glitches in samples

Question

Hi, 
 the samples have glitches. one -Ve glitch followed by a +Ve one. 
 
 when ADC data is set to ramp (register 0x0550, 0x0F) the glitches occur at a regular interval. every 64 samples. 
 L = 2, M = 2, F = 2, K = 32, scrambler off. FACI turned off or turned on produces same results 
 could some one help me out please? 
 
 thanks and regards, 
 joseph

s.ilke · Accepted Answer

when 0x0550 is set x0F, it is ramp output like below. 
 clock = 625MHz 
 full bandwidth mode 
 L=2, M = 2, N' = 16 
 lane rate 12.5Gbps (0x056E is set to 0x00 for lane rate 6.75 Gbps to 13.5 Gbps))

jpathiku · Answer

back after holidays - a fresh look showed that samples were sliced wrongly. (the ms byte of of one sample was combined with the ls byte of adjacent sample) and this causes the "glitch" 
 in hindsight, the issue is somewhat "obvious" and it is curious that this forum or the ADI staff has not offered any help in this instance.

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glitches in samples