In message , Jeff
writes

It is an easy mistake to make, because dB relative to a microvolt is often
written as dBu rather than
using the Greek letter 'mu'; a limitation of the ASCII character set!!

Jeff


dB relative to a microvolt is written as dBuV, so there need be no
confusion.


Well I am afraid that RF engineers are a lazy breed and it is often written
as dBu, much in the same way as dBm.

Jeff


After 41 years in the cable TV industry, I've NEVER seen dBmV or dBμV
written abbreviated. Spoken, you occasionally hear only 'dB' from the
careless.
Ian.
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