GENBO DMA250广播级解调器

·前面板控制,微电脑CPU控制,两位数LED显示,操作简便.

·高输出电平,低杂讯.

·自动增益控制(AGC).确保精确的频道位置.

·梳型滤波器(SAW FILTER),确保精确的旁波带处理和邻频高抑制量.

·输入可接VHF,UHF和CATV频带.

·可调整图像/伴音输出电平.

·伴音复合信号输出(MPX)(NTSC系统为标准品,PAL-B和PAL-D系统可选择).

·旁波带高抑制量.

·符合F.C.C.规格要求.

·内附变压器和电源插座,易于安装.

·适合19"标准机箱.

技术指标                                 

射频(RF)指标                              视频(VIDEO)指标

输入频率范围…….NTSC:54-860MHz          输出电平…………1Vp-p(75负载)运续可调

PAL-B:46-870MHz          频率效应………….NTSC:0-3.6MHz±1.5dB

PAL-D:46-870MHz                          PAL-B:0-4MHz,-2dB

VHF Low,VHF High,Super,                    4.43-6MHz,-2dB

Hyper和UHF                               PAL-D:0-4MHz,±1.5dB

调谐间距…………NTSC:62.5KHz                             4.43-6MHz,-2dB

PAL-B:50KHz              微分增益………….NTSC:6%

PAL-D:50KHz                                PAL-B:5%

输入电平………….-5～+25dBmV                               PAL-D:5%

噪音指数………….最高10Db                 微分相位…………..2°

假像抑制………….NTSC:VHF最低65Db       音频(AUDIO)指标

UHF最低50dB             输出电平………….500mVrms（600负载）

连续可调