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HMC702LP6E Lock Detect issue

Question asked by Heisenber on Jun 14, 2018
Latest reply on Jun 20, 2018 by dyoung1

Part of register setting:

Reg 01h<14> = 1

Reg 1Ah<9:0> = 40h ;     Reg 1Ah<11:10> = 1:1 ;     Reg 1Ah<13:12> = 1:0;    Reg 1Ah<19:14> = 0h ;

Reg 1Bh<3:0> = 2h ;

Accroding to data sheet( if I dont understand anything wrong), the pin 33(LD_SDO) would always output the lock detect signal in this setting.

However, when I have gotten the locked signal through Spectrum Analyzer, the pin 33 still would not output a high level singal. So where is the problem?

 

Thank you!

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