w2aew | #262: IQ Modulator Basics: Operation, measurements, impairments @w2aew | Uploaded June 2017 | Updated October 2024, 8 minutes ago.
This video discusses the basics of an IQ modulator, discusses and demonstrates its operation, shows a few typical modulation types as well as the effects of various impairments. It also shows the basic SSB Suppression test. I use a combination of a few Mini-Circuits mixers (ADE-1ASK) for much of the video, and also show one of their IQ Modulator modules (ZFMIQ-10M). As mentioned in the video, there are a few pre-requisite videos that are recommended to watch prior to this video:

Basics of IQ Signals: youtube.com/watch?v=h_7d-m1ehoY

Diode Ring Mixers: youtube.com/watch?v=junuEwmQVQ8

And a few for extra credit:

IQ Signals Part II: youtube.com/watch?v=5GGD99Qi1PA

Basics of RF Mixers: youtube.com/watch?v=Mm7WfVzr1ao

Mixer LO drive level: youtube.com/watch?v=GvadQpkZ8l0

Notes from this video can be found here:
qsl.net/w2aew/youtube/IQ_modulator_basics.pdf