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Strong signal at or near 4.24MHz
George Moranian
Member
With no antenna connected and dummy loads attached to both Ant. ports I am getting a very strong signal at or near 4.240 MHZ
The only items attached to my 6600 with v3.1.8.145 is the ethernet connection and power from a battery. (to eliminate possible switcher freq.)
Has any one else seen this? Is this a internal oscillator/LO generating this, or possibly computer generated through the Ethernet connection?
George N1NAZ
The only items attached to my 6600 with v3.1.8.145 is the ethernet connection and power from a battery. (to eliminate possible switcher freq.)
Has any one else seen this? Is this a internal oscillator/LO generating this, or possibly computer generated through the Ethernet connection?
George N1NAZ
0
Comments
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Hi George,
Here is a link to discussion about this spur. In a nutshell - it is internal.
https://community.flexradio.com/flexradio/topics/strong-spur-at-4241-khz
0 -
It's the noise from an internal voltage switcher. Since the radio is only guaranteed to be internal noise-free in the ham bands, I am afraid there isn't much that can be done about it.
Mike va3mw0
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