How do Cable Tone Generator/Tracers work?

[Super_voip]

How's your Cat7 going, 100G must be fun.

 

[johankj]

Unfortunately though they almost always don't release the code, requiring you to buy it from them!.

EPE is far better, even more PIC articles, and the software is always a free download.

Now that you point that out, I read EPE too, EPE are more liberal with their code. BTW, EPE has started, with the December issue, a "PIC Teach-In", which will go on for 2008...

 

[johankj]

How's your Cat7 going, 100G must be fun.

I tend to avoid CAT6/7, because they are stiffer (harder to handle), and the connectors for CAT5 are so much easier/quicker to do. 100G?

 

[CheapSlider]

DAB! - it started in the UK and was developed here, but coverage is useless and quality isn't as good as FM radio, and some channels are only in mono!.

Being the first is not always the best: **broken link removed**

After the UK adopted the DAB standard the rest of Europe decided to use DAB+. The French are thinking about using **broken link removed**

The other digital radio option is **broken link removed**. This has been designed for use with narrowband AM (LW,MW,SW). DAB is for Band I and above (L-
Band is used in Europe). DRM at frequencies above 30MHz is being investigated.



We in the UK continue with our record:
405 line TV
625 TV 6MHz sound carrier (rest of Europe 5.5MHz)
The UK diid get it right with PAL colour Television (There was a lobby proposing 405 line NTSC. France went SECAM)

 

[johankj]

We in the UK continue with our record:
405 line TV
625 TV 6MHz sound carrier (rest of Europe 5.5MHz)
The UK diid get it right with PAL colour Television (There was a lobby proposing 405 line NTSC. France went SECAM)

Hehehe... I mention:

• Left-hand-side driving.
• Miles, pounds, stones, gallons, feet, etc...
• UK-Mains plugs
• No Euro

You have always gone your own way.
But you did do the hover-craft, the colossus, the radar, the steam engine, the spinning machine, and so on... I wouldn't say you're in the back-water technology wise, you just seem to pick the oddest adoptions and standards. BTW, please vote no MS-OOXML!!

 

[Nigel Goodwin]

We in the UK continue with our record:

You need to put this into perspective!.

405 line TV

You seem to ignoring that the UK had the worlds first TV service, obviously it was likely to be the lowest spec one.

625 TV 6MHz sound carrier (rest of Europe 5.5MHz)

What was (is) wrong with that?, we adopted a superior 625 line TV system, with greater video bandwidth. The rest of Europe adopted a crippled system because they used VHF, the UK used UHF so could use greater channel spacing.

The UK diid get it right with PAL colour Television (There was a lobby proposing 405 line NTSC. France went SECAM)

Yes, we got it right with PAL - except it was German of course, and not British!

But DAB was (and is) a disaster - a technological step backwards for no good reason?.

 

[Super_voip]

Radar, when did they invent that, the Germans had been playing with radar for 30 years before the british. The French also happened to find out all about radar before the british. Ahh yes Logie TV, how many vertical lines? Winners write the history.

 

[Super_voip]

Cat3 10Mb
Cat5 100Mb
Cat5e 350Mb
Cat6 1Gb
Cat6e 10Gb
Cat7 100Gb

Roughly

 

[Super_voip]

I found some Baird TV, I think they found some original recordings, as the signal was very narrow band it could be recorded onto wax disks(records)https://youtube.com/watch?v=HIjlzyn_2H8

 

[johankj]

Cat3 10Mb
Cat5 100Mb
Cat5e 350Mb
Cat6 1Gb
Cat6e 10Gb
Cat7 100Gb
Roughly

That is correct for some of the IEEE 802 standards, but CAT refers to category of cable, not it bandwidth.

 

[Super_voip]

I've only just encountered some ads from Krone for their Cat7 products.
I get 1Gb over Cat5e, on short runs.

 

[johankj]

I've only just encountered some ads from Krone for their Cat7 products.
I get 1Gb over Cat5e, on short runs.

In principle, that is not a problem. If you are in a relatively low-noise environment, CAT5e has a bandwidth of roughly up to 100MHz, but is degraded very quickly over distance. For a home network, where cables are of max length 10m, there is no issue using CAT5e for GB networking.

 

[manoharfisher]

circuit tracer

can u give me the circuit ciscription of a cable or wire tracer.

 

[johankj]

can u give me the circuit ciscription of a cable or wire tracer.

I can probably make you a Tone Generator circuit, but I'm not skilled enough to design you a Inductive Probe circuit.

I belive, in essence, that it works just like a radio. You modulate the tone generators frequency so that it's within the tuned spectrum of the inductive probe.