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» Film-Tech Forum   » Operations   » Film Handlers' Forum   » Is Dolby CP500 Aux input 0.388V rms or pk-pk?

   
Author Topic: Is Dolby CP500 Aux input 0.388V rms or pk-pk?
Gary A. Hoselton
Film Handler

Posts: 51
From: Portland OR U.S.A.
Registered: Nov 2005


 - posted 05-18-2017 02:26 PM      Profile for Gary A. Hoselton   Email Gary A. Hoselton   Send New Private Message       Edit/Delete Post 
Am marrying MPU to CP500, with STA-1 stick-on line amplifiers between to increase Cat 92 outputs to what CP500 Accessory Rack Analog Connector pins 15-19 want. Footnote says Dolby Level is 0.388mV at those pins. Is that rms voltage, as a voltmeter would measure, or pk-pk as I see on my oscilloscope? While running 1kH test loop, will that voltage produce Dolby level in auditorium at Fader setting of 7? Thanks, Gary

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12136
From: Annapolis, MD
Registered: Dec 1999


 - posted 05-18-2017 06:40 PM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
RMS sine wave.

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Tim Androes
Film Handler

Posts: 22
From: seattle, washington, united states
Registered: Aug 2015


 - posted 05-21-2017 01:09 AM      Profile for Tim Androes   Email Tim Androes   Send New Private Message       Edit/Delete Post 
0.388mV or 388mV?

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Sam D. Chavez
Film God

Posts: 2081
From: Martinez, CA USA
Registered: Aug 2003


 - posted 05-21-2017 01:27 AM      Profile for Sam D. Chavez   Author's Homepage     Send New Private Message       Edit/Delete Post 
388 mVolts or .388 Volts.

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Gary A. Hoselton
Film Handler

Posts: 51
From: Portland OR U.S.A.
Registered: Nov 2005


 - posted 05-23-2017 06:01 PM      Profile for Gary A. Hoselton   Email Gary A. Hoselton   Send New Private Message       Edit/Delete Post 
Thanks, Sam. 388mV is what I intended to write.

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