transmission

transmission

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• Transmission Lines - Whenever you choose a coax feedline, the frequency of operation is a very important consideration. Over the operating bandwidth of the coax the VSWR is low, typically 1.2:1 or better. Insertion loss is also an important parameter. It is usually specified in dB/foot and is a linear relationship.
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• Transmission lines for dummies - Myths and basic truths on transmission lines
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• Auckland ATV Group - The ATV User's Group is a subgroup of the Auckland VHF Group, Club call ZL1BQ, compromising of persons interested in the transmission and reception of Amateur Television
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• Radio Audio and sound files - Some tens of very special audio files recorded during amateur radio activities like aurora traffic, meteor scatter, communications with ISS crew and the sound of various transmission modes that you can hear on HF and VHF bands
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• KEYCOM Characteristic Technologies - Millimeterwave/Microwave transmission lines and components, Cryogenic temperature application transmission cables and systems, Permittivity(Dielectric rate) and Permeabillity measurement systems, Antennas, Radar systems
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• Low Power Radio Modules - Low power radio modules - supplying rf modules, rf transceivers, radiometrix transmitters receivers, low power radio modules, scada, frequency hopping, 900 mhz, wireless data transmission, data telemetry, gps modules & receivers and more
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• 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
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• 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
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• Automatic Picture Transmission - Automatic Picture Transmission (APT) is used by Satellites to enable a fully automated unattended reception of the transmitted pictures.
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• Frequencies for wefax - Where wefax transmission can be heard. Listen to weather fax transmissions world wide.
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• 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.
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• HRPT - NOAA HRPT - High Rate Picture Transmission, the main source of high quality data from polar orbiting meteorological satellites
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• Introduction to Spy Numbers Transmissions - Introduction to Spy Numbers Transmissions and numbers stations with reference of most popular decoders working groups
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• Listen to the world - List of English language transmissions - Sohl List of English language transmissions
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• Acarsd - acarsd is an ACARS decoder for a LINUX or Windows PC which attempts to decode ACARS transmissions in real-time using up to three Soundcards. acarsd is also a realtime ACARS Server, for the worldwide spotter and ACARS community.
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• Smith Chart Software - SimSmith is a highly interactive, real time Smith chart graphing program. Circuits are constructed using drag-n-drop. Load files can be imported from the EZNEC and CocoaNEC antenna simulation software and from the AIM4170 and miniVNApro antenna analyzers. Circuits and load files can be of any size. Key Features: SimSmith is one of the few Smith chart packages which models transmission line losses. SimSmith also allows the description of circuit elements using algebraic equations. SimSmith has only one screen and allows the screen to be resized to increase workspace or readability.
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• TLE for windows - Transmission Line equations for Windows. Written in Visual C++. This program provides the most comprehensive analysis of a transmission line by w9dmk
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• Coaxial Cable & Power Handling - This calculator can be used to estimate the attenuation (dB loss), power handling capability, and transmission efficiency for some of the more popular Wireless Communications and MIL Spec cables at the frequency of interest
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• RF Coaxial Connectors - RF coax(ial) connectors are a vital link in the radio spectrum. Coax connectors are often used to interface two units such as the antenna to a transmission line, a receiver or a transmitter. The proper choice of a coax connector will facilitate this interface.
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• Are you ready for BPL - Broadband over power lines (BPL) is a technique for transmission of high speed data (broadband Internet) over powerlines. Access BPL technology injects radio frequency energy into powerlines which were not designed for transmission of radio frequency energy, and leak substantial energy that causes interference to radiocommunications service
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