audio signal

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audio signal

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Manufacturers : Software Defined Radio
  • SoftRock-40 - The SoftRock-40 is a small, low-cost, good-performing "software defined radio" receiver that plugs into a computer USB port and delivers I-Q audio signals to the computer's sound card. It was designed by Tony Parks, KB9YIG and Bill Tracey, KD5TFD as an "SDR sampler project" for hams everywhere to easily try out software defined radio.
    [ Hits: 8538 | Votes: 9 | Rating: 7 ]
Propagation : Long-Delayed Echoes
  • Unusual HF Propagation Phenomena - This page has a collection of audio samples from unusual HF propagation phenomena, from round-the-world propagation to moonbounced signals , and to ducted transmission.
    [ Hits: 506 | Votes: 0 | Rating: 0 ]
Shortwave Radio : BCL Resources
  • Interval Signals Library - Collection of audio clips of foreign radio stations, with identification announcements in various languages, signature tunes and jingles, and of course interval signals
    [ Hits: 1190 | Votes: 13 | Rating: 6.16 ]
  • Interval Signals Archive - Large collection of audio clips of foreign radio stations, with identification announcements in various languages, signature tunes and jingles, and of course interval signals.
    [ Hits: 2173 | Votes: 15 | Rating: 6.34 ]
Software : Audio Recorders
  • Scanrec Scanner Recorder - Scanner Recorder (Scanrec) is a free audio recorder that is primarily designed to record speech. It has a VOX control that allows the user to save disk space when no sound is present in the signal. Since FM communications has such an effective squelch, the recorder works best with FM. HF ham bands and World Band radio have such a poor signal to noise ratio that the VOX gate on Scanrec might not be very easy to set.
    [ Hits: 15513 | Votes: 53 | Rating: 6.82 ]
  • Vox Recorder  pop - Vox Recorder is a Windows utility wich allows recording sound from an audio source only when an audio signal is present; its main purpose is to avoid the recording of the silence eventually present at the input. Vox Recorder has been designed in particular for radio-scanner hobbists.
    [ Hits: 45519 | Votes: 131 | Rating: 6.47 ]
Software : Beacon Monitoring
  • BeaconSee - BeaconSee shows you, in real time, worldwide HF band openings on your PC. Analyses the audio signals from your radio, which is tuned to the NCDXF IARU HF beacon network and shows you the signal strength received from each of the 18 beacon transmitters as a plot of frequency spectrum against time.
    [ Hits: 7239 | Votes: 13 | Rating: 7.61 ]
Software : DSP
  • Voice Shaper - Voice Shaper is a freeware windows speech pre-processor for SSB transceivers. It receives the voice signal from the microphone connected to the soundcard, and sends the processed audio back to the soundcard in real time by Alex Shovkoplyas, VE3NEA
    [ Hits: 5946 | Votes: 7 | Rating: 7.43 ]
  • WD6CNF DSP Filter - Audio Digital Filter, two bandpass filters, three notch filters, two noise filters graphical setting of filter center frequency and bandwidth Drag vertical lines on top of signal, Microphone input, speaker output Mono, 5 kHz bandwidth
    [ Hits: 4899 | Votes: 2 | Rating: 10 ]
Software : Hellschreiber
  • Spectran - Program designed to do spectral analysis and real-time audio filtering on reception of audio signals for EME, VLF, SETI applications. Offer support for MTHELL, QRSS, DFCW, NDB, WSJT by I2PHD
    [ Hits: 5922 | Votes: 11 | Rating: 8.55 ]
Software : PSK31
  • RX-PSK31 - Easy to use Audio Spectrum and PSK31 decoding program specially designed for SWL's who don't need TX or for anyone who just like to monitor PSK31 or analyse signals. Adjustable DSP and Spectrum settings for audio and frequency spectrum to set for best decoding of PSK31.
    [ Hits: 3109 | Votes: 12 | Rating: 7.41 ]
  • RX-PSK31 - Easy to use Audio Spectrum- and PSK31 decoding program specially designed for SWL's who don't need TX or for anyone who just like to monitor PSK31 or analyse signals. Adjustable DSP and Spectrum settings for audio and frequency spectrum analasys or to set it for best decoding of PSK31 signals. By ON6MU
    [ Hits: 2959 | Votes: 2 | Rating: 10 ]
Software : Signal Generator
  • TCube - TCUBE is a combination of a Spectrum Analyzer and a Two Tone Generator, with optional quadrature outputs. It can be used for measuring the intermodulation behavior of an audio circuit, and as a general purpose tool
    [ Hits: 8513 | Votes: 11 | Rating: 5.91 ]
Software : Spectrum analyzers
  • Analyzer2000  pop - Superfast analyzer for audio and radio signals. Examining radio signals is the original idea of Analyzer2000. Simply connect the AF-output of your receiver to the input of your soundcard and see, what you hear. Use SSB and you will have a feeling like using an expensive IF panorama adapter. Support for this version has been discontinued.
    [ Hits: 106813 | Votes: 47 | Rating: 5.83 ]
Software : Voice tools
  • Vox Actuated Recorder for Windows - Vox Recorder is a Windows utility wich allows recording sound from an audio source only when an audio signal is present; its main purpose is to avoid the recording of the silence eventually present at the input.
    [ Hits: 3061 | Votes: 11 | Rating: 7.02 ]
Software : Weak Signal
  • FFTDSP - FFTDSP is a PC program which can detect weak radio signals in real time. Uses the PC's soundcard and advanced signal processing techniques, extracts and displays weak signals from the receiver audio.
    [ Hits: 20325 | Votes: 9 | Rating: 4.78 ]
  • HamView - A freeware program to dig out weak signals buried in noise, functionally similar to the excellent FFTDSP of AF9Y, but with the added bonus of real time audio filtering of the incoming signals. Just point and click with the mouse, and the selected signal will stand out from the QRM and noise.
    [ Hits: 7559 | Votes: 3 | Rating: 5 ]
Technical Reference : Audio
  • Audio Preamp - Easy circuit that provide good gain to weak audio signals
    [ Hits: 3818 | Votes: 2 | Rating: 3.5 ]
Technical Reference : HF Radios
  • QST signalink review - SL-1 - Designed to handle audio signal interfacing as well as transmit/receive switching Reviewed by Steve Ford, WB8IM
    [ Hits: 654 | Votes: 0 | Rating: 0 ]
Technical Reference : Headsets and Speakers

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