Strange jitter in Verb +R 16x

I have strange jitter scan from DVD+R 16x writed 16x on Pioneer DVR-111
I use plextor 760a for scaning.
I buy 4 different cake Verb +R made in india and all have that jittter…where is the problem???
Can someone make beta/jitter scan in plextor 760, Verb +R (mcc004) writed on pioneer dvr-111 at 16x??