Feature: 1. Application: The filter attenuator can be matched with NanoVNA F measuring 6.5m/21.3ft ceramic notch filter. PCB filter sensor for VNA. 2. Superior Performance: The RF demo kit can be matched with NanoVNA F measurement homemade low pass filter, the 3dB bandwidth is about 400MHz. 3. Practical Equipment: RF Demo Kit RF test board demo calibration board for learning vector network analyzer, antenna analyzer test calibration learning. 4. High Accuracy: The metal shielding is designed to reduce the external interference and improve the measurement accuracy. 5. Safe and Reliable: Each module is well selected of high quality and great reliability. The board is small and light ,suitable for carrying with. Specification: Item Type: Filter Attenuator Material: PCB Description: PCB Dmension 10x10cm/ 3.9x3.9in for Learning Vector Network Analyzer, Including: 1. RLC Series Parallel Circuit 1 2. RLC Series Parallel Circuit 2 3. 33Ohm Resistance, SWR Standing Wave = 1.5 4. 75Ohm Resistance, SWR Standing Wave = 1.5 5. BSF Ceramic Filter Element, Central Frequency 6.5mhz 6. BPF Ceramic Filter Element, Center Frequency 10.7MHz RC Series Circuit 8. LC Series Circuit 9. Capacitance 10. Inductance 11. LPF Homemade Low Pass Filter, 3dB Bandwidth 400MHz 12. HPF Homemade High Pass Filter, 3dB Bandwidth 500MHz 13. Short Circuit The Calibration Circuit 14. Open Circuit Calibration Circuit 15. 50ohm Load Calibration Circuit 16. Direct Connection 17. 10 dB Attenuation Circuit 18. 3dB Attenuation Circuit 19. Each Group of Functional Circuits. Package List: 1 x Filter Attenuator 2 x Adapter Cable Note: Do not overload.