Re: So, The measurements are useless?

Pro Audio Asylum

Pro studio recording equipment and music production/industry.

In Reply to: So, The measurements are useless? posted by SJK on January 3, 2002 at 13:49:22:

The issue of which pin is Plus or Minus has to do with the polarity (absolute phase) of the signal. If your gear has transformers then they connect one side of the secondary to the plus pin and the other side to the minus pin. If you put dual channel scope on both the plus and minus pins you would see the signal is present on both pins it is just inverted on the negative pin.
Note: Both signals are going up and down, The only way to tell which one is which is to connect something like a kick mic to the cable and have someone kick the drum while you are watching it. The one that goes positive first is the plus signal.
Note: Some transformerless gear just connects the minus pin to some DC voltage (or ground) through a resistor and the live signal is on the plus pin.
Phil

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Follow Ups Full Thread

Topic - Which XLR Pin Is Hot? - SJK 11:30:57 01/02/02 (7)

Re: Which XLR Pin Is Hot? - RBP 00:26:05 01/03/02 (6)

Re: Which XLR Pin Is Hot? - SJK 02:45:31 01/03/02 (5)

Re: Which XLR Pin Is Hot? - Bill Wassilak 08:29:28 01/03/02 (4)

So, The measurements are useless? - SJK 13:49:22 01/03/02 (3)

Re: So, The measurements are useless? - Haldor 14:55:00 01/21/02 (0)

Just a FYI. - one50 17:39:15 01/03/02 (1)

Re: Just a FYI. - hollywood_steve 20:16:41 01/03/02 (0)

Follow Ups

Re: So, The measurements are useless? - Haldor 14:55:00 01/21/02 (0)

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