chihhao
Full Member level 4

(1) Soldering a little bit at the front of cable for ground contact
(2) Soldering half of cable for ground contact
(3) Fully soldering btw cable and PCB GND
I measured impedance by the way (1) (2) & (3) and they all got similar
measurement results. Frequency ragne is below 2GHz. I'm confused about it
seems the way (3) is the most standard way for measurement but how come
the way (2) & (3) got similar measurement result compared with the way (3) ?
According to your experience, what effect will be resulted in according to these 3 different ways? How to explain its effect ? Which way you are used to doing
measurement ? Thanks for your help.
(2) Soldering half of cable for ground contact
(3) Fully soldering btw cable and PCB GND
I measured impedance by the way (1) (2) & (3) and they all got similar
measurement results. Frequency ragne is below 2GHz. I'm confused about it
seems the way (3) is the most standard way for measurement but how come
the way (2) & (3) got similar measurement result compared with the way (3) ?
According to your experience, what effect will be resulted in according to these 3 different ways? How to explain its effect ? Which way you are used to doing
measurement ? Thanks for your help.