主要特點:BT-3D型頻率特性測試儀采用晶體管、集成電路，具有功耗小、體積小、重量輕等特點。適用于（1-300MHz）范圍內各種類型放大器、CATV 器件、電視機通道、濾波器及有源和無源四端網絡的頻率特性測試的理想儀器。The main characteristics:BT-3D-frequency characteristics tester using transistors, integrated circuits, with a small power consumption, small size, light weight and so on. Apply (1-500MHz) within the framework of various types of amplifiers, CATV devices, the TV channel, filter and four-terminal network of active and passive frequency characteristics of an ideal test equipment.Specifications 性能參數（Specifications）型號(Model)BT-3D項目(Item) 頻率范圍（Frequency range）1-300MHz掃頻方式(Sweep mode)全掃、窄掃、點頻(Full、Narrow、Point)頻率指示(Frequency show)--掃頻寬度(Sweep width)全掃(Full)1-300MHz、窄掃（Narrow）±1-20MHz連續可調（arbitrary regulation）掃頻線性(Sweeping linear) 輸出平坦度(Flatness output)≤±0.5dB輸出平坦度補償(Flatness output compensation) 頻率標志(Frequeencymarker)1、10、50MHz 輸出電平(electrical level output) 衰減器(Attenuator)10dB×7、1dB×9 相對諧波含量(Relative resonance wave content) RF輸出關斷比(RF tumoff output) 對數顯示方式(Logarithm display mode) 電平參考線(electricallevel reference line) 功耗(Power)≤50W體積(Size)380mm(W)200mm(H)360mm(D)重量(Weight)8Kg