Marantz RS-232C Specification page 9

UD/BD
4) When a command with an answer parameter is normally received ( unit ) and an answer is
normally received with ETB ( host )
Command Transmitted
Error Check OK
RS-232C Control Specification
HOST
MAX
40ms
Company Restricted
UNIT
STX
CC
PC0
PC1
PC2
PCn
ETX
BCC
STX
RC
AC
PC0
PC1
PCn
ETB
BCC
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Document Version [1.0]
Error Check OK
MAX
5s
Answer Transmitted