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PSK31 Audio Beacon Kit
PSK31 Audio Beacon Kit Build this programmable single-chip generator of PSK31-encoded audio data streams and use it as a signal generator, a beacon input to your SSB rig — or as the start of a single-chip PSK31 controller! Version 2, July 2001 Created by the New Jersey QRP Club The NJQRP “PSK31 Audio Beacon Kit” 1 PSK31 Audio Beacon Kit OVERVIEW Here’s an easy, fun and intriguingly use- ting at a laptop equipped with DigiPan Thank you for purchasing the PSK31 phase relationships at bit transitions, and ful project that has evolved from an on- software. Zudio Beacon from the New Jersey QRP the schematic has been augmented with going design effort to reduce the complex- Club! We think you’ll have fun assem- Construction is simple and straightfor- helpful notations. ity of a PSK31 controller. bling and operating this inexpensive-yet- ward and you’ll have immediate feedback For the very latest information, software flexible audio modulator as PSK31-en- A conventional PC typically provides on how your Beacon works when you updates, and kit assembly & usage tips, coded data streams. the relatively intensive computing power plug in a 9V battery and speaker. please be sure to see the PSK31 Beacon required for PSK31 modulation and de- This project was first introduced as a kit Beacon Features website at http://www.njqrp.org/ modulation. at the Atlanticon QRP Forum in March psk31beacon/psk31beacon.html . Visit n Single-chip implementation of 2001, and then published in a feature ar- soon and often, as it’s guaranteed to be With this Beacon project, however, the PSK31 encoding and audio waveform gen- ticle of QST magazine in its August 2001 helpful! PSK31 modulation computations have eration. -
Console Comparison
CONSOLE COMPARISON CURRENT INTEGRITY Cybex 50L Console C Console X Console Discover ST Cybex 70T Discover SE3 Discover SE3HD SCREEN 21" 1080p Touch Screen (Tread) 19" 720p Touch Screen (Tread) 21" 1080p Touch Screen (Tread) Display LED LED LED 7" Touch LCD 16" 1080p Touch Screen (Tread, Bikes and Arcs) 16" 1080p Touch Screen (Non-Tread) 16" 720p Touch Screen (Non-Tread) 16" 1080p Touch Screen (Non-Tread) Navigation Membrane buttons Membrane Buttons Membrane Buttons Touch, Tactile Buttons Touch Screen Touch Screen Touch Screen Touch Screen Languages 9 Universal Universal 19 24 24 24 24 Speed, Distance, Distance Climbed, Average Pace, Average Speed, Speed, Incline, Heart Rate (current, average, max), Pace, Elapsed Speed, Incline, Heart Rate (current, average, max), Pace, Elapsed Speed, Incline, Heart Rate (current, average, max), Pace, Elapsed Speed, Incline, Heart Rate (current, average, max), Pace, Elapsed Speed, Incline, Heart Rate, Elapsed Time, Pace, Distance, Distance Display Readouts - Treadmills Speed, Time, Distance, HR, Calories, Incline, Pace Speed, Time, Distance, HR, Calories, Incline Total Cal Burned, Average METs, Average Watts, Average HR, Max Time, Time Remaining, Time in Zone, Time of Day, Distance, Distance Time, Time Remaining, Time in Zone, Time of Day, Distance, Distance Time, Time Remaining, Time in Zone, Time of Day, Distance, Distance Time, Time Remaining, Time in Zone, Time of Day, Distance, Distance Climbed, Calories, Calories/HR HR Climbed, Distance Remaining, Calories, Calories/HR Climbed, Distance Remaining, -
BA(Prog)III Yr 11/04/2020
BA(prog)III yr 11/04/2020 Analog Video • In an analog system, the output of the charge-coupled device (CCD) is processed by the camera into three channels of color information and synchronization pulses (sync) and the signals are recorded onto magnetic tape. • There are several video standards for managing analog CCD output, each dealing with the amount of separation between the components—the more separation of the color information, the higher the quality of the image (and the more expensive the equipment). • If each channel of color information is transmitted as aseparate signal on its own conductor, the signal output is called component (separate red, green, and blue channels), which is the preferred method for higher-quality and professional video work. • Lower in quality is the signal that makes up Separate Video (S-Video), using two channels that carry luminance and chrominance information. The least separation (and thus the lowest quality for a video signal) is composite, when all the signalsare mixed together and carried on a single cable as a composite of the three color channels and the sync signal. • The composite signal yields less-precise color definition, which cannot be manipulated or color-corrected as much as S-Video or component signals. • The analog video and audio signals are written to tape by a spinning recording head that changes the local magnetic properties of the tape’s surface in a series of long diagonal stripes. • Because the head is canted or tilted at a slight angle compared with the path of the tape, it follows a helical (spiral) path, which is called helical scan recording. -
NTE15039 Integrated Circuit VHS/VCR Chroma Signal Proessor for NTSC/PAL/SECAM Systems
NTE15039 Integrated Circuit VHS/VCR Chroma Signal Proessor for NTSC/PAL/SECAM Systems Description: The NTE15039 is a multifunctional IC in a 24–Lead DIP type package that contains VHS VCT chroma signal processing circuitry. Since the package is small and a minimum number of external compo- nents are required, the NTE15039 occupies much less space on the PC board thus facilitating VCR design. The chroma section is made adjustment–free (except REC chroma level) thus streamlining the manufacture of VCRs Features: D Designed for NTSC/PAL/MESECAM Systems D Adjustment–Free Chroma Section (Except REC Chroma Level) D Few External Components Required D LPF Usable for REC/PB D Multifunctional: 2fSC Generator for CCD Drive Function to Select APC Loop Input Signal Passed/Not Passed Through Comb Filter 3rd Lock Protector of VXO Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Maximum Supply Voltage, VCCmax. 7V Allowable Power Dissipation (TA ≤ +65°C), PDmax. 850mW Operating Temperature Range, Topg . –10° to +65°C Storage Temperature Range, Tstg . –40° to +125°C Recommended Operating Conditions: (TA = +25°C unless otherwise specified) Recommended Supply Voltage, VCC . 5V Operating Voltage Range, VCCop. 4.8 to 5.5V Electrical Characteristics: (TA = +25°C, VCC = 5V unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit REC Current Dissipation ICC(R) 49 62 75 mA REC Output Level VO(R) 75 110 145 mVP–P REC ACC Characteristics ∆VO(R) Input ± 6dB –0.5 ±0.1 +0.5 dB Electrical Characteristics (Cont’d): (TA = +25°C, VCC -
Packet Status Register Every Ohio
TAPR #97 AUTUMN 2005 President’s Corner 1 TAPR Elects New President 2 PACKET 2005 DCC Report 3 New SIG for AX.25 Layer 2 Discussions 4 20th Annual SW Ohio Digital Symposium 4 STATUS AX.25 as a Layer 2 Protocol 5 Towards a Next Generation Amateur Radio Network 6 TM REGISTER TAPR Order Form 29 President’s Corner Mi Column es Su Column This marks my inaugural from you to confirm this. We are moving to more membership experience and involvement in projects. column in PSR as TAPR widely embrace and promote cutting edge technology, We are continuing to streamline the management of President. Some of you may and while this is not really new for us, it does mean that the office, and to assist this initiative, I will draw your remember me from my past we will be contemplating a shift in focus so that packet attention to the improvements that have been made incarnation on the TAPR will not really be our main or only focus. Digital modes to the web site. The responses we have seen so far have Board of Directors. It seems and technology will still be central, but I think you’ll been overwhelmingly positive, and we welcome further like another lifetime ago, but it wasn’t so long ago that appreciate our attempts to marry digital with analog feedback. TAPR was born in Tucson. In fact, next year will mark (you remember analog, don’t you?) and microwaves, I would like to make this column YOUR column, the twenty-fifth anniversary of our incorporation. -
ATSC: Digital Television Update
ATSC: Digital Television Update Robert Graves Advanced Television Systems Committee ITU Interregional Seminar on the Transition from SECAM to Digital TV Broadcasting Kiev, Ukraine November 13, 2000 Advanced Television Systems Committee q Technical Standards for Digital Television (DTV) q DTV Implementation Activities q Membership Organization -- International – Open to all organizations with a related interest – Broad, cross-industry participation • Broadcasters, cable, satellite, computer, movie & telecom service providers • Consumer electronics, computer & professional equipment companies q Over 200 Members – Growing A2 Options for DTV Business Models q HDTV (one or two programs) q HDTV + SDTV (e.g., weather, news, alternative program) q Multiple programs of SDTV q Data services – Program-related or not – Interactive or one-way q Combinations of HDTV, SDTV, data services q Programs or data to mobile receivers? – Severe trade-off against deliverable bit rate q Broadcast to TVs, PCs, or convergence products q Free-to-air vs. pay services q Impact of potential government requirements – Minimum HDTV requirements? G2 DTV CHANNEL ASSIGNMENTS IN THE U.S. (VHF and UHF) Spectrum Efficiency CURRENT NTSC CHANNEL DISTRIBUTION 2-4 5-6 7 - 13 14 - 36 38 - 69 18 12 42 138 192 = DTV CHANNEL ALLOCATION - END OF TRANSITION CORE DTV SPECTRUM 2-4 5-6 7 - 13 14 - 36 38 - 51 52 – 69 (recovered) 18 12 42 138 84 = 294 MHz 108 MHz RECOVERED Progress in DTV Deployment qCurrent requirement: – 120 Stations – 30 Metropolitan Areas 10010101001101001110110 qActual -
DVB-T Transmissions – Interference with Adjacent-Channel PAL Services
DVB-T DVB-T transmissions – interference with adjacent-channel PAL services R. Poole BBC Research & Development In the UK, many of the new digital television (DVB-T) services are broadcast in adjacent channels to existing PAL services. There have been reports of PAL reception suffering as a result, possibly because the maximum DVB-T sideband levels have been incorrectly specified. This article describes how to calculate the PAL picture impairment arising from the presence of DVB-T sidebands. It also compares the calculated predictions with experimental data. The conclusion is that the sideband specification is correct: critical viewers would just notice worst-case interference. However, it is possible to misinterpret the specification. An allowance must be made for the difference in effective radiated powers between the DVB-T and PAL transmissions. An example is given of how a mistake could be made. Introduction There have been reports that some of the new digital television transmissions have been caus- ing interference to existing PAL services in adjacent channels. Such interference could result from three possible mechanisms: inadequate adjacent-channel selectivity of the PAL television receivers; overloading of the receivers caused by the additional signals; generation of spurious sidebands within the DVB-T transmitters themselves. Work has already been carried out on the adjacent-channel performance of domestic PAL receivers: BBC R&D, for example, has carried out practical tests on receivers which were reported in an internal technical note (these tests are referred to at several points in this arti- cle). If the interfering DVB-T signal is “clean” or “ideal”, interference only becomes visible when its level exceeds that of the PAL signal. -
Hauppauge Introduces New Multi-Standard Tv Receiver
HAUPPAUGE INTRODUCES NEW MULTISTANDARD TV RECEIVER FOR WINDOWS AND LINUX WinTV‐HVR‐1975 supports seven different TV formats for over‐the‐air and digital cable TV in North America and Europe Hauppauge, New York February 26, 2014 – Hauppauge Computer Works Inc. has announced the WinTV-HVR-1975, a USB based TV receiver for Windows and Linux systems with multi-format TV support for both North American and Europe. The WinTV-HVR-1975 has built-in support for North America NTSC and European PAL TV, plus ATSC HD and clear QAM digital cable TV support in North America and DVB-T, DVB-T2 and DVB-C support in Europe. The WinTV-HVR-1975 is part of the WinTV-HVR-19XX family of high performance TV receivers. All models in the family have hardware video encoders which convert NTSC and PAL TV programs into MPEG-2, thereby reducing the CPU requirements of the host systems. “Our professional TV receiver customers have been looking for a universal TV tuner for Europe and North America, and the WinTV-HVR-1975 supports the most popular TV formats used in both regions. For example, the DVB-C TV format is used in many European countries for digital cable TV, and DVB-T2, the new high definition over-the-air broadcast format which started in the UK, is now spreading throughout Europe including Russia. Coupled with the support of NTSC, PAL, ATSC and DVB-T, the WinTV-HVR-1975 delivers a TV receiver which is as close to universal as possible” said Ken Plotkin, President of Hauppauge. -
16.1 Digital “Modes”
Contents 16.1 Digital “Modes” 16.5 Networking Modes 16.1.1 Symbols, Baud, Bits and Bandwidth 16.5.1 OSI Networking Model 16.1.2 Error Detection and Correction 16.5.2 Connected and Connectionless 16.1.3 Data Representations Protocols 16.1.4 Compression Techniques 16.5.3 The Terminal Node Controller (TNC) 16.1.5 Compression vs. Encryption 16.5.4 PACTOR-I 16.2 Unstructured Digital Modes 16.5.5 PACTOR-II 16.2.1 Radioteletype (RTTY) 16.5.6 PACTOR-III 16.2.2 PSK31 16.5.7 G-TOR 16.2.3 MFSK16 16.5.8 CLOVER-II 16.2.4 DominoEX 16.5.9 CLOVER-2000 16.2.5 THROB 16.5.10 WINMOR 16.2.6 MT63 16.5.11 Packet Radio 16.2.7 Olivia 16.5.12 APRS 16.3 Fuzzy Modes 16.5.13 Winlink 2000 16.3.1 Facsimile (fax) 16.5.14 D-STAR 16.3.2 Slow-Scan TV (SSTV) 16.5.15 P25 16.3.3 Hellschreiber, Feld-Hell or Hell 16.6 Digital Mode Table 16.4 Structured Digital Modes 16.7 Glossary 16.4.1 FSK441 16.8 References and Bibliography 16.4.2 JT6M 16.4.3 JT65 16.4.4 WSPR 16.4.5 HF Digital Voice 16.4.6 ALE Chapter 16 — CD-ROM Content Supplemental Files • Table of digital mode characteristics (section 16.6) • ASCII and ITA2 code tables • Varicode tables for PSK31, MFSK16 and DominoEX • Tips for using FreeDV HF digital voice software by Mel Whitten, KØPFX Chapter 16 Digital Modes There is a broad array of digital modes to service various needs with more coming. -
© Rohde & Schwarz; R&S®CA250 Bitstream Analysis
R&S®CA250 Bitstream Analysis Analysis and manipulation of signals at bitstream/ symbol stream level Product 06.00 Brochure Version | CA250_bro_en_5214-0618-12_v0600.indd 1 11.04.2019 10:10:45 By selectively using these tools, the user can obtain R&S®CA250 technical data from the unknown bitstream. This data pro- vides information about the type and content of the ana- lyzed signal. Ideally, it is possible to resolve all aspects of Bitstream Analysis the unknown code, thereby allowing the user to program a specific decoder for the unknown signal (e.g. by using the At a glance R&S®GX400ID decoder development environment). In the field of technical analysis of modern communications signals, the ability to analyze the characteristics of demodulated signals with unknown codings is of major importance. In addition to various symbol stream/bitstream representations, R&S®CA250 provides a large number of powerful analysis algorithms and bitstream manipulation functions. Operating window 2 CA250_bro_en_5214-0618-12_v0600.indd 2 11.04.2019 10:10:45 Versatile data import and symbol stream/bitstream R&S®CA250 representation ❙ Import of various symbol stream/bitstream formats ❙ Symbol-to-bit mapping and bitstream representation Bitstream Analysis as 0/1 and –/X representation as well as graphical visualization Benefits and ▷ page 4 Versatile bitstream analysis functions ❙ Structure analysis key features ❙ Statistical methods ▷ page 6 Advanced code analysis functions ❙ Automatic recognition of channel codings (convolutional, Reed-Solomon codes, etc.) -
Improved Television Systems: NTSC and Beyond
• Improved Television Systems: NTSC and Beyond By William F. Schreiber After a discussion ofthe limits to received image quality in NTSC and a excellent results. Demonstrations review of various proposals for improvement, it is concluded that the have been made showing good motion current system is capable ofsignificant increase in spatial and temporal rendition with very few frames per resolution. and that most of these improvements can be made in a second,2 elimination of interline flick er by up-conversion, 3 and improved compatible manner. Newly designed systems,for the sake ofmaximum separation of luminance and chromi utilization of channel capacity. should use many of the techniques nance by means of comb tilters. ~ proposedfor improving NTSC. such as high-rate cameras and displays, No doubt the most important ele but should use the component. rather than composite, technique for ment in creating interest in this sub color multiplexing. A preference is expressed for noncompatible new ject was the demonstration of the Jap systems, both for increased design flexibility and on the basis oflikely anese high-definition television consumer behaL'ior. Some sample systems are described that achieve system in 1981, a development that very high quality in the present 6-MHz channels, full "HDTV" at the took more than ten years.5 Orches CCIR rate of 216 Mbits/sec, or "better-than-35mm" at about 500 trated by NHK, with contributions Mbits/sec. Possibilities for even higher efficiency using motion compen from many Japanese companies, im sation are described. ages have been produced that are comparable to 35mm theater quality. -
Operation Manual
Operation Manual 1T-PAL-NTSC and 1T-PAL-NTSC-GL Standards Converters Table of Contents 1.0 Introduction 2 2.0 Specifications 3 3.0 Checking Package Contents 4 4.0 Connecting The Hardware 4 5.0 Operating The Unit 5 6.0 Troubleshooting 7 7.0 Limited Warranty 8 8.0 Regulatory Compliance 8 9.0 Contact Information 9 1.0 INTRODUCTION Thanks for purchasing this One-Task 1T-PAL-NTSC or 1T-PAL-NTSC-GL Standards Converter from TV One. The 1T-PAL-NTSC series of Standards Converters are designed to convert any of the widely used world television standard signals to any other widely used television standard plus perform frame synchronization and time base corrections to these signals as required. Our professional video conversion products have been serving the industry for over twenty years. TV One offers a full line of high quality Seamless Switchers, Video Scalers, Up/Down/Cross Converters, Analog-Digital Converters (SD/HD-SDI, HDMI, DVI), Format Converters, Standards Converters, TBC/Frame Synchronizers, Matrix Routing Switchers, Signal Distribution Amplifiers and Cat.5 Transmission Systems. 1.1 Liability Statement Every effort has been made to ensure that this product is free of errors. TV One cannot be held liable for the use of this hardware or any direct or indirect consequential damages arising from its use. It is the responsibility of the user of the hardware to check that it is suitable for his/her requirements and that it is installed correctly. All rights reserved. No parts of this manual may be reproduced or transmitted by any form or means electronic or mechanical, including photocopying, recording or by any information storage or retrieval system without the written consent of the publisher.