zainka
Full Member level 2
In a test setup I need to emulate a long twisted pair cable of 1000m with 6dB loss, 100R /120R/ and 130R char.imp.
Are using a resistor setup today but this is just an very simple approach which only merely meet the attenuating characteristics for a twisted pair cable.
the line is a bidirectional data line sending data at 2048 kb/s.
**broken link removed** discuss a twisted pair model for 10BASE-T / 100m cable as found in ch.14 figure 14.7 and 14.8
Calculations is not shown and I would like to learn how to do this including compensating for length to be 1000m and not 100m.
Second, I might meet my criterias using a simpler approach but more up to the real cable than the my solution shown above.
Did also take a look at microwaves101 and their calculators, but its quite similar to my existing design which only considers the attenuation.
Are using a resistor setup today but this is just an very simple approach which only merely meet the attenuating characteristics for a twisted pair cable.
the line is a bidirectional data line sending data at 2048 kb/s.
Code:
----R1-----R1-----
|
in R2 out
|
----R1-----R1-----
For 100R
R1~21.8R
R2~173.5R
**broken link removed** discuss a twisted pair model for 10BASE-T / 100m cable as found in ch.14 figure 14.7 and 14.8
Calculations is not shown and I would like to learn how to do this including compensating for length to be 1000m and not 100m.
Second, I might meet my criterias using a simpler approach but more up to the real cable than the my solution shown above.
Did also take a look at microwaves101 and their calculators, but its quite similar to my existing design which only considers the attenuation.