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Why does the frequency of Tx LO is unstable observed from frequency spectrograph

Question asked by Jess-J on Jul 3, 2018
Latest reply on Jul 3, 2018 by Jess-J

Hello everyone,

I observed frequency of Tx LO from frequency spectrograph, when I set SPAN is 100Hz, I observed frequency is unstable and jumped back and forth. And the jump range is ±20Hz. Is anything wrong with register set?


I am really need your help. And look forward to hearing from you.