Signal integrity systems is a world leader in High speed Channel characterization. We have the most current equimpet from the most trusted brands
We can convert measurements from the any domain to another including time, frequency, electrical(RLGC), geometry(w,l,h,t)
We can make high speed connections to any device under test. Our measurements are gauranteed to be accurate withing 1%
A picture of a VNA measurement follows.

VNA Results

We can measure impedance to within 0.1ohms. A picture of a TDR profile follows

TDR Results

We can take measurements on board or on a coupon. We even have automated test solutions for large jobs.

We can perform cross and horizontal sections on your samples.
Cross Section