The DRSA-2500B from Avcom is a RF Spectrum Analyzer with Frequency 5 MHz to 2.5 GHz, Resolution Bandwidth 10 kHz, 100 kHz, 300 kHz, 1 MHz, Amplitude 0 to -85 dBm, Power 9 W, Dynamic Range 50 dBm. Tags: USB / Computer Controlled. More details for DRSA-2500B can be seen below.