Light Reading

Time to Focus on Fiber in HFC

Technically Speaking With SCTE
Technically Speaking With SCTE
Technically Speaking With SCTE
4/26/2013
50%
50%
Repost This

In the world of test measurements, much of the cable industry focus has been directed towards the biggest challenges, namely the coaxial side of the HFC network. With the great progress cable has made in this space, it is now time for the industry to zero in on the fiber side of the network. Increasing bandwidth demands are requiring many operators to move to a fiber deep deployment scheme. One popular method is converting to a radio frequency over glass (RFoG) design. RFoG allows operators to replace the coax portion of the HFC network with fiber, resulting in a FTTH network while maintaining the same equipment in hubs and headends. Even though fiber is less susceptible to interference as coax, it still requires an appropriate set of testing procedures, test equipment and a skilled workforce in order to measure performance and maintain uptime, especially considering the higher expectations of today’s customers. Most of the existing testing procedures -- even the SCTE's own Measurement Recommended Practices for Cable Systems -- assume the operator has an HFC design and concentrate on the coax portion of the network. While the optical side is taken into consideration during routine testing, it does not reflect updates in optical testing and equipment. One example of this comes during upstream plant setup or routine adjustment in an HFC design. During this process, the procedures indicate this as an ideal time to test the fiber for amplitude flatness but do not provide the processes or equipment required for such a test. Other concerns, such as driving more bandwidth through RFoG using DWDM, require maintaining extremely tight frequency constraints in order to reduce interference from dispersion that may led to bit errors or optical beat interference (OBI). To monitor this, it is important for field technicians to be familiar with optical test instruments and measurement techniques. One way to ensure the knowledge is available is by updating the industry’s test measurement guidelines. Among the needs being identified by SCTE: determining which optical measures are best suited for testing for metrics, such as fiber phase/group delay, optical return loss, power and signal leakage; educating the industry on the function and use of optical spectrum analyzers, optical power meters, optical time-domain reflectometers, optical loss test sets and other fiber optic tools and equipment; and increased availability of instructional material that can drive adoption of optimal testing practices. Cable literally has set the standard for test and measurement in HFC. With the increased use of RFoG and other FTTH architectures, it is essential that SCTE and the industry ensure that the same level of attention is paid to optical fiber plant. — Travis Murdock, Standards Administrator, the Society of Cable Telecommunications Engineers (SCTE) This is the latest installment of "Technically Speaking with SCTE," a monthly blog of interviews and columns to provide Light Reading Cable readers with timely updates on the SCTE's initiatives and activities.

(0)  | 
Comment  | 
Print  | 
Newest First  |  Oldest First  |  Threaded View
Flash Poll
LRTV Documentaries
Cable Eyes Big Technology Shifts

4|16|14   |   03:02   |   (4) comments


US cable engineers are facing a lot of heavy lifting in the coming years, notes Light Reading Cable/Video Practice Leader Alan Breznick.
LRTV Custom TV
Maximizing Customer Experience & Assuring Service Delivery in an IP World

4|15|14   |   4:57   |   (0) comments


Steven Shalita, VP of Marketing, NetScout Systems, Inc., discusses the challenges cable/MSO operators face in assuring the delivery of new IP-based services. Key points include the value of proactively managing performance, and using rich analytics and operational intelligence to better understand service and usage trends, make smarter business decisions and ...
LRTV Documentaries
Bye-Bye DVD: Consumers Embrace Digital Video

4|10|14   |   04:17   |   (7) comments


Veteran video analyst Colin Dixon, founder and principal analyst of nScreenMedia, says research shows 56% are using digital video already.
LRTV Documentaries
Video: TW Cable Puts Multicast Gateways to the Test

4|8|14   |   04:13   |   (1) comment


Tom Gonder, a chief architect at Time Warner Cable, explains how its trial of multicast gateways is impacting IP-based video plans.
LRTV Custom TV
Managing & Monetizing Big Data in Operator Environments

4|7|14   |     |   (1) comment


At Mobile World Congress, Gigamon's Director of Service Provider Solutions, Andy Huckridge, and Heavy Reading Analyst Sarah Wallace discuss the 'big data' issues facing carriers and operators today.
LRTV Huawei Video Resource Center
Data Center Energy – Build Your Data Center in a Modular Way

4|7|14   |   2:13   |   (0) comments


Dr. Fang Liangzhou, VP Network Energy Product Line, shared his thoughts about the challenges for data centers during CeBIT 2014.
LRTV Huawei Video Resource Center
Agile Network Solution – An Overview of Huawei's Agile Network Solution

4|7|14   |   2:31   |   (0) comments


Ajay Gupta, Director of Product Marketing, Networking Product Line, gives an overview of the Agile Network Solutions during CeBIT 2014.
LRTV Huawei Video Resource Center
Huawei’s eLTE Voice Trunking, Video and Data Applied for Railways

4|7|14   |   1:38   |   (0) comments


Gottfried Winter is the Sales Director at Funkwerk, a German specialist in GSM-r terminals and a long-time partner of Huawei. At CeBIT 2014, Winter talks to Light Reading about this partnership and the integration of enhanced voice trunking, video and data functions.
LRTV Huawei Video Resource Center
LeaseWeb Speaks Highly of Huawei's Datacenter Products

4|7|14   |   1:37   |   (0) comments


Rene Olde Olthof, Operations Director LeaseWeb, talks about the next data center transformation during CeBIT 2014.
LRTV Documentaries
Comcast: Reshaping the Cable Network Architecture

4|3|14   |   07:11   |   (8) comments


Shamim Akhtar, Comcast's architect and senior director of network strategy, explains why the cable company is moving to a more distributed network architecture.
LRTV Custom TV
VMware CEO Pat Gelsinger at Mobile World Congress

4|1|14   |   3:41   |   (0) comments


VMware CEO Pat Gelsinger speaks to Heavy Reading about the value of virtualization spanning from the data center to service provider networks to mobile devices.
LRTV Huawei Video Resource Center
Analysts' Impressions of Huawei SoftCOM at ONS 2014

4|1|14   |   1:11   |   (0) comments


After visiting the Huawei booth at ONS, Lee Doyle of Doyle Research gives his appraisal of Huawei's SoftCOM solution.
Hot Topics
BlackBerry Invests in Healthcare IT Startup
Sarah Reedy, Senior Editor, 4/15/2014
Volvo: AT&T HSPA+ Can Drive My Car
Sarah Reedy, Senior Editor, 4/16/2014
T-Mobile Petitions Operators to Kill Overages
Sarah Reedy, Senior Editor, 4/14/2014
Mobile Apps Susceptible to Heartbleed, Too
Sarah Reedy, Senior Editor, 4/14/2014
WhatsApp Threatens Carrier VoLTE
Sarah Reedy, Senior Editor, 4/18/2014
Like Us on Facebook
Twitter Feed