Denon 3800BD - Manual (Page 8)

Ver.3.09
2) When a command is abnormally received ( with or without an answer parameter )
Command Transmitted
CC
PC0
PC1
PC2
PCn
BCC
STX
ETX
NAK
CC
PC0
STX
NAK return
Error Check NG
Command Retransmitted
HOST UNIT
MAX
40ms MAX
100ms