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DAC37J84: Small Fraction Delay FIR Filter

Part Number: DAC37J84

I am generating two 100 MHz signal from DAC37J84 EVM channel A and B and measuring these in an oscillioscope. As shown in the below figure, I (channel A from DAC) is in green and Q (channel B from DAC) is in blue. 

There are certain issues which I have observed regarding the small fraction delay block -

1. Enabling the small fraction delay makes the channel go into saturation. As shown in the figure below, the signal is getting clipped and becoming a square wave. To make it sinusoidal again, I need to reduce the QMC gain. Is it how the small fraction delay normally functions?

2. The small fraction delay is inverting the channels i.e. I is in blue and Q is in green as shown below. Is this how the small fraction delay normally functions?