SIGNATURE 2.0 (serv.man11) - Harman Kardon Audio User Guide / Operation Manual. Page 7

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SIGNATURE
 
B
US 
P
ROTOCOL 
M
ASTER 
D
OCUMENT
Revised 2-24-98
Page 7 of 20
E
XAMPLE OF 
M
ESSAGE 
C
REATION
Create a Power On command from a Signature 3.0 to a Signature 2.0
in a single 2.0 / single 3.0 system.
Preamble = 7Eh
Length = 03h
Modifier = 01h
Target Device Type = 20h
   0111 1110b (7Eh)
   0010 0000b (20h)
   0000 0001b (01h)
   0011 0000b (30h)
   0000 0001b (01h)
   0000 0011b (03h)
   0000 0001b (01h)
   0000 0010b (02h)
+ 0000 0001b (01h)
0 1101 0111b (sum = 0D7h)
   1101 0111b (truncating = D7h)
   0010 1000b (inverting bits = 28h)
   0010 1000b (28h 
≠
 7Eh, so don’t add 01h)
Checksum = 28h
Command = 02h
Target Unit ID = 01h
Source Device Type = 30h
Source Unit ID = 01h
Data = 01h
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
30h
20h
01h
01h
01h
03h
7Eh
02h
01h
28h
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