服务热线: 400-018-5117
最新动态 / News more
发布时间: 2018 - 10 - 10
噪声是电子电路的特性之一它会导致发射机和接收机之间有用信息的随机干扰会影响无线系统的整体性能信号/频谱分析仪是宽带接收机内部噪声会影响极低幅度信号的测量如何解决呢?今天我们为大家带来解决方案帮助大家提高小信号测量的灵敏度和精度尤其针对噪声附近的信号得益于是德科技 X 系列信号分析仪新增加的测量迹线设置表功能让实验更快的达到测量目的图 1:调整分析仪的设置,可以改善该仪器的本底噪声减小分辨率带宽当分辨率带宽从100 kHz 减少至 10 kHz 时,图 1 中 蓝色迹线 的本底噪声降低了 10 dB。 通过这种技巧可以进一步降低本底噪声。减小频谱仪的衰减通过手动的方式,将分析仪的输入衰减器下调至 0 dB,图 1 中的 红色迹线 显示了设置为 0 dB 衰减后,改善的本底噪声。使用前置放大器配置前置放大器,如图 1 中 绿色迹线 所示,前置放大器改善了系统的噪声系数,降低了本底噪声。是德科技 X 系列信号分析仪具备本底噪声扩展(NFE)功能可以提高分析仪的灵敏度打开NFE,剔除频谱仪自身的噪声NFE 能够识别电流仪表状态信号中的噪声,并可以自动将其从实时频谱结果的测量中删去。图1 中的 红色迹线 显示,应用 NFE 进行测量,可以使本底噪声额外降低8dB。NFE 将有效本底噪声改善了 10 dB使用“过扫描”功能加速扫描使用全数字中频“过扫描”技巧能够显示数字分辨率带宽响应的特点,并纠正这些错误,从而获得更快的扫描速率,取决于特定的设置,扫描时间可以从秒级缩短到毫秒级。“过扫描”对分辨率带宽滤波器产生的影响
最新案例 / Case more
sv_complex.aspx?Fid=n8:8:8
最新方案 / Soluon more
产品 Products
产品名称:

7709B误码率测试仪

上市日期: 2018-04-11
  • 产品概述
  • 产品规格
  • 详细参数

7709B  BER TESTER


General:

This device is a bit error rate tester from the input in the TS (Transport Stream) format. When this device and Eiden’s Advanced BS Digital Signal Generator 3256A are combined, the bit error rate of stream corresponding to the frame configuration based on ARIB STD-B44 2.0 Revised version (Transmission System for Advanced Wideband Digital Satellite Broadcasting) can be measured. This device provides the environment that the bit error rate measurement against the complex frame configuration can be measured easily. In addition, this device can measure the bit error rate of the TS packets in each digital television broadcast.

Features:

When connecting Eiden’s 3256A Advanced BS Digital Signal Generator, this device can measure the error rate of the MPEG-2 TS in the advanced BS broadcast system. This device can measure up to eight points at the same time after the choice of the relative stream number or the transmission mode. The signal in the TLV (Type Length Value) format can be checked. Each setting information are shared by 3256A and this device. Thus, the measurement environment can be constructed easily.  When Eiden’s OFDM modulator is connected to this device and when the internal PRBS data of this device are used, the BER measurement of the MPEG TS in the terrestrial digital broadcast and so on is possible.  This device is equipped with the transmitter generating the signal for the measurement and the receiver for the measurement signal. * The MPEG TS packet and the PRBS data of the data for the measurement can be generated.  The Packet Error Rate (PER) can be measured.  The Erroneous Second Ratio (ESR) can be measured.  The null-packet filtering function is equipped.  The Ethernet terminal for the remote control interface is equipped.  A seven-inches WVGA touch-panel is equipped. Thus, an excellent operation ability is provided.


Function Specifications:

7709B数字电视信号发生器


相关产品 / Products More
Copyright ©2005 - 2013 上海精测电子有限公司
犀牛云提供企业云服务

上海市北京东路668号12层B2,

深圳市科技南六路29号万德莱大厦南3A

 400-018-5117,0755-88265155 
传真:+86 0755-2788 8009
邮编:330520

上海精测电子有限公司,深圳精测实业发展有限公司