Denon 3800BD - Manual (Page 9)

Ver.3.09
3) When a command with an answer parameter is normally received ( unit ) and an
answer is abnormally received ( host )
Command Transmitted
CC
PC0
PC1
PC2
PCn
BCC
STX
ETX
STX
NAK
Answer Transmitted
Error Check OK
HOST UNIT
AC
PC0
PC1
PCn
ETX
BCC
RC
STX
Answer
Retransmitted
AC
PC0
PC1
RC
Error Check NG
MAX
40ms
MAX
5 s
MAX
5s