SIGNATURE 2.0 (serv.man11) - Harman Kardon Audio User Guide / Operation Manual. Page 17

SIGNATURE

 

B

US 

P

ROTOCOL 

M

ASTER 

D

OCUMENT

Revised 2-24-98

Page 17 of 20

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

06h

7Eh

75h

See below 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

20h

30h

01h

01h

02h

Computed

7Eh

75h

See below See page 7

char

bass_eq;

// bass EQ level

char

hi_eq;

// treble cut level

char

centr_mod;

// center mode

char

surr_mod;

// surr mode

char

centr_lvl_mod;

// level modifier for current center mode

char

surr_lvl_mod;

// level modifier for current surround mode

signed char

sub_lvl_mod;

// level modifier for subwoofer

Balance_st

balance;

// balance data

signed char  

lrBal;

// item to be adjusted

signed char

fbBal;

//

The Contents of Volatile Memory Request command causes the Target unit to transmit, in
the response, the contents of its volatile memory.  Two values are included in the data
segment of the command: an “Offset” data word that determines how many bytes from the
beginning of the Volatile memory structure that the desired data begins, and a “Length” data
word that determines the total number of bytes to be transmitted back to the Source unit.

NOTE: sending a “Length” data word value of zero will cause the Target unit to respond
with the rest of the structure (from offset to the end) - the number of bytes returned in the
response will reflect the actual number of bytes involved.