Harman Kardon SIG2.0, Instruction & Operation Manual

Page: 8 / 19

SIGNATURE B
US
P
ROTOCOL
M
ASTER
D
OCUMENT
Revised 2-24-98
Page 8 of 20
A
CKNOWLEDGMENT
C
OMMAND
:
A
CKNOWLEDGE
:
Source
Device Type
Target
Device Type
Target
Unit ID
Source
Unit ID
Command
Modifier
Data
Length
Preamble
Byte
Command
Byte
Data
Byte(s)
Checksum
Byte
30 h 20 h 01 h 01 h 01 h
Computed
7E h
Command Data See page 7
Source
Device Type
Target
Device Type
Target
Unit ID
Source
Unit ID
Command
Modifier
Data
Length
Preamble
Byte
Command
Byte
Data
Byte(s)
Checksum
Byte
20 h 30 h 01 h 01 h 02 h 02 h 7E h
See Below None See page 7
The acknowledge Command Byte is formed by adding 80 h to the received Command Byte.
Example:
HEX
COMMAND DESCRIPTION
05 Command to Mute
85 Acknowledge
The receiving unit transmits the “Acknowledge” response to let the sending unit know that
the message has been successfully received.
The Data Byte(s) are not included in the Acknowledge message.
An Acknowledge is required after EVERY message sent, in either direction.