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HMC700 SPUR

Question asked by HuTer on Jan 11, 2018
Latest reply on Jan 15, 2018 by HuTer

Hello, 
Can anyone help to analyze the causes and solutions of spur  shown in the attached picture?.

Using HMC700 + VCO55CC(2350-2750), Active filter Type C, Fpd=52.083MHz, Fref=156.25MHz Crsytek, Fout=2.5GHz. 
As we decrease the Fpd, the spurs gets nearer to the carrier frequency. 

This spur appeared for wide loop filter bandwidth, and for narrow loop filter bandwidth.

Best Regards,

HuTer

 

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