[TenTec] dbm and VU units of audio measurement

To:	<tentec@contesting.com>
Subject:	[TenTec] dbm and VU units of audio measurement
From:	rohre@arlut.utexas.edu (Stuart Rohre)
Date:	Mon Jul 28 15:03:39 2003

Ken,
You are thinking of dbmw  dB re one milliwatt; and the VU "Volume Unit" both
of which are usually spec'd across 600 ohm impedance.  VU was used in radio
Broadcast consoles while the dBmw was in the phone company audio trade.  The
VU was damped in a meter having a certain ballistic characteristic, to more
easily judge speech and music levels.
73,
Stuart
K5KVH

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