Performance Analysis and GUI Integration of NanoVNA-QT PC Software for the S-A-A-2 Vector Network Analyzer nanovna-qt pc software with the s-a-a-2

[Your Name/Affiliation] Date: April 18, 2026 Abstract The S-A-A-2 (SAA-2) is a popular low-cost, USB-C powered Vector Network Analyzer (VNA) based on the MS5351/MXO1 phase-locked loop (PLL) and a maximum frequency of 3 GHz. While the device ships with a basic embedded firmware interface, advanced measurement, data logging, and visualization require robust PC-based software. This paper evaluates NanoVNA-QT —a cross-platform desktop application—as the primary control and analysis suite for the S-A-A-2. We examine its communication protocol (USB CDC/UART), calibration routines, S-parameter plotting, time-domain reflectometry (TDR) emulation, and file export capabilities. Experimental results demonstrate that NanoVNA-QT significantly enhances the S-A-A-2’s utility for antenna design, filter tuning, and cable testing. 1. Introduction Low-cost VNAs have democratized RF engineering. The S-A-A-2 (successor to the original NanoVNA) offers improved dynamic range (typically 70–80 dB up to 1.5 GHz) and a higher frequency ceiling (50 kHz to 3 GHz). However, its onboard 2.8-inch LCD and limited button interface constrain detailed analysis. Performance Analysis and GUI Integration of NanoVNA-QT PC