Universal Oscilloscope

CH1 and CH2 sensitivity

5mV/div~5V/div, 1-2-5 step, 10 calibratedsteps

5mV/div~10V/div, 10 calibratedsteps (1mV/div~1V/div at×5 MAG)

Accuracy

×1: ±3%, ×5: ±5%  (Vertical knob is set to CAL position)

Variable vertical sensitivity

To less than 1/2.5 times indicated sensitivity value

Frequency bandwidth ×5 MAG

DC:DC to 25MHz  AC:10Hz to 25MHz

DC:DC to 40MHz  AC:10Hz to 40MHz

DC:DC to 7MHz  AC:10Hz to 7MHz

DC:DC to 7MHz  AC:10Hz to 7MHz

20MHz bandwidth

AC:10Hz~20MHz -3dB  DC:DC-20MHz

Rising time

Approx. 14ns

Approx. 8.8ns

Input impedance

1MΩ±2%, 25pF ±3pF

Max.input voltage

400V(DC+ACpeak)

Input coupling system

AC-GND-DC

CH1 Output Amplifier

Output voltage

Min. 20mV/div

Output impedance

Approx. 50Ω

Bandwidth

50Hz to 5MHz (-3dB)

Time Axis

Sweep mode

×1, ×5, ×1, ×5ALT

Sweep time

0.1μs/div-0.2s/div, in 20 calibratedsteps (1-2-5 seq)

Sweep expansion

20ns/div-40ms/div

Alt. MAG TRACE

Max. 4 traces

Trace Sep. Var

Min. 1.5div

Trigger

Trigger mode

Normal, auto, TV-V, TV-H

Trigger source

INT, CH2, Line, EXT

Polarity

+, -

Coupling system

AC coupling

Freq.

INT

EXT

Freq.

INT

EXT

Freq.

INT

EXT

Sensitivity

NORM

10Hz-25MHz

1.5div

300mV

10Hz-40MHz

2div

800mV

10Hz-60MHz

2div

200mV

AUTO

20Hz-25MHz

1.5div

300mV

20Hz-40MHz

2div

800mV

20Hz-60MHz

2div

200mV

LOCK

50Hz-20MHz

2div

300mV

50Hz-20MHz

2div

800mV

50Hz-30MHz

2div

300mV

TV sync.

INT

Min.  1div

EXT

Min.  1Vp-p

3820 has ALT triggering, Amplitude≥3div, trigger frequency:50Hz-25MHz

X-Y operation

Operating mode

CH1, X-axis and CH2, Y-axis; When in X-Y operation mode

Sensitivity

As vertical axis

Input impedance

1MΩ±2%, 25pF ±3pF

X-axis bandwidth

DC~500kHz

Phase difference

≤3° (DC~50kHz)

Z-Axis

Input impedance

33kΩ

Max. input voltage

30V(DC+AC peak) , AC freq≤1kHz

Bandwidth

DC~2MHz

Input signal

±5V

Cal

Freq

1kHz±2%

Output level

0.5V (±2%)

Duty

≥48:52

Power supply

Voltage

AC 200V~240V

Frequency

50Hz/60Hz

Power consumption

35W

CRT

Type

6 inch square internal scale

Acceleratevoltage

-1.9kV

12kV

Effective screen

8div (vertical)×10div(horizontal)