ethernet card as a square wave generator???

[tiger]

I have 2 questions.

I have 1Gbps ethernet card.
(1)If i can rewrite ethernet device driver for OS, can i use the
ethernet card as square waveform generator(signal generator)???


(2)If it is possible, How fast can i send square waveform? I mean what
frequency?
I know "1Gbps" do not actually mean "1Ghz". then 1Gbps card has
maximum what frequency?

 

[whit3rd]

On Aug 12, 11:47 pm, tiger <cedric.u...@gmail.com> wrote:

I have 2 questions.

I have 1Gbps ethernet card.
(1)If i can rewrite ethernet device driver for OS, can i use the
ethernet card as square waveform generator(signal generator)???

(2)If it is possible, How fast can i send square waveform? I mean what
frequency?
I know "1Gbps" do not actually mean "1Ghz". then 1Gbps card has
maximum what frequency?

There are multiple 1G Ethernet standards (fiber channel and optical
fiber) but usually one speaks of 1000baseT type, with four twisted
pairs.
That signal is five-level (not binary, i.e. two-level, at all).
Signal rate on
each of the pairs is 100 MHz, just like in 100baseT. A cycle of
a square wave has TWO transitions, so 50 MHz is the upper limit.

 

[Jasen Betts]

On 2008-08-13, tiger <cedric.ubiq@gmail.com> wrote:

I have 2 questions.

I have 1Gbps ethernet card.
(1)If i can rewrite ethernet device driver for OS, can i use the
ethernet card as square waveform generator(signal generator)???

Maybe, you may need to load new firmware into some of the chips on the
card....

(2)If it is possible, How fast can i send square waveform? I mean what
frequency?
I know "1Gbps" do not actually mean "1Ghz". then 1Gbps card has
maximum what frequency?

http://www.10gea.org/GEA1000BASET1197_rev-wp.pdf

the signal rate is 125Mbaud so max frequency is half that. (67.5Mhz)
I can't say how square they will be.

Bye.
Jasen