signal analysis

2 Meter Vertical Mobile Antenna - Mobile vertical antenna for 144 MHz suitable for satellite signals reception by K5OE

Gamma Match Article - A working analysis of the gamma-match problem that gives usefull practical results. New light on the question of when it will and when it won't give a perfect match to the coaxial transmission line.

CQWW Analyzer - CQWW Contest data analyzer show volume of contacts by band per each zone require Flash by EI6DX

Beacon Signals.com Priority listing - Covering all areas of beacon signals including radio beacons and beacon technology. Access free beacon recordings and graphs using Spectrum Lab, SpectraVue, and CW Skimmer.

SWOT Radio Club - 2-Meter Weak-Signal Enthusiasts

How To Make A VO-52 SAT QSO Video - Using a home made 10 element 435 & IO Loop for 145MHz, with a Yaesu FT-847. Simon - 2E0HTS, adjusts his (uplink) transmitted signal to correct the doppler of the Received (downlink) frequency.

ASC Signal - Global manufacturer of Satellite Earth Station, Air Traffic Control Radar Antenna and High Frequency Antenna products for broadcast, government and enterprise satellite communication applications.

Listing of Q Signals - Miscellaneous abbreviations and signals to be used in radiotelegraphy communications except in the maritime mobile service

Analyzing UHF signals using FFT programs - With spectrum analysis of beacon signals, it's possible to see features relating to various propagation phenomonen.

JT6M.org - The purpose of this web site is to promote JT6M as a mode of communication on both 6M and 4M band and guide users through setting up and using JT6M effectively. Optimised for 6 metre band Meteor Scatter, JT6M allows you to make meteor scatter contacts easily. JT6M is part of the WSJT suite of digital weak signal software applications developed by Joe Taylor, K1JT

Long delayed echoes in EME - The following discussion about the long delayed echoes (LDE's) on the EME signals

Magnetospheric ducting as LDE cause - LA3ZA on magnetospheric ducting as an explanation for delayed signals on 3.5 MHz

Here Comes the Sun - Propagation and Sun - Solar activity can aid or hamper HF propagation beyond line-of-sight range, WA1SVF and N6BV answers to questions about Sun influence on radio signals propagation

Ten-Tec Orion 9 MHz IF Output - This article describe hot extract a wideband 9 MHz IF sample signal from a Ten-Tec Orion model 565 by VE7TK

N3UJJ Antenna Analysis of Gap Titan - Analysis of N3UJJ installed antennas using the AIM4170b Antenna Analyzer

Dynamic range measurements - Comparison of FT-1000D FT-736R FT-817 FT-847 FT-897 IC-765 Orion TS-2000 Spectral purity of a continous carrier, of a SSB and CW signals

MiniDSP - MiniDSP is a platform for digital audio signal processing applications. Manufacture low cost digital signal processor kits for the DIY/OEM market. Our flexible audio platforms are software controlled and easily upgradeable.

Windipoles - Windipoles is a free passive filter simulator. It is a Windows .NET executable, so no software installation is required. It enables design, analysis, optimizations and plots, all graphically.

VOAProp - VOAProp shows you typical propagation for a given hour of the day during a given month. The propagation is shown as expected signal strengths to be received from different parts of the world, plotted on a world map. Windows freeware by G4ILO

WSCGen - Signal generator using the PC soundcard to output continuous tone, CW, SSTV, AO-40 telemetry, and PSK31 test signals with variable AWGN. The program will also output to a RIFF .wav file by AE4JY

No More Splatter - Improving your own signal quality by GM3SEK

Using Band-Pass Filters - Clean Up Your Signals with Band-Pass Filters

A Simple Dual Band SSB Transceiver - Homebrew a dual-band transceiver with a crisp receiver and a clean SSB signal

Power Supply Analysis - This article explains how a linear power supply works, QST Article

Receiver Dynamic Range - Receiver dynamic range is the ability of a receiver to receive a weak signal without loss of readability while a strong signal is present.