Seesii NanoVNA Vector Network Analyzer Test Board Kit User Manual

1. Introduction

This user manual provides detailed instructions for the Seesii NanoVNA Vector Network Analyzer Test Board Kit. This kit is designed to facilitate testing and analysis with various NanoVNA series devices, including NanoVNA, NanoVNA-F, NanoVNA-H, and NanoVNA-H4. It supports both plug-in and surface-mount (SMT) components, making it a versatile tool for electronic enthusiasts and professionals.

Figure 1: Overview of the Seesii NanoVNA Vector Network Analyzer Test Board Kit, showcasing the main test board and accompanying accessories for comprehensive network analysis.

2. Product Overview and Components

The NanoVNA Test Board Kit includes the following components:

• 1 x Test Board
• 6 x SMA Female Adapters
• 4 x 6mm Copper Studs
• 4 x M2.5 Screws
• 2 x 40pin Round Sockets
• 2 x 0805 49R9 Calibration Resistors

Figure 2: This image displays the individual components included in the kit, such as the test board, SMA female adapters, copper studs, M2.5 screws, round sockets, and calibration resistors, ready for assembly and use.

The test board itself features various pads and connection points designed for easy integration of components for testing. It includes areas for both through-hole and surface-mount devices, allowing for flexible testing scenarios.

Figure 3: A detailed view of the NanoVNA Test Board, highlighting the various connection points and pads for both plug-in and surface-mount (SMT) components, essential for accurate network analysis.

3. Setup and Calibration

3.1 Initial Device Setup

Before connecting the test board, ensure your NanoVNA device is powered on. The following steps are crucial for preparing your NanoVNA for accurate measurements:

1. Power On: Turn on your NanoVNA using the power switch, typically located on the top or side of the device.
2. Clear Traces: Upon startup, the NanoVNA screen may display multiple traces. To simplify the display for SWR measurements, navigate to the 'Display' menu, then 'Trace', and turn off all traces except for 'Trace 0' (the yellow trace).
3. Set Format to SWR: From the 'Display' menu, select 'Format' and choose 'SWR' to ensure the yellow trace displays the Standing Wave Ratio.
4. Remove Markers: Go to the 'Marker' menu and select 'All Off' to clear any pre-existing markers, then select 'Marker 1' to activate a single marker for precise measurements.

3.2 Calibration Procedure

Accurate calibration is essential for reliable measurements. The kit includes OPEN, SHORT, and LOAD standards for this purpose. Connect the appropriate standard to the NanoVNA's CH0 port (or the port you are using for measurement) via the provided SMA adapters as instructed by the device.

Figure 4: Small calibration standards (OPEN, SHORT, LOAD) used to ensure accurate measurements with the NanoVNA and test board.

Follow these steps for calibration:

1. Reset Calibration: In the NanoVNA menu, go to 'Cal' and select 'Reset' to clear any previous calibration data.
2. Calibrate OPEN: Connect the OPEN standard to the measurement port. In the 'Cal' menu, select 'Calibrate' and then 'OPEN'.
3. Calibrate SHORT: Connect the SHORT standard to the measurement port. In the 'Calibrate' menu, select 'SHORT'.
4. Calibrate LOAD: Connect the LOAD (50 Ohm) standard to the measurement port. In the 'Calibrate' menu, select 'LOAD'.
5. Save Calibration: Once all three standards are measured, select 'DONE' and then 'SAVE 0' (or another slot) to store your calibration.

For a visual demonstration of the setup and calibration process, please refer to the video below:

4. Operating the Test Board

4.1 Connecting Devices Under Test (DUT)

After calibration, you can connect your components to the test board. Use the appropriate connection points for plug-in or SMT devices. Ensure all connections are secure to avoid inaccurate readings.

Figure 5: A NanoVNA device is shown connected to the test board via SMA cables, illustrating a typical setup for performing measurements and analysis of electronic components.

4.2 Performing Measurements

To measure your DUT, follow these steps:

1. Set Frequency Range: In the NanoVNA menu, go to 'Stimulus' and set your desired 'Start' and 'Stop' frequencies to define the sweep range for your measurement.
2. Observe SWR: The yellow trace on the screen will display the SWR across your selected frequency range. Look for dips in the SWR curve, which indicate resonance points.
3. Use Markers: Activate 'Marker 1' (or other markers) and move it along the SWR trace to pinpoint specific frequencies and their corresponding SWR values. The minimum SWR indicates the optimal operating frequency for your DUT.

It is important to perform measurements in a clear environment, away from large metal objects or other electronic devices that could interfere with readings. The presence of surrounding metal or even your body can significantly affect SWR measurements.

5. Maintenance and Care

To ensure the longevity and accuracy of your NanoVNA Test Board Kit, observe the following maintenance guidelines:

• Keep the test board and all connectors clean and free from dust, dirt, and moisture. Use a soft, dry cloth for cleaning.
• Store the calibration standards (OPEN, SHORT, LOAD) in their protective packaging when not in use to prevent physical damage or contamination.
• Avoid overtightening SMA connectors, as this can damage the threads or the internal components.

6. Troubleshooting Common Issues

If you encounter issues during operation, consider the following troubleshooting steps:

• Inaccurate SWR Readings:
• Re-perform the calibration procedure, ensuring all standards are correctly connected and measured.
• Check all cable connections for tightness and continuity.
• Ensure the measurement environment is clear of large metal objects or other RF interference sources.
• No Signal or Erratic Display:
• Verify that the NanoVNA is properly powered on and charged.
• Inspect SMA cables for any damage or kinks.
• Confirm that the correct ports (CH0/CH1) are being used for measurement.

7. Product Specifications

8. Warranty and Support

The Seesii NanoVNA Vector Network Analyzer Test Board Kit comes with a 36-month warranty, ensuring long-term reliability and customer satisfaction. For any inquiries or support needs, Seesii is committed to providing a 24-hour quick response and aims for 100% customer satisfaction.

For further assistance or to explore other Seesii products, please visit the Seesii Store.