Re: dBu
John, thanks for the reference. It gave a good historical perspective. It would seem the use of dBv (.775 V reference) and dBV (1.0 V reference) created enough confusion for the pro audio industry to introduce the new unit dBu. While not an active observer in the pro audio scene, I would probably not have appreciated the subtle difference between little v and big V. Good thing they changed it... -- = Daniel Kwok Vancouver, BC, Canada Intetron Consulting, Inc. Telephone 604.432.9874 Email dk...@intetron.com FREE EMC Tips @ our website http://www.intetron.com; = - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: dBu
Dave, Here's a link which explains some of the dB variations including dBu. -http://www.music.mcgill.ca/~martin/textbook/electronics/03.html John Juhasz Fiber Options Bohemia, NY -Original Message- From: Dave Wilson [SMTP:dwil...@babtps-us.com] Sent: Thursday, January 20, 2000 4:16 PM To: emc-p...@ieee.org Subject: dBu Has anyone come across this unit before? It's referenced in EN55103-2 (Professional Audio/Video Immunity) for audio frequency common mode immunity testing. I realise it may be a misprint, but I thought someone else may have already looked into it. Dave Wilson BABT Product Service - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: dBu
Dave, I have always seen this used for micro, as in dBuV = decibel microvolts. It may also stand for decibel units. If so, a unit is most likely 1 volt rms, a common unit in professional audio. The formula would be 20 X LOG(input voltage/reference voltage), with LOG referring to LOG 10. Scott Lacey -Original Message- From: Dave Wilson [SMTP:dwil...@babtps-us.com] Sent: Thursday, January 20, 2000 4:16 PM To: emc-p...@ieee.org Subject: dBu Has anyone come across this unit before? It's referenced in EN55103-2 (Professional Audio/Video Immunity) for audio frequency common mode immunity testing. I realise it may be a misprint, but I thought someone else may have already looked into it. Dave Wilson BABT Product Service - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: dBu
Dave Wilson wrote: Has anyone come across this unit before? It's referenced in EN55103-2 (Professional Audio/Video Immunity) for audio frequency common mode immunity testing. Hi Dave, Are you sure it isn't dBvu? If my memory serves me right, the VU is a volume unit commonly used in professional audio. -- = Daniel Kwok Vancouver, BC, Canada Intetron Consulting, Inc. Telephone 604.432.9874 Email dk...@intetron.com Free EMC Tips @ our web site http://www.intetron.com; = - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
