9KHz-3GHz Near Field Probe Is A Device Used To Measure Electromagnetic Signals. It Can Detect Electromagnetic Radiation In The Range From 9 Kilohertz To 3 Gigahertz And Operates Relatively Close To The Measurement Target. This Type Of Probe Is Commonly Used For Testing Areas Such As Radio Spectrum, Electromagnetic Compatibility And Radio Equipment. The Working Principle Of The Near-Field Probe Is To Measure The Signal By Receiving The Intensity Of The Electromagnetic Field. It Usually Consists Of A Radio Antenna And A Receiver That Converts Received Electromagnetic Signals Into Electrical Signals That Can Be Analyzed And Measured. These Probes Can Be Connected To Instruments Or Measurement Equipment, Such As Spectrum Analyzers Or Oscilloscopes, To Obtain More Detailed Data And Graphical Representations. When Using A 9khz-3ghz Near Field Probe, You Need To Pay Attention To Keeping The Distance Between The Probe And The Object Being Measured Close To Accurate Measurement. In Addition, The Influence Of Other Electromagnetic Sources That May Cause Interference Should Be Avoided.In Short, The 9Khz-3Ghz Near Field Probe Is A Device Used To Measure Electromagnetic Signals And Is Mainly Used For Testing Radio Spectrum, Electromagnetic Compatibility And Radio Equipment. Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Model: 9khz-3ghz Near Field Probe (Please Keep Your Hands Away From The Pcb Board When Using It) Working Frequency: 9khz-3ghz; Connector: Sma Female How To Use The Near Field Probe: Main Equipment: Spectrum Analyzer Or Receiver, Preamplifier, Near-Field Probe As Shown Below 2. How To Use: Set The Frequency Range And Bandwidth Of The Spectrum Analyzer (Set A High Frequency Span To Understand The Overall Radiation Of The Device Under Test), And Enter The Correction Factor Of The Preamplifier On The Spectrum Analyzer. Choose An Appropriate Near-Field Probe. Take Our Commonly Used Ring Magnetic Field Probe As An Example. The Larger The Ring Probe, The Higher The Sensitivity, The Larger The Test Area, And The Lower The Resolution. The More Recommended Is To Use A Set Of Probes Of Multiple Sizes. When Testing A Large Area, Use A Larger Probe To Find The Suspected Area, And Then Gradually Reduce The Probe Size To Locate The Interference Source. To Locate Of Interference, It Is Necessary To Compare The Test Results Of The Device Under Test With The Test Results Of The Reference Device To Predict Whether The Device Under Test Passes The Consistency Test. Colour:As Shown Material:ABS+metal Package Contents: 1 Set Of Magnetic Field Probe Accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.