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LMX2572: Application problems

Part Number: LMX2572

Hi team,

my customer is using LMX2572 and they are having problems as below:

1. Are the frequency ranges of RFoutA and RFoutB in different modes as shown in the following figure: 

Fvcomax=6400MHz, so the fsysref max= 400MHz(Actually the maximum frequency of interpolator is 187.5MHz)

2. What are the requirements for RFoutB to use SysRef mode? The software was configured in accordance with the manual during our commissioning and tried to give SysRefReq a raise level, still no signal output; 

3. Can RFoutB continuously output a signal of a certain frequency and what are the conditions for continuous output? Can the output frequency be larger, for example, more than 500MHz?