- Clover technical specifications, digital communications mode
that conveys 8-bit digital data over narrow-band high-frequency radio.
- Domino is the name given by the developers to a family of IFK coded coherent phase single tone MFSK keyed mode
s, using sequential tone-pairs in two alternate fields arranged as orthogonal but interleaved tone sets.
Mt-63 technical description
- The MT-63 mode
m, 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.
- 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
- PACTOR can be viewed as a combination of two earlier digital mode
s, 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.
- 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.
- PACTOR-III is a software upgrade for existing PACTOR-II mode
ms that provides a new data transmission mode
for improved speed and robustness. PACTOR-III is not a new mode
m or hardware device. Most current PACTOR-II mode
ms are upgradeable to use PACTOR-III via a software update since PACTOR-II firmware accommodates the new PACTOR-III software
- 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.
- Q15X25 is a packet mode
m 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).