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LMX2572EVM: Need an extra device?

Part Number: LMX2572EVM
Other Parts Discussed in Thread: ADS5409EVM,

Hello, I need to provide a 1GHz clock for my ADS5409EVM board and I decided to buy the LMX2572EVM board. But do I need to buy another external card for this card? Does the LMX2572EVM have its own crystal inside? If I need to buy an external card, do you have a direct 1GHz clock card recommendation instead of this card?