The Decimator D4 from Tallysman Wireless is a RF Spectrum Analyzer with Frequency 5 MHz to 6.5 GHz (with 50 ohm SMA), 5 MHz to 3 GHz (with 75 ohm F Connector), Frequency Resolution 1 Hz, Resolution Bandwidth 1 Hz to 15 MHz, Analysis Bandwidth Up to 260 MHz, Noise Floor -150 to -130 dBm/Hz. Tags: USB / Computer Controlled. More details for Decimator D4 can be seen below.