home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!olivea!apple!apple!veritas!amdcad!weitek!pyramid!pc
- From: pc@slipknot.eng.pyramid.com (pc)
- Newsgroups: rec.audio
- Subject: Re: WARNING: Sound Techniques of Los Gatos
- Keywords: Measurement techniques
- Message-ID: <182825@pyramid.pyramid.com>
- Date: 28 Jul 92 08:31:28 GMT
- References: <13468@auspex-gw.auspex.com> <182576@pyramid.pyramid.com> <1992Jul23.233501.21786@cuug.ab.ca>
- Sender: news@pyramid.pyramid.com
- Distribution: ba
- Organization: Pyramid Technology
- Lines: 29
-
- In article <1992Jul23.233501.21786@cuug.ab.ca> ingoldsb@cuug.ab.ca (Terry Ingoldsby) writes:
- >I have nothing to say regarding the quality of service from Los Gatos, but
- >several comments on testing equipment.
- >
- > 1) A scope (unless equiped with a frequency meter) does not work well
- > for frequency measurements. You will be lucky to get accuracy better
- > than a few per cent in my opinion. Complaining over 1% errors by use
- > of a scope is probably not meaningful.
-
- It works well enough. My complaint was a 1% *difference* between the decks.
- A scope is just as good as a freq. counter for this.
-
- > 2) Don't be tricked by measuring voltage. Always convert to dB. You may
- > find that voltages can vary more than you think for almost immeasurable
- > (or at least inaudible) dB. Remember 6dB change means a doubling in
- > voltage. The scale is non-linear. Convert to dB and see what results
- > you get.
-
- I am aware of that. There was a 4db difference between channels. Anyway,
- I spoke to another audio repair shop and had them confirm my results.
- They said my decks are fixed (correctly this time) and ready for pickup
- tomorrow.
-
- pc
- --
- -m--------- Patrick Connor Pyramid Technology
- ---mmm------- (408) 428-8819 3860 North 1st St.
- -----mmmmm----- pc@pyramid.com -or- San Jose, CA
- -------mmmmmmm--- uunet!pyramid!pc 95134
-