The DS Instruments DAT64F Digital Programmable Attenuator is a compact stand-alone and USB-controlled RF Step Attenuator with 0.25dB steps and a range of 0 to 63dB. This premium version features a bright OLED display and front user control buttons. Input frequency ranges from 100MHz to 6GHz. No host PC is required to use this device. Automated scripted control is extremely easy requiring no extra drivers, just a simple virtual COM port connection and SCPI based text commands. Fine-Step Digital Attenuator Specs: Frequency range: 100MHz - 6GHz (Usable from 50MHz to 7GHz) Attenuation range: 0-63dB Step Size: 0.25dB Max input power: +25.0dBm Insertion loss (@6Ghz): < 6dB Dimensions: 2.75" x 1.25" x 2.15" Return loss: > 12dB DAT64F Features: SCPI command support via USB virtual COM port Front buttons and display for stand-alone use  Standard micro-USB powered Premium gold 18GHz SMA connectors Standard Ethernet port for network control Tiny, rugged, and cost-saving! Extremely low insertion loss Common RF Applications: Automated testing environments General RF Lab use Control Systems Cellular equipment testing Production verification Educational / university lab use Aerospace / Defense Research Attenuator Images: Insertion Loss Plot:   Video Tutorials: Visit the support page for newest software and information!