Hi Team,
I want to use the LMK051318b in order to synchronize remote system and regenerate the 10MHz clock
First I've made some tests with the eval board and I'm facing trouble with BAW Lock frequency detection.
With TICS Pro:
I set the board in free run, APLL1 running, DPPL and APLL are desactivated
XO input is set in SE (50Ohms), OUT1 is set in HCL(50Ohms) mode.
STAT0_SEL is set to PLL1 Digital Lock Detect
STAT1_SEL is set to XO Input Loss of Signal
XO is connected to a RF generator
Tests:
When the RF signal is 10.000MHz applyed to XO, the LMK locks and operates correctly, the signals on OUT1 and XO are in phasis, STAT0_SEL is high (showing the APLL1 is locked)
When I move of few thenth of Hertz the frequency applied on XO, the OUT1 remain in phasis with XO, the APLL1 is still locked
BUT, If I move widely the frequency applied on XO, the OUT1 and XO are no more in phasis, the APLL is unlocked, the trouble is that STAT0_SEL remains high!
I've tried to change BAW Lock detect parameters, but with any value tested (from 5 to 500ppm) the PLL1 Digital Lock Detect remains high whatever the XO frequency is...
Please could you help me to solve this problem ?
Many thanks
Christian