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Hittite HMC-T2220 PLL loss of lock

Question asked by xwliu on Mar 9, 2018
Latest reply on Mar 19, 2018 by Jarrett_Liner

I have a Hittite HMC-T2220 microwave signal generator, but now it displays a "L" on screen, which means “PLL loss of lock" in user's manual, and the output power of it is not right. Is it broken and needs a factory maintenance, or can I do something to fix it?