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Re: [TowerTalk] TowerTalk Digest, Vol 117, Issue 9

Subject: Re: [TowerTalk] TowerTalk Digest, Vol 117, Issue 9
From: Jim Brown <>
Date: Tue, 04 Sep 2012 10:17:05 -0700
List-post: <">>
On 9/4/2012 10:00 AM, Spencer wrote:
You need a FAST rise time pulse generator with variable repetition rate and pulse width. A good scope. A test setup. ANY Z discontinuities will cause a reflection and will show up on the scope trace.

There are several ways to skin this particular cat. That's one of them. Transforming a frequency sweep is another, and has been widely used in the pro audio world for at least 30 years. One of the major advantages is signal to noise level. Another is that you can limit the response to the frequency range in which you are interested. For example, small discontinuities that would be more problematic at UHF can be ignored by using a sweep that only goes to 100 MHz, and those discontinuities emphasized by using a sweep that begins at 100 MHz or or so and sweeps to a higher frequency.

73, Jim K9YC

73, Jim K9YC

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