Ubiquity Access Point Experience

Howard K2AQ

Have a question for the community. I have tracked down 2 signals coming from my Ubiquity UAP-AC-LR access points, one at about 3.547 and another at 3.565 on the 6600M/ V3. 

They are classic SMPS signatures.... drift/ dancing etc. see pic below. I can make them come and go at will by removing their power. 

I have replaced the provided Ubiquity POE SMPS with a linear power supply. 

Extensively choking of the Ethernet cable on both ends (well above the threshold Z via mix 31 & 75) provided no reduction in signal amplitude.  Just keeping them powered up, with Ethernet cable at switch disconnected creates these signals. 

I am guessing there is another SMPS inside for 3.3 VDC for the internal circuitry that is radiating.

Before opening the case and sniffing around with the spectrum analyzer and probes, thought I would inquire to determine if anyone had this experience or point out if I have missed something. 

Any input would be appreciated

73

Howard K2AQ

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