GSM , RF & DTTempus TelcosysThis document provides an overview of telecom concepts and GSM technology. It discusses early analog cellular systems, the development of GSM standards to address limitations in analog networks, and key aspects of GSM including frequency reuse, handovers, and network architecture. The document also covers cellular concepts like frequency bands, modulation techniques, and components of the mobile station and subscriber identity module.
09 spread spectrumchameli devi group of institutionsSpread spectrum is an important encoding method for wireless communications that spreads analog and digital data over a wide bandwidth using either frequency hopping or direct sequence techniques. Frequency hopping spread spectrum (FHSS) transmits a signal over a seemingly random series of frequencies, making it difficult to jam. Direct sequence spread spectrum (DSSS) represents each data bit with a code sequence, spreading the signal across the frequency band. Code division multiple access (CDMA) allows multiple users to share the same bandwidth by assigning each a unique spreading code.
3GPP SON Series: RACH Optimization3G4GThis SON tutorial is part of the 3GPP Self-Organizing Networks series (#3GPPSONSeries). In this part we will look at Random Access Channel (RACH) Optimization
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Attacking GRX - GPRS Roaming eXchangeP1Security GRX is the global private network where telecom network operators exchange GPRS roaming traffic of their users. It’s also used for all M2M networks where roaming is used, and that is the case from some company’s truck fleet management system down to intelligence GPS location spybug tracking system.
GPRS has been there from 2.5G GSM networks to the upcoming LTE Advanced networks, and is now quite widespread technology, along with its attacks. GRX has had a structuring role in the global telecom world at a time where IP dominance was beginning to be acknowledged. Now it has expanded to a lightweight structure using both IP technologies and ITU-originated protocols.
In this presentation, we’ll see how this infrastructure is protected and how it can be attacked. We’ll discover the issues with specific telco equipment inside GRX, namely GGSN and SGSN but also now PDN Gateways in LTE and LTE Advanced “Evolved Packet Core”. We will see the implications of this with GTP protocol, DNS infrastructure, AAA servers and core network technologies such as MPLS, IPsec VPNs and their associated routing protocols. These network elements were rarely evaluated for security, and during our engagements with vulnerability analysis, we’ve seen several vulnerabilities that we will be showing in this speech.
We will demo some of the attacks on a simulated “PS Domain” network, that it the IP part of the Telecom Core Network that transports customers’ traffic, and investigate its relationships with legacy SS7, SIGTRAN IP backbones, M2M private corporate VPNs and telecom billing systems. We will also seem how automation enable us to succeed at attacks which are hard to perform and will show how a “sentinel” attack was able to compromise a telecom Core Network during one penetration test.
Ericsson optimization optiTerra SacrificeThe document provides an overview and analysis flow for optimizing the performance of a mobile network. It discusses various problems that can occur like low availability of control channels, congestion on signaling and traffic channels, and high drop call rates. For each problem, it lists probable causes and recommends actions to identify the issue and solutions to resolve it, such as adjusting configuration parameters, adding network capacity, or improving frequency planning. MML commands are also provided to check device logs, resources, and performance statistics for troubleshooting purposes.
Link budget calculationsitimunirah88This document provides training materials on calculating wireless link budgets to determine the feasibility and optimal configuration of radio links. It defines key concepts like free space loss, link budget, antenna gain and Fresnel zone. An example link budget calculation is shown for a 5km link. It also introduces the Radio Mobile software tool, which can automatically simulate radio links and calculate the required Fresnel zone clearance by considering terrain profiles. The document concludes with an example of using Radio Mobile to analyze a potential link in Chuuk and poses questions about configuring the masts, transmit power and antennas.
mobile radio propagation and fading GRAKESHKUMAR1) The document discusses small-scale fading in mobile radio channels caused by multipath propagation. Multipath signals interfere constructively and destructively, causing rapid fluctuations in received signal strength over small distances.
2) Key parameters that characterize multipath channels are delay spread (στ), coherence bandwidth (Bc), Doppler spread (BD), and coherence time (Tc). Delay spread and coherence bandwidth describe time dispersion, while Doppler spread and coherence time describe frequency dispersion from mobility.
3) There are different types of fading depending on how a signal's bandwidth compares to these channel parameters. Flat fading occurs when the signal bandwidth is narrow compared to the channel bandwidth, preserving the signal's spectral properties.
Lte kpi accessabilityDheeraj YadavThis document summarizes various LTE KPIs and performance metrics related to random access, RRC connection establishment, ERAB establishment, and issues that may impact them. It provides potential causes for high values or failures in these metrics as well as recommended actions to investigate like checking RF parameters, capacity, licenses, alarms, configuration, and optimizing physical antenna settings.
transmission line theory prpDr. Pravin PrajapatiThis document discusses transmission line theory and equations. It begins by introducing microwave frequencies and transmission lines. It then derives the transmission line equations that relate the voltage and current along the line to the line's per unit length resistance, inductance, conductance, and capacitance. These equations include the characteristic impedance and propagation constant. The document discusses how waves propagate on lossless transmission lines and the behavior of waves when the line is terminated by an impedance, including definitions of reflection coefficient and power flow.
Ieee 802.11 standardtanvuthThe document summarizes the IEEE 802.11 standard's layer management section. It discusses the MAC layer management entity (MLME) and physical layer management entity (PLME), which manage the MAC sublayer and PHY layer respectively. It then describes various management primitives and services accessed through the MLME service access point (SAP), including power management, scanning, synchronization, authentication, association, and disassociation.
Link budgetaibad ahmedThe document discusses satellite link budgets. It explains that a link budget establishes the resources needed to achieve performance objectives like bit error rate and link availability. The key components of a satellite link that impact the link budget are described, including transmitting and receiving earth stations, the satellite, transmission losses, and noise sources. Equations are provided that calculate factors like equivalent isotropically radiated power, free space loss, antenna gain, transmission losses from rain, atmospheric absorption and noise temperature.
Wi fi call flowsframedrelayThe document outlines various WiFi call flows, including open SSID with forwarding to a captive portal, secure SSID using 802.1x authentication, and PPPoE. The open SSID flow involves probe requests, DHCP requests, and redirection to a captive portal login page. The secure SSID flow uses 802.1x authentication with EAP requests and challenges. The PPPoE flow uses PPP authentication and configuration with RADIUS messages for access requests, replies and accounting.
IMS ENUM and DNS MechanismKent LohThis document discusses IMS ENUM and DNS mechanisms for mapping telephone numbers and SIP URLs. It contains the following information:
1. ENUM is defined as the E.164 Number Mapping that provides a system to unify telephone numbers with Internet addressing by mapping E.164 numbers to URIs like SIP.
2. When a UE invites another party using a SIP URL, DNS is used to resolve the URL to an IP address. But for TEL URLs, DNS cannot resolve it so ENUM is used to map the TEL URL to a SIP URL which can then be resolved.
3. If ENUM query for a TEL URL succeeds, the TEL URL is mapped to a SIP URL which
Lte rf-optimization-guideMuhammad AhsanThis document provides guidelines for optimizing LTE radio frequency (RF) networks. It describes the network optimization process, including single site verification and RF optimization. RF optimization aims to control pilot pollution while optimizing coverage, signal quality, and handover success rates. The document discusses LTE RF optimization objectives such as RSRP, SINR, and handover success rate. It also covers troubleshooting coverage issues like weak coverage, lack of a dominant cell, and cross coverage. Optimization methods include adjusting antenna parameters, transmit power, and network configuration parameters.
GNU RadiomilowenwenThis document discusses implementing a low probability of intercept (LPI) radio transmitter using GNU Radio and a USRP radio hardware platform. It provides an overview of the system architecture, describing how GNU Radio software interfaces with the USRP hardware. It then outlines the DSP design flow, including writing custom signal processing blocks in C++. Finally, it details the implementation of the LPI radio transmitter, describing blocks for Manchester encoding, amplitude modulation using oscillators, and configuration of the USRP for transmission.
3 g call flowAshish AggarwalThis document outlines the process for mobile originated and terminated calls in 3G networks. It describes the steps for a mobile originating call in 3 parts and a mobile terminated call in 3 parts, including setting up the GTP tunnel for transport. The document breaks down the end-to-end call flows for 3G connections.
Introduction to trace viewerLaura VillarrealTraceViewer is an application that allows tracing of network elements and subscribers to monitor network quality and troubleshoot problems. It collects trace data from elements and stores it in a database where it can be viewed as reports. Key features of TraceViewer include activating new traces, stopping traces, deleting traces, and viewing trace reports. The architecture involves TraceViewer installing on Linux servers with a GUI accessed via Java WebStart, while background tracing processes activate traces in network elements and collect data.
Diversity techniques presentation materialNini LashariThis document discusses various diversity techniques used in wireless communications to combat fading. It describes types of diversity including time, frequency, multiuser, and space diversity. It also outlines combining techniques such as selection combining, maximal ratio combining and equal gain combining that are used to improve the signal by combining signals from multiple diversity branches. The document concludes by discussing multiple input multiple output (MIMO) systems and orthogonal frequency division multiple access (OFDMA) schemes that exploit diversity and multiuser diversity.
sigtrankrsgowriThis document introduces Sigtran, a protocol suite defined by the IETF to transport signaling data like SS7 over IP networks. It describes the key components of Sigtran, including SCTP as the new transport protocol and various User Adaptation layers that allow SS7 and ISDN protocols to run over SCTP and IP. SCTP was created to address limitations of TCP for carrying time-sensitive signaling data and includes features like multi-streaming and structured message transport that make it more suitable than TCP for this purpose. The document outlines the full Sigtran protocol stack and how it maps existing signaling protocols to the new transport layers.
WiMAX (IEEE 802.16)Sajid MarwatThe document discusses the WiMAX (IEEE 802.16) wireless broadband standard. It provides an overview of the standard, including its physical layer specifications and MAC layer features. Key points covered include WiMAX targeting wireless broadband services up to 31 miles at over 100 Mbps, its use of OFDM and OFDMA technologies, support for QoS and different data protocols, and comparisons between WiMAX and Wi-Fi standards.
Presentation of the IEEE 802.11a MAC LayerMahdi Ahmed JamaThe document provides an overview of the IEEE 802.11 MAC protocol through a presentation. It discusses topics such as IEEE 802.11 layers, channels, infrastructure networks, ad hoc networks, joining a network, synchronization, communication approaches, MAC functionality including PCF and DCF, encryption, fragmentation, management functions, and MAC frame formats. The presentation was given on May 9th, 2001 by Mahdi Ahmed Jama to provide an introduction to the IEEE 802.11a MAC protocol.
LTE Attach Call Flow_Vi.pptxGaganVerma62The document discusses the LTE attach call flow process, including:
1. An overview of the evolution of cellular systems and the introduction of 5G.
2. The decoding processes involved in LTE attach which include frequency scanning, decoding the PSS, SSS, MIB, PDCCH, and SIBs.
3. The steps in the LTE attach process such as the random access channel process, sending an RRC connection request, receiving an RRC connection setup, and responding with an RRC connection setup complete message.
OPEN SHORTEST PATH FIRST (OSPF)Ann JosephOSPF is an intra-domain routing protocol that uses a link-state algorithm to calculate the shortest path to destinations within an autonomous system. It divides an autonomous system into areas to limit routing updates and allows for route summarization between areas. OSPF uses hello packets to discover neighbors, database description packets to exchange routing information, link-state request packets to request updates, and link-state acknowledgment packets to acknowledge receipt of updates.
Self-Configuration and Self-Optimization NetworkPraveen KumarThe document discusses self-configuration and self-optimization capabilities in cellular networks. It describes functions like dynamic configuration of interfaces between network elements, automatic neighbor relation functions to detect neighboring cells, and framework for physical channel identification selection. It also covers self-optimization aspects like energy saving, interference reduction, mobility robustness optimization, load balancing optimization, and interference coordination.
Short notes about "Multi-user Radio Communications Part 1mohamedmohyshaheenThis document provides an introduction to multiuser radio communications. It discusses multiple access techniques including FDMA, TDMA, CDMA, and SDMA. Satellite communications are presented as the first type of multiuser system, including components of the transponder. Radio link analysis is also covered, beginning with the free space propagation model and relationships between power density, radiation intensity, and distance from the source. Key parameters for link budget analysis like required and received Eb/N0 values and link margin are defined.
Analog and digital communication 2 marksBadri Surya1. The document contains a question bank with answers related to analog and digital communications. It includes questions on topics like AM signal generation, bandwidth calculation, power distribution, modulation index, FM signal generation, and comparisons between different modulation techniques.
2. Questions cover calculating bandwidth of AM and FM signals using formulas like Carson's rule, determining modulation index, carrier and sideband powers in AM, drawing waveforms of modulated signals, advantages of SSB modulation, differences between direct and indirect FM.
3. Key concepts like bandwidth requirements in FM increasing with modulation index and advantages of angle modulation over amplitude modulation are also explained in the question answers.
、r、ssujinchingThe document discusses key performance indicators RSRP, RSRQ, and SINR used for measuring cellular network signal quality. It defines RSRQ as the ratio of RSRP to the total received power over a specific number of resource blocks, and SINR as the ratio of signal power to interference plus noise power over the resource blocks allocated to the user equipment. It also notes that without a reference signal power boost and with evenly distributed interference, RSRQ is equal to the inverse of SINR plus the resource block loading percentage, divided by 12.
transmission line theory prpDr. Pravin PrajapatiThis document discusses transmission line theory and equations. It begins by introducing microwave frequencies and transmission lines. It then derives the transmission line equations that relate the voltage and current along the line to the line's per unit length resistance, inductance, conductance, and capacitance. These equations include the characteristic impedance and propagation constant. The document discusses how waves propagate on lossless transmission lines and the behavior of waves when the line is terminated by an impedance, including definitions of reflection coefficient and power flow.
Ieee 802.11 standardtanvuthThe document summarizes the IEEE 802.11 standard's layer management section. It discusses the MAC layer management entity (MLME) and physical layer management entity (PLME), which manage the MAC sublayer and PHY layer respectively. It then describes various management primitives and services accessed through the MLME service access point (SAP), including power management, scanning, synchronization, authentication, association, and disassociation.
Link budgetaibad ahmedThe document discusses satellite link budgets. It explains that a link budget establishes the resources needed to achieve performance objectives like bit error rate and link availability. The key components of a satellite link that impact the link budget are described, including transmitting and receiving earth stations, the satellite, transmission losses, and noise sources. Equations are provided that calculate factors like equivalent isotropically radiated power, free space loss, antenna gain, transmission losses from rain, atmospheric absorption and noise temperature.
Wi fi call flowsframedrelayThe document outlines various WiFi call flows, including open SSID with forwarding to a captive portal, secure SSID using 802.1x authentication, and PPPoE. The open SSID flow involves probe requests, DHCP requests, and redirection to a captive portal login page. The secure SSID flow uses 802.1x authentication with EAP requests and challenges. The PPPoE flow uses PPP authentication and configuration with RADIUS messages for access requests, replies and accounting.
IMS ENUM and DNS MechanismKent LohThis document discusses IMS ENUM and DNS mechanisms for mapping telephone numbers and SIP URLs. It contains the following information:
1. ENUM is defined as the E.164 Number Mapping that provides a system to unify telephone numbers with Internet addressing by mapping E.164 numbers to URIs like SIP.
2. When a UE invites another party using a SIP URL, DNS is used to resolve the URL to an IP address. But for TEL URLs, DNS cannot resolve it so ENUM is used to map the TEL URL to a SIP URL which can then be resolved.
3. If ENUM query for a TEL URL succeeds, the TEL URL is mapped to a SIP URL which
Lte rf-optimization-guideMuhammad AhsanThis document provides guidelines for optimizing LTE radio frequency (RF) networks. It describes the network optimization process, including single site verification and RF optimization. RF optimization aims to control pilot pollution while optimizing coverage, signal quality, and handover success rates. The document discusses LTE RF optimization objectives such as RSRP, SINR, and handover success rate. It also covers troubleshooting coverage issues like weak coverage, lack of a dominant cell, and cross coverage. Optimization methods include adjusting antenna parameters, transmit power, and network configuration parameters.
GNU RadiomilowenwenThis document discusses implementing a low probability of intercept (LPI) radio transmitter using GNU Radio and a USRP radio hardware platform. It provides an overview of the system architecture, describing how GNU Radio software interfaces with the USRP hardware. It then outlines the DSP design flow, including writing custom signal processing blocks in C++. Finally, it details the implementation of the LPI radio transmitter, describing blocks for Manchester encoding, amplitude modulation using oscillators, and configuration of the USRP for transmission.
3 g call flowAshish AggarwalThis document outlines the process for mobile originated and terminated calls in 3G networks. It describes the steps for a mobile originating call in 3 parts and a mobile terminated call in 3 parts, including setting up the GTP tunnel for transport. The document breaks down the end-to-end call flows for 3G connections.
Introduction to trace viewerLaura VillarrealTraceViewer is an application that allows tracing of network elements and subscribers to monitor network quality and troubleshoot problems. It collects trace data from elements and stores it in a database where it can be viewed as reports. Key features of TraceViewer include activating new traces, stopping traces, deleting traces, and viewing trace reports. The architecture involves TraceViewer installing on Linux servers with a GUI accessed via Java WebStart, while background tracing processes activate traces in network elements and collect data.
Diversity techniques presentation materialNini LashariThis document discusses various diversity techniques used in wireless communications to combat fading. It describes types of diversity including time, frequency, multiuser, and space diversity. It also outlines combining techniques such as selection combining, maximal ratio combining and equal gain combining that are used to improve the signal by combining signals from multiple diversity branches. The document concludes by discussing multiple input multiple output (MIMO) systems and orthogonal frequency division multiple access (OFDMA) schemes that exploit diversity and multiuser diversity.
sigtrankrsgowriThis document introduces Sigtran, a protocol suite defined by the IETF to transport signaling data like SS7 over IP networks. It describes the key components of Sigtran, including SCTP as the new transport protocol and various User Adaptation layers that allow SS7 and ISDN protocols to run over SCTP and IP. SCTP was created to address limitations of TCP for carrying time-sensitive signaling data and includes features like multi-streaming and structured message transport that make it more suitable than TCP for this purpose. The document outlines the full Sigtran protocol stack and how it maps existing signaling protocols to the new transport layers.
WiMAX (IEEE 802.16)Sajid MarwatThe document discusses the WiMAX (IEEE 802.16) wireless broadband standard. It provides an overview of the standard, including its physical layer specifications and MAC layer features. Key points covered include WiMAX targeting wireless broadband services up to 31 miles at over 100 Mbps, its use of OFDM and OFDMA technologies, support for QoS and different data protocols, and comparisons between WiMAX and Wi-Fi standards.
Presentation of the IEEE 802.11a MAC LayerMahdi Ahmed JamaThe document provides an overview of the IEEE 802.11 MAC protocol through a presentation. It discusses topics such as IEEE 802.11 layers, channels, infrastructure networks, ad hoc networks, joining a network, synchronization, communication approaches, MAC functionality including PCF and DCF, encryption, fragmentation, management functions, and MAC frame formats. The presentation was given on May 9th, 2001 by Mahdi Ahmed Jama to provide an introduction to the IEEE 802.11a MAC protocol.
LTE Attach Call Flow_Vi.pptxGaganVerma62The document discusses the LTE attach call flow process, including:
1. An overview of the evolution of cellular systems and the introduction of 5G.
2. The decoding processes involved in LTE attach which include frequency scanning, decoding the PSS, SSS, MIB, PDCCH, and SIBs.
3. The steps in the LTE attach process such as the random access channel process, sending an RRC connection request, receiving an RRC connection setup, and responding with an RRC connection setup complete message.
OPEN SHORTEST PATH FIRST (OSPF)Ann JosephOSPF is an intra-domain routing protocol that uses a link-state algorithm to calculate the shortest path to destinations within an autonomous system. It divides an autonomous system into areas to limit routing updates and allows for route summarization between areas. OSPF uses hello packets to discover neighbors, database description packets to exchange routing information, link-state request packets to request updates, and link-state acknowledgment packets to acknowledge receipt of updates.
Self-Configuration and Self-Optimization NetworkPraveen KumarThe document discusses self-configuration and self-optimization capabilities in cellular networks. It describes functions like dynamic configuration of interfaces between network elements, automatic neighbor relation functions to detect neighboring cells, and framework for physical channel identification selection. It also covers self-optimization aspects like energy saving, interference reduction, mobility robustness optimization, load balancing optimization, and interference coordination.
Short notes about "Multi-user Radio Communications Part 1mohamedmohyshaheenThis document provides an introduction to multiuser radio communications. It discusses multiple access techniques including FDMA, TDMA, CDMA, and SDMA. Satellite communications are presented as the first type of multiuser system, including components of the transponder. Radio link analysis is also covered, beginning with the free space propagation model and relationships between power density, radiation intensity, and distance from the source. Key parameters for link budget analysis like required and received Eb/N0 values and link margin are defined.
Analog and digital communication 2 marksBadri Surya1. The document contains a question bank with answers related to analog and digital communications. It includes questions on topics like AM signal generation, bandwidth calculation, power distribution, modulation index, FM signal generation, and comparisons between different modulation techniques.
2. Questions cover calculating bandwidth of AM and FM signals using formulas like Carson's rule, determining modulation index, carrier and sideband powers in AM, drawing waveforms of modulated signals, advantages of SSB modulation, differences between direct and indirect FM.
3. Key concepts like bandwidth requirements in FM increasing with modulation index and advantages of angle modulation over amplitude modulation are also explained in the question answers.
、r、ssujinchingThe document discusses key performance indicators RSRP, RSRQ, and SINR used for measuring cellular network signal quality. It defines RSRQ as the ratio of RSRP to the total received power over a specific number of resource blocks, and SINR as the ratio of signal power to interference plus noise power over the resource blocks allocated to the user equipment. It also notes that without a reference signal power boost and with evenly distributed interference, RSRQ is equal to the inverse of SINR plus the resource block loading percentage, divided by 12.
Pioneer АВ ресиверы 2014 - ХарактеристикиPioneer EuropePioneer АВ ресиверы 2014:
Заходите на сайт www.pioneer-rus.ru/av-receivers чтобы узнать подробнее о наших ресиверах
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Заходите на сайт www.pioneer-rus.ru чтобы узнать подробнее о наших ресиверах
Talan rureicomЦифровой анализатор проводных и телефонных линий TALAN позволяет проводить обследование линий на наличие устройств негласного съема и утечки информации. Анализатор Талан – многофункциональный прибор сочетающий в себе большинство возможных технических методов проверки проводных линий.
1. ПРОФЕССИОНАЛЬНОЕ РАДИОПРИЕМНОЕ
УСТРОЙСТВО HF ДИАПАЗОНА ЧАСТОТ
С ЦИФРОВОЙ ОБРАБОТКОЙ СИГНАЛОВ
«ГАЛАКТИКА-М»
Радиоприемное устройство (РПУ) «Галактика-М» разработано на замену серийного РПУ Р-324К и
предназначено для эксплуатации в составе радиоцентров или автономно для приема и демодуляции
широкого класса сигналов в диапазоне частот от 1,0 до 30,0 МГц.
РПУ имеет компьютерное управление через интерфейсы USB или RS-232. Информация с выхода
приемника представлена в виде битовой последовательности демодулированного сигнала или цифровых
квадратурных отсчетов (только через USB-порт). В приемнике также имеются традиционные НЧ и ТЛГ
выходы для подключения оконечной аппаратуры и воспроизведения речевой информации.
Приемник укомплектован панелью управления. Панель управления имеет цветной
жидкокристаллический индикатор, облегчающий управление приемником через меню функций и
дополнительно обеспечивает индикацию спектра принимаемого сигнала.
Приемник построен по схеме прямого преобразования принимаемого сигнала с оцифровкой 16-ти
разрядным АЦП и DDC-конвертированием в сигнал НЧ с последующей обработкой его DSP-процессором с
плавающей арифметикой.
Прямое цифровое преобразование и отсутствие аналогового преобразования сигнала резко
повысило фазовую стабильность, реальную помехоустойчивость приемника из-за отсутствия в нем
побочных каналов приема вида ±mfс и ±mfгт, канала ПЧ, зеркального канала, а также повысило
стабильность и повторяемость параметров. Отсутствие аналогового гетеродина упростило меры по
обеспечению электромагнитной совместимости приемника с другими радиосредствами.
Встроенный калибратор контрольного сигнала совместно с анализатором спектра позволяет
использовать РПУ «Галактика-М» для измерения параметров сигнала и помех.
Наличие в комплекте РПУ согласующих устройств «75 Ом – 50 Ом» и «200 Ом – 50 Ом» расширяет
возможности при работе приемника в приемных комплексах с различными ВЧ-трактами антенно-
фидерных систем.
Благодаря использованию в приемнике узкополосного перестраиваемого преселектора с разбивкой
на 192 дискретных фильтра с полосой пропускания частот не более 5 % относительно частоты настройки,
эффективной системы АРУ и РРУ, дало возможность приемнику прямого преобразования работать с
эффективными антеннами приемных центров.
Электропитание приемника может осуществляться как от бортовой сети 27 В, так и от
промышленной сети 220 В, 50 Гц с использованием штатного источника питания.
Внешний вид РПУ «Галактика-М» СОСТАВ
Блок узкополосного перестраиваемого преселектора
Блок усиления принимаемого сигнала
Блок DSP-тракта и контроллера
Блок формирования опорных частот
Устройство формирования выходных сигналов
Блок вторичных источников питания
Панель управления с цветным жидко-кристаллическим
индикатором
Кожух с сетевым источником питания.
Устройство согласования с линиями 200 Ом (или 75 Ом)
Комплект соединительных кабелей
Комплект эксплуатационной документации
СD с библиотекой программ дистанционного
управления РПУ
2. ТЕХНИЧЕСКИЕ ХАРАКТЕРИСТИКИ
Диапазон рабочих частот 1,0 … 30,0 МГц
Антенный вход Zвх = 50 Ом
КСВн антенного входа < 1,8
Чувствительность при SNR = 10 дБ, BW = 3 кГц < 0,35 мкВ
Динамический диапазон по компрессии выходного сигнала
на 1 дБ под действием односигнальных помех при отстройке:
на 50 кГц 126 дБ
на 5 % 132 дБ
Динамический диапазон по интермодуляции 3-го порядка > 90 дБ
Полоса пропускания частот радиотракта (по уровню –3 дБ) 0.05∙fo
Полоса пропускания частот фильтра (устанавливается с шагом 1 Гц) 0,03 … 12 кГц
Прямоугольность амплитудно-частотной характеристики ФОС 1,1 … 1,5
Избирательность по соседнему каналу > 85 дБ
Регулировка ослабления входного аттенюатора 0 … 45 дБ, шаг 3 дБ
Глубина регулировки АРУ 120 дБ
Постоянные времени АРУ:
«заряда» 1 … 100 мс
«разряда» 0,1/0,5/1/3/10 с
Разрядность ADC цифрового тракта 16 бит
Подавление побочных каналов приема > 90 дБ
Относительная нестабильность частоты 0,5·10-7
Время перестройки частоты приемника 0,5 мс (макс.)
Шаг перестройки по частоте 1 Гц
Спектральная плотность шумов гетеродина (при отстройке 1 кГц) ≤ –120 дБс/Гц
Оценка качества уровня принимаемого сигнала в дБмкВ
Демодуляция сигналов AM, ASK, FSK2, CW,
PSK2, USB, LSB
Регулировка частоты тонального гетеродина (BFO) 3 кГц, шаг 10 Гц
Регулировка громкости НЧ-сигнала 0 … 40 дБ, шаг 1 дБ
Параметры выходов:
НЧ-выход для подключения головных телефонов 50 Ом, 1 В
НЧ-выход для подключения громкоговорителя 2 Вт 4 Ом, 3 В
ТЛГ-выход 1 уровень ТТЛ
ТЛГ-выход 2 ± 30 В
ПЧ-выход 0 … 500 кГц, 200 мВ
Дистанционное управление (Remote) USB, RS232
Частота дискретизации выходных I/Q-отсчетов 11,025 (22,050) кГц
Количество отображаемых компонент спектра 256
Потребляемая мощность не более 20 Вт
Габаритные размеры (1/2 крейт 3U) 140 × 460 × 270 мм
ООО «Научно-технический центр радиотехнических систем АН ПРЭ»
Украина, 61001 г. Харьков, пл. Восстания 7/8,
+38 (057) 732-25-53, факс +38 (057) 732-68-63, E-mail: ntcrts@kharkiv.com