Why does the ARRL lab test show the KX3 TX phase noise as about -124
dBc/Hz (Fig 5 of their report) and Sherwood show this as -144 dBc/Hz,
both at 10 kHz spacing? That is a huge difference.
The ARRL report shows that the KX3 never goes below about -135 dBc/Hz,
even 1 MHz away.
Is there an update to the ARRL lab test? Did the ARRL miss this one?
FWIW, ARRL shows the K3 at about -142 and the FTdx5000 at -135, at 10
kHz spacing.
73 de dave
ab9ca/4
On 4/2/14 7:40 AM, Larry Lopez wrote:
http://www.sherweng.com/table.html
The LO Noise (dBc/Hz):
144 KX3
138 K3
130 R390A
121 FT-1000D
117 ICOM 720A
I'm wondering why the KX3 Lo noise is so much better than the K3.
The R390A value strange since the first local oscillator is a quartz
crystal.
I've owned a Icom 720A and own a FT-1000D.
Ive never owned a K3, KX3 or a R390A.
Larry
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