HANTEK DSO2C20 (01) PDF Document

To avoid injury and prevent damage to your HANTEK DSO2C20, please follow these safety precautions:

Only professionally authorized personnel can perform repairs.

Use the right power cable. Use only the power cable approved for the country in which the product is used.

Connect and disconnect correctly. Before connecting the probe to the circuit being measured, connect the probe to the oscilloscope first. Before disconnecting the probe from the oscilloscope, disconnect the probe and the circuit under test first.

Ground the product. To avoid electric shocks, the product is grounded through the power cable’s grounding conductor. This must be connected to the ground before connecting any input or output terminals.

Connect the probe properly. The ground wire of the probe is at the same potential as the ground. Do not connect the ground wire to high voltage.

View all terminal rating values. To avoid fire or excessive current, check all rating values and signs on the product. Consult the product manual for details before connecting.

Do not operate with the cover open. Do not run the product with the cover or panel open.

Avoid circuit exposure. Do not touch exposed connectors and components after the power is switched on.

Do not operate if the product is suspected to be faulty. If you suspect damage, have it checked by qualified maintenance personnel.

Maintain proper ventilation.

Do not operate in a humid environment.

Do not operate in an inflammable or explosive environment.

Please keep the product surface clean and dry.

The HANTEK DSO2C20 series consists of the following models with their respective specifications:

After receiving the HANTEK DSO2C20 oscilloscope, please perform the following general examination:

Check the shipping package: Check for any damage caused by transportation. If the packaging cartons or protective foam pads are seriously damaged, keep them until the entire machine and accessories have passed electrical and mechanical testing.

Check the accessories: The details of the accessories are provided in Appendix A of the user manual. If any accessory is missing or damaged, contact the dealer responsible for this business.

Check the machine: If you find the instrument is damaged, not working properly, or unable to pass the performance test, contact the dealer responsible for this business.

Follow these steps to prepare your HANTEK DSO2C20 for use:

1. To Adjust the Supporting Legs: The machine has a bracket at the bottom. Adjust it to tilt the oscilloscope slightly upwards for better stability, observation, and operation. Close the bracket when not in use.

2. To Connect to AC Power: The AC power supply specifications are ~100-120V, 50/60/400Hz; ~100-240V, 50/60Hz; 50Watts MAX. Connect the oscilloscope to the power supply using the provided power cord. To avoid electric shock, ensure the instrument is correctly grounded.

3. Turn-on Checkout: With the machine properly plugged in, press the power button in the lower-left corner of the front panel. During startup, all button lights will illuminate for a few seconds as the oscilloscope performs self-checks. The startup screen will appear after the checks are complete.

Function Inspection:

1. Click on [Default Setup] in the button area to restore the oscilloscope to its factory settings.

2. Connect the grounding crocodile clamp wire of the probe to the grounding terminal.

3. Connect the probe to the input terminal of channel 1 and the compensation signal output terminal.

4. Set the probe attenuation ratio to X10 and click on the [AUTO SET] button.

5. Observe the screen to see if the square wave signal is displayed normally. Check CH2 using the same method. If the waveform is not displayed correctly, proceed to probe compensation.

Probe Compensation:

When connecting a probe for the first time, this adjustment is required to match the probe with the input channel. Uncompensated probes can lead to measurement errors.

1. Perform the first four steps of the “Function Inspection” section.

2. Compare the displayed waveform with the “Perfectly compensated,” “Over compensated,” and “Under compensated” examples.

3. If necessary, use a non-metallic screwdriver to adjust the variable capacitance on the probe until the waveform is “Perfectly compensated.” Repeat this step if needed.

Horizontal time base knob (SEC/DIV): Rotate this knob to modify the horizontal time base. Clockwise rotation reduces the time base (zooms in), and counterclockwise rotation increases it (zooms out). Pressing this knob switches between “coarse” and “fine” adjustment.

Horizontal displacement knob (POSITION): Rotate this knob to modify the horizontal displacement (trigger position). The trigger point moves left and right relative to the center of the screen. Pressing this knob resets the horizontal displacement to zero.

CH1 MENU and CH2 MENU: Press these buttons to turn the respective analog input channels on or off. The color of the button corresponds to the waveform color on the screen.

Channel vertical offset knob (POSITION): Rotate this knob to move the waveform up or down. Clockwise increases the offset, counterclockwise decreases it. Press the knob to reset the vertical offset to zero.

Channel vertical gear knob (VOLTS/DIV): Rotate this knob to change the vertical scale. Clockwise decreases the scale (volts per division), and counterclockwise increases it. Press the knob to switch between “coarse” and “fine” adjustment.

MATH MENU: Press this key to open the mathematical operation function menu, where you can perform A+B, A-B, A × B, A/B, and FFT operations.

Trigger knob (LEVEL): Rotate this knob to modify the trigger level. Clockwise rotation increases the level, and counterclockwise decreases it. The trigger level line moves up and down on the screen. Pressing this knob sets the trigger level to 50% of the waveform’s peak-to-peak value.

TRIG MENU: Press this button to open the trigger operation menu.

FORCE TRIG: Press this button to force the oscilloscope to generate a trigger signal, regardless of the trigger settings.

AUTO SET: Press this key to enable the automatic waveform setting function. The oscilloscope will automatically adjust the vertical gear, horizontal time base, and trigger mode for the best waveform display.

SINGLE SEQ: Press this key to set the triggering mode to single shot.

RUN/STOP: Press this key to start (“Run”) or stop (“Stop”) waveform acquisition. The key is backlit green in the RUN state and red in the STOP state.

SAVE/RECALL: Performs saving and retrieving functions.

MEASURE: Enters the measurement settings menu.

ACQUIRE: Enters the sampling settings menu to set time base mode, acquisition method, and storage depth.

UTILITY: Enters the system function settings menu for settings like sound and language, and advanced features like testing and self-calibration.

CURSOR: Enters the cursor measurement menu (manual and tracking modes).

DISPLAY: Enters the display settings menu to set display type, afterglow time, and waveform brightness.

DEFAULT SETUP: Restores the oscilloscope to its factory default settings.

HELP: Provides instructions for various function buttons and corresponding menu keys on the front panel.

SAVE TO USB: Saves a screenshot to a connected USB drive.

DECODE: Opens the decoding settings menu.

The help system provides instructions for various function buttons and menu keys. To use it:

1. Click the [Help] button in the button area to enter the help module.

2. Press any other key to get help information for that specific key.

3. Press the [Help] button again to exit the help module.

For example, pressing [Help] and then [UTILITY] will display the explanation menu for the UTILITY functions.

You can adjust the vertical system for each channel on the HANTEK DSO2C20 as follows:

To Enable or Disable the Analog Channel: Press the [CH1] or [CH2] button to turn the respective channel on or off. The button will light up when the channel is on.

To Adjust the Vertical Scale (V/div): Rotate the VOLTS/DIV knob for the selected channel. Clockwise decreases the scale, and counterclockwise increases it.

To Adjust the Vertical Offset: Rotate the POSITION knob for the selected channel to move the waveform up or down.

Channel Coupling: Press the channel button (e.g., [CH1]), then select the coupling menu to choose between “DC” (passes both AC and DC components), “AC” (blocks DC component), or “Grounded” (blocks both AC and DC components).

Bandwidth Limit: Press the channel button, then select the BW menu to limit the bandwidth (e.g., to 20MHz) to reduce noise.

Input Impedance: Press the channel button, then select the Impedance menu to choose between 1M Ω or 50 Ω.

Probe Ratio: Press the channel button, then select the Attenuation menu to set the probe ratio to match the probe you are using (e.g., 1X, 10X). This ensures correct amplitude readings.

Waveform Invert: Press the channel button, then select the inverting menu to turn waveform inversion on or off.

Fine tuning: Press the channel button, then select the Fine adjustment menu to switch between coarse and fine adjustment of the vertical gear for more detailed observation.

You can adjust the horizontal system on the HANTEK DSO2C20 as follows:

To Adjust the Horizontal Position: Rotate the horizontal POSITION knob to move the waveform trigger points left or right relative to the center of the screen.

To Adjust the Horizontal Time Base (s/div): Rotate the horizontal SEC/DIV knob to change the time value represented by each grid. This expands or compresses the waveform horizontally.

Pan or Zoom: After an acquisition is stopped, you can pan and scale the collected data to view details.

Delayed Sweep: Click the ZOOM button to horizontally magnify a segment of the waveform for detailed viewing. The screen will be divided into two display areas: the original waveform and the magnified waveform.

Horizontal Mode: Click the [HORIZ MENU] button to set the horizontal mode.

YT Mode: The standard mode where the Y-axis represents voltage and the X-axis represents time.

XY Mode: A mode where the X and Y axes both represent voltage levels, useful for Lissajous patterns to measure phase differences.

Roll Mode: For slow time base settings (100ms to 100s), the waveform scrolls from right to left to refresh the display.

Click the [Acquire] button to enter the sample system settings menu. From there you can configure the following:

Acquire Type: Choose between real-time sampling (uses real-time digital technology to collect waveforms) or equivalent sampling (reconstructs waveforms using equivalent sampling techniques).

Acquire Mode:

Normal Mode: The oscilloscope samples the signal at equal time intervals. This produces the best display for most waveforms.

Average Mode: The oscilloscope averages multiple waveforms to reduce random noise and improve vertical resolution. You can set the number of averages (4, 8, 16, 32, 64, 128).

Peak Mode: The oscilloscope collects the maximum and minimum values within a sampling interval to capture narrow pulses and avoid aliasing.

High Resolution: This mode averages adjacent points of a single sampled waveform to reduce random noise and produce a smoother display.

Memory Depth: This setting determines the number of waveform points stored in a single acquisition. A higher memory depth allows for a higher sample rate at slower time base settings.

Single channel mode options: 4K, 40K, 80K.

Full channel mode options: 4K, 40K.

Click the [TRIG MENU] button to access the trigger settings. A proper trigger setup converts unstable displays into meaningful, stable waveforms.

Trigger LEVEL: Use the trigger LEVEL knob to set the voltage level at which the trigger event occurs. The trigger flag on the screen moves up and down as you adjust it.

Trigger Source: In the trigger menu, select the Source to specify the signal to be used for triggering. Options include CH1, CH2, External (from the EXT TRIG terminal), and Line (AC power signal).

Trigger Mode:

Normal mode: The waveform is updated only when a valid trigger occurs.

Auto mode: The oscilloscope collects waveforms freely even without a valid trigger. When a valid trigger is detected, it completes a triggered acquisition.

Single mode: The oscilloscope waits for a valid trigger, completes one acquisition, and then stops.

Forced trigger: Pressing the FORCE TRIG button forces a trigger event.

Trigger Type: In the trigger menu, select the Type to define the trigger condition. Available types on the HANTEK DSO2C20 include Edge, Pulse, Video, Slope, Overtime, Window, Pattern, Interval, Under Amp, UART, LIN, CAN, SPI, and I2C.

Click the [Measure] button to enter the measurement menu. You can configure automatic measurements as follows:

1. Source: Select the source menu tab to choose the channel (CH1 or CH2) you want to measure.

2. Type: Select the type menu tab and use the V0 knob to choose from 32 different automatic measurements, such as Pk-Pk, Frequency, Average, RMS, Rise Time, Fall Time, etc.

3. All Measure: Select this option to display all available measurement items for the selected source on the screen simultaneously.

4. Statistics: Turn on the statistics function to display the current, average, minimum, maximum, root mean square error, and count for the opened measurement items.

5. Gate: Gate control measurement measures the waveform only between cursor A and B. This can only be opened when a measurement type is enabled.

6. DVM (Digital Voltmeter): Access the DVM menu to enable a digital voltmeter display for a channel. You can select the measurement type: DC RMS, AC RMS, or DC.

7. Clear All: This clears all measurement parameter statistical functions displayed on the screen.

Click the [Cursor] button to enter the cursor settings menu. Cursors are used to measure X-axis values (time/frequency) and Y-axis values (voltage).

Manual Mode:

1. In the cursor menu, select the Mode as manual.

2. Select the Source channel (CH1, CH2, MATH).

3. Select AX or BX to adjust the position of the vertical cursors (A and B) using the V0 knob.

4. Select AY or BY to adjust the position of the horizontal cursors (A and B) using the V0 knob.

5. A window on the screen will display the X and Y values at each cursor, as well as the delta (difference) between them.

Track Mode:

In this mode, the cursors automatically track points on the waveform.

1. Select the Mode as tracking.

2. Select the Source.

3. Adjust the horizontal position of cursor A (AX) or B (BX) using the V0 knob. The cursor marker will automatically “snap” to the waveform, and the corresponding Y-value will be displayed.

Click the [Display] button to enter the display settings menu. You can adjust the following:

Type: Select between Vector (connects sample points with lines) and Point (displays only sample points).

Intensity: Adjust the waveform brightness from 0% to 100% using the V0 knob.

Grid: Select the screen grid type: Dot, Line, or Close (no grid).

To Set the Grid Brightness: Adjust the grid brightness value from 0% to 100%.

To Set the Screen Brightness: Adjust the overall screen brightness value from 0% to 100%.

Persist: Set the afterglow time. Options are off, infinite, 1s, 5s, 10s, 30s. Infinite persistence is useful for capturing occasional events like noise and jitter, as old waveforms are not cleared but displayed at a lower brightness.

Click the [Utility] button to enter the system configuration menu. From here you can access:

Language: Switch between 14 languages.

Sound: Turn the operational sound on or off.

Update: Upgrade the oscilloscope firmware using a USB storage device.

Pass/Fail: Enter the Pass/Fail test function menu to monitor signal changes against a defined template.

System Info: Display the software version, hardware version, and serial number of the oscilloscope.

Calibrate: Run the self-calibration program to optimize the signal path for maximum measurement accuracy. This should be done after a significant temperature change (more than 5°C) and after the unit has warmed up for 20 minutes.

FrontPanel Selftest: Test the functionality of all buttons, knobs, and LED lights on the front panel.

Click the [Decode] button to enter the decoding settings menu. The HANTEK DSO2C20 supports UART, I2C, SPI, LIN, and CAN protocol decoding. The general procedure for each protocol is:

1. Bus Type: Select the protocol you want to decode (e.g., UART, I2C).

2. Source: Assign the oscilloscope channels (CH1, CH2) to the appropriate signal lines for the protocol (e.g., TX/RX for UART, SCL/SDA for I2C).

3. Protocol Parameters: Set the specific parameters for the chosen protocol, such as Baud Rate, Parity, Data Bits (for UART), or Idle Level.

4. Label Position: Adjust the vertical position of the decoded data on the screen using the V0 knob.

5. Display: Choose to display the decoded data synchronously with the waveform.

For each protocol, you will need to configure the settings to match the bus you are analyzing.

Click the [SAVE/RECALL] button to open the save/recall menu. You can save to internal memory or an external USB storage device.

Internal Save and Recall:

To Save: Select the Type (SetUp, Waveform, or Reference), then select Save To Internal. Choose a location (No. 1 to No. 9) and click Save.

To Recall: Select the Type, then select Recall From Internal. Choose the saved location and click Recall.

External Save and Recall (USB drive):

To Save: Select the Type (SetUp, Waveform, Reference, CSV, or Image). Select Save To External and click Save. You can also save a screenshot by pressing the [SAVE TO USB] shortcut key.

To Recall: Select the Type (SetUp, Waveform, or Reference). Select Recall From External, choose the file, and click Recall.

File Management (External only):

When saving to an external device, you can manage files.

New File: Create a new file or folder.

Delete File: Select a file or folder and press Delete.

Rename File: Select a file or folder and press Rename to change its name.

Auto Scale: Press the [Auto Scale] button. The HANTEK DSO2C20 will automatically recognize the waveform type and adjust controls like vertical scale, horizontal scale, and trigger settings to display the input signal clearly.

Default Setup: Press the [Default Setup] button. This will restore the oscilloscope to a known default configuration. The settings for this default state are as follows:

Table: Default Setup Settings

The models of the HANTEK DSO2C20 with a signal source have a built-in Arbitrary Waveform Generator. Here is how to use its functions:

Output Waveform Type:

1. Press [WAVE GEN] to enter the signal generator settings.

2. Select the Wave menu tab to choose the waveform: Sine, Square, Ramp, Exp, Noise, DC, or Arb1-Arb4.

3. Adjust parameters like Frequency, Amplitude, Offset, and Symmetry/Duty cycle using their respective menus and the V0 knob.

4. Set the output Impedance to high impedance or 50 Ω.

Modulation:

1. Press [WAVE GEN] to enter the modulation settings.

2. Select the Type menu to choose amplitude modulation (AM) or frequency modulation (FM).

3. For both AM and FM, you can set the Modulation waveform (sine, square, triangular), Modulation frequency, and Modulation depth (for AM) or Deviation (for FM).

Burst:

1. Press the [Burst] button to enter the burst setting menu.

2. Select the Type of burst: N cycle (outputs a specific number of cycles upon receiving a trigger) or Infinite (outputs a continuous waveform upon receiving a trigger).

3. For N cycle, use the count menu to set the number of cycles.

4. Use the Trigger menu to manually output the pulse train.

You can remotely control the HANTEK DSO2C20 from a PC using IO software. Before starting, ensure the instrument is turned off before connecting the communication cable to avoid damage.

1. Connect the device: Connect the oscilloscope’s USB DEVICE interface to a USB HOST interface on your PC using a USB data cable.

2. Install USB driver: After connecting the oscilloscope to the PC for the first time and turning it on, the PC will automatically install the necessary driver.

3. Search for device resources: Open your IO software on the PC. The software will automatically search for connected resources. You can also manually rescan.

4. View Device Resources: The oscilloscope will appear in the USB directory, showing its model, serial number, and version information.

5. Control the instrument remotely: Use the “Interactive IO” or a similar feature in your software to open a remote command control panel. From here, you can send SCPI commands to control the oscilloscope and read data back.

If your HANTEK DSO2C20 does not turn on, follow these steps:

1. Check if the power cord on the side of the oscilloscope is connected properly.

2. Check if the power switch is pressed.

3. After completing the above checks, restart the instrument.

4. If the oscilloscope still cannot be turned on normally, please contact your local dealer or Hantek technical support.

If you see a seriously distorted input signal, check the following:

1. Check if the oscilloscope probe is properly connected to the BNC channel.

2. Check if the probe is properly connected to the circuit being measured.

3. Check if the oscilloscope probe is calibrated properly. If it is not calibrated, follow the instructions in the manual for probe compensation.

If no signal appears on the screen, please try these troubleshooting steps:

1. Check if the probe is properly connected to the BNC connector of the signal input channel.

2. Check if the channel is open (check the CH1/CH2 menu buttons).

3. Check if there is signal output from the tested signal channel.

4. If it is a DC signal with a relatively large amplitude, you may need to increase the amplitude range (adjust VOLTS/DIV).

5. You can press the [Auto Scale] button to automatically detect the signal first.

6. If there is still no waveform display, please contact Hantek technical support.

If the oscilloscope cannot recognize your USB flash drive, follow these steps:

1. Check if the USB flash drive is functioning properly in another device.

2. Confirm the capacity of the USB flash drive. It is recommended to use a drive that does not exceed 16GB.

3. Confirm that the format of the USB flash drive is FAT32.

4. Turn the oscilloscope off and on again, then insert the USB drive for inspection.

5. If you still cannot use the USB drive, please contact Hantek technical support.

If you are unable to get a stable trigger, check the following:

1. Check if the triggering data source in the trigger menu is consistent with the signal input channel (e.g., if the signal is on CH1, the trigger source should also be CH1).

2. Check if the trigger level is adjusted correctly. You can press the trigger LEVEL knob to reset the trigger level to the signal’s center point (50%).

3. Check if the triggering method is correct for your signal. The default is edge triggering. For different input signals, the triggering method may need to be changed to a more suitable type (e.g., Pulse, Video).