E
eeh
- Jan 1, 1970
- 0
Hi,
Could anyone tell me how to calculate 20W in dbm? Is it equal to
10log(20/0.001)?
Thanks!
Could anyone tell me how to calculate 20W in dbm? Is it equal to
10log(20/0.001)?
Thanks!
eeh said:Hi,
Could anyone tell me how to calculate 20W in dbm? Is it equal to
10log(20/0.001)?
Pooh said:eeh wrote:
Yup.
Ted said:Shouldn't that be 10*10log(20/0.001)?
Ted
eeh said:Hi,
Could anyone tell me how to calculate 20W in dbm? Is it equal to
10log(20/0.001)?
Walter said:Although the answers you've gotten are fine, this seems like kind of
an odd question to be asking in the first place. The sort of systems
(line-level audio) that are specified in dBm don't usually involve
power levels anywhere near 20W.
Shouldn't that be 10*10log(20/0.001)?
What he said....we care always using dbm and dbW in satellite comm's.Paul said:It's quite common in RF technology also, and 20W is not exactly super
power...
Paul
Ted said:Shouldn't that be 10*10log(20/0.001)?
Although the answers you've gotten are fine, this seems like kind of an odd
question to be asking in the first place. The sort of systems (line-level
audio) that are specified in dBm don't usually involve power levels anywhere
near 20W. Indeed, dBm is kind of an obsolete measurement, even for audio;
Walter said:Although the answers you've gotten are fine, this seems like kind of an odd
question to be asking in the first place. The sort of systems (line-level
audio) that are specified in dBm don't usually involve power levels anywhere
near 20W. Indeed, dBm is kind of an obsolete measurement, even for audio;
more commonly these days, we see dBu, which is essentially a voltage
measurement rather than a power measurement. (0dBu = 0.7748V, which happens
to be the voltage that would produce 1mW into a 600 ohm load.)
Are you sure you're asking the right question? What is the context?
Dave said:[...]
In "low power" RF engineering, dBm is *much* more commonly used to
indicate power than any other unit [...]
More like 10*log10(20/0.001) if you like but since ln is normally used
for natural logs then log without a suffix may be reasonably taken to
mean base10.