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AD9985 output operation

Hello all,

Please let me know your advice about below operation.

1: AD9985 outputs HSYNC signal and clock (about 35 ~44MHz) when camera cable is connected and camera power supply is off.

2: Clock (35MHz) and HSYNC signal is stopped if camera cable is unplugged.

 

Why does AD9985 output clock (35MHz) and HSYNC signal though video signal does not input to AD9985 in above 1 and 2 ?

Please let me know if above operation includes any problem or not.

daisu

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