BG-100+(电视主同步信号发生器)

电视场强仪 DS1001介绍电视场强仪是一种用来测量电视信号场强的仪器，它通常会在电视台、电子维修商、电视监测中心等场所使用。

其中，DS1001是一款性能稳定、精确可靠的电视场强仪。

功能•测量电视信号场强•测量电视信号质量•支持多种信号标准•显示信号频率、信号强度和信号质量等信息技术参数频率范围DS1001的频率范围为 45MHz ~ 1000MHz，支持绝大多数地区的电视信号标准。

精度•场强测量精度：±2dB•频率测量精度：±0.5MHz•图像质量判读精度：5 levels反应时间•响应时间：<2S•扫描速度：2s/次显示方式•显示方式：液晶数字显示•显示内容：频率、场强、图像质量等电源•电源类型：4节 AA 电池或直流电源适配器•工作时间：约 4 小时（电池供电）•充电时间：约 8 小时应用场景DS1001电视场强仪可以用来检测电视信号的强度和质量，适用于以下场景：•电视台：检测电视信号强度和质量，保证电视播出效果•电视监测中心：监测电视信号状况，以提高信号的传输质量和稳定性•电子维修商：检测电视信号强度和质量，以故障排查和维修使用方法使用电视场强仪有一定的技术要求，下面简要介绍一下使用方法：步骤一：安装天线电视场强仪需要与天线相连才能检测电视信号场强。

因此，需要先将天线安装在信号出现问题的地方，并确保它可以正常接收电视信号。

步骤二：打开电视场强仪打开电视场强仪后，选择需要检测的信号标准（如 PAL、NTSC），并确保电视场强仪与天线相连。

步骤三：检测电视信号启动电视场强仪后，可以通过测量仪器的数字显示来判断电视信号的强度、频率和质量，并以此来调整天线的位置和方向，以获得更好的电视信号质量。

在使用中，还需要注意选择正确的测量模式和调整电视场强仪的灵敏度。

总结作为一款高性能的电视场强仪，DS1001具备了精准的场强测量和图像质量判断功能，并支持多种信号标准。

使用它可以非常方便地检测电视信号的强度和质量，适用于电视台、电子维修商、电视监测中心等场所使用。

创高电子TVB595 USB接口多标准数字电视信号发生器
佚名
【期刊名称】《电视技术》
【年(卷),期】2008(32)5
【摘要】产品概述 TVB595 USB接口多标准数字电视信号发生器能够播放硬盘中和由DVB—ASI／SMPTE-310M输入的MPEG-TS码流，产生各种数字电视的射频信号。

可选的输出射频信号频率为55～860MHz及964～1700MHz．符合工
业标准。

信号发生器中的合成器能够产生稳定且精确的时钟及调整频率。

本产品是目前业界新款，体积小巧，使用便利，可广泛用于实验室，研究室和移动应用环境。

【总页数】1页(P48-48)
【关键词】电视信号发生器;USB接口;准数;电子;射频信号;信号频率;TS码流;数字
电视
【正文语种】中文
【中图分类】TN949.6;TP334.7
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Product FlyerVersion 01.00R&S®SMCV100BVECTOR SIGNAL GENERATORMaximum flexibility in applicationsand in productionyearRohde & Schwarz R&S®SMCV100B Vector Signal Generator 32 Rohde & Schwarz R&S®SMCV100B Vector Signal Generator 4HIGHLIGHTSOVERVIEWGeneral purpose►Multistandard platform for the applications –Broadcast –Navigation –Cellular–Wireless►For labs and manufacturersLabs►Research►NB-IoT device development ►Quality assurance ►EMC test houses►Education, universitiesArbitrary waveform generation►ARB with multisegment and multicarrier feature ►1 Gsample memory►R&S®WinIQSIM2™ waveform generation support►NB-IoT, IEEE 802.11xx, Bluetooth®, 5G NR and more►Test signals: rectangular, sinusoidal, pulseCustom digital modulation►Maximum flexibility in designing signals ►Huge number of digital modulation types ►Quick access to digital modulation types►Predefined settings for communications standards ►Definable data listsReal-time broadcast signal generation►All major audio and video broadcast standards ►ATSC 3.0, DVB-T2, DVB-S2X, HD Radio™, etc. ►SFN support with 1 PPS and 10 MHz►IP interface for 2nd and 3rd generation standards►Internal TS and audio player/generatorI/Q streaming and playback►Streaming of long I/Q sequences ►RF bandwidth up to 56 MHz ►Internal streaming from 64 Gbyte SSD ►External memory device support via USB 3.0►Electrical and optical SFP+ interfaceFully software defined vector signal generator►Unique basic hardware platform with Linux OS ►Pure software based option concept ►Highest flexibility in instrument configuration ►Flexible license concept►Expandable for future requirementsIntuitive graphical user interface►5" touchscreen for convenient operation ►Block diagram optimized for intuitive use ►Instrument status overview ►Configurable soft buttons►Direct access to each functional blockAPPLICATION AREASUSABILITYG E N E R A T I O N O F W I D E V A R I E T Y O F S I G N A L SEMC testing and validation►Streaming of long I/Q sequences ►Streaming RF bandwidth up to 56 MHz ►Internal and external memory device support►Real-time broadcast signal generation with continuous playout of test patterns►EMC stream library for CISPR 32Manufacturing►For automotive, consumer electronics and electronics manufacturing services (EMS) ►Functional tester/end of line tester (EOLT) ►Perfect instrument for line standardization ►High RF output power of up to +25 dBm►R&S®LegacyPro for R&S®SFE100 replacementCompact solution►Compact instrument►Space saving ½ 19" rack size, 2 HU►Optimized cooling and air-flow concept for side-by-side mounting►Lowest acoustic noise emission ►Economic power consumption►Very low weight of 4.7 kg (10.36 lb)SCPI recorder►Time and cost saving automation►Built-in SCPI macro recorder with code generator►Automatic recording of all manual settings ►Creation of executable MATLAB® script►Export of SCPI listsFully software based signal generation►Real-time signal generation or waveform playback from ARB►Powerful FPGA and processor platform►Upgrade baseband capabilities by keycodeDirect RF DAC concept for RF signalg eneration up to 2.5 GHz ►Direct RF DAC signal generation ►Low phase noise option►Improved SSB performance after FM demodulation►Crest factor reduction optionWide RF frequency range►4 kHz up to 7.125 GHz►Software definable instruments with 3 GHz, 6 GHz and 7.125 GHz►5G NR extended FR1 support up to 7.125 GHzLarge RF modulation bandwidth►Scalable bandwidth via software options: 60 MHz, 120 MHz, 160 MHz and 240 MHz ►Best prepared for new upcoming signals►IEEE 802.11 a/b/g/n/j/p/ac/ax supportM O D E R N S I G N A L G E N E R A T I O N C O N C E P TModern and flexibleThe R&S®SMCV100B vector signal generator uses thel atest direct digital RF upconversion technology for signal generation. Thanks to its powerful, fully software based platform, it is the ideal solution for flexible use in various applications, including: ►Research►NB-IoT device development ►Quality assurance ►EMC test houses►Education, universitiesPerfect match for a wide range of signalsThe R&S®SMCV100B generates non-cellular and cellular communications signals, broadcast and navigation signals and user-specific signals, effectively addressing a wide range of applications. The vector signal generator sup-ports the various current digital standards such as 5G NR, NB-IoT , ATSC 3.0 and GNSS. Users can also create their own signals with the custom digital modulation o ption. This option provides different digital modulation types as well as predefined settings for selected communica-tions standards, giving users maximum flexibility in signal generation.Latest transmission standards for testing 5G NR and NB-IoT devicesThe R&S®SMCV100B can be used to generate signals in line with the most important communications s tandards such as 5G NR and LTE. It is ideal for component tests and basic functional receiver tests. With a maximum RF fre -quency of 7.125 GHz, the R&S®SMCV100B s upports the 5G NR e xtended FR1 frequency range. The maximum modulation bandwidth of 240 MHz enables genera-tion of signals for all current Wi-Fi standards, making the R&S®SMCV100B the perfect solution for the production of IoT devices.Fully software defined vector signal generatorThe R&S®SMCV100B option concept is fully software based. No additional hardware needs to be installed for full device functionality. This applies to upgrading the f requency option, the memory depth of the ARB generator, the I/Q modulation bandwidth and all o ther R&S®SMCV100B options that can be used to cover d ifferent applications.Perfect fit in the lab and in productionWith its compact housing, the R&S®SMCV100B is the perfect solution for the lab bench and where lab space is limited. The ventilation concept is optimized for mini-mum noise emission. Cold air is drawn in from the front and sides and heated air is blown out to the rear. This concept contributes to an optimal working environment in the lab and simplifies integration into 19" racks in production areas.Expandable for future requirementsThanks to its flexible and customizable design, theR&S®SMCV100B is ideally prepared to meet future require-ments. Options can easily be added via software key-codes, allowing users to quickly expand the I/Q modula-tion bandwidth, RF output power and RF frequency range of the R&S®SMCV100B or add standards.Modern RF signal generation with direct digital RFupconversion conceptThe R&S®SMCV100B vector signal generator features a new direct RF DAC concept for RF signal generation. This concept enables I/Q modulation and upconversion in the digital domain, which eliminates I and Q imbalance e rrors and LO leakage as known from traditional analog I/Q modulators.Wide range of applications►Research and education: use in labs at universities,schools, etc.►Wide base market: use as general purpose instrument in labs►Wireless market: signal generator for cellular signals, such as 5G, LTE and IoT , and non-cellular signals, such as Wi-Fi, in line with the different versions of IEEE 802.11, Bluetooth® and other standards►Broadcast consumer equipment market: production and testing of broadcast receivers, set-top boxes, TV receivers, etc.►Automotive market: production, end-of-line testing of car radios, entertainment and navigation systems, etc. ►Electronics manufacturing services: production of products with constantly varying user requirementsThe Bluetooth® word mark and logos are registered trademarks owned by B luetooth SIG, Inc. and any use of such marks by Rohde & Schwarz is under license.Rohde & Schwarz R&S®SMCV100B Vector Signal Generator 5REAR PANEL CONNECTIONSDigital visual interface (DVI-D)External monitor interfaceReference inputFor external clock sourceReference outputFor synchronizing external instrumentsMultifunctional interface►Input for 1 PPS►Output for markersUSB 3.0 interfacesPC data and streaming interfaces for waveform streamingQSFP+ slots with 10BASE-TFor electrical i nterfaces ( p repared for optical interfaces)IP streaming interfaceFor external IP streaming to broadcast real-time codersEthernet (LAN)For remote access and remote controlMultifunctional interface►Input for ASI, ETI, TS, trigger, SPDIF►Output for markersSustainable product design►Environmental compatibility and eco-footprint ►Energy efficiency and low emissions►Longevity and optimized total cost of ownershipCertified Environmental ManagementISO 14001Certified Quality Management ISO 9001Rohde & SchwarzThe Rohde & Schwarz electronics group offers innovative solutions in the following business fields: test and mea-surement, broadcast and media, secure communications, cybersecurity, monitoring and network testing. 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电视转播车系统配置简述作者：刘春根来源：《声屏世界》2011年第01期为了全面提升节目制作能力和节目制作质量，满足电视节目制作对硬件设施的需求，吉安电视台购置了一辆六讯道标清数字电视转播车。

该车的系统设计最大限度地考虑了安全问题，采取多级备份措施，避免出现单一崩溃点；充分考虑了系统配置的全面性和合理性，使得整车功能齐全，使用方便，并利于系统维护。

车体及其布局基于整车承载要求和既经济又安全的条件，我们选用了重庆五十铃FVR34P2车型底盘作为整车承载基础。

经改装后，整车为钢骨架铝蒙皮直挂式厢体结构，车体外廓长9.8m、高3.85m、宽2.5m。

车内装饰遵循“防火、防静电、防污染”的原则，采用环保材料。

下围裙箱采用钢骨架钢板焊接结构，用于安装供电设备和放置系统附属设备。

车内布局采用各区间不隔断式设计（如示意图所示）。

整车分为导播区（含音频区、字幕）、技术区（含录像区）、检修区和后仓。

导播区工作台装有滑轨可前后移动，在工作时将工作台往外拉，可扩展导播区工作人员与监视墙的视觉距离。

技术区设备机架前设有工作台，设备机架后留有检修区。

主工作门外设有手动侧拉工作平台。

后仓主要安装三同轴电缆盘、电源电缆盘、综合电缆盘和外接口板。

值得一提的是，因车内空间有限，我们充分利用导播区工作台下的空间安装了机柜，机柜内安装了6个带滑轨的抽屉，每个抽屉内装有固定的摄像机拖板，将摄像机固定于拖板上，既不影响导播台的使用，又解决了摄像机的放置问题。

为了给整车设备提供良好的用电环境，本车的外接交流供电可采用380V电或220V电，通过车上控制开关进行转换，以适应不同环境下的外电接入。

为了提高电源的抗干扰能力，车上装有一台交流隔离变压器，将外接380V电转变为双路220V电为整车供电。

为保证设备供电安全，车上采用了UPS电源和稳压电源双电源供电。

车上所有双电源设备由UPS电源和稳压电源同时供电，车上其他单电源设备仅由UPS电源供电，且UPS电源和稳压电源都设有旁路转换开关，一旦工作异常，可将其旁路直接供电。

8843机心电路原理分析与检修8843机心是由超级单片集成电路TDA8843与微处理器WH2000组合构成的海尔彩电系列机心，由此系列机心派生出的彩电有RGBTV-29FA、HP-2999、29F18、HP-2590、25F08、25F99等型号，主要特点是具有拉幕式开关机和I2C总线控制系统，可接收218个频道，具有童锁和操作帮助功能。

根据不同的机型，分别加有超重低音电路、扫描速度调制电路以及图象增强等功能，是目前较先进的机芯之一。

本文介绍该机芯的电路原理分析与常见典型故障检修。

一．TDA8843机心的电路组成框图、主要集成电路及信号流程图1．TDA8843机心的电路组成框图如图一所示，主要由下列电路组成：（1）微处理器控制电路：由微处理器N901、存储器N902及外围元件等组成。

（2）小信号处理电路：由调谐器A101、预中放HC101、声表面波滤波器SF101、单片处理集成电路N201、图象增强芯片N1005、梳状滤波器N1004、视频转换开关N202等组成。

（3）伴音音效处理、伴音功放及重低音功放电路：由伴音音效处理集成电路N701、伴音功放N601、重低音低通放大N1201、重低音功放N1202、N1203等组成。

（4）行、场扫描电路：由场扫描输出集成电路N301、行输出管V403、行输出变压器T444等组成。

（5）视频放大电路：由视频放大集成电路N501及外围元件组成。

（6）开关电源电路：由整流桥堆D802、电源厚膜块N801、开关变压器T801、可关断稳压器N804以及精密基准源DZ805等组成。

2．主要集成电路简介：（1）微处理器WH2000（2）超级单片处理芯片TDA8843（3）存储器CAT24C08P（4）梳状滤波器SAA4961（5）图象增强芯片TDA9178（6）伴音音效处理芯片TDA9860（7）伴音功放TDA7297（8）重低音运放BA4558N（9）重低音功放TDA2030（10）视频放大TDA6108JF（11）场扫描输出TDA8351Q（12）电源厚膜KA3S0680（13）可关断稳压器KA76303．8843机心信号流程图8843机心信号流程图如图二所示。

广电专用数字电视信号在线监测设备的设计常州创恒数据系统有限公司周春摘要本文介绍了广电专用数字电视信号在线监测设备的设计方案。

本方案采用了基于TDA10024芯片的数字调谐模块和高性能单片机STC12C5410，可实时、准确地对广电数字电视信号的各种参数（误码率（BER）、调制误差率（MER）、载噪比（C/N）、信号电平等）进行监测，监测结果可通过光纤线路传输到控制中心，让运维人员足不出户，及时了解分布在全市的光节点数字电视信号的参数状态，及时解决故障。

关键词数字电视信号在线监测，TDA10024，MER，信号电平引言在三网融合、网络技术飞速发展的今天，光进铜退，宽带化，双向化，新一代广电基础网改造迅速推进，数字电视，因特网接入，企业专线，VOIP……增值业务蓬勃发展，广电，正在向电信级运营商大步迈进。

如何从传统的国企转变为真正的电信级运营商，面向市场，面向客户，面向服务是广电的唯一选择。

在目前情况下，广电基础网和业务网建设都有了长足进步，目前急需大力推动支撑网建设，建立强大高效的网管系统，是广电网络提高竞争力的基础所在。

但是，客观的审视一下广电网络的现状，我们不禁大吃一惊。

和广电网络的传统规划有关，广电网一直以单向传输逐级分配为发展模式，中心播出设备向下一级设备发送节目信息，而下级设备是否工作正常却一无所知。

传统的运维都需要等到客户进行投诉以后，运维人员才被动的赶赴现场进行排查，显然有很长的滞后时间，客户意见很大。

更为严重的是，有部分地区，某些法轮功分子，在小区的光节点上，撬开设备箱体，将反动节目直接插入小区总节点，造成恶劣的社会影响。

本文介绍的广电专用数字电视信号在线监测设备，很好地解决了上述问题，它实时、准确地对光节点上的数字电视信号的各种参数（误码率（BER）、调制误差率（MER）、信号电平等）进行监测，并通过光纤线路将监测结果传输到控制中心，让运维人员足不出户，及时了解分布在全市的光节点数字电视信号的参数状态，及时解决故障。