Green booted fibre connectors are a little special. The ferrule has an angled polish of 8 degrees, which helps to reduce back reflections. Because of that angled polish you should only ever connect a green boot to another green boot. They are generally known as "APC" connectors. Blue booted connectors have a flat polish (PC), or perhaps slightly rounded (UPC), and it's generally fine to connect any blue boot to any other blue boot. But definitely never connect a blue boot to a green boot as the ferrule polishes are incompatible.
Interesting look at these things. I came across some very similar boards on the scrapyard lately. I assumed them to be some kind of TV stuff, now I know. Interesting to note is that the cable TV guys work with dBuV instead of dBm and therefore in voltage, not power. I just thought this might be an interesting detail and that's also why you don't find any max. power output numbers in the amplifier data sheets. The casings on these look pretty rectangular on the inside, they might be pretty interesting for some outdoor (radio) projects.
I've been thining of playing with some optical cable internet and tv boxes I find at the garbage. Provly not a very strong emitter though but some interesting components and controllers.
Cool stuff. I love seeing the internals of industrial equipment. The older the better :)
Very nice teardown 🙂
Nice teardown! Always wondered what was going on in the node boxes and such.
I got another box in the work shop, so at least one more Cable TV box teardown video to come in the future :)
Green booted fibre connectors are a little special. The ferrule has an angled polish of 8 degrees, which helps to reduce back reflections. Because of that angled polish you should only ever connect a green boot to another green boot. They are generally known as "APC" connectors.
Blue booted connectors have a flat polish (PC), or perhaps slightly rounded (UPC), and it's generally fine to connect any blue boot to any other blue boot.
But definitely never connect a blue boot to a green boot as the ferrule polishes are incompatible.
Thank you for teaching me something I did not know! :)
Nice teardown and interesting components.
Where do you get the items for the teardowns?
Privately owned scrap yards :)
Interesting look at these things. I came across some very similar boards on the scrapyard lately. I assumed them to be some kind of TV stuff, now I know.
Interesting to note is that the cable TV guys work with dBuV instead of dBm and therefore in voltage, not power. I just thought this might be an interesting detail and that's also why you don't find any max. power output numbers in the amplifier data sheets.
The casings on these look pretty rectangular on the inside, they might be pretty interesting for some outdoor (radio) projects.
I've been thining of playing with some optical cable internet and tv boxes I find at the garbage. Provly not a very strong emitter though but some interesting components and controllers.
A company selling blank PCBs as replaceable modules makes a good bedfellow for Cisco.