Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

the number of wavelength in transmission line

Status
Not open for further replies.
0

020170

Full Member level 4
Joined
Jan 31, 2005
Messages
231
Helped
3
Reputation
6
Reaction score
1
Trophy points
1,298
Activity points
2,221
A building is wired with 10MHz Ethernet cable. Assuming a velocity of propagation 20 cm per nanosecond.

The number of wavelength of the 10MHz signal = 30m/20m = 1.5

what does it mean 1.5?

I can calculate the number of wavelenght, but I don't know what does it mean.

thanks
 

For a data cable, the calculation doesn't mean anything. First point is, you have no 10 MHz sine wave with ethernet signaling but a complex pulse pattern. Second point is, you have termination at both ends and (hopefully) not standing waves. Thus signal delay is the most interesting cable property, furthermore frequency dependant attenuation, appearing as pulse distortion here.
 

It only means that the cable is 1.5 lambda.
Or in other words, the phase of the signal
does not change.
 

    0

    020170

    Points: 2
    Helpful Answer Positive Rating
As mentioned above, this number means nothing usable in ethernet cable. In some point of view, it can be interpreted as an electric length of this cable, which is in this case 1,5*360 deg = 540 degrees or 3 pi.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top