HANTEK HRDO4204D (01) PDF Document

To avoid injury and prevent damage to your HANTEK HRDO4204D, 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 of use.

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

Grounding: The product is grounded through the power cable’s grounding conductor. This must be connected to earth ground before connecting any input or output terminals to avoid electric shock.

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

Terminal Ratings: Check all rating values and signs on the product to avoid fire or excessive current. Consult the product manual for details before connecting.

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

Circuit Exposure: Do not touch exposed connectors and components after the power is switched on.

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

Ventilation: Maintain proper ventilation around the unit.

Environment: Do not operate in a humid, inflammable, or explosive environment. 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:

Inspect and clean the outer surface of the instrument frequently by following these steps:

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. For a more thorough cleaning, use a soft cloth soaked in water or 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.

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

After receiving your oscilloscope, please perform the following checks:

Check the shipping package:

Inspect the packaging for any damage caused during transportation. If the packaging cartons or protective foam are seriously damaged, keep them until the entire machine and its accessories have passed electrical and mechanical testing.

Check the accessories:

Verify that all accessories are present as listed in Appendix A of the user manual. If any accessory is missing or damaged, contact the dealer.

Check the machine:

If you find that the instrument is damaged, not working properly, or fails its performance test, contact the dealer responsible for the business.

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 oscilloscope supports an AC power supply of 47-440Hz, 90-264VAC / 127-320VDC, 80Watts MAX. Use the provided power cord to connect the oscilloscope to a power supply. Ensure the instrument is correctly grounded to avoid electric shock.

3. Turn-on Checkout:

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 completion.

4. Function Inspection:

p>Step 1. Click on [Default Setup] to restore the oscilloscope to its factory settings.

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

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

Step 4. Set the probe attenuation ratio to X10 and click [Auto Scale].

Step 5. Observe the waveform to see if a normal square wave signal is displayed.

Step 6. Check channels CH2-CH4 using the same method. If the waveform is not a perfect square wave, proceed to Probe Compensation.

5. Probe Compensation:

When connecting a probe to an input channel for the first time, you must match the probe to the channel.

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

Step 2. Compare the displayed waveform to the reference images for “Perfectly compensated,” “Over compensated,” and “Under compensated.”

Step 3. Use a non-metallic screwdriver to adjust the variable capacitance on the probe until the waveform on the screen appears “Perfectly compensated.” Repeat if necessary.

The horizontal control system includes the following keys and knobs:

Search: Press this key to enter the search settings menu, which allows you to find events in the collected data by setting search criteria.

Zoom: Press this key to turn the delayed scanning (zoom) function on or off.

Horizontal time base knob: Rotate this knob to modify the horizontal time base (time per division). Turn it clockwise to decrease the time base (zoom in) and counterclockwise to increase it (zoom out). Press the knob to switch between “Coarse” and “Fine” adjustment modes.

Horizontal position knob: Rotate this knob to modify the horizontal position of the waveform (trigger position). Press the knob to quickly reset the horizontal position to zero.

Navigation Control Key: This combination key is used for recording and playback navigation, time navigation, and event navigation.

The vertical control system consists of the following:

CH1, CH2, CH3, and CH4 analog input channel switches: Press these buttons to turn the respective channels on or off. The color of the button corresponds to the color of the waveform on the screen.

Channel vertical offset knob: Rotate this knob to adjust the vertical offset (position) of the current channel’s waveform. Clockwise increases the offset, and counterclockwise decreases it. Press the knob to reset the vertical offset to zero.

Channel vertical gear knob: Rotate this knob to change the vertical scale (volts per division) of the current channel. Clockwise decreases the V/div setting, and counterclockwise increases it. Press the knob to switch between “coarse” and “fine” adjustment modes.

The main function menu keys provide access to various settings and features:

Quick Action: Performs quick operations like screenshots, saving waveforms, saving settings, all measurements, and statistical resetting.

Analyze: Enters the analysis menu for functions like Frequency Counter, DVM, Power Analysis, Histogram, and Bode Plot.

Cursors: Enters the cursor measurement menu, providing manual and tracking cursor modes.

Save/Recall: Performs save and recall functions for settings, waveforms, and other data.

Utility: Enters the system function settings menu for configuring interfaces, sound, language, Pass/Fail testing, recording, and self-calibration.

Help: Provides on-screen instructions for various function buttons and menu keys.

Meas: Enters the automatic measurement settings menu.

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

Display: Enters the display settings menu to adjust display type, persistence time, and waveform brightness.

The rear panel of the HANTEK HRDO4204D includes the following interfaces:

Handle: Can be pulled up for easy carrying of the oscilloscope.

LAN interface: Used to connect the oscilloscope to a network.

USB VIEW interface: Used to connect the oscilloscope to a computer for remote control via SCPI commands.

Reference clock: Provides a more accurate sampling clock signal or can be used to synchronize multiple oscilloscopes.

Aux output terminal: Can output a Trigger signal reflecting the current capture rate or a Pass/Fail test pulse.

EXT input: Used to input an external trigger signal.

G1, G2 signal source output terminal: Outputs the waveform set by the built-in signal generator.

HDMI interface (option): Connects to an external display like a monitor or projector.

RS-232/485 interface (option): Serial communication interface.

Power socket: Power input terminal for the AC power cord.

The HANTEK HRDO4204D features a multi-touch capacitive screen with the following gesture controls:

1. Tap:

Tap a menu or function on the screen with one finger to operate menus, use the pop-up numeric keypad, set file names with the virtual keyboard, or close pop-up windows.

2. Drag:

After touching and holding a target, drag it to the desired position. This can be used to change a waveform’s vertical offset or move a window on the screen.

3. Pinch & Stretch:

Bring two fingers together (pinch) or move them apart (stretch) on the screen to zoom in or out on the waveform. Vertical pinching adjusts the vertical scale (V/div), and horizontal pinching adjusts the horizontal scale (s/div).

4. Rectangle Drawing:

Click the [Hantek] icon and then click AreaSel to enter rectangular drawing mode. Drag your finger on the screen to draw a rectangle. A menu will appear allowing you to select functions like “Histogram,” “Enlarge Level” (horizontal zoom), “Enlarge Vertical” (vertical zoom), or “Enlarge Waveform” (zoom in both directions) for the selected area.

You can set parameters on the HANTEK HRDO4204D using two methods:

1. Multifunction Knob (V0):

For parameters on a menu, you can rotate the multifunction knob V0 (located in the button area) to select different parameter items or modify their values.

2. Numeric Keypad:

After clicking on a parameter in a menu, a numeric keypad will pop up on the screen. You can use the touch screen to enter specific values and select units. The keypad also has options to set parameters to maximum, minimum, or default values, and to clear the input box.

To Enable an Analog Channel:

You can enable a channel (e.g., CH1) using one of the following methods:

Method 1: Click on the channel status label at the bottom of the screen. The label and the corresponding [CH1] button will light up.

Method 2: Press the physical [CH1] button directly on the front panel. The light on the button and the corresponding channel knob will turn on.

To Disable an Analog Channel:

You can disable a channel (e.g., CH1) using one of the following methods:

Method 1: If the CH1 channel is already open and selected, press the [CH1] button once to close it.

Method 2: If the CH1 channel is open but not currently selected, press the [CH1] button once to select it, and then press it again to close it.

Method 3: Use the touch screen to click on the channel number on the channel menu at the bottom of the screen to close it.

Press the button for the desired channel (e.g., [CH1]) to open its settings menu. You can configure the following parameters:

Vertical Scale (V/div): Adjust by rotating the vertical gear knob for that channel or by tapping the scale value on screen.

Vertical Offset: Adjust by rotating the vertical offset knob for that channel or by dragging the waveform up/down on the touch screen.

Channel Coupling: Set how the signal is coupled to the acquisition system. Options are DC (passes both AC and DC components), AC (blocks DC component), and GND (disconnects the input signal).

Bandwidth Limit: Reduces high-frequency noise. You can enable a 20MHz limit or other available limits to filter the signal.

Probe Ratio (Attenuation): Set this to match the attenuation factor of your probe (e.g., 1X, 10X) to ensure correct voltage readings.

Input Impedance: Select either 1MΩ (standard high impedance) or 50Ω (for matching with 50Ω sources).

Waveform Invert: Inverts the waveform vertically around the zero-volt level.

Amplitude Unit: Change the vertical unit to V (Volts), A (Amps), W (Watts), or U (Unknown).

Fine Tuning: Switch between coarse (standard 1-2-5 steps) and fine adjustment for the vertical scale, allowing for more precise amplitude adjustments.

Channel Delay: Set a delay time from -100ns to 100ns to correct for probe cable skew and zero offset errors.

Press the [Acquire] button to open the acquisition menu. You can select one of the following modes:

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

Average: The oscilloscope averages multiple sampled waveforms to reduce random noise and improve vertical resolution. You can set the number of averages (from 2 to 1024). This mode is useful for viewing noisy signals, but the display will respond more slowly to changes.

Peak Detect: The oscilloscope captures the maximum and minimum values of the signal within each sampling interval. This mode is useful for finding glitches, avoiding aliasing on fast signals, and viewing the envelope of a signal.

High Resolution: This mode uses a supersampling technique to average adjacent points of a single sampled waveform. It reduces random noise and produces a smoother waveform on the screen. It is typically used when the sampling rate is higher than the storage rate of the acquisition memory.

An edge trigger is the most common trigger type and is used to stabilize the waveform on a specific rising or falling edge.

Step 1. Press the [Trig Menu] button on the front panel.

Step 2. In the menu, select Type and ensure it is set to “Edge”.

Step 3. Select Source and choose the channel you want to trigger on (e.g., CH1, CH2, EXT).

Step 4. Select Slope Type and choose the edge to trigger on: “Rising”, “Falling”, or “Either”.

Step 5. Adjust the Trigger Level by rotating the “Trigger” knob. A horizontal line will appear on the screen indicating the voltage level. Position this line so it intersects with the part of the waveform you want to trigger on.

Step 6. If needed, adjust the Holdoff to stabilize complex waveforms like pulse trains. You can set a time during which the trigger will be ignored after a valid trigger event.

The HANTEK HRDO4204D can perform various math operations on channel waveforms. Press the [Math] button to open the Math Operation menu.

Arithmetic Operations:

Select the Operator as A+B (Addition), A-B (Subtraction), A*B (Multiplication), or A/B (Division). Then, select Source A and Source B from the available channels (CH1-CH4, Ref).

FFT (Fast Fourier Transform):

Select FFT as the operator to view the frequency domain of a signal. You can then configure:

p>- Source: The channel to perform the FFT on.

– X frequency range: Set the center/span or start/end frequency.

– Unit: dBm/dBV or Vrms.

– Window: Select a windowing function (Rectangular, Hanning, Hamming, etc.) to reduce spectral leakage.

– Peak Search: Automatically find and label peaks in the spectrum.

Logic Operation:

Perform logical operations such as A&&B (AND), A||B (OR), A^B (XOR), and !A (NOT) on channel waveforms. You must set the high/low voltage thresholds for each channel involved.

Function Operation:

Apply functions to a single source waveform, including Intg (Integrate), Diff (Differentiate), Sqrt (Square Root), Lg (Log base 10), Ln (Natural Log), Exp (Exponent), Abs (Absolute Value), and AX+B (Linear Function).

The oscilloscope can automatically measure various waveform parameters. Press the [Meas] button to enter the measurement menu.

Add a Measurement:

Step 1. From the [Meas] menu, select Add.

Step 2. Choose a Category: Horizontal (time-related), Vertical (voltage-related), or Other (delay, phase, area).

Step 3. Select a Source channel for the measurement.

Step 4. Tap the specific measurement you want to add from the on-screen list (e.g., Freq, Period, VMax, Vpp).

The measurement results will be displayed at the bottom of the screen.

All Measure:

To display all available parameters for a specific channel at once, press [Meas] -> All Measure and select the desired channel. A table with all measurement results for that channel will appear.

Statistics:

You can enable statistics to view the current, average, maximum, minimum, and standard deviation for any active measurement. In the measurement menu, go to Statistic to turn this feature on.

Remove Measurements:

In the measurement menu, go to Remove. You can choose to remove the last added measurement or select Remove All to clear all active measurements from the display.

Cursors are markers that you can move to measure time (X-axis) or voltage (Y-axis) values on a waveform. Press the [Cursors] button to enter the cursor settings menu.

Manual Mode:

Step 1. In the Cursors menu, set Mode to “Manual”.

Step 2. Select the Source channel you wish to measure.

Step 3. For Select, choose the cursor type: “X” for vertical cursors (time/frequency) or “Y” for horizontal cursors (voltage).

Step 4. Use the menu options AX, BX (for X cursors) or AY, BY (for Y cursors) to select a cursor. Rotate the multifunction knob V0 to move the selected cursor to the desired point on the waveform.

Step 5. The measurement results (e.g., AX, BX, ΔX for time; AY, BY, ΔY for voltage) will be displayed in the cursor measurement window on the screen.

Track Mode:

In Track Mode, the cursors automatically “stick” to the waveform of the selected source. When you adjust the horizontal position of a cursor, its vertical position will automatically update to the waveform’s voltage at that point.

You can save data to the instrument’s internal memory or to an external USB flash drive. Press the [Save/Recall] button to open the menu.

To Save Data:

Step 1. Select a storage type from the menu: Save Image, Save Wave, or Save Setup.

Step 2. In the corresponding sub-menu, configure the save options:

p>- For images: Set the Format (*.png, *.bmp, etc.), File Name, and other options.

– For waveforms: Set the Data Source (Screen or Memory), Format (*.bin, *.csv), File Name, etc.

– For setups: Set the File Name. The format is *.stp.

Step 3. Navigate to the desired directory (internal “Local Disk (C)” or external “Removable USB Disk(D)”) using the Disk Management interface.

Step 4. Click the Save button.

To Recall (Load) Data:

Step 1. In the [Save/Recall] menu, select Load Wave or Load Setup.

Step 2. Navigate to the location of the saved file using the Disk Management interface.

Step 3. Select the file you wish to load.

Step 4. Click the Load button to recall the waveform or instrument settings.

The HANTEK HRDO4204D includes an optional built-in waveform generator. Press the [G1] or [G2] button in the “Wave Gen” section to enter the generator settings for the respective channel.

Outputting a Basic Waveform (e.g., Sine Wave):

Step 1. Press [G1] to open the generator menu.

Step 2. In the Wave menu, select the desired waveform type (e.g., Sine, Square, Ramp, Pulse, Noise, DC).

Step 3. Set the waveform parameters:

p>- Frequency: Set the frequency of the wave.

– Amplitude: Set the peak-to-peak voltage.

– Offset: Set the DC offset voltage.

– Start Phase: Set the starting phase of the waveform.

Step 4. For specific waveforms, you can set additional parameters like Duty Cycle (for Square), Symmetry (for Ramp), or Pulse Width (for Pulse).

Step 5. Configure the Impedance to match your load (HighZ or 50Ω).

The waveform will be output from the corresponding G1 or G2 BNC connector on the rear panel.

To Output an Arbitrary Waveform:

In the Wave menu, select “Arb”. You can then choose to load a waveform from an existing channel, load a stored waveform file (*.arb), or create a new waveform using the built-in editor.

The oscilloscope can decode several common serial protocols. The general steps are similar for each protocol.

Example: UART Decoding

Step 1. Press the [Decode] button to open the decoding menu.

Step 2. Set the Bus Type to “UART”.

Step 3. In the Source menu, assign the oscilloscope channels to the protocol lines (e.g., set Tx and/or Rx) and define the voltage threshold for a logic high/low.

Step 4. In the Setting menu, configure the protocol parameters to match your bus:

p>- Baud: Set the baud rate (e.g., 9600, 115200).

– Data Bits: Set the number of data bits (e.g., 8).

– Parity: Set the parity (None, Odd, Even).

– Stop Bit: Set the number of stop bits (e.g., 1).

– Endian: Set the bit order (LSB or MSB first).

Step 5. In the Display menu, choose how the decoded data is displayed. You can set the format (Hex, ASCII, etc.) and turn on the Event Table for a tabular view of all decoded packets.

Step 6. Go back to the main decode menu and turn the Bus Status to “On”.

The decoded data will be overlaid on the waveform, and the event table will show a detailed log of the bus traffic.

The [Auto Scale] button automatically adjusts the oscilloscope’s vertical, horizontal, and trigger controls to produce a stable, usable display of the input signal. When pressed, the oscilloscope analyzes the input signal and sets the following parameters to optimal values:

Acquisition Mode: Normal

Display: Vector

Vertical (VOLTS/DIV): Adjusted to fit the signal on screen.

Horizontal (SEC/DIV): Adjusted to show several cycles of the signal.

Trigger Source: Set to the channel with the signal.

Trigger Mode: Auto

Trigger Level: Set to 50% of the signal’s amplitude.

Trigger Type: Edge

Coupling: DC

This function is very useful when you first connect to an unknown signal and want a quick, stable display.

Pressing the [Default Setup] button restores the oscilloscope to its factory default settings. This is useful for returning to a known starting state. The key default settings are:

There are two common reasons for a ladder-like waveform display:

1. The horizontal time base might be set too slow for the signal frequency, resulting in too few sample points per cycle. Try increasing the horizontal time base (i.e., decreasing the sec/div value) to get a better display.

2. If the display type is set to “Vector”, the lines drawn between sample points can cause this effect if the sampling rate is insufficient. Try changing the display mode or adjusting the time base.

If no waveform is displayed, please follow these troubleshooting steps:

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

2. Ensure the channel you are using (e.g., CH1) is turned on. Press the corresponding channel menu button ([CH1] – [CH4]) to enable it.

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

4. If you are measuring a DC signal with a large amplitude, you may be off-screen. Try adjusting the vertical scale (V/div) or vertical position.

5. Press the [Auto Scale] button. This will automatically configure the oscilloscope to find and display the signal.

If these steps do not resolve the issue, please contact technical support.

If the touch screen is unresponsive, please try the following:

1. Check if the touch screen function has been locked. Press the [Touch Lock] button on the front panel to enable or disable the touch function. The button will be lit when the touch screen is locked.

2. Inspect the screen and your fingers for any dirt, grease, or moisture. Clean the screen with a soft, dry cloth if necessary.

3. Check if the oscilloscope is near a strong magnetic field. Strong magnetic interference can affect touch screen performance. If so, move the oscilloscope away from the source of the field.

If you still cannot use the touch screen, please contact Hantek technical support.

If the oscilloscope is not recognizing your USB drive, please check the following:

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

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

3. Confirm that the USB drive is formatted with the FAT32 file system. The oscilloscope may not recognize other formats like NTFS or exFAT.

4. Try restarting the oscilloscope and reinserting the USB drive.

If the problem persists, please contact Hantek technical support.