This page contains material that forms part of the Essex Ham Foundation Online training course, and is intended for those studying using our online course.
Foundation Licence Manual section:
Refer to pages 9 to 11 of the Foundation Licence Manual
Video Material:
The following video covers all of the material in this module. You can view the video from this web page, or download the video to your computer or smartphone. We’d ask that you don’t share the video on social media, to prevent out-of-date versions being circulated.
YouTube Version
You can make the video full-screen by clicking the square icon in the video’s bottom-right.
Local Version
Want to download a copy of this video to view without an Internet connection?
Right-click to Save the video: Foundation Online – Transmitters & Receivers Video
PowerPoint Slides
See “3. Transmitters & Receivers” here: Foundation Online Slides
Please review the material for this module, then work through the first module in the online classroom. There will be a short quiz at the end of this module.
More: Foundation Online Course
Our FREE online courses run at least once a month and last for 3 weeks. Next Start Dates:
Another good video – I have been messing around with electronics and radios trying to learn, and although I understood that modulation was part of a radio circuit, this video really made it click for me. Modulation mixes radio and audio signals….demodulation undoes that process the other end. I tried a mock exam a week ago and got stuck on the block diagram – so it shows that this stuff will come up in the exam! really helpful – thanks
That’s great feedback – really appreciated Ben!
Modulation diagrams and a lightbulb moment for me!
I began to wonder about the need for the carrier frequency… Why not just send the amplified audio signal directly? After a little thought… Of course! … The audio signal will be a complex mixture of frequencies and amplitudes. The receiver would have nothing to “lock” on to and all the many received signals would in any case be jumbled up. The carrier frequency allows them to distinguished, the signal of interest to be retained, stripped of the carrier and amplified, whilst the other signals on different carrier frequencies are discarded.
Hi Chris,
When I was studying a few years back, my trainer descibed this as the carrier being the constant, and the audio just being carried along for the ride. You’ll learn more about this at Intermediate, but for Foundation, that lightbulb moment will serve you well.
Pete
Enjoying the modules with some real good links
Thankyou
Really enjoying the modules, very good learning tool. I just hope I remember evrything on my exam 73’s Rob
i think im slowly beggining to understand the world of radio waves and things but im not there yet but the more i watch and listen the more i learn .enjoying the course so far hope to make it to the end
..73,s
going over the mods again just so i get the hang of it
excellent help, as are all your videos and content
really enjoying the modules. a lot to take in but worth learning about
I found that Module 3 takes time to get your head around. Will have to review Pete.