Other Parts Discussed in Thread: LMX2820
Hi Team,
1) As per the manual, the original time for the LMX2820 without auxiliary calibration is 153 μs:
However, the customer simulated this process in TICs Pro under the following test conditions:
Test Method: Only change the position in the figure, no change in other locations, and all shadow registers are turned on, and the low pulse width of the TP_LD pin is captured with an oscilloscope.
The calibration time has reached 200us. Then the customer also tried the frequency hopping time of 45M-55M and the calibration time was over 350us.
2) There is no signal at low frequencies:
Figure 1. when Divider is not used
Figure 2. when Divider is being used
When using divider mode, there is no signal. The voltages associated with the peripheral circuits are good. What might be the possible cause?
Could you please help check this case? Thanks.
Best Regards,
Cherry
