The R3172 and R3182 are low-cost portable spectrum analyzers capable of performing direct input measurements at a maximum frequency 26.5 and 40 GHz respectively. Adopting newly designed RF circuitry, both the R3172 and R3182 aim for improved basic performance with their 40 GHz direct input capability. Further, the R3172 and R3182 achieve "best-in-class" performance for average display noise levels of -104 dBm (at 26.5 GHz, RBW 1 kHz) and -106 dBm (at 40 GHz, RBW 1kHz) respectively, and SSB phase noise levels of -91 dBc/Hz (at 26.5 GHz, 20 kHz offset) and -85 dBc/Hz (at 40 GHz, 20 kHz offset) respectively. Operating frequencies for radio communications have increasing tendency to shift to higher frequencies. Accordingly, the R3172 and R3182 have been developed as personal-use spectrum analyzers capable of use in a wide range of applications from development to manufacturing of high frequency modules, devices, etc