[SI-LIST] Re: VNA and characterization of long cables
- From: Mark Filipov <markfilipov81@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Tue, 24 Apr 2012 01:02:45 +0200
Hi all!
I have found an reference that says that it seems the longest cable,
we can measure is 10m long.
"With a wiring delay of about 5 ns/m, a 10 m cable has a time delay of
about 50 ns, requiring an equivalent time window of at least 100 ns.
The required frequency interval of 10 MHz sets 10 m as the boundary of
the longest-length cable that can be measured unambiguosly with a VNA"
Source: Signal Integrity Characterization Techniques / edited by
M.Resso & E.Bogatin.
Page: 489, you can read it online on Google books.
But if we have better VNA couldn't we measure longer cables then these 10m?
Best regards, Mark
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