Faults in EVAL AD2S1210

Question

Hi, 
 I am using EVAL AD2S1210 Board with Arduino. 
 I am able to write the registers and read angle from EVAL Board using Arduino. 
 Even though Angles are reading correctly, Always board is showing LOT and DOS faults. I tried clearing fault register as well. But still this 2 faults are always in the board. 
 Please suggest me a way to clear this faults. 
 Also want to know the use of resistors R22 and R21 which are in the paths of sin and cosine signals.

@skowalik · Accepted Answer

tpsamuel, 
 These waveforms are severely distorted and depending on what exactly I'm looking at may not have sufficient amplitude to avoid tripping the LOS threshold. Also it appears that this waveform is centered around ground which would cause the clipping fault D7 to be set as well. 
 Can you share with me how you are connecting the resolver or resolver simulator to the inputs. That may provide some insight as to what is going wrong. 
 Sean)

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Faults in EVAL AD2S1210