ITEM NAME:DC12V / 0.3A SMA Noise Source Simple Spectrum External Generator Tracking Source Description: Power: DC12V/0.3A Output connect: SMA Reference ENR: 0.1G/60DB 0.5G/55DB,1G/52DB, 1.5G/48DB 2G/38DB 2.5G/30DB,3G/27DB,3.5G/20DB Q: what is this? What is used for? B: noise source, generator noise, used tracking generator, jam source Q: what is the basic principle and how to use? B: used special voltage regulator tube, generator white noise and then amplifier. Directly replace tracking generator. Q: what is ENR? A: ENR (Excess Noise Ratio), noise sources over standard noise temperature T0 thermal noise. Here refers to the difference of no input noise source and input noise source signal level. Specification: Material: fr-4 glass fiber coated copper plate Size: approx. 70 x 43 x 12mm/2.8 x 1.7 x 0.5inch Package Includes: 1 Piece Noise Source Simple External Generator Tracking Source SKU: DMO0013417873002748.Output connect: SMA. A: ENR (Excess Noise Ratio), noise sources over standard noise temperature T0 thermal noise. Here refers to the difference of no input noise source and input noise source signal level.