

TH2S
vt0("vt0","",500,1000,2000,500,900,1900)
tt->Draw("VTDC0[0]:VTDC0[3]>>vt0","","colz")

H2S
ft0("ft0","",350,250,600,350,200,550)
tt->Draw("TDC08[51]:TDC08[48]>>ft0","","colz")

tt->Draw("VTDC0[3]:TDC08[48]>>vft0","","colz")

tt->Draw("TDC08[48]>>h1")
Significant differential nonlinearity (x=432)

tt->Draw("VTDC0[3]>>h1")
Perfect.