1) My take on dynamic range is the ratio between the fixture with nothing
between the two ports to a fat and short as possible conductor between the
ports. With the recent images and using the HP8753C, that measured 80 dB
over the HF frequency range.
2) The capacitance at each port is 2.7 pF measured directly at each BNC
connector. I just measured it. That certainly is quite low especially for
HF frequencies.
Dave - W?LEV
On Mon, May 19, 2025 at 5:04?PM Brian Beezley via groups.io <k6sti=
[email protected]> wrote:
OK, after looking more carefully at the photos, I think you're referring
to the ratio of the desired signal through the device under test to the
residual feedthrough with the device absent. Correct me if I'm wrong.
Did you consider the effect of the increased capacitance to ground at each
port? It looks like it may be substantial. Easy to measure.
Brian
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*Dave - W?LEV*
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Dave - W?LEV
