audio digital

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audio digital

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Manufacturers : Interfaces
  • Digirig Mobile - Digirig is an open-source integrated digital modes interface for amateur radio. As a differentiating feature, Digirig only requires a single USB connection to the computer with all the digital goodness packed in a single small enclosure. The internals include a USB hub, audio codec, a fully featured serial CAT (Computer Aided Transceiver) interface, and potentially other modules such as GPS receiver for time synchronization.
    [ Hits: 148 | 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 ]
  • Ribbit digital text messaging mode for HF/VHF/UHF - Ribbit is a novel digital text messaging mode for VHF/UHF communications for recreational and emergency use which radically increases the density of information transmitted by spectrum used. It leverages the computing power of the modern smartphone to increase the capabilities of any Handy Talkie without requiring any additional hardware or cable. A Ribbit message is fixed in duration at 1250 milliseconds. It is sent over audio modulation with a 2kHz bandwidth centered on 1.5kHz. It is preceded by 400ms of white noise to open analog squelch circuits.
    [ Hits: 132 | Votes: 1 | Rating: 10 ]
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 : FT8
  • Optimizing TX/RX Levels in WSJT-X - Exploring digital radio modes, the author rethinks how to adjust transmit and receive levels in WSJT-X. Despite effective communication using Yaesu's settings, a new procedure aims for better performance. For RX, set audio device levels to 100%, disable AGC, and adjust RF gain. For TX, enable "Remember power settings" and adjust power output to avoid ALC engagement. This method ensures reliable communication without signal degradation, enhancing dynamic range and minimizing noise.
    [ Hits: 47 | Votes: 0 | Rating: 0 ]
Operating Modes : Portable Operations
  • Portable Operating Tips for Ham Radios - This article is from the book Ham Radio For Dummies and features some tips for portable amateur radio operations, on Field Day or generic outdoor operation, like selecting the proper antenna and portable power.
    [ Hits: 79 | Votes: 1 | Rating: 10 ]
Radio Equipment : HF Transceivers : Icom IC-705
  • IC-705 completely cordless digital ham radio - The IC-705 has a built-in server to to send and receive audio and radio control via WLAN. This allows the IC-705 to be connected directly to the user’s computer without the need for an additional server computer. Perfect to run e.g. digital operation modes completely cordless.
    [ Hits: 143 | Votes: 0 | Rating: 0 ]
Software : Macintosh
  • xCAT xDAX for macOSX and FlexRadio 6000 - xCAT is an helper application for the FlexRadio 6000 series running on macOS computers to control via CAT protocol tranceivers, while xDAX purpose is to provide a way for Digital Mode Software like Fldigi, WSJT-X to access the digital audio data (DAX) of the FlexRadioTM
    [ Hits: 194 | Votes: 0 | Rating: 0 ]
Technical Reference : Sound Card Radio Interfacing
  • Optocoupled Transceiver-PC Audio Isolator project - An optocoupled audio interface between PC and Transceiver for digital modes. The article includes full schematic of complete board and build instructions.
    [ Hits: 197 | Votes: 0 | Rating: 0 ]
  • Apple MacBook interface for digital modes - How to make a custom Line In connector for apple macbook or iMac to connect your amatur radio transceiver. A simple modification of a standard USB audio interface can work.
    [ Hits: 135 | Votes: 0 | Rating: 0 ]
  • USB Rig Interface - This project is a USB Audio, Serial and PTT interface for rigs that does not directly support digital modes provided by applications such as FLDIGI, WSJT-X and JS8CALL. Plug these interface devices into your Windows or Linux laptop or Raspbian Raspberry Pi and you can send and receive digital tones to/from your rig and automate the frequency and mode control and PTT control.
    [ Hits: 319 | Votes: 1 | Rating: 1 ]
  • AnyRig A Flexible Digital Mode Interface - This project uses an inexpensive Teensy microcontroller as the core of a flexible interface that provides a high-fidelity sound card and VOX functions for controlling the radio.The interface firmware supports variable VOX delay, CW and RTTY keying via audio (such as is available from Fldigi), and RTS and DTR control of any keying function, all via a single USB connection to the PC.
    [ Hits: 140 | Votes: 0 | Rating: 0 ]

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