[Elecraft] PX3 internal spurious

[Rooby]

<http://elecraft.365791.n2.nabble.com/file/t394210/P1100545.jpg> Hello

I have some internal spurious on my PX3. Is this normal?
How can I get rid of this spurious? Does someone has found the internal
cause e.g. DC/DC converter, clocking etc. and has some suggestions for
shieldings, blocking caps etc.?
I have connected the PX3 to a battery and nothing on the RX I/Q input so
these spurious are only internal.
 



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