Simple and straightforward in general terms. Thank.

I work with QAM equipment. Repairing, tuning, and bench testing. Watching the constellation during testing is cool to see live. This technology goes back decades but is still widely used today for cable internet. For sending large amounts of data through copper, this is primary. Fiber is superior, but even that is converted to QAM for coax. ATX, Broadband International, Scientific Atlanta and Arris still manufacture QAM amplifiers. In the beginning, the bandwidth ranged 54-330mhz, then to 450(i think), 550, 750, 860/870, 1,000, and now we're at 1.2hgz. GHZ doesn't play nice with coax over long runs, so eventually to keep up with data rate demands, either the modulation will change, coax will change, or everything goes to fiber. Great presentation!

Thanks for the explanations guys, I´ll give it good use. Rohde Schwarz you earned my appreciation.

Thank you for the understandable and compact wrap up of the topic! Also the comparison between (A)PSK and QAM really helped me to better understand the topic. Cheers.

This is one of the best explanations out there! Thank you!

You save my day again, thanks.

Kudos to you on a great presentation. You basically covered the essence of Digital communications subject in my undergrad school. Please keep it coming. Thank you.

Thanks for this great explanation of the basics, very helpful. Regards from Hannover/Germany, Danke.

Great ...Love from India🇮🇳

Thanks a lot. This video has saved me much time.

This kind of explanation is required for proper understating of the concept . Thanks for such great explanation.

Nice presentation

straight to point thanks

Very clear and informative. Thanks. Would love to hear more about the Crest factor (PAPR).

Very clear and precise explaination. Thx

it was so informative , thank you alot , what is the name of the playlist than contain this video ?

thx a lot

Thanks for the video - What does it mean when there are two extra symbols on a 64QAM measurement? I've noticed there are two symbols with 0 and 180 degree phase on every 802.11g measurement I do.

great

I don't understand how you get the number of bits at 2:00

Qam or qfm is the thing #ofdm

Why bother creating the word among when between is used for greater than two anyway.