Fangrui Product Details 1.portable 1-port Vector Network Analyzer Gs320 For Measuring Matching Characteristics Of Passive And Active Radio Equipment (antennas, Cables, Filters, Attenuators, Amplifiers, Etc.). . The Device Allows You To Measure Parameters Such As Complex Reflection Coefficients, Standing Wave Ratio (vs Wr), Impedance, Conductance, Amplitude, Phase, Loss And Fault Distance In Cables. 2.the Unit Is Intended For Amateur Radio Use As It Is Not A Professional Measuring Inst Ent. The Presence Of A Built-in Battery Allows You To Make Measurements In Laboratory And External Conditions. Device Menu Language: English Operating Frequency Range: 23mhz-6200mhz Frequency Resolution, For Frequencies 100-6200 Mhz: 10khz Maximum Number Of Scan Points: 1000 Scanning Rate: 1000 Points/s The Direction Of The Bridge, Uncorrected Throughout The Range: Greater Than 12 Db Directivity Effective (after Full Single-port Calibration): Greater Than 50 Db Standing Wave Ratio At The Input: Less Than 2 Phase Measurement Precision: Greater Tha