Transmit Phase Noise

Rob Sherwood
 

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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