[SI-LIST] SI Testing of connector without a fixture

Hi,
I am planning to test a connector without a test fixture. (The connector is 
designed to be suitable for SMT soldering to PCB/BGA Packages)
I was thinking of a quick low cost method.
Solder a thin flexible co-axial cable with an SMT connector at one end to 
connect to TDR/VNA.
I plan on testing a differential pair. All the surrounding mated pin/sockets 
 to be soldered to a copper plate with a cutout at the signal pair .
My question is how thick should the copper plate be.  Also has anyone tried 
this method.  Were the results accurate enough.
If it works well for TDR, I was thinking of testing S Parameters on the VNA. I 
accept that there will be losses embedded from the short (2â??) co-axial 
cables/SMT for the VNA measurements.
At least I will get an idea about the connector performance.
Any thoughts/ feedback or better ideas will be appreciated.
Thanks,
Padma

      
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