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Skywave · 11th Aug 2018, 8:28 pm

Ah! I understand now: thanks.
I was thinking in terms of source - with its internal Z - connected to a 50Ω line - connected to a 50Ω spectrum analyzer. But with a chain of interconnected 50Ω modules, 'tapping off' at an intermediate point in that chain to a load (such as an S.A.) - which presents 50Ω to a source - is a different scenario. At that point of measurement, the source will indeed 'see' 50Ω||50Ω.

Al.

11th Aug 2018, 8:28 pm	#53
Skywave Rest in Peace Join Date: Jun 2006 Location: Chard, South Somerset, UK. Posts: 7,457	Re: Back terminated cable? Ah! I understand now: thanks. I was thinking in terms of source - with its internal Z - connected to a 50Ω line - connected to a 50Ω spectrum analyzer. But with a chain of interconnected 50Ω modules, 'tapping off' at an intermediate point in that chain to a load (such as an S.A.) - which presents 50Ω to a source - is a different scenario. At that point of measurement, the source will indeed 'see' 50Ω\|\|50Ω. Al. Last edited by Skywave; 11th Aug 2018 at 8:36 pm.