HANTEK HRDO4304C (01) PDF Document

To avoid injury and prevent damage to your HANTEK HRDO4304C, 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 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.

Ground the product: To avoid electric shocks, the product is grounded through a grounding conductor of the power cable. The grounding conductor 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 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 the cover or panel open.

Avoid circuit exposure: Do not touch exposed connectors and components after 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.

The manual and product use specific terms and signs to indicate potential hazards:

Security terms in the manual:

Warning: Indicates that the operation may not cause immediate damage to you.

Note: Indicates that the operation may cause damage to the product or other property.

Safety terms on the product:

Warning: Indicates a potential hazard may be caused to you if you do not perform this operation.

Safety signs on the product: There are symbols for “Hazardous Voltage” and “Safety Warning”.

Ventilation Requirement:

The HANTEK HRDO4304C uses a fan for cooling. Ensure that the air intake and exhaust areas are free from obstructions. When using the oscilloscope on a bench-top or rack, provide at least 10 cm of clearance beside, above, and behind the instrument for adequate ventilation. Inadequate ventilation can cause a temperature increase and damage the instrument.

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

Follow these steps to clean the outer surface of the instrument:

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, do not use any corrosive or chemical cleaning reagents.

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

1. General Examination:

Check the shipping package for any damage caused by transportation.

Check that all accessories listed in Appendix A are present and undamaged.

Check the machine for any physical damage.

2. Adjust the Supporting Legs:

Adjust the bracket at the bottom of the machine to tilt the oscilloscope upwards for better viewing and operation.

3. Connect to AC Power:

Use the provided power cord to connect the oscilloscope to a power supply matching the specifications: 47-440Hz, 90-264VAC/127-320VDC, 80Watts MAX. Ensure the instrument is correctly grounded.

4. Turn-on Checkout:

Press the power button on the lower left of the front panel. During startup, all button lights will illuminate, and the oscilloscope will perform self-checks. The startup screen will appear upon completion.

5. Function Inspection:

Click on [Default Setup] to restore factory settings.

Connect the probe’s grounding clamp to the grounding terminal.

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

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

Observe the waveform to ensure a square wave is displayed normally. If not, perform a Probe Compensation.

When connecting a probe to any input channel for the first time, you must perform this adjustment to match the probe with the channel. Uncompensated probes can lead to measurement errors.

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

2. Compare the displayed waveform with the standard compensation waveforms:

Perfectly compensated: A flat-topped square wave.

Over compensated: The top of the square wave overshoots.

Under compensated: The top of the square wave is rounded.

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

The HANTEK HRDO4304C features a multi-touch screen that supports several gestures:

1. Tap:

Tap a menu or function on the screen with one finger to operate it, set parameters with the pop-up numeric keyboard, or close pop-up windows.

2. Drag:

After tapping and holding a target, drag it to the desired position. This can be used to change a waveform’s displacement/offset or to move a window.

3. Pinch & Stretch:

Bring two fingers together (pinch) or move them apart (stretch) on the screen to amplify or reduce the waveform. Vertical pinching/stretching adjusts the vertical scale, while horizontal pinching/stretching adjusts the horizontal time base.

4. Rectangle Drawing:

Click the Hantek logo, then click on AreaSel to switch to 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,” “Enlarge Vertical,” or “Enlarge Waveform” for the selected area.

To Enable an Analog Channel (e.g., CH1):

Click on the channel status label at the bottom of the screen. The label will light up, and the corresponding [CH1] button in the button area will also light up.

Alternatively, press the [CH1] button directly on the front panel.

To Disable an Analog Channel:

If the channel is already open and selected, press its corresponding button (e.g., [CH1]) once to close it.

If the channel is open but not selected, press its button once to select it, and then press it again to close it.

Use the touch screen to close the channel by clicking on the channel number in the menu at the bottom of the screen.

For any active channel (e.g., CH1), you can adjust the following vertical settings:

To Adjust the Vertical Scale (V/div):

Rotate the vertical gear knob corresponding to the channel. Clockwise decreases the V/div (zooms in), and counter-clockwise increases it (zooms out).

Use the touch screen by clicking the channel menu at the bottom and setting the scale in the pop-up menu.

To Adjust the Vertical Offset:

Rotate the vertical offset knob to move the waveform up or down. Press the knob to reset the offset to zero.

Use the drag gesture on the touch screen to move the waveform vertically.

To Set Channel Coupling:

Open the vertical menu for the channel and click on Coupling. Select from:

DC: Passes both AC and DC components of the signal.

AC: Blocks the DC component and passes only the AC component.

GND: Disconnects the input signal and grounds the channel input to display a zero-volt reference.

To Set Bandwidth Limit:

Open the channel menu and click on BW Limit. You can select to turn it off or limit the bandwidth to 20M, 100M, 200M, or 350M to reduce noise.

To Set Input Impedance:

Open the channel menu and click on the Impedance tab. Select either 1M Ω (high impedance) or 50 Ω (for matching with 50 Ω sources).

To Invert the Waveform:

Open the channel menu, click on the inverting menu, and toggle the inverting switch flag on or off. When on, the waveform’s voltage value is inverted.

The HANTEK HRDO4304C allows you to manually set the probe attenuation ratio to ensure correct measurement results. The available ratios are:

To Adjust the Horizontal Time Base (s/div):

Rotate the horizontal time base knob. Clockwise decreases the time/division (zooms in), and counter-clockwise increases it (zooms out).

Click on the horizontal time base label at the top of the screen and use the pop-up menu to enter a value directly.

Use the horizontal pinch/stretch gesture on the touch screen.

To Adjust the Horizontal Position:

Rotate the horizontal position knob to move the waveform left or right. This changes the trigger position relative to the center of the screen.

Click on the horizontal displacement label at the top of the screen and use the pop-up menu to set a value.

Use the drag gesture on the touch screen to move the waveform horizontally.

You can select the acquisition mode by pressing the [Acquire] button. The modes are:

Normal: The oscilloscope samples the signal at equal time intervals to reconstruct the waveform. This 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.

Peak: The oscilloscope collects the maximum and minimum values of the signal within each sampling interval to obtain the signal’s envelope. This mode is useful for capturing narrow pulses and avoiding aliasing.

High Resolution: This mode uses supersampling to average adjacent points of a single sampled waveform, reducing random noise and producing a smoother waveform. It is used when the sampling rate is higher than the storage rate of the acquisition memory.

Press the [Trig Menu] button or click the trigger tab at the top of the screen to access trigger settings.

Trigger Level: Rotate the Trigger knob to move the trigger level up or down on the waveform. Press the knob to set the level to 50% of the waveform peak value.

Trigger Source: In the menu, select the source for the trigger. Options include CH1-CH4, EXT, and Digital channels (if applicable).

Trigger Mode: Select how the oscilloscope acquires data when a trigger condition is met.

Auto: The oscilloscope acquires a waveform even if a trigger event does not occur.

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

Single: The oscilloscope acquires one waveform when a trigger event occurs and then stops.

Trigger Type: Select the type of event to trigger on. Common types include Edge, Pulse, Video, Slope, etc. (See specific trigger type questions for details).

Trigger Holdoff: Set a period of time after a trigger during which the oscilloscope will not trigger again. This is useful for stabilizing complex or periodic waveforms. The range is 8ns to 10s.

The edge trigger identifies a trigger by searching for a specified edge and voltage level on the waveform.

1. Press [Trig Menu].

2. Click on the Type menu label and select “Edge”.

3. Click on the Source menu tab to select the trigger source (CH1-CH4, EXT, Digital channels).

4. Click on the Slope Type menu label and select the edge type:

Rising: Trigger on the signal’s rising edge.

Falling: Trigger on the signal’s falling edge.

Either: Trigger on either the rising or falling edge.

5. Adjust the Trigger Level using the Trigger knob to set the voltage level at which the trigger occurs.

6. If needed, set the Holdoff value to stabilize the display.

Press the [Math] button to enter the mathematical operation menu.

For Arithmetic Operations (A+B, A-B, A*B, A/B):

1. In the Math menu, click the Operator menu tab and select the desired operation (e.g., A+B).

2. Click Operation to turn the math function on.

3. Click on Source A and Source B to select the source channels (e.g., CH1, CH2).

4. Adjust the Scale (vertical gear) and Offset for the resulting math waveform using the corresponding menu options or the multifunction knob.

For FFT (Fast Fourier Transform):

1. In the Math menu, click the Operator menu tab and select FFT.

2. Click Operation to turn the FFT function on.

3. Select the Source channel for the FFT.

4. Set the X frequency range by defining either the Span and Center frequency or the Start and End frequency.

5. Select a Window function (e.g., Hanning, Rectangular) to reduce spectral leakage. The choice depends on the signal type.

6. Adjust the Scale (vertical gear) and Offset for the FFT display.

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

To Add a Measurement:

1. In the Meas menu, go to Add -> Category to select a measurement category: Horizontal, Vertical, or Other.

2. A list of specific parameters will appear (e.g., Freq, Period, VMax, VMin). Click on the parameter you want to measure.

3. Go to Add -> Source A (and Source B for ‘Other’ parameters) to select the channel(s) you want to measure.

4. The measurement result will appear at the bottom of the screen.

To View All Measurements for a Channel:

Press [Meas] -> All Measure and select the channel (CH1-CH4). A table with all available measurement parameters and their values for that channel will be displayed.

To Use Statistics:

After adding a measurement, click on the Statistic menu tab in the Meas menu to open the statistics function. This will display the current, average, max, min, standard deviation, and count for the active measurements.

Press the [Cursors] button to enter the cursor setting menu. A measurement window will appear on the screen.

1. Select Cursor Mode:

Click on the Mode menu tab and select Manual or Tracking. ‘None’ turns cursors off.

2. Select Cursor Type:

In Manual mode, click the Select menu tab and choose:

X: Two vertical cursors (A and B) for measuring time and frequency.

Y: Two horizontal cursors (A and B) for measuring voltage.

3. Select Source:

Click the Source menu tab to select the channel waveform to measure.

4. Adjust Cursor Position:

Use the menu tabs for AX, BX (for X cursors) or AY, BY (for Y cursors) to select a cursor. Then, rotate the multifunction knob (V0) to move it.

Use the AXBX or AYBY tabs to move both cursors simultaneously while maintaining their spacing.

Reading Measurements:

The cursor measurement window displays the absolute position of each cursor (AX, BX, AY, BY) and the difference between them (BX-AX or BY-AY).

Press the [Save/Recall] button to open the save/recall menu. You can save to internal memory or an external USB drive.

To Save an Image:

1. Click on Save Image.

2. Select the Format (*.png, *.bmp, *.jpg, or *.tif).

3. Set a File Name using the pop-up keyboard.

4. Choose other options like Invert or Color.

5. Click Save.

To Save a Waveform:

1. Click on Save Wave.

2. Select the Data Source (Screen or Memory).

3. Select the Format (*.bin or *.csv).

4. Set a File Name.

5. Click Save.

To Save a Setup:

1. Click on Save Setup.

2. Set a File Name.

3. Click Save to save the current oscilloscope settings.

To Load a Waveform or Setup:

1. Click on Load Wave or Load Setup.

2. The disk management interface will open. Navigate to the desired file using the multifunction knob or touch screen.

3. Select the file and click the Load menu tab.

1. The horizontal time base might be too low (too fast). Try increasing the horizontal time base (e.g., from 1ns to 10ns) to improve the display.

2. If the display type is set to “Vector” in the Display menu, the lines drawn between sample points can sometimes cause a ladder-like appearance. This is more noticeable at fast time base settings.

1. Check if the power switch of the oscilloscope is turned on.

2. Check if the fuse is intact. If a fuse needs to be replaced, please use a fuse that meets the product’s specifications.

3. If the button board still does not light up, please contact Hantek technical support.

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

2. Check if the channel you are using is turned on (check the CH1-CH4 menu buttons).

3. Verify 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).

5. Press the [Auto Scale] button to have the oscilloscope automatically detect the signal and adjust its settings.

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

1. Check if the touch screen function has been disabled. If so, press the [Touch Lock] key in the button area to turn the touch function back on.

2. Check if there is any dirt on the screen or your fingers. If there is, please clean it first.

3. Check if the oscilloscope is close to a strong magnetic field. If it is, move it away from the magnetic field.

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

1. Check if the USB drive is functioning properly by testing it on 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 drive is FAT32.

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

If the problem persists, please contact technical support.