12 to 17 db excess noise ratio noise source

{"cid":"91224244","title":"Keysight U1831C USB Smart Noise Source with 10 MHz to 26.5 GHz Range and 12 to 17 DB Excess Noise Ratio","imgUrl":"https:\/\/img.chinax.com\/nimg\/db\/7b\/4989565328046bcda1249936e215-200x200-1.jpg","attrs":{"Price":"US $10000.00 \/ Set","Brand Name":"Keysight","Model Number":"U1831C","Minimum Order Quantity":"1","Delivery Time":"15","Place of Origin":"Germany","Payment Terms":"L\/C,D\/A,D\/P,T\/T,Western Union"}}

{"cid":"91217181","title":"Keysight N4002A SNS Smart Noise Source with 10 MHz to 26.5 GHz Frequency Range and 12 dB to 17 dB ENR for Noise Figure Measurement","imgUrl":"https:\/\/img.chinax.com\/nimg\/ea\/d4\/eb6f9808ae5e89c31692b2bcfd26-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Keysight (Agilent)","Model Number":"N4002A","Minimum Order Quantity":"1 Set","Delivery Time":"3-7 Working Days","Place of Origin":"USA","Supply Ability":"In Stock","ENR":"12 dB to 17 dB (Nominal)","Payment Terms":"T\/T,Western Union,PayPal","Type":"Coaxial Noise Source","Frequency Range":"10 MHz to 26.5 GHz","Certification":"ISO 9001:2015","Compatible Analyzers":"NFA Series, PNA-X (H29 Option)","Connector":"3.5 mm (Male)","Packaging Details":"Export-grade corrugated carton with shock-proof foam insert, anti-static ESD protection, 3.5mm connector dust cap","ENR Data Storage":"Internal Electronic Memory (EEPROM)"}}