HANTEK DSO2C35 (01) PDF Document

To ensure safe operation of your HANTEK DSO2C35, please adhere to the following safety precautions:

Repairs: Only professionally authorized personnel should perform repairs.

Power Cable: Use only the power cable approved for the country in which the product is used.

Connections: Before connecting a probe to a circuit, first connect the probe to the oscilloscope. Before disconnecting the probe from the oscilloscope, first disconnect the probe from the circuit under test.

Grounding: The product is grounded through the power cable’s grounding conductor to prevent electric shock. Ensure the product is properly grounded before connecting any input or output terminals.

Probe Connection: The ground wire of the probe is at ground potential. Do not connect the ground wire to a high voltage.

Terminal Ratings: To avoid fire or excessive current, check all rating values and signs on the product before making connections.

Operation with Cover: Do not operate the product with the cover or panel open.

Exposed Circuits: Avoid touching exposed connectors and components when the power is on.

Suspected Faults: If you suspect the product is damaged, have it inspected by qualified maintenance personnel.

Ventilation: Maintain proper ventilation around the instrument. Provide at least 10 cm of clearance beside, above, and behind the instrument.

Environment: Do not operate in humid, inflammable, or explosive environments. Keep the product surface clean and dry.

Care:

Do not expose the LCD to direct sunlight for a long time when storing or placing the oscilloscope.

Cleaning:

To clean the outer surface of the instrument and probe, follow these steps:

1. Use a lint-free cloth to remove dust from the outside of the oscilloscope and probe. Be careful to avoid scratching the display filter.

2. Clean the oscilloscope with a soft cloth soaked in water. For a more thorough cleaning, use an aqueous solution of 75% isopropyl alcohol.

Note: To avoid damaging the surface of the oscilloscope or probe, do not use any corrosive or chemical cleaning agents.

Warning: Before powering on the device again, ensure it is completely dry to avoid electrical short circuits or personal injury caused by moisture.

The HANTEK DSO2C35 digital oscilloscope offers the following features:

• Support for 1MΩ/50Ω impedance switching to ensure signal integrity.

• A sampling rate of 2GSa/s with a maximum bandwidth of 350MHz.

• A built-in arbitrary waveform generator that outputs 5 standard waveforms, supports custom arbitrary waveform output, and burst output.

• Protocol Trigger with five standard serial protocol triggers and decoding, including UART, LIN, CAN, SPI, and IIC.

• 32 automatic measurement and threshold measurement functions, with test results supporting statistical analysis.

• Two sets of digital voltmeter functions and hardware frequency meter functions.

• Standard SCPI remote control instructions.

• Save and export functions for settings, CSV, images, reference waveforms, and waveforms.

• Four sampling methods: normal, average, peak, and high-precision.

• Support for 14 operating languages.

• Two cursor measurement modes: manual and tracking, with Math function support for cursor measurement.

• Vertical measurement range from 500uV to 10V, with 300V CAT II withstand voltage input.

• FFT scale display for convenient reading of results.

• Manual, single time, and one-click AUTO measurement for simple and fast waveform measurement.

• XY mode with dual window display to easily understand waveform phase changes.

After receiving your HANTEK DSO2C35, please perform the following checks:

1. Check the shipping package: Inspect the packaging cartons and protective foam pads for any serious damage caused by transportation. Keep them until the machine and accessories pass electrical and mechanical testing.

2. Check the accessories: Verify that all accessories listed in Appendix A of the user manual are present and undamaged.

3. Check the machine: If you find the instrument is damaged, not working properly, or fails to pass the performance test, contact your dealer.

1. Adjust the Supporting Legs: The oscilloscope has a bracket at the bottom. Adjust it to tilt the oscilloscope slightly upwards for better stability and easier observation.

2. Connect to AC Power: Use the provided power cord to connect the oscilloscope to a suitable AC power supply (~100-240V, 50/60Hz). Ensure the instrument is correctly grounded to avoid electric shock.

3. Turn-on Checkout: Press the power button on the lower left of the front panel. The oscilloscope will perform a series of self-checks, and the startup screen will appear upon completion.

Follow these steps to inspect the basic functions of your HANTEK DSO2C35:

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

2. Connect the probe’s grounding crocodile clamp to the grounding terminal on the front panel.

3. Connect the probe to the input terminal of channel 1 (CH1) and also to the compensation signal output terminal (marked with ≈ 5V@1KHz).

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

5. Observe the screen to see if a square wave signal is displayed normally. The display should show a clean square wave.

6. Repeat the same method for the CH2 channel. If the square wave is not displayed correctly (e.g., overcompensated or undercompensated), you need to perform a probe compensation.

When connecting a probe to an input channel for the first time, you must perform this adjustment to match the probe to the channel. An uncompensated probe can lead to measurement errors.

1. Perform the first four steps of the “Function Inspection” procedure (connect the probe to the compensation signal output).

2. Compare the waveform on the screen with the ideal “Perfectly compensated” square wave. If it is “Over compensated” (overshoot) or “Under compensated” (rounded corners), it needs adjustment.

3. Use a non-metallic screwdriver to adjust the variable capacitance on the probe until the waveform on the screen is perfectly compensated. Repeat if necessary.

The front panel of the HANTEK DSO2C35 includes several control systems:

Horizontal Control System:

• Horizontal Time Base Knob (SEC/DIV): Rotate to modify the horizontal time base (time per division). Clockwise decreases the time base (zooms in), and counter-clockwise increases it (zooms out). Press the knob to switch between coarse and fine adjustment.

• Horizontal Position Knob (POSITION): Rotate to move the waveform left and right. This adjusts the trigger displacement. Press the knob to reset the horizontal position to zero.

Vertical Control System:

• CH1/CH2 MENU Buttons: Press to turn the respective channel on or off and access its menu. The button color corresponds to the waveform color.

• Vertical Position Knobs: Rotate to move the waveform for the corresponding channel up and down. Press to reset the vertical offset to zero.

• Vertical Scale Knobs (VOLTS/DIV): Rotate to change the vertical scale (volts per division). Clockwise decreases the scale, and counter-clockwise increases it. Press to switch between coarse and fine adjustment.

• MATH MENU Button: Press to open the mathematical operation function menu (A+B, A-B, A*B, A/B, FFT).

Trigger Control System:

• Trigger Level Knob: Rotate to adjust the trigger level up or down. Press to set the trigger level to 50% of the waveform’s peak-to-peak value.

• TRIG MENU Button: Press to open the trigger operation menu.

• FORCE TRIG Button: Press to force the oscilloscope to generate a trigger signal.

Wave Gen (Signal Generator):

• WAVE GEN Button: Press to open the signal generator channel menu.

• BURST Button: Accesses the burst function menu.

Quick Keys for Operating Mode:

• AUTO SET: Automatically adjusts vertical, horizontal, and trigger settings for an optimal display.

• SINGLE SEQ: Sets the trigger mode to single shot.

• RUN/STOP: Starts or stops waveform acquisition.

Menu Function Buttons:

• SAVE/RECALL: Accesses the save and recall menu.

• MEASURE: Opens the measurement settings menu.

• ACQUIRE: Opens the sampling settings menu.

• UTILITY: Opens the system function settings menu.

• CURSOR: Enters the cursor measurement menu.

• DISPLAY: Opens the display settings menu.

Function Shortcut Keys:

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

• HELP: Accesses the built-in help system.

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

• DECODE: Opens the protocol decoding settings menu.

Multi-Functional Knob: Used to modify parameters within the various on-screen menus.

The rear panel of the HANTEK DSO2C35 contains the following components:

1. USB DEVICE: This interface is used to connect the oscilloscope to a computer for remote control via SCPI commands or upper computer software.

2. Power Socket: The power input terminal. Connect the provided power cord here.

3. Handle: Pull up the handle for easy carrying. Press down to store it.

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

1. Press the [HELP] button to enter the help module.

2. Press any other key (e.g., [UTILITY], [MEASURE]) to display help information for that specific function.

3. Press the [HELP] button again to exit the help system.

You can manage the vertical system for each channel (CH1, CH2) using the front panel controls:

Enable/Disable a Channel: Press the [CH1] or [CH2] button to turn the corresponding channel on or off.

Adjust Vertical Scale (Volts/Div): Rotate the large knob for the selected channel to change the vertical scale. This will increase or decrease the waveform’s amplitude on the screen.

Adjust Vertical Offset (Position): Rotate the small knob for the selected channel to move the waveform up or down. Press the knob to reset the offset to zero.

Channel Coupling: Press the channel button (e.g., [CH1]) to open its menu. Select the coupling option:

• DC: Both DC and AC components of the signal pass through.

• AC: The DC component is blocked, and only the AC component passes through.

• Grounded: Both DC and AC components are blocked.

Bandwidth Limit: In the channel menu, you can select a bandwidth limit (e.g., 20MHz, 100M, etc.) to reduce high-frequency noise in the displayed waveform.

Input Impedance: In the channel menu, select the input impedance: 1M Ω (high impedance) or 50 Ω (for matching with 50 Ω sources).

Waveform Invert: In the channel menu, you can turn Invert on or off to flip the waveform vertically.

Fine Tuning: In the channel menu, switch between “Coarse” (standard 1-2-5 step adjustment) and “Fine” (small, continuous adjustment) for the vertical scale.

The probe ratio (attenuation) setting in the channel menu must match the attenuation ratio of the physical probe you are using to ensure correct amplitude measurements. The default ratio is 1X. You can set the ratio from 0.01X to 1000X.

Common probe ratio settings are:

Press the [HORIZ MENU] button to access the horizontal modes:

YT Mode: This is the standard oscilloscope mode where the Y-axis represents voltage and the X-axis represents time. When the time base is set to 100 ms/div or slower, the oscilloscope enters scanning (roll) mode.

XY Mode: In this mode, the X-axis represents the voltage of one channel (typically CH1) and the Y-axis represents the voltage of another channel (typically CH2). This is useful for creating Lissajous figures to measure the phase difference between two signals of the same frequency.

Roll Mode: This mode is used for viewing slow-moving signals. The waveform scrolls across the screen from right to left. The adjustable range for the horizontal gear in this mode is 100ms to 100s.

Press the [Acquire] button to access the acquisition modes:

Normal Mode: The oscilloscope samples the signal at equal time intervals to reconstruct the waveform. This mode provides the best display for most waveforms.

Average Mode: The oscilloscope averages multiple sampled 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 captures the maximum and minimum values of the signal within each sampling interval. This helps to display the envelope of the signal, detect narrow pulses, and avoid aliasing, though the displayed noise may be higher.

High Resolution Mode: This mode uses a supersampling technique to average adjacent points of a single sampled waveform, reducing random noise and producing a smoother display.

Proper trigger setup is crucial for a stable display. Press the [TRIG MENU] button to access the trigger settings:

1. Trigger Type: Select the type of event you want to trigger on. The HANTEK DSO2C35 offers many types, including Edge, Pulse, Video, Slope, UART, CAN, SPI, etc.

2. Trigger Source: Select the signal to use for the trigger. This can be CH1, CH2, External, or Line.

3. Trigger Mode:

• Auto: The oscilloscope acquires a waveform even without a valid trigger. If a trigger occurs, the display will be stable.

• Normal: The oscilloscope only acquires and updates the waveform when a valid trigger event is detected.

• Single: The oscilloscope waits for a single trigger event, captures one waveform, and then stops acquiring.

4. Trigger Level: Use the TRIGGER LEVEL knob to set the voltage level that the trigger source signal must cross to cause a trigger.

5. Holdoff: Set a waiting time after a trigger before the trigger circuit is re-armed. This is useful for stabilizing the display of complex or periodic waveforms that have more than one edge per period.

Press the [Math] button to access the mathematical operations menu. The supported operations are A+B, A-B, A*B, and A/B.

1. Operator: Press the [Math] button and select the desired algebraic operation (e.g., A+B for addition).

2. Source 1, Source 2: Select the source channels for the operation (e.g., CH1 for Source A, CH2 for Source B).

3. Offset: Use the multi-functional knob (V0) to adjust the vertical offset of the resulting math waveform.

4. Scale: Use the multi-functional knob (V0) to adjust the vertical scale of the resulting math waveform.

The FFT function converts the time-domain signal (voltage vs. time) into the frequency-domain (amplitude vs. frequency). Press the [Math] button and select FFT.

1. Operator: Select FFT.

2. Source: Select the channel (CH1 or CH2) to perform the FFT on.

3. Center: Set the center frequency of the display.

4. Span: Set the frequency span (width) of the display.

5. Ref Level: Set the vertical offset (reference level) of the display.

6. Scale: Set the vertical scale of the display.

7. Vertical Units: Select the vertical units, either dB or VRms.

8. Window: Select an FFT window function to reduce spectral leakage. Different window functions are suitable for different types of signals.

Press the [Measure] button to access the automatic measurement menu.

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

2. Type: Use the multi-functional knob V0 to select a specific measurement item from the list (e.g., Pk-Pk, Frequency, RMS, Rise Time, etc.). The result will be displayed on the screen.

You can also use the All Measure option to display all available measurement items simultaneously. The Clear All option will remove all measurements from the screen.

The Statistics function can be turned on to display the current, average, minimum, maximum, root mean square error, and count for each active measurement.

Cursors are used for manual measurements of time (X cursors) and voltage (Y cursors). Press the [Cursor] button to enter the menu.

Manual Mode:

1. Select Mode -> Manual.

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

3. Select AX and use the V0 knob to position the first vertical cursor (A).

4. Select BX and use the V0 knob to position the second vertical cursor (B).

5. Select AY and use the V0 knob to position the first horizontal cursor (A).

6. Select BY and use the V0 knob to position the second horizontal cursor (B).

A measurement window will display the values at each cursor (AX, AY, BX, BY) and the differences between them (BX-AX for time, BY-AY for voltage), as well as the reciprocal of the time difference (1/dX for frequency).

Track Mode:

In this mode, the cursors automatically “stick” to the waveform. As you adjust the horizontal position of a cursor, its vertical position will automatically track the voltage of the waveform at that point in time.

Follow these steps to upgrade the firmware. The process takes approximately 5 minutes.

1. Insert a USB storage device containing the upgrade package into the USB HOST interface on the front panel.

2. Press the [Utility] button to enter the auxiliary menu.

3. Press the Upgrade -> Upgrade Firmware soft key.

4. Rotate the V0 knob to select the upgrade file and press V0 to confirm.

5. Press the Start Upgrade soft key to begin the firmware upgrade.

After the upgrade is complete, the oscilloscope will restart. It is recommended to perform a self-calibration after upgrading.

The Pass/Fail function monitors a signal and checks if it falls within a defined mask.

1. Press [Utility] -> Pass/Fail to enter the function menu.

2. Enable or Disable: Select the first option to turn the Pass/Fail test On or Off.

3. Select Source: Choose the channel (CH1 or CH2) to test.

4. Create Rules (Regular):

• Select Regular -> Vertical and use the V0 knob to set the vertical tolerance.

• Select Regular -> Horizontal and use the V0 knob to set the horizontal tolerance.

• Select Create to generate the rule template (mask) based on the current waveform and tolerances.

5. Configure Output (Mode): Select the action to take on a Pass or Fail event (e.g., Pass Ring, Fail Ring).

6. Run Test: Select Run to start the test. Select Stop to end it.

Self-calibration optimizes the signal path for maximum measurement accuracy. It should be run if the ambient temperature changes by more than 5°C or more. For best results, allow the oscilloscope to warm up for 20 minutes before calibrating.

1. Disconnect any probes or cables from the front panel input connectors.

2. Press the [Utility] button.

3. Select the Calibrate option and press the soft key.

4. A dialog box will pop up. Follow the on-screen prompts to perform the self-calibration.

You can save and recall settings, waveforms, images, and other data to either internal memory or an external USB drive. Press the [SAVE/RECALL] button to begin.

To Save:

1. Select the Type of data to save (e.g., SetUp, Waveform, Image, CSV).

2. Select the Save To location (Internal or External for a USB drive).

3. If saving internally, select a memory Location (1-9).

4. Select Save to complete the action.

To Recall:

1. Select the Type of data to recall (e.g., SetUp, Waveform).

2. Select the Recall From location (Internal or External).

3. Select the Location of the file you wish to load.

4. Select Recall to load the data.

Shortcut: Press the [SAVE TO USB] shortcut key on the front panel to instantly save a screenshot to a connected USB drive.

Press the [WAVE GEN] button to access the signal generator settings.

1. Waveform: Select the basic wave to output: Sine, Square, Ramp, Exp, Noise, DC, or a custom Arbitrary wave (Arb1-Arb4).

2. Frequency: Set the frequency of the waveform.

3. Amplitude: Set the peak-to-peak amplitude of the waveform.

4. Offset: Set the DC offset voltage.

5. Symmetry/Duty: Set the duty cycle for a square wave or the symmetry for a triangular/ramp wave.

6. Impedance: Select the output impedance (High Z or 50 Ω).

The generator also supports Modulation (AM/FM) and Burst output, which have their own sub-menus accessible from the main AWG screen or via the [BURST] button.

You can remotely control the oscilloscope via its USB DEVICE port on the rear panel.

1. Connect the device: Use a USB data cable to connect the oscilloscope’s USB DEVICE port to a USB HOST port on your PC.

2. Install USB driver: After connecting for the first time, the PC should automatically install the necessary driver.

3. Use IO software: Use compatible IO software on your PC (such as Keysight IO) to establish communication.

4. Search for resources: The IO software will search for and identify the connected oscilloscope.

5. Control the instrument: Once connected, you can use the software’s interactive panel to send SCPI (Standard Commands for Programmable Instruments) commands to control the oscilloscope and read data back.

If the oscilloscope does not power on after pressing the power switch, follow these steps:

1. Check that the power cord is securely connected to the side of the oscilloscope.

2. Ensure the power switch has been pressed.

3. After confirming the above, try restarting the instrument.

4. If the oscilloscope still does not turn on, contact your local dealer or Hantek technical support.

If you see a distorted waveform, check the following:

1. Ensure the oscilloscope probe is properly and securely connected to the BNC input channel.

2. Check that the probe is correctly connected to the circuit you are measuring.

3. Verify that the probe is properly compensated. If not, perform the probe compensation procedure as described in the manual.

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

1. Check that the probe is securely connected to the BNC connector of the signal input channel.

2. Make sure the channel you are using is turned on (press the corresponding CH1/CH2 button).

3. Confirm that there is a signal being output from the circuit you are testing.

4. If it is a DC signal with a large amplitude, you may need to increase the vertical scale (V/div) range.

5. Press the [AUTO SET] button to let the oscilloscope automatically detect and display the signal.

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

If the oscilloscope fails to recognize your USB flash drive, check the following:

1. Ensure the USB flash drive is functioning properly by testing it in another device.

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

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

4. Turn the oscilloscope off and on again, then re-insert the USB drive.

5. If the issue persists, contact Hantek technical support.

If you cannot get a stable trigger, check these settings:

1. Ensure the trigger source (e.g., CH1) matches the channel where your signal is connected.

2. Check if the trigger level is adjusted correctly. It must be set within the vertical range of the signal. You can press the trigger level knob to automatically set the level to the signal’s center point.

3. Check if the trigger method is correct. The default is Edge triggering. For different input signals, a different trigger type (e.g., Pulse, Video) may be required.

Pressing the [Default Setup] button restores the oscilloscope to these settings: