主要特点:BT-3D型频率特性测试仪采用晶体管、集成电路，具有功耗小、体积小、重量轻等特点。适用于（1-300MHz）范围内各种类型放大器、CATV 器件、电视机通道、滤波器及有源和无源四端网络的频率特性测试的理想仪器。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 性能参数（Specifications）型号(Model)BT-3D项目(Item) 频率范围（Frequency range）1-300MHz扫频方式(Sweep mode)全扫、窄扫、点频(Full、Narrow、Point)频率指示(Frequency show)--扫频宽度(Sweep width)全扫(Full)1-300MHz、窄扫（Narrow）±1-20MHz连续可调（arbitrary regulation）扫频线性(Sweeping linear) 输出平坦度(Flatness output)≤±0.5dB输出平坦度补偿(Flatness output compensation) 频率标志(Frequeencymarker)1、10、50MHz 输出电平(electrical level output) 衰减器(Attenuator)10dB×7、1dB×9 相对谐波含量(Relative resonance wave content) RF输出关断比(RF tumoff output) 对数显示方式(Logarithm display mode) 电平参考线(electricallevel reference line) 功耗(Power)≤50W体积(Size)380mm(W)200mm(H)360mm(D)重量(Weight)8Kg