Propeller Head Plaza

Re: Perspective, how about this:

192.160.103.164

[ Follow Ups ] [ Post Followup ] [ Thread: Display All Email ] [ Propeller Head Plaza ]

Dan Banquer

(M)

In Reply to: Re: Perspective, how about this: posted by john curl on December 08, 2003 at 12:12:08:

As you have observed, a wider bandwidth will by definition have more noise and be more susceptible to interference. However; keeping the bandwidth, let's say at 30 kHz will reduce this effect. Given that you are finding "crossover distortion" at 5 kHz in your test set and Bruno is not at 1 kHz says more about test equipment and test environment.
As we also have observed the noise floor in Bruno's test set appears to be about 20 db lower than yours if I remember correctly.
In conclusion I will ask you once again to check your test set up and especially the Oscillator in your source equipment. Given your previous statements on earth grounding I will ask the question; Is your HP Analyzer and your Source equipment properly grounded?

Follow Ups:

Re: Perspective, how about this: - john curl 15:49:28 12/08/03 (3)
Just to clarify things: I use 5 KHz, because my test equipment null is more stable at 5KHz than 1KHz this year. The tests that you are relating to were done YEARS AGO. I now use 5 KHz, as I did when first measuring with my linear spectrum analyzer starting about 10 years ago. I only changed, temporarily, to fit in the 20KHz window of the MAC FFT program. I prefer 5KHz when measuring other things, such as power amps, because it puts more stress on the unit under test.
- Re: Perspective, how about this: - Dan Banquer 05:16:45 12/09/03 (2)
  You have not addressed the other part of my question on grounding. My other question is why is 5 kHz more stressful on wire as opposed to 1 kHz?
  - Re: Perspective, how about this: - john curl 11:57:59 12/09/03 (1)
    It is more stressful on amps and preamps which is what I make for a living. That is why I first improved my equipment in order to make tests like these. Wire is an afterthought.
    - Re: Perspective, how about this: - Dan Banquer 13:12:46 12/09/03 (0)
      You still haven't answered my question on grounding.

This post is made possible by the generous support of people like you and our sponsors:

Atma-Sphere Music Systems, Inc.

You can not post to an archived thread.