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AWR1243: 40MHz crystal oscillator of AWR1243 chip

Part Number: AWR1243

Hi,
I am interested in purchasing the awr1243 for radar  applications.these days i have got some problems, detaily as follows


1) I directly charged the 1.3-V power port with a 1.3V  but the 40MHz crystal oscillator not work,what could be the problem ? As we know that for the 1.3-V power port there's a  1-V bypass mode,Does the problem have anything to do with it ?Or must it be controlled? How to control it ?

2) When the AWR1243 chip is used in Slave mode.the clock of CLKP is provided by outside,then the CLKM pin needs to be grounded.Can the CLKM pin be directly grounded or must be grouned through the capacitor AC?