Posts Tagged ‘transmission modes’

What Mode Is That?

'JT-9' - courtesy:

A recent link posted on the ON4KST 2200/630m chat page brought up a very helpful web site.

The  Sigidwiki site lists examples of the various transmission modes being used from LF to UHF, along with examples of what these signals look like on a waterfall display.

With the proliferation of digital modes found on-the-air today, it's often fairly baffling, trying to figure out what you are hearing. The main database page contains a staggering 272 different identified modes of transmitting information, in one way or another ... no wonder it's hard to keep track!

Clicking on any of the modes will bring up more details about the mode, sometimes with links to the decoding software and further reading.

'PICCOLO' - courtesy:

I'm sure there are more that aren't on the list (is WSPR there or did I just miss it?) but it's still an impressive and helpful collection for those that use a waterfall display on their receivers.

Subscribe FREE to's
Amateur Radio Newsletter

We never share your e-mail address.

Do you like to write?
Interesting project to share?
Helpful tips and ideas for other hams?

Submit an article and we will review it for publication on!

Have a ham radio product or service?
Consider advertising on our site.

Are you a reporter covering ham radio?
Find ham radio experts for your story.

How to Set Up a Ham Radio Blog
Get started in less than 15 minutes!

  • Matt W1MST, Managing Editor

Sign up for our free
Amateur Radio Newsletter

Enter your e-mail address: