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WSJT-X is a computer program used for weak-signal radio communication between amateur radio operators.The program was initially written by Joe Taylor, K1JT, but is now open source and is developed by a small team.
A waterfall display showing FT8 in use on the 40-meter band.. FT8 (short for Franke-Taylor design, 8-FSK modulation) is a frequency shift keying digital mode of radio communication used by amateur radio operators worldwide.
The Pratt & Whitney GG4 and FT4 are related aero-derivative gas turbine engines developed from the Pratt & Whitney J75/JT4 turbojet line. [1] [2] See also
User's guide for a Dulcitone keyboard. A user guide, also commonly known as a user manual, is intended to assist users in using a particular product, service or application. It is usually written by a technician, product developer, or a company's customer service staff. Most user guides contain both a written guide and associated images.
Amateur licensing is a routine civil administrative matter in many countries. Amateurs therein must pass an examination to demonstrate technical knowledge, operating competence, and awareness of legal and regulatory requirements, in order to avoid interfering with other amateurs and other radio services. [36]
Pratt & Whitney GG4/FT4 The Pratt & Whitney J75 (civilian designation: JT4A ) is an axial-flow turbojet engine first flown in 1955. A two-spool design in the 17,000 lbf (76 kN) thrust class, the J75 was essentially the bigger brother of the Pratt & Whitney J57 (JT3C).
The operations manual is intended to remind employees of how to do their job. The manual is either a book or folder of printed documents containing the standard operating procedures, a description of the organisational hierarchy, contact details for key personnel and emergency procedures.
ext4 (fourth extended filesystem) is a journaling file system for Linux, developed as the successor to ext3.. ext4 was initially a series of backward-compatible extensions to ext3, many of them originally developed by Cluster File Systems for the Lustre file system between 2003 and 2006, meant to extend storage limits and add other performance improvements. [4]