- #1
touqeerazam
- 6
- 0
Transmission line charateristics measurement??
Dear all,
I want to do cable analysis of a 3800m long twisted pair wire to set up a communication system. It is not usual twisted pair wire (telephone), has different impedance, R=194, L=4mH, C=180uF. The things to be analyzed are, characteristic impedance, bandwidth, and SNR. The questions are,
1. I have used Time Domain Reflectometry to get impedance. I used resistive load to get the impedance values, don't know if i needed a complex load for this?
2. I have used signal generator and oscilloscope to get bandwidth at different atteuations. However the attenuations are not linear with frequency, and have a damping effect. i.e certain high frequencies have high attenuation than some lower ones. Dont know why??
3.How can i measure SNR, the equitment I got is Spectrum analyzer. I know Network analyzer could make life easy but don't have it.
I will be very thankful if you guys can shed any light.
Thanks again in advance and enjoy ur time..
T
Dear all,
I want to do cable analysis of a 3800m long twisted pair wire to set up a communication system. It is not usual twisted pair wire (telephone), has different impedance, R=194, L=4mH, C=180uF. The things to be analyzed are, characteristic impedance, bandwidth, and SNR. The questions are,
1. I have used Time Domain Reflectometry to get impedance. I used resistive load to get the impedance values, don't know if i needed a complex load for this?
2. I have used signal generator and oscilloscope to get bandwidth at different atteuations. However the attenuations are not linear with frequency, and have a damping effect. i.e certain high frequencies have high attenuation than some lower ones. Dont know why??
3.How can i measure SNR, the equitment I got is Spectrum analyzer. I know Network analyzer could make life easy but don't have it.
I will be very thankful if you guys can shed any light.
Thanks again in advance and enjoy ur time..
T