Re: Transmit Phase Noise

Rob Sherwood
 

If anyone wants a PDF of the data, please send me an email direct to rob@...

Rob

-----Original Message-----
From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of Lou Kolb
Sent: Saturday, January 12, 2019 12:43 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Transmit Phase Noise



Thanks, Rob. Putting it into text made it accessible to those of us
using screen readers. Lou WA3MIX

On 1/12/19, Rob Sherwood <rob@...> wrote:
Here is some data I have at both 100 watts and 30 or 35 watts for six rigs.
Different lab, different measuring equipment, different rig samples, so
don't expect absolute correlation with ARRL data.
ARRL lab data only measures phase noise, not composite noise (phase and AM
noise).
Data from Contest University presentations of mine.
Note: While the listing are sorted by column 1, the ranking varies with
frequency offset.
Rob
NC0B

Transmit Composite Noise Rig Comparisons 20 meters
Best at maximum power output, but degrades at lower power levels

Rig @ 100 watts 10 kHz offset, dBc/Hz 20 kHz offset, dBc/Hz 100 kHz offset, dBc/Hz
K3S -141 n/a -143
IC-7300 -130 n/a -132
IC-7851 -129 n/a -138
IC-7610 -127 -129 n/a
TS-890S -120 -129 n/a
FTdx-3000 -120 n/a -121

Rig @ 30 watts 10 kHz offset, dBc/Hz 20 kHz offset, dBc/Hz 100 kHz offset, dBc/Hz
K3S -132 n/a -140
IC-7851 -123 n/a -133
IC-7610 -122* -124* n/a
FTdx-3000 -117 n/a -117
TS-890S -113* -122* n/a
IC-7300 -112 n/a -120

* = Power level was 35 watts
n/a = data not available
Rev D

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