep Magnification
S
TRIGGERING
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
Auto Bandwidth:100 Hz-30 MHz, Internal: 1.5 div, External: 100 mV
Norm Bandwidth: DC to 30 MHz, Internal: 1.5 div, External: 100 mV
TV V Bandwidth: 20 Hz-1 kHz, Internal: .5 div, External: 100 mV
TV H Bandwidth:1 kHz-100 kHz, Internal: .5 div, External: 100 mV
HORIZONTAL AMPLIFIER (Input through channel 2 input)
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
CRT
Type Rectangular with internal graticule
Display Area 8 x 10 div (1 div = 1 cm)
Accelerating Voltage
Phosphor P31
Trace Rotation Electrical, front panel adjustable
Calibrating Voltage 1 kHz (±10%) Positive Square Wave, 2 V p-p (±3%)
GENERAL
Temperature
Power Requirements 100/120/220/240 VAC ±10%, 50/60 Hz, approximately 40 W.
Dimensions (WxHxD) 7 x 14.5 x 17.25" (180 x 370 x 440 mm)
Weight Approximately 17.2 lbs (7.8 kg)
0 steps in 1-2-5 sequence. Vernier control provides full adjustment between steps
1
mV/div to 5 V/div, 1 mV/div to 1 V/div at X5
5
5 pF ±10pF
2
H 1: CH 1, single trace
C
ual trace, chopped
d
gebraic sum of CH 1 + CH 2
a
.1 µs/div to 2 s/div in 1-2-5 sequence, 23 steps,
0
Vernier control provides fully adjustable sweep time between steps.
0x
1
2 kV
Within Specified Accuracy: 50˚ to 95˚F (10˚ to 35˚C), ≤85% RH
Full Operation: 32˚ to 104˚F (0˚ to 40˚C), ≤85% RH
Storage: -4˚ to 158˚F ( -20˚ to +70˚C
Two Year Warranty
Supplies Accessories
Optional Accessories
Instruction Manual, Two PR-33A x1/x10 Probes or equivalent,
AC Power Cord, Spare Fuse
PR-32A Demodulator Probe, PR-37A x1/x10/REF. Probe, PR-100A x100 Probe,
PR-55 High Voltage x1000 Probe, LC-210A Carrying Case
Technical data subject to change
© B&K Precision Corp. 2012
v013012
www.bkprecision.com
Tel.: 714.921.9095
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