[ICOM] IC-7000 AM Modulation Problem

[D C *Mac* Macdonald]

dB   ARE   dB.  They are identical in absolute quantity.
The difference is that they are derived differently for
voltage, current and power.  The formulas for computing
dB are different, but the absolute difference in dB between
two signals will be the same if calculated with the correct
formula.

Application of Ohms Law will show that doubling the
applied voltage will also double the current, resulting in
quadrupling of the power.  Figure dB change for any
of these three specific quantities with the correct
formula will give the same result.


Mac - K2GKK/5



----Original Message Follows----
From: C Whitaker <whitaker at pa.net>
Reply-To: ICOM Reflector <icom at mailman.qth.net>
To: ICOM Reflector <icom at mailman.qth.net>
Subject: Re: [ICOM] IC-7000 AM Modulation Problem
Date: Fri, 07 Apr 2006 14:20:06 -0400

de WB2CPN

I wonder if we get confused when we're calculating
dB when we don't consider whether it's Voltage dB
or Power dB, there being considerable difference in
the numbers.

73  Clete




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