During the past decade, cable television (CATV) systems have evolved from one-way broadcast of analog video transmission to two-way hybrid fiber/coaxial (HFC) networks delivering both analog and broadband services. The broadband services include high speed internet access, cable telephony, video-on-demand, and digital video. In this talk, we describe HFC transmission systems including the infra...

Broadband access technologies of DSL and Cable Modem (CM) are now widely deployed by competing telecom and cable TV network operators respectively. Fiber-based FTTP (FTTH, FTTB, etc.) will be the ultimate access solutions. This paper will examine the broadband access network evolution options for FTTP over cable TV’s HFC networks and discuss its competitiveness when compared with telecom networ...

Data-Over-Cable Service Interface Specification (DOCSIS) is one of the many last mile technologies intended to provide Internet access and packet-based services to the customer. DOCSIS uses the widely deployed hybrid fiber/coax (HFC) network as the physical link between multiple cable modems (CMs) and the cable modem termination system (CMTS). This paper presents the upstream performance of DOC...

Many cable operators have begun the process of upgrading their cable systems in anticipation of delivering a wide range of interactive digital services to the home. These newer hybrid fiber-coaxial (HFC) networks can take advantage of unused bandwidth in broadcast cable television (CATV) and allow for an inexpensive and simple way for home users to have access to many broadband digital applicat...

We have characteri~ed a number of recently developed fiber optic components that hold the promise of unprecedented stability for pas~ively etabilired fkequency distribution l i s . These components include a fiber optic transmitter, an optical isolator and a new type of flber optic cable. A novel laser transmitter exhibits wtremely low sendtivity to intensity and polarixation changes of rdected...

This paper reviews the new field of geo-measurement with metallic cable time domain reflectometry (TDR) for surveillance of transportation facilities. TDR is radar in a coaxial cable, and is especially advantageous for remote monitoring because of its inherently digital nature. Advances can be separated into those that leverage use of long cables as transducers“along” technology and those that ...

Data-Over-Cable Service Interface Specifications v1.1 (DOCSIS v1.1), developed for data transmissions over Hybrid Fiber Coaxial (HFC) networks, defines five upstream services for supporting per-flow Quality of Services (QoS). The cable modem termination system (CMTS) must periodically grant upstream transmission opportunities to the QoS flows based on their QoS parameters. However, packets may ...

Although the AES/EBU digital audio standard has already been adapted to optical, twisted pair [1] and coaxial cables [2]. This paper explores cabling options for new and emerging applications of digital audio communications. Enabling features include remotely powering devices over the audio cable and bi-directional communications. Remote power benefits both ends of the audio reproduction chain:...

Simple broadband microwave interconnects are needed for increasing the size of focal plane heterodyne radiometer arrays. We have measured loss and crosstalk for arrays of microstrip transmission lines in flex circuit technology at 297 and 77 K, finding good performance to at least 20 GHz. The dielectric constant of Kapton substrates changes very little from 297 to 77 K, and the electrical loss ...