4 posts / 0 new
Last post
cable company story

When I was employed as a Field Tech/Installer between 1996 and 2002 for an ISP.
On one preticular job I was installing a T1 circuit for a Cable TV company, during the turn up procedure the idle chit chat was about the CATV gear, and how sensitave it was and that they couldn't put anythig near the combiner (What ever they called the rack full of gear that produced all the analog TV channels all lumped togeater at the head end)
Long story short I had to install the Cisco router and DSU on the other side of the room, cause "they didn't want it to interfere with the TV service"

Funny Thing

Digital TV stops showing  picture if enough packets are dropped.
Analog TV keeps going with what ever horrible quality it can serve you with. ;)
 
This i can tell from exprience, I installed TV and TV sets once in a blue moon.

So are you implying there

So are you implying there should be an analog fallback option? So WHEN the packet loss gets too bad it can jump to the reliable analog selection.

Bandwidth limitations

I am implying no such thing.
Besides having such a fallback option would require more Bandwidth then it's worth IMHO.
Here i have a system that has analog TV digital TV, telephone and internet all going through the same copper wire.
To increase bandwidth what they do here is drop a analog channel, because a digital one requires less bandwidth.
There are currently laws here too that tells the Service providers not to go below a certain amount of analog channels for now!
There reason analog channels take more bandwidth is Adjacent-channel interference they are keeping space between channels so they need no filtering really besides what a tuner does.
This is where you can also notice when you connect a Commodore or atari(doesn't really matter which one as long as connected by antenna), NES and even SNES show when turned on the tuner gets interfering signals.

Log in or register to post comments