Tuesday, August 27, 2019

Testing opposite sideband rejection with a mobile phone

One of the important things when building SSB transmitters is opposite sideband rejection. You don't want to be causing interference to people on adjacent frequencies. And, if the crystal filter section is shared with the receiver, you won't want to suffer adjacent channel interference due to your receiver's poor selectivity. 

Here's a video where I use an audio spectrum analyser app to test the opposite sideband rejection of a homebrew SSB rig. 

PS: Heard about my new book? It's the Australian Ham Radio Handbook. Find out more here!

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