On 08/03/2015 12:35 PM, John Ackermann N8UR wrote:
It might be helpful to clarify that since this is a voltage ratio,
it's 20log rather than the 10log used for power (e.g., doubling
voltage is 6dB, doubling power is 3dB), so the scaling will look
different than a typical spectrum analyzer. (It would be nice if the
instrumentation blocks could have an option to select voltage, or
power into 50 or 75 ohms...)
Yes, and we need 50 ohm and 75 ohm terminator blocks in GRC..... :) :)
But, seriously, one can always prefix any instrumentation block with a
scaling function in the ax + b form with a multiplier and adder to
achieve whatever
pleasant-and-convenient scaling one wants.
On 8/3/2015 12:27 PM, Marcus D. Leech wrote:
On 08/03/2015 12:24 PM, Martin Braun wrote:
This pops up a lot, and hence earned a spot on the FAQ a while back:
http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#How-do-I-know-the-exact-voltagepower-of-my-received-input-signal
...although that section could surely be expanded.
M
I just did so :)
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