Hello
My Customer inquire the Hardware configuration.
The hardware configuration is as Below.
1. Do you have any Test Report related to the Wizard Link? (Maximum interlocking length / attenuation ratio)
2. Do you have reference data when connector does not mount directly on the PCB?
3. if removed the shield of coaxial cable that assembled between the panel and the PCB, How much will be affected?(How much the interlockable length is reduced? / How the difference in attenuation?)
Best regards.
Louis,
I have a couple of comments.
First off, these are system level issues that need to be addressed with modelling and simulation.
1) I am not familiar with the term interlocking. I am assuming this is the length of the impedance mismatch where cable connects to board?
Best solution would be to electrically model the transmission line to/from the source and destination. This section of the cable without shield will have a different impedance than the rest of the line. Its impact to the operation will be based on where the mismatch is located RX or TX side and magnitude of the mismatch.
If the ground on the cable is not tied to the ground on the PCB, then there will be much larger impact as the impedance will vary more.
2)No. This really fits into the signal integrity domain, and simulation. Ie, the mismatch needs to be simulated for SI impact.
3) Unknown. Simulation, or electrical testing would be required to evaluate. There are too many variables to have a rule of thumb answer.
If the interconnect can be modeled, you can simulate with IBIS, or Hspice.
See this post for the IBIS model, and if the Hspice models/testbenches are desired.
If this answers your question, please click "Verify it as the answer"
Regards,
Wade
