The CUNY Committee on Academic Technology, is comprised of 48 members representing 25 campuses across CUNY. The 18 members of the ePortfolio subcommittee are drawn from this body. The cross-campus representation and communication provides subcommittee members with an unusually rich vista of the diversity of ePortfolio plans and strategies across CUNY. A collectively authored and actively wiki on the CUNY Academic Commons -- an aggregated and integrated community ePortfolio - communicates information to all interested parties across CUNY. Among the information Available information includes a systematic comparison of campus eportfolio projects, and on the piloting and implementation of eportfolio projects. The wiki also showcases through live links to best practices, platforms, faculty development and other dimensions of implementation projects.
The cross-campus and collaborative nature of the eportfolio subcommittee wiki has facilitated our evolution into a venue for identifying, analyzing and addressing "universal concerns" within the body politic of the university. Most recently the committee successfully impacted recommended changes to the language of the CUNY IT Strategic Plan to preserve a commitment to flexibility. The new language, subsequently incorporated into the plan, reads as follows: "Since many campuses are in the process of implementing, piloting or considering eportfolios, and since CUNY experience and over a decade of research indicates that eportfolio solutions must be tailored to meet the specific needs of specific campuses, programs, and students, we will work to support flexible and independent campus-based solutions, while striving to also promote interoperability and shared standards, and to leverage economies and efficiencies of scale where possible."
Our presentation takes this achievement in communication and its language as the starting point. The individual speakers will outline key features that distinguish specific campus eportfolio programs and then lead a discussion among the participants on how this applies in the wider context of eportfolio programs.
The Friedman Foundation For Educational Choice seeks to build momentum for school choice through various programs and services. It aims to create a positive atmosphere for choice by highlighting the benefits of choice such as better test scores, higher graduation rates, increased parent satisfaction, and savings for taxpayers. The Foundation provides services like readiness assessments, leadership development, and preliminary planning assistance. It is led by CEO Robert C. Enlow and promotes choice through legislative efforts like tax credit and voucher bills in various states.
The document summarizes "The Wise Way ... Paradoxical Commandments" which provides advice on how to behave even when facing unreasonable, illogical, or self-centered people. The commands suggest to forgive people anyway, be kind anyway, and succeed anyway despite potential accusations or jealousy from others. It also advises to continue doing good deeds and giving your best efforts to the world regardless of whether your actions are recognized or appreciated.
The document discusses hierarchical database models and concepts including:
- Records are organized into a tree structure with parent-child relationships
- Queries can retrieve records by traversing the tree structure using pointers
- The IMS database system was an early commercial hierarchical database that used various access methods like HSAM and HISAM
This document discusses the emerging interest in sociology to analyze material objects as active agents in social dynamics, rather than just as passive objects used by human subjects. It outlines how objects were traditionally viewed in sociology and the human sciences as merely products of human labor or symbols used by humans. More recently, some sociologists have begun to ask how non-human objects can influence and determine social phenomena. This book aims to contribute to that discussion by conceptualizing the "biography" or life trajectory of objects, arguing that analyzing objects this way can reveal obscure aspects of social life. It explores what analyzing the biographies of objects as social subjects might mean for sociological explanations of society.
Taz breaks up with his girlfriend Dagmar because he is still not over his ex Aerith. Liz moves in with Asher and his family because she is pregnant and overwhelmed by financial and marital issues with her husband Zeph. Sydney is going through an emotional crisis and withdraws from her friend Houston and drops out of an upcoming music competition.
The CUNY Committee on Academic Technology, is comprised of 48 members representing 25 campuses across CUNY. The 18 members of the ePortfolio subcommittee are drawn from this body. The cross-campus representation and communication provides subcommittee members with an unusually rich vista of the diversity of ePortfolio plans and strategies across CUNY. A collectively authored and actively wiki on the CUNY Academic Commons -- an aggregated and integrated community ePortfolio - communicates information to all interested parties across CUNY. Among the information Available information includes a systematic comparison of campus eportfolio projects, and on the piloting and implementation of eportfolio projects. The wiki also showcases through live links to best practices, platforms, faculty development and other dimensions of implementation projects.
The cross-campus and collaborative nature of the eportfolio subcommittee wiki has facilitated our evolution into a venue for identifying, analyzing and addressing "universal concerns" within the body politic of the university. Most recently the committee successfully impacted recommended changes to the language of the CUNY IT Strategic Plan to preserve a commitment to flexibility. The new language, subsequently incorporated into the plan, reads as follows: "Since many campuses are in the process of implementing, piloting or considering eportfolios, and since CUNY experience and over a decade of research indicates that eportfolio solutions must be tailored to meet the specific needs of specific campuses, programs, and students, we will work to support flexible and independent campus-based solutions, while striving to also promote interoperability and shared standards, and to leverage economies and efficiencies of scale where possible."
Our presentation takes this achievement in communication and its language as the starting point. The individual speakers will outline key features that distinguish specific campus eportfolio programs and then lead a discussion among the participants on how this applies in the wider context of eportfolio programs.
The Friedman Foundation For Educational Choice seeks to build momentum for school choice through various programs and services. It aims to create a positive atmosphere for choice by highlighting the benefits of choice such as better test scores, higher graduation rates, increased parent satisfaction, and savings for taxpayers. The Foundation provides services like readiness assessments, leadership development, and preliminary planning assistance. It is led by CEO Robert C. Enlow and promotes choice through legislative efforts like tax credit and voucher bills in various states.
The document summarizes "The Wise Way ... Paradoxical Commandments" which provides advice on how to behave even when facing unreasonable, illogical, or self-centered people. The commands suggest to forgive people anyway, be kind anyway, and succeed anyway despite potential accusations or jealousy from others. It also advises to continue doing good deeds and giving your best efforts to the world regardless of whether your actions are recognized or appreciated.
The document discusses hierarchical database models and concepts including:
- Records are organized into a tree structure with parent-child relationships
- Queries can retrieve records by traversing the tree structure using pointers
- The IMS database system was an early commercial hierarchical database that used various access methods like HSAM and HISAM
This document discusses the emerging interest in sociology to analyze material objects as active agents in social dynamics, rather than just as passive objects used by human subjects. It outlines how objects were traditionally viewed in sociology and the human sciences as merely products of human labor or symbols used by humans. More recently, some sociologists have begun to ask how non-human objects can influence and determine social phenomena. This book aims to contribute to that discussion by conceptualizing the "biography" or life trajectory of objects, arguing that analyzing objects this way can reveal obscure aspects of social life. It explores what analyzing the biographies of objects as social subjects might mean for sociological explanations of society.
Taz breaks up with his girlfriend Dagmar because he is still not over his ex Aerith. Liz moves in with Asher and his family because she is pregnant and overwhelmed by financial and marital issues with her husband Zeph. Sydney is going through an emotional crisis and withdraws from her friend Houston and drops out of an upcoming music competition.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise boosts blood flow, releases endorphins, and promotes changes in the brain which help regulate emotions and stress levels.
South Korea has extensive internet filtering policies in place to restrict access to political content related to North Korea, gambling sites, pirated software, and pornography. The National Security Law is the primary regulation governing internet speech and aims to prevent communist ideology and pro-North Korean sentiment. Internet service providers are responsible for policing their networks and filtering a government list of over 120,000 banned sites. While testing found little blocking of sensitive content overall, minors' access is restricted by age verification requirements on adult sites.
Belgium has a federal government that retains powers over foreign affairs, defense, justice, finance, and social security. Regional governments have autonomy over areas like education and culture. The country also has 11 provinces that exercise independent authority over social and cultural infrastructure initiatives.
This document is a test report for the Venus motor from PT. Subur Semesta. The motor is designed for use with large satellite dishes and was tested on Venus dish. It has a sturdy construction to withstand windy conditions. The motor connects to the Venus Millennium II-EP receiver via a 4-wire cable and can power the drive arm for positioning the dish. The gear and belt system allows reliable rotation of large dishes.
The Omega Legacy Chapter 3 - I wanna be a RockStar!Rubber Ducky
This chapter introduces several new additions to the Omega family:
- Benjamin and Felicity get married and have their first child, Corbin.
- Andy gives birth to Billy's son, Connor.
- Felicity gives birth to twins Calvin and Cody after having cheesecake, which leads to more children than planned.
- Artie becomes the Education Minister, achieving his lifetime want. The family continues to grow as the legacy progresses to the next generation.
The document provides sample interview questions for a first job interview. It lists common questions asked under the following categories: education, career goals, self-assessment, creativity, decisiveness, range of interests, motivation, work standards. Some examples of questions include: "How has your education prepared you for this position?", "What are your strengths and weaknesses?", "Describe a conflict you were involved in and how it was resolved", and "What motivates you in your work?". The document aims to help job applicants prepare answers to common questions asked in entry-level job interviews.
This document provides an overview of batch processing in OCLC and outlines the basic workflow. It defines common types of batch processing projects like reclamation, retrospective conversion, and ongoing batchloading. The workflow involves ordering a project, submitting data files, pre-processing and matching records at OCLC, and receiving output reports and records. Output options include cross reference reports, records with OCLC numbers merged, and full OCLC-MARC records. Documentation and support resources are also listed.
The document summarizes the opening session of the Singapore Mini Maker Faire 2014, which featured 17 makers who each gave a 3 minute presentation. The makers represented a wide range of areas including design, sustainability, electronics, 3D printing, crafts, robotics, and more. Each summary included the maker's name, background, and the topic of their presentation. The goal was to showcase the diversity of projects and introduce attendees to the breadth of the maker community in a short, high-energy format.
This family photo shows Brad, Amber, Ashton, and Brody together. A boy finds companionship with his dog as they are best friends. Their backyard and trips to the cottage allow for fun, family time, exploring nature, and relaxation.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise boosts blood flow, releases endorphins, and promotes changes in the brain which help regulate emotions and stress levels.
South Korea has extensive internet filtering policies in place to restrict access to political content related to North Korea, gambling sites, pirated software, and pornography. The National Security Law is the primary regulation governing internet speech and aims to prevent communist ideology and pro-North Korean sentiment. Internet service providers are responsible for policing their networks and filtering a government list of over 120,000 banned sites. While testing found little blocking of sensitive content overall, minors' access is restricted by age verification requirements on adult sites.
Belgium has a federal government that retains powers over foreign affairs, defense, justice, finance, and social security. Regional governments have autonomy over areas like education and culture. The country also has 11 provinces that exercise independent authority over social and cultural infrastructure initiatives.
This document is a test report for the Venus motor from PT. Subur Semesta. The motor is designed for use with large satellite dishes and was tested on Venus dish. It has a sturdy construction to withstand windy conditions. The motor connects to the Venus Millennium II-EP receiver via a 4-wire cable and can power the drive arm for positioning the dish. The gear and belt system allows reliable rotation of large dishes.
The Omega Legacy Chapter 3 - I wanna be a RockStar!Rubber Ducky
This chapter introduces several new additions to the Omega family:
- Benjamin and Felicity get married and have their first child, Corbin.
- Andy gives birth to Billy's son, Connor.
- Felicity gives birth to twins Calvin and Cody after having cheesecake, which leads to more children than planned.
- Artie becomes the Education Minister, achieving his lifetime want. The family continues to grow as the legacy progresses to the next generation.
The document provides sample interview questions for a first job interview. It lists common questions asked under the following categories: education, career goals, self-assessment, creativity, decisiveness, range of interests, motivation, work standards. Some examples of questions include: "How has your education prepared you for this position?", "What are your strengths and weaknesses?", "Describe a conflict you were involved in and how it was resolved", and "What motivates you in your work?". The document aims to help job applicants prepare answers to common questions asked in entry-level job interviews.
This document provides an overview of batch processing in OCLC and outlines the basic workflow. It defines common types of batch processing projects like reclamation, retrospective conversion, and ongoing batchloading. The workflow involves ordering a project, submitting data files, pre-processing and matching records at OCLC, and receiving output reports and records. Output options include cross reference reports, records with OCLC numbers merged, and full OCLC-MARC records. Documentation and support resources are also listed.
The document summarizes the opening session of the Singapore Mini Maker Faire 2014, which featured 17 makers who each gave a 3 minute presentation. The makers represented a wide range of areas including design, sustainability, electronics, 3D printing, crafts, robotics, and more. Each summary included the maker's name, background, and the topic of their presentation. The goal was to showcase the diversity of projects and introduce attendees to the breadth of the maker community in a short, high-energy format.
This family photo shows Brad, Amber, Ashton, and Brody together. A boy finds companionship with his dog as they are best friends. Their backyard and trips to the cottage allow for fun, family time, exploring nature, and relaxation.
This document appears to be a magazine or journal focused on digital television technology. It contains several articles and reports on various digital TV products and companies, including reports on IPTV receivers, satellite receivers, signal analyzers, and network equipment. It also includes company profiles, news briefs, and listings of upcoming industry events and trade shows. The publication seems aimed at industry professionals working in digital television globally.
The document discusses high-frequency filters produced by MFC. It provides details on the types of filters MFC produces, their uses, and benefits. Key points:
- MFC specializes in filters between 5 Hz and 50 GHz for applications like satellite reception systems, cable headends, and satellite uplinks.
- Their filters are particularly useful for eliminating interference in crowded frequency bands like the C-band. Filters allow specific frequency ranges to pass while blocking others.
- The document outlines different filter types (low-pass, high-pass, band-pass, band-reject) and how they work to filter out unwanted signals above or below cutoff frequencies.
The document provides an overview and review of the Icecrypt S3700CHD triple tuner PVR receiver. It has an elegant front panel with a VFD display and card readers. The back panel features three tuner inputs, USB, HDMI, and network ports. The remote is well-designed and the manual is available in multiple languages. The initial setup guide assists with configuration. It supports 1080p video output and all DiSEqC protocols. Channel searches found over 1500 TV and 300 radio channels on HOTBIRD. The software provides a user-friendly interface for navigation, settings, and multimedia features. Overall, the receiver offers excellent hardware and sophisticated yet easy-to-use software.
GlobalInvacom is a UK-based fiber optic manufacturer that developed FiberIRS, a technology for distributing satellite signals via fiber optic cables. Since its introduction 5 years ago, FiberIRS has connected over 2 million households. GlobalInvacom continues improving FiberIRS, allowing it to now support up to 4,096 connections from a single satellite dish. The company has grown significantly, with 1,600 employees working across multiple offices and 14 engineers dedicated to further developing FiberIRS. GlobalInvacom is working on new products to transmit more signal types over fiber optic networks and make installation easier.
1. The document describes how to set up an IPTV system using a Raspberry Pi device as the receiver. A PC is used as the server with TSReader Pro to receive broadcast signals and stream channels over the network.
2. Key steps include downloading the OpenELEC operating system onto an SD card for the Raspberry Pi, adding MPEG2 license keys, and configuring TSReader Pro on the server PC to demux channels and stream them individually over the network to be received by the Raspberry Pi.
3. The Raspberry Pi converts any TV into a networked media center using XBMC. Being small and inexpensive, it can be easily hidden behind a TV and controlled remotely with a wireless keyboard
The document discusses proposed extensions to the DVB-S2 digital video broadcasting standard over satellites. The extensions aim to improve spectrum efficiency and allow for higher data rates. Key points include:
1) Reducing roll-off factors and side lobes of carriers allows transponders to be placed closer together, utilizing bandwidth.
2) Using wider bandwidth transponders that are 3 times the size of typical ones further increases efficiency.
3) A new 64-APSK modulation scheme and additional coding options provide more flexibility to optimize throughput.
4) Overall, the extensions could provide up to 20% higher data rates for broadcasting and 64% for professional services.
ELNET is a digital TV wholesaler and retailer located in Iceland that offers a wide range of digital TV products from small DVB meters to large DVB transmitters. As the Icelandic market is small with only 300,000 people spread across a large geographic area, ELNET aims to provide as wide a product selection as possible. ELNET has been in business since 1982 and is a distributor for Rohde & Schwarz equipment, supplying around half of Iceland's digital TV transmitters. While satellite dishes remain popular sellers, ELNET expects fiber optic distribution systems to grow in popularity in the coming years as their price difference with coaxial systems decreases.
The document tests a Deviser S7000 multi-norm digital TV signal analyzer. In part 1, the analyzer's functions are introduced, including its high resolution display, real-time spectrum analysis, and remote control capabilities. Part 2 details testing done by TELE-audiovision, finding the S7000's measurement precision to be very similar to five reference analyzers. Alignment of a motorized antenna using the S7000's waterfall diagrams is described as extremely easy. Troubleshooting interference in a CATV system is also demonstrated.
- Marcos Benni has set up a new office in Jundiai, Brazil to expand his digital TV forum BSD and start a new online store selling digital TV products.
- The store, bsdshop.com.br, will feature short product videos to better demonstrate products and their uses. It will sell items like satellite dishes, LNBs, cables, and receivers.
- Benni has installed multiple satellite dishes in his office to receive channels for his forum and keep visitors informed. He also demonstrates IPTV and plans to restart an internet radio station.
- BSD forum receives around 400,000 monthly visitors, mainly from Brazil, making it one of the largest digital TV
The Amiko Mini HD is a compact DVB-S2 HDTV receiver measuring only 15 x 11 x 3.5 cm and weighing 250g. It has a full set of features including HDMI output, PVR recording, an integrated EPG and network functions. The receiver supports DiSEqC, has an automatic mode to adapt to the TV resolution, and can scan satellites and transponders. Its compact size allows it to be hidden while still providing full HDTV and recording capabilities.
The AB IPBox Prismcube Ruby is a new HDTV PVR satellite receiver with a media center built around the Xbox Media Center operating system. It has a modern, elegant design and is well-equipped with features like two satellite inputs, HDMI, USB, and network connectivity. The initial installation guide walks the user through setup, including customizing video output settings, setting up diverse antenna configurations via DiSEqC protocols, scanning over 100 pre-programmed satellites, and setting the time signal from user-selected channels. The receiver supports recording functionality and an extensive EPG for navigating live and recorded content.
The Handheld Satcom Test Source by WORK Microwave is a portable test signal generator designed for precise high-frequency measurements. It can generate signals from 50-180 MHz and 950-2150 MHz with adjustable power levels. The generator has two independent synthesizers allowing it to output two signals simultaneously for measuring intermodulation in high-frequency converters. Its portability and integrated rechargeable battery make it a versatile tool for testing satellite transmission equipment.
This issue of TELE-audiovision magazine includes reviews of various digital TV products such as signal analyzers and satellite receivers. It also features articles on emerging technologies like ultra high definition television and self-made IPTV systems. The magazine provides company profiles of digital TV wholesaler ÖREIND in Iceland, satellite receiver manufacturer CHANGHONG in China, and satellite uplink provider SPEEDCAST in Brazil. TELE-audiovision has been the world's largest digital TV trade magazine since 1981.
Speedcast is a large satellite TV uplink operator located in Barueri, Brazil. It began uplinking HDTV signals in 2008, making it the first company to do so in Brazil. Speedcast operates seven large uplink dishes and has over 30 employees. It provides uplink services to several major Brazilian TV channels and also has its own small studio for producing business television programs. Speedcast has established itself as one of the leading satellite TV uplink providers in Brazil over the past 10 years.
Öreind is a two-person electronics repair and installation business located in Iceland that is celebrating its 25th anniversary. It specializes in repairing home electronics devices, installing satellite dishes and antennas, and providing components for satellite, terrestrial, and internet protocol television (IPTV). While satellite installation was a major source of business in the past, the company sees IPTV as key to its future success as digital television delivery evolves. Öreind aims to support all television distribution methods in Iceland from its full warehouse of equipment and expertise in installations.
The document provides a test report of the MKTech IS1-19HD hybrid satellite and terrestrial PVR receiver. It has inputs for both DVB-S2 satellite signals and ISDB-T terrestrial channels, making it well-suited for the South American market. The receiver performed well in tests, with fast channel changing, excellent signal sensitivity, and the ability to scan and record multiple channels simultaneously. It also features a removable hard drive bay, wireless connectivity, online functions, and robust PVR and media playback capabilities. In conclusion, the IS1-19HD is recommended for its thoughtful software and rich yet easy-to-use functions.
The document tests and reviews the Horizon HD-CM+ digital TV signal meter for DVB-C networks. It found the meter to be extremely easy to operate, with a clear LCD display and intuitive menu navigation. The meter measures signal levels, modulation error ratio, and bit error rate on digital channels accurately compared to a reference meter. It also features functions useful for professionals such as leakage testing, spectrum analysis, and storing measurement logs. The review concludes the HD-CM+ is an excellent signal meter for installers thanks to its usability, performance and inclusion of tools needed for professional work.
1. TEST REPORT نظام التوزيع البصري
SPAUNسباون
SOTx1310607 NF &
SORx1310607 NF SPAUN SOTx131
SORx1310607 NF
12-01/201
0607 NF &
1
حل بسيط لاللياف البصرية في
Connect endles
s satellite and ter
rec eivers to one restrial
single rec eption
Ideally suited for point.
large apartment
blocks.
توزيع اشارة االقمار الصناعية
يجب ان ياخذ كل فني تركيب اقمار صناعية
بعين االعتبار عامل اضعاف االشارة الذي
تتسبب به محوالت االشارة و الكوابل المحورية
في االنظمة الكبيرة لتوزيع تلفزيون االقمار
الصناعية . يمكن ان يفكر القراء ذوي الخبرة
القليلة انه يمكن تعويض ذلك عن طريق
استخدام مكبرات اشارة اضافية في مسار االشارة
. تساعد هذه الطريقة الى حد معين ، يمكننا
بذلك الحفاظ على مستوى معقول لالشارة و لكن
.ال يمكن ان نمنع تدهور نوعية االشارة
0.35
TELE-satellite World www.TELE-satellite.com/...
Download this report in other languages from the Internet:
Arabic العربية www.TELE-satellite.com/TELE-satellite-1101/ara/spaun-optical.pdf
Indonesian Indonesia www.TELE-satellite.com/TELE-satellite-1101/bid/spaun-optical.pdf
Czech Česky www.TELE-satellite.com/TELE-satellite-1101/ces/spaun-optical.pdf
German Deutsch www.TELE-satellite.com/TELE-satellite-1101/deu/spaun-optical.pdf
English English www.TELE-satellite.com/TELE-satellite-1101/eng/spaun-optical.pdf
Spanish Español www.TELE-satellite.com/TELE-satellite-1101/esp/spaun-optical.pdf
Farsi فارس ي www.TELE-satellite.com/TELE-satellite-1101/far/spaun-optical.pdf
French Français www.TELE-satellite.com/TELE-satellite-1101/fra/spaun-optical.pdf
0.37
Hebrew עברית www.TELE-satellite.com/TELE-satellite-1101/heb/spaun-optical.pdf
Mandarin 中文 www.TELE-satellite.com/TELE-satellite-1101/man/spaun-optical.pdf
Dutch Nederlands www.TELE-satellite.com/TELE-satellite-1101/ned/spaun-optical.pdf
Polish Polski www.TELE-satellite.com/TELE-satellite-1101/pol/spaun-optical.pdf
Portuguese Português www.TELE-satellite.com/TELE-satellite-1101/por/spaun-optical.pdf
Romanian Românesc www.TELE-satellite.com/TELE-satellite-1101/rom/spaun-optical.pdf
Russian Русский www.TELE-satellite.com/TELE-satellite-1101/rus/spaun-optical.pdf
Turkish Türkçe www.TELE-satellite.com/TELE-satellite-1101/tur/spaun-optical.pdf
Available online starting from 3 December 2010
60 TELE-satellite — Global Digital TV Magazine — 12-01/201 — www.TELE-satellite.com
1
2. كتل بناء نظام ■
توزيع هجين
محوري بصري
نواتجها االربعة الى ضوء . سباون ،
شركة التصنيع االلمانية المعروفة جدا
، قد ارسلت لنا اخر منتجاتها المصمم
لهذا الهدف اال وهو 706131SOTx
. NFو يطلقون عليه المرسل
البصري .
تحتاج في الطرف االخر لكابل
االلياف الضوئية الى عكس العملية
- العودة مرة اخرى الى االشارة
الكهربائية . اطلقت شركة سباون
على الوحدة التي تقوم بهذه العملية
جهاز االستقبال البصري و اعطته
رقم موديل SORx1310607 NF
. جديد ، ولكن اال يفسد التعديل و
االعادة االضافية نسبة الناقل للضجيج
c/nالخاصة باالشارة ؟ ان هذا من مضمن . يمكن ان يتم عمل هذا اما جدا بنسبة ( 01 - 01 ) حتى في اعلى يكمن الحل الوحيد في الحفاظ على
شأنه ان يدمر كل الفوائد التي تم مباشرة داخل وحدة خفض الضجيج معدالته . نسبة الناقل للضجيج c/nمرتفعة
تقديمها في كابالت االلياف البصرية - انظر الى تقارير اخرى مثل هذا باستخدام خطوط ارسال و محوالت
منخفضة الفقدان . هذا هو بالضبط في مكان اخر في تيلي ستاليت - او بالطبع ، فان الجميع يعرف منخفضة الفقدان . لكن افضل حل
ما اردنا معرفته بقياساتنا . لكن قبل بمساعدة محول خارجي . في الحالة ان هذا ليس تيارا كهربائيا و لكن متوفر اليوم هو استخدام كوابل
االختبار نفسه . القينا نظرة فاحصة الثانية و هى الخاصة بالمحول شعاع ضوئي ينتقل عبر كابل الياف االلياف البصرية . يمكن ان تكون
على الوحدتين . و كما هو الحال مع الخارجي ، فاننا نستخدم وحدة خفض بصرية . لذا فاننا نحتاج الى تحويل نسبة توهين االشارةة هى 2.0 ديسيبل
جميع منتجات سباون ، فان المصنعية ضجيج كواترو او رباعية و نحول اشارة كهربائية الى شعاع ضوء ليزر لكل كيلومتر و معدل خطأ منخفض
ممتازة - ان التسميات الموضوعة
على الغطاء بااللماني و االنجليزي لم
تترك اي مجال للشك حول اين يجب 1 graph
توصيل كل شيئ .
يوجد في الوحدة 7060131SOTx
NFمدخل RFو الذي يمكن ان
نربط به مخرج اقمار صناعية
وحدة او مخرج اقمار صناعية و
اشارة ارضية ، هذا على فرض اننا
قمنا بدمجهم معا مسبقا ( بمساعدة
وحدة دمج ) . يمكن ان يتم هذا الن
المدخل مصمم لنطاق ترددي من
74 حتى 0022 و هذا يغطي نطاق
الترددات االرضية و الفضائية . هناك
ميزة جميلة و هى الضبط المستقل
لمستويات اشارة االقمار الصناعية و
مستوى االشارة االرضية في المدخل :
لقد ادمجت سباون في وحدتها اثنين
62 TELE-satellite — Global Digital TV Magazine — 12-01/201 — www.TELE-satellite.com
1
3. من المخفضات بقدرة 21-0 ديسيبل .
ال يمكن ان تحصل اجهزة االرسال
البصرية على امدادات الطاقة عبر
كابل االلياف البصرية ، لذلك فاننا
نحتاج الى توصيل وحدة تزويد تيار
مستمر بقدرة 91 فولت خارجية .
ترفق سباون واحدامناسبا مع كل وحدة
، SOTx1310607 nfهناك حاجة
للطاقة الكهربائية ليس للوحدة فقط
و لكن لتزويد وحدة خفض الضجيج
المتصلة بها بالكهرباء . بمساعدة
المحول المثبت على غطاء جهاز
االرسال ، فاننا نختار الجهد المناسب
و نختار وجود اشارة 22 كيلو هيرتز
. بفضل ذلك يمكننا استخدام اما وحدة
خفض ضجيج كواترو ( ثم نختار 21
فولت في جميع مسارات االشارة ) او
وحدة خفض ضجيجي رباعية ( ثم
نقوم بضبط كل مسار بشكل مختلف
: ,12V, 18V, 12V/22kHz
. 18V/22kHzاذا كان لدينا مصدر
اشارة ال يحتاج الى طاقة بتيار مستمر
، يمكننا اطفاء المحول تماما .
الوحدة في يوجد
SOTx1310607nfمقبسين من
النوع Fمتصلين على التوازي
المدادات الطاقة . بفضل ذلك يمكننا
اشارات من وحدة خفض ضجيج بالمناسبة فان عملية توصيل مدخالت التغيير الخفيف . يمكننا استخدام هذا توصيل وحدة امداد طاقة واحدة الى
كواترو لألسفل . لحسن الحظ كان و مخرجات بصرية هو حلم كل فني المدخل لمعرفة اذا ما كانت اشارة RF جهاز االرسال االول و توصيل جهاز
من الممكن تصغير جهاز االستقبال تركيب اقمار صناعية .اضغط بلطف موجودة حقا في مدخل جهاز االرسال االرسال الثاني بواسطة قطعة كابل
اكثر بكثير من جهاز االرسال . ان حتى تشعر بنقره و هذا كل شيء . يا له و ما هو مستواها . محوري . بهذه الطريقة فاننا ال
هو جهاز SOTx1310607nf من اختالف جميل بعد موصالت . F نحتاج الى وحدة امداد طاقة مستقلة
استقبال رباعي ، يوجد به اربعة المخرج البصري SC/APC لكل جهاز ارسال : تباع وحدة امداد
مدخالت بصريةو اربعة مخرجات نحتاج الربعة اجهزة ارسال محمي بغطاء اسود يجب رفعه قبل الطاقة PSUمن سباون بمجموعة
RFكهربائية . على العكس من SOTx1310607nfالرسال اربعة ان يتم توصيل كابل الياف بصرية . قوية بما يكفي لتغذية اربعة اجهزة
بث على فرض ان وحدة خفض
الضجيج ال تحتاج لطاقة . لكن اذا
2 graph احتجنا لتغذية وحدة خفض ضجيج
بالطاقة ، و هذه دائما تكون الحالة
، فان العدد ينقص الى ثالثة اجهزة
ارسال و مع ذلك ، فان هذا تسهيل
لعملية التثبيت باكملها .
يوجد في وحدة االرسال البصري
مؤشر ضوئي و الذي اضافه العطاءة
مؤشر على توصيل الطاقة فانه يبلغ
عن وجود ماس في مدخل وحدة خفض
الضجيج . يبدأ بالوميض هذا بديهي
جدا .
يوجد مخرج كهربائي اخروهو
اشارة االختبار و كما هو موضح 02
ديسيبل . ان هذا ببساطة هو المدخل
الموهن بنسبة 02 ديسيبل و هو مدخل
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1 TELE-satellite — Global Digital TV Magazine 36
4. اجهزة االرسال فان اجهزة االستقبال
يتم شحنها بدون وحدة امداد طاقة ،
النه من المفترض ان تحصل على
الطاقة من وحدة التوزيع المركزية او
من محول متعدد مثل اي وحدة خفض
ضجيج عادية يوجد مقبس محوري
يطلق عليه " " cفي جهاز االستقبال
البصري و يعمل لتوصيل الطاقة ،
يفترض هنا على المستخدم توصيل
الكابل المحوري من وحدة مركزية او
محول متعدد .
في حالتنا قمنا بهذا بطريقة
مختلفة ، حيث ان جهاز االستقبال
البصري يحتاج نفس جهد التيار
المستمر الذي يحتاجه جهاز االرسال
. فقد اخذنا وحدة امداد طاقة من
مجموعةجهاز االرسال . ان الوحدة
متعددة االستخدام : ليس فقط انها تقدم
امدادات تيار كهربائي وا سعة النطاق
(001...)240V AC / 47...63 Hz
و لكن تقوم سباون بارسال عدد من
المحوالت القابلة للتحويل بحيث
يمكنك استخدامها في اي مكان في
العالم .
3 graph يمكن توصيل وحدة امداد التيار
المستمر الي من مقبسي التوصيل
( )Fو كما هو الحال في جهاز
االرسال فانها متصلة على التوازي .
لذا اذا كانت هناك حاجة لطاقة تيار
مستمر لجهاز مماثل في الجوار ،
فاننا سنستخدم كابل محوري بدال
من استخدام وحدة امدادا طاقة اخرى
. يظهر مؤشر ضوئي اذا ما تم تزويد
الوحدة بالطاقة .
يمكن ان يتم تثبيت جهاز االرسال
و االستقبال على الحائط ببرغيين فقط
. ال يجب تعريضها للهواء الطلق و
لكن يتم استخدامها داخل المنازل .
و مع ذلك فان درجة ح رارة التشغيل
4 graph
الخاصة بهم واسعة جدا: من 02
درجة مئوية حتى 05 درجة مئوية .
الكتيب المرفق مع كل وحدة مطبوع
باالنجليزية و االلمانية و يقدم جميع
المعلومات الالزمة مع امثلة لدوائر
التطبيق .
القياسات
بعد االعتياد على الوحدات ، جاء
الوقت لوضع جميع القطع معا و ان
نرى نوع االداء الذي يقدموه . توصى
سباون بتزويد نظام توزيع االلياف
البصرية باشارة قوية حقا : 08-38
64 TELE-satellite — Global Digital TV Magazine — 12-01/201 — www.TELE-satellite.com
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5. و لكن ماذا عن جودة االشارة ؟ dBµVلمدخل االقمار الصناعية
■ ستيفن يمكن تقييم هذا عن طريق نسبة و 58 لالرضي . القيمة القصوى هى
كوك المدير تعديل الخطأ في المدخل و المخرج 59 . dBµV
الفني للنظام
البصري
. الحظنا تدهور بسيط جدا في جودة
االشارة ( الرسم البياني 3 و الرسم أوضح لنا ستيفن كوك ، المدير
البياني 4 ) و هذا يعتبر ال شي تقريبا الفني لسباون " نظامنا البصري
. ايجب ان يكون لدينا توهين بقيمة مصمم القصى اداء و لذلك فانه
االلياف البصرية ال تسمح بمرور االرسال يمكن توزيعها على 23 كابل 01 او 51 ديسيبل في كابل محوري يتطلب ادخال اشارة قوية "
اشارات الدايسك . لمضاعفة عدد الباف بصرية و تشكل بذلك عمود طويل ، يمكن ان تكون االشارة على
االقمار الصناعيةة المتوفرة للمستخدم فقري قوي و هائل للشبكة . حافة عتبة االستقبال . لكن ماذا عن زودنا وحدة االختبار خاصتنا
النهائي ، ال بد من مضاعفة االلياف االشارات التناظرية االرضية ؟ القوى باشارة واقعية من قمر هوت بيرد
البصرية ( 8 لقمرين صناعيين ، على سبيل المثال ، يمكن ان يكون ناقل ( حسب توصيات سباون ) ببقي قمنا بتوصيل اجهزة االرسال مع
21 لثالث اقمار صناعية و هكذا ) و لدينا جهاز استقبال بصري باربعة كل شي مثاليا 74 مقابل 84 ديسيبل. اجهزة االستقبال بواسطة كوابل الياف
كذلك الحال بالنسبة الجهزة االرسال و مخارج كهربائية على كل طابق من بصرية قصيرة . لذا ، و لمحاكاة
اجهزة االستقبال . بناية سكنية و الذي يمكن بعد ذلك يقوم نظام سباون البصري بنقل الموزعات ( او الكوابل الطويلة جدا
ان يغذي المحول المتعدد التقليدي االشارات المدخلة كما يتم استقبالها . جدا ) . قمنا بادخال موهن بصري
نظام جهاز االرسال البصري و بعد ذلك يتم توزيعها لعدة مئات 01 ديسيبل و في وقت الحق موهن
الجديد من سباون ال يجعل فقط من اجهزة االستقبال الفضائية .عدد تطبيقات 51 ديسيبل و كما ترون في الرسوم
التركيب اسهل و لكن يضمن ان كل المشتركين الذين يمكن الوصول اليه البيانية ( الرسم البياني 1 و الرسم
مستخدم نهائي سيحصل على اشارة بهذه التكنولوجيا الجديدة هو حقا تفتح هذه الوحدات البصرية البياني 2 ) مخرج جهاز االستقبال
قوية و كاملة متوفرة في مقبسه . مثير العجاب . الجديدة من سباون حقبة جديدة في كان فقط 5 ديسيبل او 01 ديسيبل و
حتى لو كان في ابعد زاوية من شبكة شبكات التوزيع التلفزيوني الكبيرة . هو اقل من مدخل النظام معتمدا على
كبيرة . في الوقت نفسه ال بد ان نذكر ان كل اشارة بصرية موجودة في جهاز الموهن الذي استخدمناه .
ENERGY رأي احد الخبراء
DIAGRAM +
مصنعية جيدة جدا
مشاركة طاقة التيار المستمر بين الوحدات
Apparent Power
اداء ممتاز الشارة بث الفيديو الرقمي عبر االقمار
الصناعية و حتى لو كانت دون مستوى االشارة
Jacek Pawlowskiالموصى بها (38-08 (dBµV
اداء جيد جدا الشارة التلفزيون التناظري لمستويات TELE-satellite
Test Center
المدخالت المرتفعة الموصى بها (58 (dBµV Poland
امكانية عمل شبكات توزيع كبيرة حقا
Active Power امكانية ارسال االشارات لمسافات طويلة
-
Mode Apparent Active Factor
Reception 17 W 6W 53.0
—
استهالك الطاقة لجهاز استقبال SORx1310607 NFالبصري يفي بالمواصفات TECHNICAL
DATA
) . )6W
Manufacturer SPAUN Electronic, Singen, Germany
ENERGY Fax 71-3768 – 1377 (0) 94+
DIAGRAM
E-mail info@spaun.de
Model SOTx 1310607 NF & SORx 1310607 NF
Function Optical Transmitter & Optical Receiver
Apparent Power
Frequency range 47 … 2200 MHz
Optical wavelength 1310 nm
Power consumption (6 W )plus LNB power for transmitter
Maximum supply current of the connected 400 mA
LNB
Active Power
)Transmitter output power (optical 6 dBm
Mode Apparent Active Factor
Reception 29 W 11 W 73.0
Transmitter maximum RF input 95 dBµV
Receiver maximum RF output level (100 dBµV )Terr.(, 110 dBµV )SAT
)Receiver input range (optical 0 … -12 dBm
RF and DC voltage connector typ F
استهالك الطاقة لجهاز ارسال SORx1310607 NFالبصري حوالي ( )11wولكن Optical connector type SC/APC
يتم استهالك ( )6wمن قبل جهاز االرسال .يتم استخدام الباقي لتغذية وحدة خفض Operating temperature °-20 C° ... 50 C
الضجيج المتصلة .
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