Jim Jarvis wrote:
> 1) What's s9? I've got references indicating 50uV or 100uV.
It's 50 uV into 50 Ohm load.
Unloaded generator has 100 uV.
> 100uV plus 60dB is....gee...100V! A very large signal, indeed.
100uV plus 60dB is 100 mV.
> A mere 30dB down from 100uV brings you to .1uV
It takes 60 dB from 100 uV to 0.1 uV.
> 2) Who among us has a receiver which is calibrated in dBm?
I dream about it :-)
> Who among us trusts the logarithmic calibration of their
> wiffy-unit meter, really? And over how many decades of
> its range? (regardless of indicated units.)
My MkV can be reasonably trusted on 14 MHz from S8 to S9+50 dB
with preamp on and attenuator off.
> 5) Interesting if the new Tentec claims -140dBc/Hz noise output.
> Add 10dB for an amp..still impressive
Preamplifier has nothing to do with phase-noise specification.
73,
Sinisa YT1NT, VA3TTN
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