InstallShield and InstallSpear

@atax1a (You've hinted at a follow-up question :P: "If the headend is using Frequency-Division-Multiplexing and sending All The Channels at once, how does the headend manage to stack all the voltage waveforms without burning my coax to a crisp while simultaneously not attenuating each channel to oblivion"?)

@dressupgeekout "Why didn't I look up Wikipedia?" I _did_ :P. Just the wrong article: https://mastodon.social/@cr1901/114736404366870216

@ericphelps Yup, I didn't think to look up the NTSC article because I thought the NTSC article dealt with the purely baseband behavior (4.5 MHz).

@atax1a (You've hinted at a follow-up question :P: "If the headend is using Frequency-Division-Multiplexing and sending All The Channels at once, how does the headend manage to stack all the voltage waveforms without burning my coax to a crisp while simultaneously not attenuating each channel to oblivion"?)

@cr1901 it's complicated. analog TV uses vestigial sideband modulation (amplitude modulation for low frequencies and single sideband for high frequencies) for the video and frequency modulation of a pilot tone for the audio.

Since NTSC uses vestigial sideband, I assume that implies something AM-like, but what do I know? Can USB/LSB/DSB-SC even exist for FM :P (I don't think so)?

#lazyweb Stupid question time: Does analog TV use FM or AM?

To narrow the scope: Let's assume it's the USA in 1970s/80s and I've tuned my color TV to channel 4, and the signal is coming in through coax cable (i.e. cable TV- no antenna on premises). Where did the signal running through my coax come from, and what are its contents?

You'd think this be easy to look up, but when I look up "channels", I get frequency bands/bandwidth and not much else.

Motorola 68030 33Mhz CPU (MC68030FE33B)

Dear non-fat people,

we do not have to change our body to not get harassed. You can also just stop harassing us.

Sincerely, fat people

They have libraries in Hell. They're free, open to all, but they only have audiobooks narrated by the same AI voice as those mobile game adverts.

Das @noc hat witzige Client-Statistiken im Infrastructure Review veröffentlicht.
#gpn23

@brouhaha > But people often tried putting a 20 foot cable from the BNC on the NIC card to the BNC tee in the 10base2 cable. That doesn't work well at all.

At 4:58 in my linked video, he said using a T as a splitter will give 25-Ohms-ish from POV of the junction. I'm guessing he's assuming you're not attaching the third port of the tee directly to equipment, but using an intermediate cable. He uses a resistive splitter instead (which I forget how they work :P).

@brouhaha > The driver has to be designed for that, which of course 10base2 transceivers are.

So 10base2 transceivers have a DC source impedance of 25 Ohms, and a stub that makes the card/tee look like a short to the 10 Mbps signal going down the coax?

What do the stubs on NIC cards look like? I have a Kingston ISA NIC, and there's a few caps _next_ to the BNC connector, but no components attached directly to it...