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Oscilloscope MRL Azimuth adjustment [message #198442]

Mon, 13 November 2006 07:18

2496
Messages: 2
Registered: November 2006
Location: N.Y.

Welcome

Hi, I just bought a used (1989)Tektronix 2335 2 channel (XY) scope. I bought this mainly to adjust the azimuth on my Studer A80 24 track with a new MRL test tone tape. Never using a scope before, I was assuming that I would simply hook up track 2 to X and track 23 to Y and see a phase pattern to adjust to. What I see are 2 sine wave patterns. After reading alot of info on line I've discovered that some people are suggesting that you need a scope that will allow you to disable the automatic sweep function so you can monitor phase, not a sine wave. I'm not sure that is possible with this particular scope. Also some are saying to adjust to white noise (which is also on my test tape)not a 1K and then 10K tone. Any thoughts? Thanks

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Re: Oscilloscope MRL Azimuth adjustment [message #198544 is a reply to message #198442 ]

Mon, 13 November 2006 18:07

dcollins
Messages: 2294
Registered: April 2004
Location: Beautiful Hollywood, CA

Platinum Member

2496 wrote on Mon, 13 November 2006 05:18

You need to put the scope in "X/Y" mode. Turn the sweep speed knob fully clockwise.

DC

Dave Collins Mastering

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Re: Oscilloscope MRL Azimuth adjustment [message #198545 is a reply to message #198544 ]

Mon, 13 November 2006 18:09

2496
Messages: 2
Registered: November 2006
Location: N.Y.

Welcome

Got it! Thanks

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Re: Oscilloscope MRL Azimuth adjustment [message #198659 is a reply to message #198442 ]

Tue, 14 November 2006 11:08

Larrchild
Messages: 2677
Registered: June 2005
Location: Fort Lauderdale, Florida

Platinum Member

Don't just use tracks 2 and 23. A phenomenon called "gap scatter" means all the head gaps are not perfectly aligned, vertically.

Take all 24 faders, pan 1-12 to the left and 13-24 to the right and use the scope across the 2-mix. This will average out the gap-scatter.

Larry Janus
http://tubeequipment.com

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