- Digital DX Live
- DX Spots of digital emissions
[ Hits: 2313 | Votes: 6 | Rating: 4.67 ]
- Analyzing UHF signals using FFT programs
- With spectrum analysis of beacon signals, it's possible to see features relating to various propagation phenomonen.
[ Hits: 778 | Votes: 0 | Rating: 0 ]
- Chip64 documentation
- Nino porcino documentation about CHIP64 digital mode
[ Hits: 1153 | Votes: 0 | Rating: 0 ]
- Clover
- Clover technical specifications, digital communications mode that conveys 8-bit digital data over narrow-band high-frequency radio.
[ Hits: 915 | Votes: 1 | Rating: 10 ]
- Clover 2000
- CLOVER-2000 is a faster version of CLOVER (about four times faster) that uses eight tone pulses, each of which is 250 Hz wide, spaced at 250-Hz centers, contained within a 2 kHz bandwidth between 500 and 2,500 Hz
[ Hits: 845 | Votes: 1 | Rating: 1 ]
- CMSK
- CMSK is a narrow-band weak signal digital mode for LF and MF ham radio bands defined by ZL2AFP. CMSK63 is the windows client program.
[ Hits: 814 | Votes: 3 | Rating: 6.33 ]
- Digital Modes used in Ham Radio
- Article with waterfall pictures and samples of several digital modes like psk31, sstv packet pactor hellschreiber domino thor jt65 and more
[ Hits: 1122 | Votes: 3 | Rating: 7.67 ]
- Digital signal processing
- Frequently asked questions on Digital Signal Processing
[ Hits: 2587 | Votes: 3 | Rating: 5.67 ]
- Digital Signals Sounds
- Several files with examples of sounds from digital radio modes on short wave. PSK, RTTY Hellschreiber MFSK FSK Sitor
[ Hits: 1599 | Votes: 6 | Rating: 5.17 ]
- Domino
- Domino is the name given by the developers to a family of IFK coded coherent phase single tone MFSK keyed modes, using sequential tone-pairs in two alternate fields arranged as orthogonal but interleaved tone sets.
[ Hits: 728 | Votes: 1 | Rating: 10 ]
- Domino DF mode
- DOMINO DF is a sensitive mode which, due to its incremental frequency keying and thanks to its interleaved multiple tones sets, is easy to tune and is few sensitive to interference and ionospheric effects.
Domino faeture a great signal to noise ratio.
[ Hits: 213 | Votes: 0 | Rating: 0 ]
- DRM mode Ham specifications
- This document describes the DIFFERENCE of mode HAM to the official broadcast DRM standard
[ Hits: 1311 | Votes: 0 | Rating: 0 ]
- EA8ATE Sergio
- Greetins from Gran Canaria, Canary Island, includes many information and video about digital modes, in spanish
[ Hits: 582 | Votes: 1 | Rating: 6 ]
- G-tor
- G-TOR is a trademark of Kantronics, Inc. G-TOR (Golay-Teleprinting Over Radio) can be viewed, in part, as a variant of the Automatic Link Establishment (ALE) protocol, outlined in MIL-STD-188-141A.
[ Hits: 550 | Votes: 0 | Rating: 0 ]
- Ham radio digital modes
- An introduction to PSK31, MT63, and Hellschreiber, John DeGood NU3E
Trenton Computer Festival in PDF
[ Hits: 3554 | Votes: 4 | Rating: 8.25 ]
- HF-FAX
- The home of Radio Facsimile wefax & SSTV.
[ Hits: 9494 | Votes: 24 | Rating: 8 ]
- Mfsk
- MFSK is an easy-to-use chat mode for real-time amateur contacts, nets and bulletin transmissions, but not intended for contesting or Bulletin Board System (BBS) use. It is a half-duplex non-Automatic Repeat ReQuest (ARQ) forward-error-correcting (FEC) mode. It performs well on long-path fading conditions and in the presence of interference
[ Hits: 984 | Votes: 0 | Rating: 0 ]
- Mfsk
- MFSK is an easy-to-use chat mode for real-time amateur contacts, nets and bulletin transmissions, but not intended for contesting or Bulletin Board System (BBS) use. It is a half-duplex non-Automatic Repeat ReQuest (ARQ) forward-error-correcting (FEC) mode. It performs well on long-path fading conditions and in the presence of interference
[ Hits: 489 | Votes: 0 | Rating: 0 ]
- Mt-63 technical description
- The MT-63 modem, constructed around a high speed DSP processor, either in a dedicated external DSP unit like the Motorola EVM, or in PC software using the PC sound card, transmits 64 tones spaced 15.625 Hz apart, in the 1 kHz bandwidth.
[ Hits: 618 | Votes: 0 | Rating: 0 ]
- Noise canceling DSP for ham radio FT817
- Noise canceling DSP for ham radio good for Icom, Yaeu, Kenwood and any kind of radio
[ Hits: 453 | Votes: 19 | Rating: 9.75 ]
- Olivia
- The Olivia transmission system is constructed of two layers: the lower, modulation layer is an (almost) classical Multi-Frequency Shift Keying (MFSK) and the higher layer is a Forward Error-Correcting (FEC) code based on Walsh functions.
[ Hits: 1458 | Votes: 1 | Rating: 3 ]
- OLIVIADATA Group
- OliviaData the OLIVIA Yahoo group ham radio
[ Hits: 429 | Votes: 0 | Rating: 0 ]
- Pactor
- PACTOR can be viewed as a combination of two earlier digital modes, packet radio and AMateur Teleprinting Over Radio (AMTOR). PACTOR provides improved throughput because its transmission speed adapts to the quality of the link and it uses Huffman compressed characters.
[ Hits: 668 | Votes: 0 | Rating: 0 ]
- Pactor ii
- PACTOR-II is a fully backward-compatible improvement to the original PACTOR system. It is an adaptive mode that applies different modulation and encoding methods depending on the channel quality.
[ Hits: 643 | Votes: 0 | Rating: 0 ]
- Pactor III
- PACTOR-III is a software upgrade for existing PACTOR-II modems that provides a new data transmission mode for improved speed and robustness. PACTOR-III is not a new modem or hardware device. Most current PACTOR-II modems are upgradeable to use PACTOR-III via a software update since PACTOR-II firmware accommodates the new PACTOR-III software
[ Hits: 846 | Votes: 2 | Rating: 10 ]
- Psk31
- PSK31 is a digital communications mode which is intended for live keyboard-to-keyboard conversations, similar to radioteletype. Its data rate is 31.25 bauds (about 50 word-per-minute), and its narrow bandwidth (approximately 60 Hz at -26 dB) reduces its susceptibility to noise.
[ Hits: 1433 | Votes: 1 | Rating: 10 ]
- PSK63
- A super-fast PSK mode for RTTY Contesting, 100 wpm character transmission speed for contest exchanges and macro transmission versus RTTY at 60 wpm
[ Hits: 1738 | Votes: 1 | Rating: 10 ]
- Q15X25
- Q15X25 is a packet modem with a KISS/AX.25 interface designed for HF transmission of AX.25 packets and TCP/IP using Automatic Repeat reQuest (ARQ) and forward error correction (FEC).
[ Hits: 693 | Votes: 1 | Rating: 1 ]
- Recommended frequencies for digital modes
- Active digital mode frequency list compiled by Jason Buchanan - N1SU
[ Hits: 4032 | Votes: 6 | Rating: 4.67 ]
- Sound samples of digital transmissions
- Sound samples of the transmission modes recorded at 11025 samples per second, mono and the message in all of the samples is the same: "the quick brown fox jumps over the lazy dog 1234567890".
[ Hits: 3180 | Votes: 8 | Rating: 8.75 ]
- WinMor
- A new HF transmission protocol for Winlink 2000
[ Hits: 903 | Votes: 2 | Rating: 10 ]
