# DSO138 Digital Oscilloscope, Assembled

> DSO138 Digital Oscilloscope, fully assembled, based on ARM Cortex-M3 STM32F103C8, with 2.4 inch color TFT display. Maximum real-time sampling rate 1Msps, accuracy 12Bit, analog bandwidth 0-200KHz, vertical sensitivity 10mV/Div-5V/Div, input impedance 1MΩ. Power supply 9VDC. Includes 1Hz/3.3V test signal, trigger modes and HOLD function. Can also be used as an ARM development board. Hobby-grade product.

- Page: https://sigmanortec.ro/en/dso138-digital-oscilloscope-assembled
- Price: 172.21 RON
- Availability: In stock; 1-2 zile
- Reference: 9452 · EAN: 5944649360659
- Category: Electronic components > Testing and Measurement > Multimeters and Oscilloscopes
- Package (shipping data): 0.133 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 04:32 (Europe/Bucharest)

## Description

Fully assembled hobby digital oscilloscope, ideal for quick signal verification and benchtop troubleshooting. Based on ARM Cortex-M3 STM32, with 2.4 inch color TFT display, sampling up to 1Msps and analog bandwidth 0-200kHz, offers trigger modes and HOLD function for stable captures, includes 1Hz 3.3V test signal and can also be used as an ARM development board.
DSO 138 digital oscilloscope.
The product comes fully assembled.
The oscilloscope uses the ARM Cortex-M3 processor (STM32F103C8), includes a 2.4" color TFT display and can also be used as an ARM development board.
The DSO138 oscilloscope is a hobby product and its performance is not comparable to that of a professional oscilloscope, which is why small noises may appear in the signal reading.
Specifications:
Supply voltage: 9VDC
Maximum sampling rate in real time: 1Msps
Accuracy: 12Bit
Sampling buffer depth (Sampling Buffer Depth): 1024 bytes
Analog Bandwidth: 0-200KHz
Vertical Sensitivity: 10mV / Div - 5V / Div (1-2-5 progressive mode)
Input Impedance: 1MΩ
Maximum input voltage (Maximum Input Voltage): 50Vpp (1:1 samples), 400Vpp (10:1 samples)
Coupling Modes: DC / AC / GND
The Horizontal Time Base Range (The Horizontal Time Base Range): 10us / Div - 50s / Div (1-2-5 progressive mode)
Dimensions mm: 117 x 76mm
See Instructions here
Manufacturer description:
With automatic, regular and one-shot modes, easy to capture the moment waveform.
Available rising or falling edge trigger.
Observable previous trigger waveform (negative delay).
Can freeze at any time waveform display (HOLD function).
Comes 1Hz /3.3V square wave test signal source.
With waveform parameter digital display, including frequency, period, pulse width, duty ratio, MAX./MIN./AVG./Peak-Peak/virtual values.
Waveform storage function: will not lose the waveform after power off.
Short-circuit and open-circuit detection: can help the user find out the soldering error.
TFT controller recognition function.