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DSO Nano Manual v1.0b


Intro

DSO mobile is a pocket size digital storage oscilloscope fulfills basic electronic engineering requirements. It is base on ARM CortexTM-M3 compatible 32 bit platform, equipped with 320*240 color display, SD card capability, USB connection, and chargeable batteries.

Features:


Specification

Display2.8" Color TFT LCD
Display Resolution320×240
Display Color65K
Analog bandwidth0 - 1MHz
Max sample rate1Msps 12bits
Sample memory depth4096 Point
Horizontal sensitivity1uS/Div ~ 10S/Div (1-2-5 Step)
Horizontal positionadjustable with indicator
Vertical sensitivity10mV/Div ~ 10V/Div (with ×1 probe)
0.5V/Div ~ 10V/Div (with ×10 probe)
Vertical positionadjustable with indicator
Input impedance>500KΩ
Max input voltage80Vpp (by ×1 probe)
CouplingDC
Trig modesAuto, Norma, Single, None and Scan
Functionalities:
  • Automatic measurement: frequency, cycle, duty, Vpp,Vram, Vavg and DC voltage
  • Precise vertical measurement with markers
  • Precise horizontal measurement with markers
  • Rising/falling edge trigger
  • Trig level adjustable with indicator
  • Trig sensitivity adjustable with indicator
  • Hold/run feature
Test signalBuilt-in 10Hz~1MHz (1-2-5 Step)
Waveform storageSD card
PC connection via USBas SD card reader
Upgrade by bootloadervia USB
Power supply3.7V Chargeable Lithium battery / USB
Dimension (w/o probe)105mm X 53mm X 8mm

Instructions

User interface


Basic usage

The UI could be divided to 4 parts: main menu (top), functions (right column), status bar (bottom), and waveform & markers displays. Use cursor ▲ , ▼ , ◄ , ► to navigate among the three operational parts and make adjustments.

Waveform & Markers

Green waveform - current signal being monitored

Purple waveform – reference waveform loaded from SD card.

Voltage measure marker V1 and V2 (Dot, vertical) – A voltage measure value between V1-V2 could be displayed.

Time measure marker A and B (Dot line, horizontal) – A time measure value between A and B could be displayed.

Y positions marker (Purple) – Y position center line for adjustment reference

Trigger level marker (Yellow) – Used to set trigger level

Menu

Horizontal main menu on top of screen, Navigate by ◄ , ►, adjust by ▲ , ▼

Sync. Mode: When blinking, press ▲ and ▼ to select 4 different synchronization mode: AUTO, NORM, SING, and NONE.

Vertical Scale: When blinking, press ▲ and ▼ to select different level of sensitivity. Total 19 scales are optional from 10mV/Div to 100V/Div. Note 1: If you use scale above 20V/Div, please use probe with attenuation of 10:1). Note 2: If newly set scale does not match reference waveform, the latter will be cleared.

Horizontal sensitivity: When blinking, press ▲ and ▼ to select different sensitivities, from 1uS/Div to 10S/Div total 22 grades. Note 2: If newly set sensitivity does not match reference waveform, the latter will be cleared.

Y position: When blinking, press ▲ and ▼ to adjust the vertical position of the waveform. Press M to hide/activate Y position marker if needed.

Calculation Mode: Auto calculation modes include:

Power supply mode: Power supply by internal battery or USB port. Battery bar will be displayed when powered from internal.

Functions

Vertical function buttons on side of screen, Navigate by ▲ , ▼ adjust by ◄ , ►

Trigger sensitivity: When blinking, press ◄ and ► to adjust trigger sensitivity, trigger level marker (Yellow dotted area) changes correspondingly.

Trigger Type: When blinking, press ◄ and ► to choose trigger mode of rising edge or falling edge.

Probe attenuation scale: When blinking, press ◄ and ► to choose 1:1 or 1:10 probe.

Save waveform: When blinking, status bar will display “ Save Filexxx”, press ◄ and ► to select file name with xxx = 000-255. Press M to save current waveform on display to SD card.

Load waveform: When blinking, status bar will display “ Save Filexxx”, press ◄ and ► to select file name with xxx = 000-255. Press M to load current waveform to display from SD card.

Note: current version has no file creation function, a FILEXXX.DAT must be prepared by connecting to PC by USB.

Ref. square wave freq.: When blinking, press ◄ and ► to adjust the frequency of reference square wave.

Horizontal position adj.: When blinking, press ◄ and ► to scroll waveform horizontally.

Index Bar: Show current display position of total loaded wavefrom

Status Bar

Time markers.: When blinking, press ◄ and ► to adjust T1 or T2 time measure marker, the time difference ∆T=T1-T2 will be displayed.

Voltage markers: When blinking, press ◄ and ► to adjust V1 or V2 time measure marker, the Voltage difference ∆V=V1-V2 will be displayed.

Trigger level: When blinking, press ◄ and ► to adjust trigger level, trigger level marker (Yellow dotted line) changes correspondingly.

Save Settings

Hold “R/S” Button and press “M” button to save current settings as default.

Firmware upgrade

It’s easy to upgrade firmware with USB bootloader.

1. Download “DfuSe USB Device Firmware Upgrade” from http://www.st.com/stonline/products/support/micro/files/um0412.zip and install. Instruction available at http://www.st.com/mcu/familiesdocs-110.html#Application%20Note.

2. Connect Oscilloscope with PC, press and hold – , switch on power, until oscilloscope displays:

"Please Connect to USB Host!"
"DS0201 Device Firmware Upgrade Ver 1.0"

When PC connection is detected,

"Firmware Upgrading..."
"Please Wait"
"DS0201 Device Firmware Upgrade Ver 1.0"

3. Run “Dfuse Demo” on PC, check (1 , select firmware to be uploaded (e,g."DS0201_FW_V2.00.DFU") at (2)

4. In the next screen, press (1) "Upgrade", when upgrade finishes successfully, status bar will notify (2)

5. Shut down and reactivate power to use new firmware.