The SH-75S-TC from Bird is a RF Spectrum Analyzer with Frequency 9 kHz to 7.5 GHz, Resolution Bandwidth 10 Hz to 5 MHz in 1, 2, 3, 5, 10 Steps, DANL -132 to -129 dBm/Hz (Preamp Off), -152 to -149 dBm/Hz (Preamp +20 dB), -169 to -168 dBm/Hz (Preamp +40 dB), Attenuation Range 0 to 30 dB, 1 dB step, Amplitude Flatness ±1.5 dB. Tags: Analyzer with Screen. More details for SH-75S-TC can be seen below.