Check the listing for details. 2.8inch NanoVNA Vector Analyzer Network Antenna Analyzer 2.8HF MF HF VHF UHF. Condition: New. Listed at 51.49 USD. MF HF VHF UHF talent. The vector network analyzer of DIY refers to the relevant design of Japanese edy555 (https://twitter.com/edy555)), modifies some circuits, adds battery management circuit, and redesigns PCB. A simple and practical PC control software is designed, which can be exported through PC software. Touchstone (snp) files are used in various radio design and simulation software. With the improved frequency algorithm, the odd harmonics of si5351 can be expanded to support the measurement frequency of 900MHz, and a metal shield is designed, which can reduce external interference and improve the measurement accuracy. The 50K-300MHz band directly output by si5351 provides better dynamics than 70dB, the extended 300M-600MHz band can provide better dynamics than 50dB, and the 600M-900M band is better than 40dB. This is a DIY product that provides as much vector network measurement as possible in the size of a credit card. Contains a 2.8inch touch screen, 400mAh battery, can be used offline for 2 hours, if you need a longer measurement, please connect the mobile power supply or contact me to make a larger battery version. TX/RX measurement, you can measure the complete S11 and S21 parameters, if you need to obtain S12 and S22, you need to manually replace the transceiver port wiring. Basic performance:PCB: 54mm x 85.5mm x 11mm (excluding connectors, switches).Measurement frequency: 50KHz ~ 300MHz (50KHz-900MHz, enable extended firmware).RF output:-13dbm (Max-9dbm).Frequency accuracy: < 0.5ppm.Measurement range: 70dB (50kHz-300 MHz), (50dB (300M-600MHz), 40dB (600M-900MHz) enable extended firmware).Port SWR: < 1.1.Display: 2.8in TFT (320x240).USB interface: USB type-C communication mode: CDC (serial).Power supply: USB 5V 120mA, built-in 400mAh battery, maximum charging current 0.8A.Number of calibration points: 101 (fixed).Number of scan points: 101 (fixed).Display trace: 4, tag: 4, settings save: 5.Measure S parameters, voltage standing wave ratio, phase, delay, Smith chart.