[NLRS] CONVERT 30mV to dB and mW

[jcplatt1 at mmm.com]

Kris KC0REO wrote:
> Looking to convert 30mV to db or mW. This 30mV, is the output level
printed
in the manual for the transverter port on an IC-735.

http://www.mini-circuits.com/dg03-110.pdf


..... and note that its assumes we are talking about a 50 ohm load in that
PDF file.  If the load is something other than 50 ohms, then the conversion
table is wrong.

Also note dB itself is unitless because it is a ratio of two values.
Sometimes we add a third character like "m" as in "dBm" in which case its
referenced to something .... for dBm, 0 dBm is by definition 1 mW into a 50
ohm load.

For the IC-735, assuming a 50 ohm system, that 30mV is about -17dBm (17 dB
less than 1 mW), or about 0.02mW (20 microwatts).   I had heard that the
Icom transverter ports have very low output power.   If you need more power
to drive a transverter, you may need to add some more gain stages.
Perhaps DEM has a way to do this.

73, Jon
W0ZQ