digital signal

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digital signal

61 links - and 2 categories

Operating Modes : Aircraft scatter
  • Airplane scattering - Operating on Airplane scattering. Scattering of radio signals by airplanes. An introduction to operating ariplane scattering, using aircraft to redirect RF that would otherwise be lost in space. Antenna Pointing, Doppler Shift/Digital Modes, using digital modes to operate airscatter.
    [ Hits: 153 | Votes: 0 | Rating: 0 ]
  • Virtual Radar from a Digital TV Dongle - Track aircraft by reprogramming an inexpensive digital TV USB stick to receive Automatic Dependent Surveillance-Broadcast signals.
    [ Hits: 136 | Votes: 1 | Rating: 2 ]
Operating Modes : Digital Modes
  • Digital Mode General Operating Tips - Start by getting your audio levels sorted out, Having your levels correct is critical to maximum effectiveness in both TX quality and also for being able to decode signals properly. Guide to Filters and other Rig Settings to optimize your output signal
    [ Hits: 183 | Votes: 1 | Rating: 9 ]
  • Soundcard Levels for Digital Modes - This article aims to help promote the proper configuration for having a clean signal on the waterfall to avoid interference to other users and also to vastly increase the effectiveness of your signal.
    [ Hits: 279 | Votes: 0 | Rating: 0 ]
Operating Modes : Digital Voice
  • FreeDV - Digital Voice for HF bands - FreeDV uses an audio codec as a software based modem to decode and encode the voice and text data from your computer. The data is encoded and then is transmitted over the HF radio using AF signals that can then in turn be decoded by the receiving station.
    [ Hits: 91 | Votes: 0 | Rating: 0 ]
Operating Modes : JT9
  • Have a Great Time with JT9 - JT9 is a amateur radio weak-signal digital mode can give little pistol stations big gun results, ARRL article by W4GAL
    [ Hits: 448 | Votes: 0 | Rating: 0 ]
Operating Modes : Weak Signal
  • JT65A - weak-signal digital mode - A very exaustive and complete article on JT65A and JT65-HF operating mode, including software download links, installation notes, how to make JT65A QSO and videos to correctly work with weak signals by NW7US
    [ Hits: 669 | Votes: 2 | Rating: 10 ]
  • WSPRnet - A forum dedicated to WSPR. The Weak Signal Propagation Reporter Network is a group of amateur radio operators using K1JT's MEPT_JT digital mode to probe radio frequency propagation condition
    [ Hits: 375 | Votes: 1 | Rating: 10 ]
  • Weak Signals - Reduce volume to reduce noise - This article discusses how volume reduction can help in the reception of weak signals by reducing the noise level. It is commonly known that reducing the volume also reduces the background noise, and especially in the reception of weak digital signals it can be beneficial
    [ Hits: 228 | Votes: 1 | Rating: 10 ]
Radio Equipment : HF Transceivers : Yaesu FT-817
  • Digital Modes with Yaesu FT-817 - Setting up the Yaesu FT-817 and Signalink for data mode communication. Hardware and software required for data mode communication, connect and configure FT-817 and Signalink
    [ Hits: 58 | Votes: 0 | Rating: 0 ]
Software : Android
  • Wavesink - Wavesink Plus is an Android based RTL-SDR receiver app with a free trial and paid full version, can decoding DAB+ and DRM+ digital radio signals.
    [ Hits: 634 | Votes: 1 | Rating: 7 ]
Software : Decoders
  • Digital Speech Decoder - MUlti mode digital signal decoder software capable or C4FM D-Star decoding, a guide to compile and install DSD
    [ Hits: 1038 | Votes: 2 | Rating: 5 ]
  • Wavecom W-CODE - W-CODE is a professional digital mode decoder system capable to decode many digital signals on HF, VHF/UHF, SHF and SATELLITE bands.
    [ Hits: 440 | Votes: 1 | Rating: 10 ]
Software : JT65
  • WSJT-X Download Page - WSJT-X - Weak Signal Communication, by K1JT - offers specific digital protocols optimized for EME (moonbounce), meteor scatter, and ionospheric scatter, at VHF/UHF, as well as for LF, MF, and HF propagation. The program can decode fraction-of-a-second signals reflected from ionized meteor trails and steady signals more than 10 dB below the audible threshold. WSJT-X incorporates nearly all popular capabilities of programs WSJT and WSPR, while adding comprehensive rig control and many other features. Open-source, download latest version for Windows, Linux, Macintosh OS X.
    [ Hits: 8698 | Votes: 50 | Rating: 7.1 ]
Software : Macintosh
  • JTDX - JTDX (JT Digital Modes for Linux, MacOS and Windows) is a free, open-source software for amateur radio operators for the reception and transmission of digital modes, including JT65, JT9, and FT8, among others. JTDX is designed to provide improved decoding of weak signals and better usability compared to other digital mode software like WSJT-X. It also has features like a real-time spectrum display, logging, and decoded message storage and retrieval. Download JTDX from the official site.
    [ Hits: 3259 | Votes: 6 | Rating: 8.17 ]
Software : Software Defined Radio
  • SoDiRa - Windows Software Defined Radio SDR for analogue and digital modulation types. Can decode AM and FM+RDS radio as well as DRM/DRM+ and time signals DCF77/HBG. Sodira supports the use of the RTL-SDR through use of the ExtIO_RTL2832.dll module. Demo version available.
    [ Hits: 1543 | Votes: 10 | Rating: 7.8 ]
Software : Weak Signal
  • MSHV - MSHV is a free windows and linux multimode software that support weak signal digital modes like MSK144 MSKMS JTMS FSK441 FSK315 ISCAT JT6M FT8 FT4 JT65 PI4 amateur radio modes. MSHV features several interesting features including the Multi Answering Auto Seq Protocol, allowing multiple signal transmissions to be used during dx peditions.
    [ Hits: 1322 | Votes: 6 | Rating: 8.5 ]
Technical Reference : Arduino
  • Signal Processing on the Arduino - Expeimenting with DSP digital signal processing on Arduino
    [ Hits: 985 | Votes: 3 | Rating: 8.33 ]
  • Universal HF Tracker - The PCB can produce a High Frequency RF signal in the range of 1MHz to 12.5MHz using an AD9833 Direct Digital Sequence (DDS) frequency synthesizer. The signal can be modulated with different Weak Signal modes such as WSPR, JT9 and JT65 using our Arduino 5V/16MHz Pro Micro software.
    [ Hits: 140 | Votes: 0 | Rating: 0 ]
Technical Reference : Test Equipment : RF Sweep Generator
  • RF Sweep Generator - Notes about generating RF sweep signals on the Arduino for filter testing, a digital version of the old Wobbulator concept
    [ Hits: 854 | Votes: 0 | Rating: 0 ]

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