Features.PC control software can export touchstone (snp) files that can be used in a variety of radio design and simulation software.The improved frequency algorithm can use the odd harmonic extension of the si5351 to support measurement frequencies up to 900MHz.It is primarily intended for research by customers who can DIY, you will need to prepare your own SMA cable.It does not have a metal shield. The main advantage is that the do-it-yourself user can open the machine to see the circuit structure. However, when measuring frequencies above 300M, it is susceptible to interference from other signals. It is therefore recommended for learning the principles and for use at lower frequencies.The 50k-300MHz frequency range of the si5351 direct output provides better than 70dB of dynamics.The extended 300M-600MHz band offers better than 50dB of dynamics and the 600M-900M band better than 40dB of dynamics.Small, portable and easy to use, this project is designed to provide the audiophile with an RF gadget but a useful instrument.