Simple and practical PC control software, you can export Touchstone (snp) files for radio design and simulation software through PC software. The improved frequency algorithm can use the odd harmonic extension of si5351 to support the measurement frequency up to 900MHz. The metal shield is designed to reduce the external interference and improve the measurement accuracy. The 50535-300MHz frequency range of the si5351 direct output provides 70dB dynamic. The extended 300M-600MHz band provides 60dB of dynamics, and the 600M-900M band is 50dB of dynamics. This is a DIY product that provides perfect vector network measurement capabilities in the size of a credit card. It includes a 2.8-inch touch screen and 450mAh battery, which can be used offline for 2 hours. For longer measurement, please connect external power supply or contact me to make a larger battery version. The TX/RX 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 (without connectors, switches) Measurement frequency: 50KHz ~ 300MHz (50KHz -900MHz, enable extended firmware) RF output: -13dbm (maximum -9dbm) Measurement range: 70dB (50kHz-300MHz), 60dB (300M-600MHz), 50dB (600M-900MHz) enable extended firmware); Port SWR: Less than 1.1 Display: 2.8 inch TFT (320 x240) USB interface: USB type-C communication mode: CDC (serial) Power: USB 5V 120mA, built-in 450mAh battery, maximum charging current 0.8A Number of scanning points: 101 (fixed) Display Tracking: 4, Marking: 4, Setting Save: 5 Measuring S parameters, voltage standing wave ratio, phase, delay, chart... Material: plastic+metal Color: as shown Package Contents:1 x host (with 450mAh battery) 1 x USB Type-C data cable 2 x 30mm SMA male to male RG174 RF cable 1 x SMA female to female connector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.