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LMX2595EVM: Synchronise OSCin to output

Part Number: LMX2595EVM
Other Parts Discussed in Thread: LMX2595

Hi,

I have an LMX2595 EVM board and an external oscillator that operates at 80.5 MHz. I would like to use the LMX2595 board to produce a 40.25 MHz output (i.e. divide the input frequency by 2). To achieve this the board uses the internal VCO but the output is no synchronized with the input signal. How can I achieve synchronization between the input (“OSCin”) and the output (“RFoutA”)?