The narrow bar is PEP (peak envelope power) with a long time constant.
The solid bar is effectively also PEP, but with a shorter time constant
so you can see what the modulation/keying is doing.
By the way, in the radio industry, the term "peak" is used in more than
one sense, which can be confusing. PEP is the peak of the transmitted
power, which is computed from the RMS value of the RF voltage, not the
peak value.
For example, on an oscilloscope display you see the peaks of the sine
waves, which are sqrt(2) = 1.414 times the RMS voltage. To use an
oscilloscope to measure RF power (PEP or average) you have to divide the
peak voltage by sqrt(2) before using the formula P = E^2 / R.
Alan N1AL
On 08/21/2015 08:43 AM, Chester Alderman wrote:
Mke....
I am not absolutely sure about this, but on page 29 of the Rev. E, July
14,2015 'High Performance Panadapter' manual, in the second column it states
"The power output bar graph shows both the current power with the moving bar
and the peak power achieved with a narrow bar." The insinuation is the
'moving bar' indicates RMS power and then states that the single narrow bar
indicates 'peak' power? Hopefully Elecraft will soon clarify this for us.
73,
Tom - W4BQF
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