Introduction In the previous posts I looked at MSK144 and FSK441 which are WSJT-X/WSJT digital communications protocols or so called “fast modes” used for Meteor Scatter. In this post I will look at FT8 (Ref.1 & Ref.2) which is part of the WSJT-X series of protocols used for weak signal communication over all the HF/VHF… Continue reading WSJT-X FT8 Modulator – Scicos Simulation
AIS GMSK Modulator – Scicos Simulation
Introduction AIS Automatic Identification System for Ships is a traffic system that uses VHF transponders on vessels to periodically send out location information. It was developed by Swedish inventor Hakan Lans and is similar in concept to the ADS-B transponder system used on aircraft for position reporting. AIS uses two VHF marine channels 87B (161.975 MHz)… Continue reading AIS GMSK Modulator – Scicos Simulation
AM Modulator – Arbitrary Waveform Generator
In the previous post I showed how we can create an AM Modulator with ScicosLab/Scicos. In this post we can use this file to create a .CSV file that can be used to drive an Arbitrary Waveform Generator so it can test equipment in our lab as required. Traditionally Function Generators only produced Sine, Square… Continue reading AM Modulator – Arbitrary Waveform Generator
ScicosLab & Scicos – AM Modulator
ScicosLab/Scicos is an Open Source Math Program that can be used in various engineering and scientific applications. In this post I look at how an AM Modulator can be built using the Editor in ScicosLab and also with the visual block Editor Scicos with the Modnum Toolbox. Video ScicosLab/Scicos – AM Modulator Download “Learn Telecommunications… Continue reading ScicosLab & Scicos – AM Modulator
VOACAP – CHU to VE3PKC+
In a previous post Ref.1 I looked at VOACAP and it’s use in a simple off air receive situation. In this post I will delve a little further into the software and compare the results against some simple mathematical models. VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software… Continue reading VOACAP – CHU to VE3PKC+