Receivers are devices that receive radio signals at their destination. There are two main types of receivers: tuned radio frequency (TRF) receivers and superheterodyne receivers. TRF receivers were once widely used but are now limited to fixed frequency applications due to issues with selectivity and instability at higher frequencies. Superheterodyne receivers mix the incoming radio signal with a local oscillator signal to convert it to a lower intermediate frequency, addressing the issues with TRF receivers and providing more uniform gain and selectivity across frequencies.
Frequency-Shift Keying, also known as FSK is a type of digital frequency modulation. It is also often called as binary frequency shift keying or BFSK
Similar to analog FM, it is a constant-amplitude angle modulation.
This presentation will discuss the concepts behind FSK
Frequency-Shift Keying, also known as FSK is a type of digital frequency modulation. It is also often called as binary frequency shift keying or BFSK
Similar to analog FM, it is a constant-amplitude angle modulation.
This presentation will discuss the concepts behind FSK
It contains the introduction of Low Pass Filter and classification of the same in Signals & Systems point of view. It is a brief presentation done by me as a case study of L.P.F. in college.
Unlocking Productivity: Leveraging the Potential of Copilot in Microsoft 365, a presentation by Christoforos Vlachos, Senior Solutions Manager – Modern Workplace, Uni Systems
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Generative AI Deep Dive: Advancing from Proof of Concept to ProductionAggregage
Join Maher Hanafi, VP of Engineering at Betterworks, in this new session where he'll share a practical framework to transform Gen AI prototypes into impactful products! He'll delve into the complexities of data collection and management, model selection and optimization, and ensuring security, scalability, and responsible use.
GraphSummit Singapore | The Art of the Possible with Graph - Q2 2024Neo4j
Neha Bajwa, Vice President of Product Marketing, Neo4j
Join us as we explore breakthrough innovations enabled by interconnected data and AI. Discover firsthand how organizations use relationships in data to uncover contextual insights and solve our most pressing challenges – from optimizing supply chains, detecting fraud, and improving customer experiences to accelerating drug discoveries.
GraphSummit Singapore | The Future of Agility: Supercharging Digital Transfor...Neo4j
Leonard Jayamohan, Partner & Generative AI Lead, Deloitte
This keynote will reveal how Deloitte leverages Neo4j’s graph power for groundbreaking digital twin solutions, achieving a staggering 100x performance boost. Discover the essential role knowledge graphs play in successful generative AI implementations. Plus, get an exclusive look at an innovative Neo4j + Generative AI solution Deloitte is developing in-house.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...SOFTTECHHUB
The choice of an operating system plays a pivotal role in shaping our computing experience. For decades, Microsoft's Windows has dominated the market, offering a familiar and widely adopted platform for personal and professional use. However, as technological advancements continue to push the boundaries of innovation, alternative operating systems have emerged, challenging the status quo and offering users a fresh perspective on computing.
One such alternative that has garnered significant attention and acclaim is Nitrux Linux 3.5.0, a sleek, powerful, and user-friendly Linux distribution that promises to redefine the way we interact with our devices. With its focus on performance, security, and customization, Nitrux Linux presents a compelling case for those seeking to break free from the constraints of proprietary software and embrace the freedom and flexibility of open-source computing.
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Threats to mobile devices are more prevalent and increasing in scope and complexity. Users of mobile devices desire to take full advantage of the features
available on those devices, but many of the features provide convenience and capability but sacrifice security. This best practices guide outlines steps the users can take to better protect personal devices and information.
2. • Receivers are meant for receiving the Signals at Destination.
• These are the most important part of a Communication Systems.
Types Of Receivers
• Tuned Radio Frequency Rx.
• Superheterodyne Rx.
3. TRF (TUNED RADIO FREQUENCY) RECEIVER
1st RF
Amplifier
Audio
Amplifier
2nd RF
Amplifier
Detector
Power
Amplifier
Ganged Tuning
4. • The TRF Receiver was the most widely used Receivers but now it is no longer used. The Use of this receiver is
limited to fixed frequency special applications.
• This is meant for it’s Simplicity and high sensitivity.
Working of the TRF Receiver
• At initial Stage, it first catches the RF Signals from Radio Transmitters as shown in figure.
• There after a few Radio Frequency (RF) Amplifiers are used ; Two in this case or Three can also be used. The
main application of these amplifiers is to amplify the incoming frequencies from transmitter and also reject
other unwanted frequencies fed it to next stage.
• The word “ganged” used here to show that the multiple stages are coupled together using a single
Connection.
• Tuning Provides sufficient gain and selectivity.
• After the signal is amplified to a certain level, then it is fed to detector to demodulate the signal.
5. • The Output of the Detector i.e. demodulated signal is fed to the Audio amplifier. It amplifies the signal to a
further level.
• Thereafter the power amplifier matches the output impedence to input impedence. And the output of the
power amplifier is then fed to the speaker.
• Such receivers were simple to design and align at broadcast frequencies (53kHz to 1640 kHz), but they
presented difficulties at higher frequencies. This was mainly because of the instability associated with high gain
being achieved at one frequency by a multistage amplifier.
• The TRF receiver suffered from a variation in bandwidth over the tuning range.
• It was unable to achieve sufficient selectivity at high frequencies, partly as a result of the enforced use of
single-tuned circuits. It was not possible to use double-tuned RF amplifiers in this receiver, although it was
realized that they would naturally yield better selectivity.
• This was due to the fact that all such amplifiers had to be tunable, and the difficulties of making several double-
tuned amplifiers tune in unison were too great.
• The problems of instability, insufficient adjacent-frequency rejection, and bandwidth variation can all be solved
by the use of a superheterodyne receiver, which introduces relatively few problems of its own.
6. SUPER HETERODYNE RECEIVER
RF Stage
Local
Oscillator
Mixer
IF
Amplifier
Detector
Audio
And Power
Amplifier
Ganged Tuning
ACF
f0
f1
(f0 – f1)
7. • In the super heterodyne receiver, the incoming signal voltage is combined with a signal generated in the
receiver.
• This local oscillator voltage is normally converted into a signal of a lower fixed frequency.
• The signal at this intermediate frequency contains the same modulation as the original carrier, and it is now
amplified and detected to reproduce the original information.
• The super heterodyne Rx has the same essential components as the TRF receiver, in addition to the mixer, local
oscillator and intermediate-frequency (IF) amplifier.
• A constant frequency difference is maintained between the local oscillator and the RF circuits normally through
capacitance tuning, in which all the capacitors are ganged together and operated in unison by one control knob.
• The IF amplifier generally uses two or three transformers, each consisting of a pair of mutually Coupled tuned
circuits. With this large number of double-tuned circuits operating at a constant, specially chosen frequency, the
IF amplifier provides most of the gain (and therefore sensitivity) and bandwidth requirements of the receiver.
• the characteristics of the IF amplifier are independent of the frequency to which the receiver is tuned, the
selectivity and sensitivity of the super heterodyne are usually fairly uniform throughout its tuning range and not
subject to the variations that affect the TRF receiver.
• The RF circuhs arc now used mainly to select the wanted frequency, to reject interference such as the
imagejrequency and (especially at high frequencies) to reduce the noise figure of the receiver.
8. WORKING
• The RF stage is normally a wideband RF amplifier tunable from approximately 540 kHz to 1650 kHz (standard
commercial AM band). It is mechanically tied to the local oscillator to ensure precise tuning characteristics.
• The local oscillator is a variable oscillator capable of generating a signal from 0.995 MHz to 2.105 MHz. The
incoming signal from the transmitter is selected and amplified by the RF stage. It is then combined (mixed)
with a predetermined local oscillator signal in the mixer stage. (During this stage, a class C nonlinear device
processes the signals, producing the sum, difference, and originals.)
• The signal from the mixer is then supplied to the IF (intermediate-frequency) amplifier. This amplifier is a
very-narrow-bandwidth class A device capable of selecting a frequency of 0.455 kHz ± 3 kHz and rejecting all
others.
• The IF signal output is an amplified composite of the modulated RF from the transmitter in combination with
RF from the local oscillator. Neither of these signals is usable without further processing. The next process is
in the detector stage, which eliminates one of the sidebands still present and separates the RF from the audio
components of the other sideband. The RF is filtered to ground, and audio is supplied or fed to the audio
stages for amplification and then to the speakers, etc.