The PXIe-5661 from National Instruments Corporation is a RF Spectrum Analyzer with Frequency 9 kHz to 2.7 GHz, Resolution Bandwidth 20 MHz, Third Order Intercept(TOI) 28 dBm, Dynamic Range 80 dB, Phase Noise -90 dBc/Hz. Tags: PXI. More details for PXIe-5661 can be seen below.