MOST of us '
hobbyists' have/use
Budget equipment, as opposed to some of the Professionals here.
I for one, am starting again in my old age, after loosing all my test equipment many decades ago !!
A LOT of us (?)
may/do have such cheap devices like the "
FG-100 DDS Function Generator", for $24 !

As an example, that's all cute, well & good! However, some of us want say '
Amplitude-Modulation' as
well, amongst
other things! Well, if you are working on old radios etc, and want to tune '
IF' (intermediate
frequencies like 455-khz etc), then you can pay many hundreds if not thousands of dollars for specialized
test-equipment. So for just
ONE example, how can we simply add 'Amplitude-Modulation' to our signal!?
I reviewed
numerous methods, involving relatively complex circuit designs, until I found out about the...
AD633 Chip!! It's all done for you!!!....

This is but
ONE of it's functions/uses(modes), requiring virtually NO other circuitry! The above image was
taken from the Spec/Data sheet for that chip, which varies from about $1 to $2. Spec-Sheet...
https://www.tme.eu/Document/ce5356ac4efb480c752b9e53289e2634/AD633ARZ-Analog-Devices.pdfInput your '
Modulation' tone, (
or voice!) along with the '
Carrier' and you are home & hosed!!
See the likes of....
for a simplistic demo. I need to stop reinventing the wheel, and use such simple & cheap devices, in
conjunction to what I have, without needing lots of money!!

With just a LITTLE bit of fore-thought, we can do SO much more, with what we have
