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Regarding square wave (~7.8125 kHz) is present at RCLK_OUT (J3) - ADA2200


I have started to use an ADA2200 for the purpose of employing it as a Lock-in Amplifier. 

For starting the operation, I am following the document - ADA2200SDP-EVALZ (Rev. 0) (

On page 3, point no. 8, it is mentioned that "Verify that a square wave (~7.8125 kHz) is present at RCLK_OUT (J3). Connect RCLK_OUT to VINP (J7) with an SMA cable".

I am doing that, but getting a frequency of around 63 kHz. I am not sure why this is happening. I would be grateful if you could kindly help me sort this out. 

Thank you in advance 

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[edited by: Shaumik at 11:57 AM (GMT -5) on 1 Mar 2022]
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