Ok, i got it. All references when not given are 0db = 1w
Thanks
Sent from my Verizon, Samsung Galaxy smartphone
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-------- Original message --------
From: "W0LEV via groups.io" <davearea51a@...>
Date: 3/20/25 2:39 PM (GMT-05:00)
Subject: Re: [tinysa] What accessories do I need for a TinySA Ultra?
QUOTE:? So, the TinySA is probably relative to mW or -10db down from 0.001W = 0.1mW or 0.0001W ?
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NO???? N O.........?
NO..... N O????????? Just POWERS OF 10 ! !
1 Watt = 1.00.... Watts = 0 dBW = +30 dBm
1 milliwatt = 0.001 Watts = 0 dBm = -30 dBW
0.10 milliwatt = 0.0001 Watts = -10 dBm = -40 dBW
0.01 milliwatts = 0.00001 Watts = -20 dBm = - 50 dBW
0.001 milliwatts = 0.000001 Watts = -30 dBm = -60 dBW
All powers of 10 which you learned in Jr. High School.
BTW:? dB directly adds and substracts.?
Dave - W?LEV
So, the TinySA is probably relative to mW or -10db down from 0.001W = 0.1mW or 0.0001W ?
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------
Date: 3/20/25 1:36 PM (GMT-05:00)
Subject: Re: [tinysa] What accessories do I need for a TinySA Ultra?
The standard of power measurement for most things RF these days is the:
??? Watt or dBW
??? Milliwatt or dBm
This assumes measurements are made in a non-reactive (resistive only) 50-ohm system.? That leaves our 75-ohm TV associates in the dark.? So be it.? The fast majority of the RF and ?W industries uses the 50-ohm standard.
With these abbreviations, please note the PROPER capitalizations as well!!!? W is after Mr. Watt.? m is just a standard abbreviation for a power of 10 or 0.001.
Dave - W?LEV?
Quick dumb question.
Since db is a relative measurement of power, in this case,? and I'm not sure to what standard that is, what units are tinySA db relative to?
mW, W, uW or voltage or current level ratio(s)?
?
ie:in the case of 5w output and 1w input would be a gain of:
10log10(POUT/PIN)=10log10(5)≈7?dB
I would be thinking it is a maximum input voltage level like approx 3.5v as the new mos chip level inputs?
?
Thanks
Stan W8SRD
?
?
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