RSA306B USB Real Time RF Spectrum Analyzer | Tektronix
Amazon.com: Walfront Vector Network Analyzer Portable VNA Measurement Tool 10K1.5G Spectrum Analyzers Antenna Analyzer USB Type C 4in Display : Industrial & Scientific
Spectrum Analyzer Board, High Accuracy Signal Source Module, 35‑4400M USB Network Signal Analysis with Tracking Source: Amazon.com: Industrial & Scientific