HANTEK DSO2D35 (01) PDF Document

To ensure safety and prevent damage when using the HANTEK DSO2D35, please follow these precautions:

Only professionally authorized personnel can perform repairs.

Use the right power cable: Use only the power cable approved for the country of use.

Connect and disconnect correctly: First, connect the probe to the oscilloscope. Then, connect the probe to the circuit being measured. When disconnecting, first disconnect the probe from the circuit under test, then from the oscilloscope.

Ground the product: The product is grounded through the power cable’s grounding conductor to avoid electric shocks. This connection must be established before connecting any input or output terminals.

Connect the probe properly: The probe’s ground wire is at ground potential. 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 before connecting.

Do not operate with the cover open: Do not run the product with its 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 qualified maintenance personnel check it.

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.

Ventilation: The HANTEK DSO2D35 uses a fan for cooling. Ensure air intake and exhaust areas are unobstructed. Provide at least 10 cm of clearance beside, above, and behind the instrument for adequate ventilation.

Working Environment:

Temperature:

Operating: 0°C to 50°C

Non-operating: -30°C to 70°C

Humidity:

Operating:

Below +30°C: ≤95%RH (without condensation)

+30°C to +40°C: ≤75%RH (without condensation)

+40°C to +50°C: ≤45%RH (without condensation)

Non-operating:

Below 65°C: ≤95% RH (without condensation)

Altitude:

Operating: below 3 km

Non-operating: below 15 km

Installation (Overvoltage) Category: This product is powered by mains conforming to installation (overvoltage) category II.

Pollution Degree: Pollution Degree 2. This means normally only nonconductive pollution occurs, but temporary conductivity caused by condensation is to be expected (e.g., indoor environment).

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

Cleaning:

1. Use a lint-free cloth to remove dust from the outside of the oscilloscope and probe. Be careful not to scratch the display filter.

2. Clean the oscilloscope with a soft cloth soaked in water. For a more thorough cleaning, you can 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 reagents. Ensure the device is completely dry before powering it on again to avoid electrical short circuits.

The HANTEK DSO2D35 offers a range of comprehensive functions and performance features:

Supports 1MΩ/50Ω impedance switching for signal integrity.

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

Built-in arbitrary waveform generator, outputting 5 standard waveforms and supporting custom arbitrary and burst outputs.

Protocol Trigger and Decoding for UART, LIN, CAN, SPI, and IIC to analyze serial bus data.

32 automatic measurement and threshold measurement functions with statistical analysis.

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

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

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

Support for 14 operating languages.

Two cursor measurement modes: manual and tracking.

Vertical measurement range from 500uV to 10V.

FFT scale display for convenient reading of results.

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

XY mode with dual window display for observing waveform phase changes.

Upon receiving your HANTEK DSO2D35, perform the following steps:

1. General Examination:

Check the shipping package for any damage. If damaged, keep the packaging for inspection.

Check the accessories against the list in the user manual. Contact the dealer if anything is missing or damaged.

Check the machine for physical damage or performance issues.

2. Preparation Before Use:

Adjust the supporting legs at the bottom to tilt the oscilloscope for better viewing.

Connect the oscilloscope to an AC power source using the provided power cord.

3. Turn-on Checkout:

Press the power button. The oscilloscope will perform a series of self-checks. After completion, the startup screen will appear.

4. Function Inspection:

Press the [Default Setup] button to restore factory settings.

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

Connect the probe to the CH1 input terminal and the compensation signal output terminal.

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

Observe the screen to ensure a normal square wave signal is displayed.

Repeat for the CH2 channel.

5. Probe Compensation:

If the square wave is not perfectly compensated (i.e., not a flat-topped square wave), use a non-metallic screwdriver to adjust the variable capacitance on the probe until the waveform is perfectly square.

Front Panel Description

Rear Panel Description

The vertical system controls each channel (CH1, CH2) independently. Here’s how to use the functions:

Enable/Disable a Channel: Press the [CH1] or [CH2] button to toggle the channel on or off. The button light indicates when the channel is on.

Adjust Vertical Scale (Volts/Div): Rotate the vertical gear knob for the selected channel to change the volts per division. Clockwise decreases the V/div (zooms in), and counter-clockwise increases it (zooms out). Pressing the knob toggles between “coarse” and “fine” adjustment.

Adjust Vertical Offset: Rotate the vertical offset knob for the selected channel to move the waveform up or down. Pressing the knob resets the offset to zero.

Set Channel Coupling: In the channel menu, select Coupling and choose from:

DC: Allows both DC and AC components of the signal to pass.

AC: Blocks the DC component of the signal.

Ground: Disconnects the input signal, showing a zero-volt reference level.

Set Bandwidth Limit: In the channel menu, select the BW menu to limit the bandwidth (e.g., 20M, 100M, etc.) to reduce noise on the displayed waveform.

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

Set Probe Ratio: In the channel menu, select Attenuation and set the value to match the attenuation ratio of your probe (e.g., 1X, 10X, 100X). This ensures accurate voltage readings. The following table shows the ratios:

Invert Waveform: In the channel menu, select the inverting menu to turn waveform inversion on or off. When on, the waveform’s voltage values are inverted.

The horizontal system controls the time axis of the waveforms.

Adjust Horizontal Position: Rotate the horizontal displacement knob to move the waveform left or right relative to the trigger point at the center of the screen. Pressing the knob resets the horizontal displacement to zero.

Adjust Horizontal Time Base (Sec/Div): Rotate the horizontal time base knob to change the time per division. Clockwise rotation decreases the time base (zooms in), and counter-clockwise increases it (zooms out). This expands or compresses the waveform horizontally.

Delayed Sweep: Press the zoom button in the horizontal control area to enable delayed sweep. The screen will split into two areas: the top shows the original waveform, and the bottom shows a magnified section of it. You can adjust the magnified area using the horizontal position and time base knobs.

Horizontal Mode: Press the [HORIZ MENU] button to select the horizontal mode:

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

XY Mode: This mode displays one channel’s voltage on the X-axis and another on the Y-axis. It is useful for measuring phase differences between two signals (Lissajous patterns).

Roll Mode: Available for slow time base settings (100ms/div or slower). In this mode, the waveform scrolls across the screen from right to left.

Press the [Acquire] button to access the sampling settings menu.

Acquire Type:

Real-time sampling: Uses real-time digital technology to collect waveforms.

Equivalent sampling: Reconstructs waveforms using equivalent sampling techniques.

Acquire Mode:

Normal Mode: The oscilloscope samples the signal at equal time intervals. This provides 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 captures the maximum and minimum values within each sampling interval. This is useful for capturing narrow pulses and avoiding aliasing, though it may display more noise.

High Resolution Mode: This mode averages adjacent points of a single sampled waveform to reduce random noise and produce a smoother display. It is used when the sampling rate is higher than the storage rate of the acquisition memory.

Memory Depth:

Storage depth is 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. You can select the memory depth (e.g., 4K, 40K, 80K) in the Acquire menu. The available options change depending on whether single or multiple channels are active.

Press the [TRIG MENU] button to access the trigger settings. A correct trigger setup is essential for a stable waveform display.

Trigger Level: Rotate the trigger level knob to set the voltage level the signal must cross to initiate a trigger. Pressing the knob sets the level to 50% of the waveform’s peak-to-peak amplitude.

Trigger Source: In the trigger menu, select the source:

CH1-CH2: Uses the signal from the selected analog channel.

External: Uses a signal from the [EXT TRIG] terminal (0-3.3V CMOS waveform).

Line: Triggers on the AC power line signal.

Trigger Mode:

Auto: The oscilloscope acquires a waveform even if a trigger event does not occur. It displays a stable waveform when a valid trigger is found.

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

Single: The oscilloscope acquires one waveform upon a valid trigger and then stops.

Force Trigger: Pressing the [FORCE TRIG] button manually forces a trigger event.

Holdoff: In the trigger menu, you can set a holdoff time. This is the period the oscilloscope waits after a trigger before it will accept another one, useful for stabilizing complex, repeating waveforms.

In the [TRIG MENU], select the Type menu to choose a trigger type:

Edge: Triggers on a rising, falling, or either edge of the signal as it crosses the trigger level.

Pulse Width: Triggers on a positive or negative pulse with a width that is greater than, less than, equal to, or not equal to a specified time.

Video: Triggers on standard analog video signals (NTSC, PAL). You can trigger on specific lines, fields (odd, even, all), or scan lines.

Slope: Triggers when the signal’s rise or fall time between two voltage levels is greater than, less than, equal to, or not equal to a specified time.

Overtime: Triggers if the time between a rising and subsequent falling edge (or vice-versa) is greater than a set timeout period.

Window: Triggers when the input signal passes through a “window” defined by high and low trigger levels.

Pattern: Triggers on a logical AND/OR combination of channel states (High, Low, Don’t Care). One channel can be set as a rising or falling edge qualifier.

Interval: Triggers when the time interval between two consecutive rising (or falling) edges satisfies a set time condition (<, >, !=, =).

Under Amp (Runt): Triggers on a pulse that crosses one trigger level but fails to cross a second one. Useful for finding runt pulses.

UART, LIN, CAN, SPI, I2C: These are serial protocol triggers that trigger on specific bus events like start bit, address, data, or error conditions.

Press the [Math] button to access the mathematical operation menu. The HANTEK DSO2D35 supports algebraic operations and Fast Fourier Transform (FFT).

Arithmetic Operations:

1. Select Operator: Choose A+B (Addition), A-B (Subtraction), A*B (Multiplication), or A/B (Division).

2. Select Source 1 and Source 2: Choose the input channels (CH1, CH2) for the operation.

3. Adjust Offset and Scale: Use the V0 knob to adjust the vertical offset and scale of the resulting math waveform.

FFT Operation:

FFT converts a time-domain signal into its frequency-domain components.

1. Select Operator: Choose FFT.

2. Select Source: Choose the channel to analyze (CH1, CH2).

3. Adjust Center and Span: Set the center frequency and frequency span (width) of the FFT display.

4. Set Vertical Units: Choose dB or VRms for the vertical axis.

5. Select Window Function: Choose a windowing function to reduce spectral leakage. The options and their uses are in the table below.

Press the [Measure] button to enter the measurement menu.

To measure specific parameters:

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

2. Select Type: Use the V0 knob to scroll through and select one of the 32 available automatic measurements (e.g., PkPk, Frequency, RMS, Rise Time, etc.). The selected measurement will appear on the screen.

To display all measurements:

In the [Measure] menu, select All Measure. All available measurement items for the selected source will be displayed on the screen simultaneously.

To use statistics:

In the [Measure] menu, select Statistics and turn it on. This will display the current, average, minimum, maximum, and count for all active measurements.

Quick Measurement after AUTO:

After pressing the [Auto Scale] button, a menu appears for quick measurements:

Single cycle: Automatically sets the screen to display a single cycle and measures its time and voltage parameters.

Multi cycle: Sets the screen to display multiple cycles and performs measurements.

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

1. Select Cursor Mode: In the cursor menu, select Mode and choose either Manual or Track.

Manual Mode: You manually position the cursors anywhere on the screen.

Track Mode: The cursors “stick” to the waveform of the selected source. As you move a cursor horizontally, its vertical position automatically adjusts to stay on the waveform trace.

2. Select Source: Choose the channel (CH1, CH2, or Math) you want to measure.

3. Adjust Cursors:

Select AX or BX to control the horizontal (vertical line) cursors A or B. Rotate the V0 knob to move the selected cursor.

Select AY or BY to control the vertical (horizontal line) cursors A or B. Rotate the V0 knob to move the selected cursor.

Select AXBX or AYBY to move both cursors simultaneously.

4. Read the Results: A measurement window will appear on the screen showing the values at each cursor (AX, AY, BX, BY) and the difference between them (BX-AX for time, BY-AY for voltage), as well as the reciprocal of the time difference (1/dX for frequency).

Press the [Utility] button to enter the system configuration menu.

Language: Select to switch between 14 available languages.

Sound: Turn the operational beep sound on or off.

Update: Upgrade the oscilloscope’s firmware via a USB storage device.

Pass/Fail: Access the pass/fail test function, which compares a live signal to a predefined template and provides a pass or fail indication.

System Info: View the oscilloscope’s software version, hardware version, and serial number.

Calibrate: Run the self-calibration program to optimize the signal path for maximum measurement accuracy. It is recommended to run this if the ambient temperature changes by more than 5°C. Disconnect all probes and preheat the instrument for 20 minutes before calibrating.

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

Press the [Decode] button to enter the decoding settings menu. This function overlays decoded bus data on top of the waveform.

The general procedure for all supported protocols (UART, LIN, CAN, SPI, IIC) is as follows:

1. Select Bus Type: In the decode menu, press the Type menu button and select the protocol you want to decode.

2. Select Source(s): Assign the appropriate oscilloscope channels (CH1, CH2) to the bus signal lines. For example, for I2C, you would assign one channel to SCL (clock) and another to SDA (data).

3. Set Bus Parameters: Configure the specific parameters for the chosen protocol. This includes settings like:

Baud Rate: For UART, LIN, CAN.

Idle Level: The logic level of the bus when inactive.

Data Bits, Parity, etc.: For UART.

Clock Edge: For SPI, specifies whether data is sampled on the rising or falling edge of the clock.

4. Adjust Label Position: Use the Label Position menu and the V0 knob to set the vertical position of the decoded text on the display.

Once configured, the oscilloscope will display the decoded data (e.g., in hexadecimal) below the corresponding waveform segments.

Press the [SAVE/RECALL] button to access the save/recall menu.

To Save:

1. Select Type: Choose what you want to save (SetUp, Waveform, Reference, CSV, Image).

2. Select Save Directory: Choose the destination: Internal memory or an external USB storage device.

3. Select Location/Name: For internal memory, select a location (No. 1 to No. 9). For external USB, you can use the File Management options to create new files or folders.

4. Press Save: Press the Save menu button to complete the save operation.

To Recall:

1. Select Type: Choose the type of file you want to recall (SetUp, Waveform, Reference).

2. Select Recall From: Choose the source: Internal or External.

3. Select Location: Choose the file location to load.

4. Press Recall: Press the Recall menu button to load the file. Recalling a SetUp will configure the oscilloscope, while recalling a Waveform or Reference will display it on the screen.

File Management (for external USB):

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

New File: Create a new file or folder.

Delete File: Delete a selected file or folder.

Rename File: Rename a selected file or folder.

Auto Scale:

Pressing the [AUTO SET] button causes the oscilloscope to automatically adjust the vertical, horizontal, and trigger controls to produce a usable display of the input signal. This is a quick way to get a stable waveform on the screen without manual adjustments. The settings applied by Auto Scale are shown in the table below.

Default Setup:

Pressing the [DEFAULT SETUP] button resets the oscilloscope to its factory default settings. This is useful for returning to a known starting configuration.

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

1. Select Output Waveform Type:

In the Wave menu, select the basic waveform: Sine, Square, Ramp, Exp, Noise, DC, or one of the Arbitrary waveforms (Arb1-Arb4).

2. Set Waveform Parameters:

Frequency: Set the frequency of the waveform. Not applicable for DC and Noise.

Amplitude: Set the peak-to-peak voltage of the waveform.

Offset: Set the DC offset voltage.

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

Impedance: Select the output impedance as high impedance or 50 Ω.

3. Use Modulation:

In the [WAVE GEN] menu, select the Type menu to enable modulation (AM, FM). You can then set the modulation waveform, frequency, and depth/deviation.

4. Use Burst:

Press the [Burst] button to configure burst output.

Type of burst: Choose N cycle (a specific number of cycles per trigger) or Infinite (continuous output after trigger).

Counting: If N cycle is selected, set the number of cycles for the burst.

Trigger: Press the trigger button in the menu to manually trigger the burst output.

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.

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, please follow the relevant instructions in the manual for probe compensation.

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 if the CH1 or CH2 menu button light is on).

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

4. If it is a DC signal with a relatively large amplitude, try increasing the vertical scale (volts/div).

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

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

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.

1. Check if the triggering data source in the trigger menu is set to the same channel as the signal input channel.

2. Check if the trigger level is adjusted correctly. The trigger level might be set too high or too low for the signal. You can press the trigger level knob to automatically set the level to the signal’s center point.

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 pulse, video, etc.