Tektronix RSA603A USB Real-Time Spectrum Analyzer: 40 MHz, 9 kHz to 3 GHz, RSA600 Series
Tektronix RSA607A USB Real-Time Spectrum Analyzer: 40 MHz, 9 kHz to 7.5 GHz, RSA600 Series, USB connectivity, real-time analysis, wide frequency range, high performance, spectrum analysis.