Home Networking

198 readers

1 users here now

A community to help people learn, install, set up or troubleshoot their home network equipment and solutions.

Rules

Please stay on topic.
Please use the search function to look for keywords related to what you want to ask before posting since most common issues have been answered.
No Ads. This community is for support and discussion. Ads and self promotion are not welcome here.
No product reviews or announcements. If you have a question about a product, be specific about what you want to know.
Be civil. Don't be a jerk. Not being a jerk is surprisingly easy.
No URL shorteners. URL shorteners tend to hide the real use of a link. For this reason, please use normal links, even if they're long.
No affiliate links.
No gatekeeping. With profession shall come professionalism. Extend help without judging others for their ignorance. The same goes for downvoting of comments or posts for "stupid questions" or not being as knowledgeable as others.

founded 1 year ago

MODERATORS

[email protected]

How the f*ck does a modem work? (alien.top)

submitted 11 months ago by [email protected] to c/[email protected]

31 comments fedilink hide all child comments

Google searches have only yielded 5th grade level examples (“the modem talks between your ISP and your home network!”) or articles I would need a degree to understand. Can anyone provide an explanation that’s somewhere in between the two? I understand the fundamentals of how the Internet works, and how LAN works regarding a router and individual devices, but I’m curious to know more about the link between those.

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 1 points 11 months ago

How deep are you willing to go.

I'm a computer engineer, I design and develop embedded systems like modems, TCU, ECU and many others.

If you want to understand how a modem works, truly understand everything. You need to first understand some basic physics primarily electromagnetism and the property of waves.

From there you can jump to a higher abstracted level such as amplitude modulation, frequency modulation and phase modulation. From this you can try to read up on Quadrature amplitude modulation.

You can also use this to understand demodulation.

Then jump back to the lower level and study up signal theory and how these things work.

Honestly the level of information to fully understand how a device like a modem is huge.

If you love this stuff and you're still young I would encourage you to become a computer engineer with a focus in asic. It's not easy but the stuff you work on is rewarding.