Recommended methods of measurement on receivers for television broadcast transmissions - part 3 : electrical measurements on multichannel sound television receivers using subcarrier systems 电视广播发射用接收机测量的推荐方法.第3部分:用副载波系统对多频道声音电视接收机的电气测量
Recommended methods of measurement on receivers for television broadcast transmissions - part 3 : electrical measurements on multichannel sound television receivers using subcarrier systems ; amendment 1 电视广播接收机的推荐测量方法.第3部分:副载波系统多声道电视接收机的电测量.补充件1
With the constraint of subcarrier switching path , a subcarrier label assignment strategy in satellite subcarrier switching networks was proposed for unsymmetrical transmission 摘要分析了卫星通信副载波标记交换网络中网络对动态业务条件下非对称业务传输的适应问题，提出了一种副载波标记划分策略与资源分配算法。
It produces the i and q signals , limits their pass bands , uses them to modulate the subcarrier in a quadrature and adds the moduled subcarrier to the luminance y , blanking and synchronizing signal waveform 它首先分离出i信号和q信号，指定了它们的传输频带，并用它们对副载波进行正交调制，然后将调制过的副载波信号叠加到亮度信号y和同步信号波形上。
The combination of cablemodem and hfc is a way to revamp the catv network to a hybrid videodata communications network . however , hfc uses sub - carrier fdm , which requires ad conversion before transmission . in that sense , the transmission quality will be compromised 虽然cablemodem与hfc配合，是将catv网改造成为视频、数据混合通信网的一种可能选择，但hfc采用副载波频分复用方式，必须进行数模转换才能传输，所以传输质量将受到影响。
It is based on the platform of hardware of fpga , dsp , d / a to realize the concise and full - function digital variable bit rate test signal resource . this paper discuss the ways of full digital if and realize it , certainly the ways to realize the carrier frequency , sub - carrier frequency and variable bit rates with dds technology is also presented 本课题是以fpga 、 dsp 、 d / a为硬件平台，设计实现了结构简明，功能完整的全数字可变速率测试信号源，讨论并实现了中频频段如何实现全数字的方法以及用dds技术实现载波频率，副载波频率，码速率的方法。
