Digital Oscilloscope Dual Trace/Channel, 20MHz

Code: 241-551

The 241-551 is a 2-channel, 20MHz, economical type digital oscilloscope. This oscilloscope features a 7″ high resolution LCD colour display, front-sided USB CI design and ultra-thin device body.

2 in stock!

£301.67   excl. VAT

2 in stock (can be backordered)

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The 241-551 is a 2-channel, 20MHz, economical type digital oscilloscope. This oscilloscope features a 7" high resolution LCD colour display, front-sided USB CI design and ultra-thin device body.

  • Large 7" high resolution LCD display (800x480)
  • Friendly UI interaction - easy-accessible operation menu ensures users retrieve results conveniently
  • Windows extension facilitates the observation of abnormal signal from full waveforms
  • 30 auto-measurement options
  • DC, AC and GND input couplings
  • 8 bit vertical resolution (A/D) (2 channels simultaneously)
  • 5mV/div - 5V/div vertical sensitivity (at input)
  • Edge & video trigger types
  • Auto, normal and single trigger modes
  • Dimensions - 301x152x70mm
  • Device weight - 1.1kg
  • Contents Digital Storage Oscilloscope, 2x 60MHz Probes, Probe Manual, Accessories Bag, Operating Instructions, CD-ROM, UK & EU Power Cords
( 241-551 )

Technical Specifications

Bandwidth:                                        20 MHz

Channel:                                             2


Acquisition Mode:                            Normal, Peak detect, Averaging

Sample rate:                                      100 MS/s


Input coupling:                                              DC, AC , Ground

Input impedance:                              1 MΩ±2%, in parallel with 20 pF±5 pF

Input coupling:                                              1X10X100X1000X

Max. input voltage:                           400V (DC+AC, PK - PK)

Channel–channel isolation:             50Hz: 100 : 1

10MHz: 40 : 1

Time delay between channel:                      150ps


Sampling rate range:                                    0.5 S/s100 MS/s

Interpolation:                                     (Sinx)/x

Max Record length:                          10K

Scanning speed (S/div):                               5 ns/div – 1000 s/div, step by 1 – 2 – 5

Sampling rate/relay time accuracy:            ±100 ppm

Interval(T) accuracy (DC - 100MHz):       Single±(1 interval time+100 ppm×reading+0.6 ns);

                                                            Average>16 ±(1 interval time +100 ppm×reading+0.4 ns)


Vertical Resolution (A/D):                8 bits (2 channels simultaneously)

Sensitivity:                                         5 mV/div5 V/div

Displacement:                                               ±2 V (5 mV/div – 100 mV/div)

±50 V (200 mV/div – 5 V/div)

Analog bandwidth:                           20 MHz

Single bandwidth:                             Full bandwidth

Low Frequency:                                            ≥10 Hz (at input, AC coupling, -3 dB)

Rise time (at input, Typical):                       ≤ 17.5 ns

DC gain accuracy:                            ±3%

DC accuracy (average):                   Delta Volts between any two averages of ≥16 waveforms acquired with the same scope setup and ambient conditions (V): ±(3% reading + 0.05 div)


Cursor:                                                           V, T, T&V between cursors, auto cursor

Automatic:                                         Period, Frequency, Mean, PK-PK, RMS, Max, Min, Top, Base, Amplitude, Overshoot, Preshoot, Rise Time, Fall Time, +Pulse Width, -Pulse Width, +Duty Cycle, -Duty Cycle, Delay A→B , Delay A→B , Cycle RMS, Cursor RMS, Screen Duty, Phase, +Pulse Count, -Pulse Count, Rise Edge Count, Fall Edge Count, Area, and Cycle Area.

Waveform Math:                               , , *, / ,FFT

Waveform storage:                           16 waveforms

Lissajous figure:                               Full bandwidth

Communication port:                       USB 2.0 (USB storage)

Counter:                                             Support


Trigger level range:                          Internal, ±5 div from the screen center

Trigger level Accuracy (typical):     Internal, ±0.3 div

Trigger displacement:                      According to Record length and time base

Trigger Holdoff range:                     100 ns – 10 s

50% level setting (typical):              Input signal frequency ≥ 50 Hz

Edge trigger:                                     Slope - Rising, Falling

Video Trigger Modulation:              Support standard NTSC, PAL and SECAM broadcast systems

Video Trigger Line number range: 1-525 (NTSC) and 1-625 (PAL/SECAM)



Display Type:                                    7" Coloured LCD (Liquid Crystal Display)

Display Resolution:                          800 (Horizontal) × 480 (Vertical) Pixels

Display Colours:                               65536 colours, TFT screen


Output Voltage (Typical):                About 5 V, with the Peak-to-Peak voltage ≥1 MΩ.

Frequency (Typical):                        Square wave of 1 KHz


Mains Voltage:                                  100 - 240 VACRMS, 50/60 Hz, CAT

Power Consumption:                       < 15 W

Fuse:                                                   2 A, T class, 250 V


Temperature:                                     Working temperature: 0 - 40

Storage temperature: -20 - 60

Relative Humidity:                            ≤ 90%

Height:                                                            Operating: 3,000 m

Non-operating: 15,000 m

Cooling Method:                               Natural cooling


Dimension:                                        301 mm× 152 mm×70 mm (L*H*W)

Weight:                                               1.1 kg



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99% of orders will be dispatched same working day
Some goods, because of their size, weight and supply route will incur a larger delivery cost and will have a longer lead time. Edulab will contact you to inform you of this.
Customers from Europe and the rest of the world will have delivery calculated at checkout.We reserve the right to contact the customer prior to dispatch of goods to inform of a change in cost of delivery.