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Topic: osciloscope & rta´s

Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99

posted 10-03-2009 08:42 PM

John,

Not really intended for that. Although they can monitor audio they are not a dual sweep scope in the literal sense. These scopes include an X-Y input and some models have an AES input strictly a monitoring device.

Mark

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Paul J. Neuhaus
Expert Film Handler

Posts: 126
From: Iraq.. Again!
Registered: Jun 2005

posted 10-08-2009 01:56 PM

a pretty good scope that I have used with usb screen capture capabilities is the Fluke 199C handheld

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99

posted 10-09-2009 07:27 AM

Paul,

Hand held scopes are great for many things however the problem with that type of scope is that you can't look at the Dolby Digital video waveform with it. It does not have a fast enough sampling and refresh rate to do the job.

Mark

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Marco Giustini
Film God

Posts: 2713
From: Reading, UK
Registered: Nov 2007

posted 10-09-2009 05:27 PM

I love my Fluke 3082. Definitely not small but there aren't any trimmers inside: fully digital controlled, but old-fashioned CRT!

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Mike Moreno
Expert Film Handler

Posts: 200
From: culiacan sinaloa mexico
Registered: Jul 2008

posted 10-20-2009 02:48 PM

and what can you tell me about a decent real time analizer?

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999

posted 10-20-2009 05:59 PM

There are many "decent" ones. That is, there are many that will give good displays and potentially very useful information. Smaart Live http://www.eaw.com/products/software/EAWSmaart/ Is quite popular in the A/V and Pro audio circles (Dolby even had/has a version of it but oriented towards cinemas). However, who is doing the mic calibrations? When you get a plexer (such as the USL)...who is "calibrating" them in either frequency or level? The quality of the reading is not determined so much by the display but by the signal being displayed. Part of what you are seeing when you look at a typical analyzer is the frequency response of the microphone superimposed over the frequency of the sound you are measuring.

However, the D2 analyzer gets the highest marks in my book (for what it measures) because it is the only one that really has a combination of mic normalization as well as a means for uniform calibration. If you have your mics calibrated each year (a requirement for any meaningful analyzer) then you are going to get VERY consistent results out of the D2.

As such you can have several different techs use either an R2 or D2 and despite differences in techniques or exact mic placements, achieve nearly identical results.

http://www.acoustx.us/index.html

Steve

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