Question for LMX2571 lock detection.
Lock detect changes from L to H when frequency is changed in a high temperature environment (over 60°C)
On the other hand, it becomes L in about 1ms after turning H, and it becomes unlocked.
When fout was observed with a spectrum analyzer, the frequency was set
Frequency. Symptom occurs when internal VCO switching occurs
It seems to be awake.
VCO_SEL_STRT in R46 is set to Disabled.
① Why is it unlocked
② proposed countermeasures
I would like to ask you to teach us.