Cambridge Audio Azur 840A V2, Azur 840E, Azur 840A V1 Supplementary Manual

Gallery Court, Hankey Place, London SE1 4BB England Tel: [phone] Fax: [phone] Web: www.cambridge-audio.com

Azur 840A (V1 & V2) and 840E Serial Control Protocol V1.1

1.1 RS232 Protocol

The protocol is accessed via COM1 i.e. the rear panel RS232C port.

1.2 Command Format

Header

Command Command Command

Footer

Group Number Data

# 1 to 6 , 01 to 18 , XXXX CR

byte num: 1 1 1 2 1 XX 1

Notes:

All data consists of ASCII bytes.
Settings for RS232 comm port are 9600,N,8,1 with no handshaking.
CR is carriage return, ASCII value 13 decimal.
Command Data consists of 10 characters maximum.

1.3 Command Groups

Commands are split into the following groups:

Command

Description

Group

1 Control Commands
2 Setup Commands
3 Replies from Setup Commands
4 Replies from Control Commands and Updates
5 Error Messages

Gallery Court, Hankey Place, London SE1 4BB England Tel: [phone] Fax: [phone] Web: www.cambridge-audio.com

1.4 Commands and Messages

1.4.1 Group 1 - Control Commands

Command

Command Description Command Data Example

Number

01 to 07 Main Input Selects No Data #1,02,\r - Select Input 2
08 Tape Monitor 0 - Off, 1 - On #1,08,1\r - Tape monitor on
09 Main Input Up No Data #1,09,\r - Next input up
10 Main Input Down No Data #1,10,\r -Next input down
11 Power State 0 - Standby, 1 - On #1,11,0\r - Put 840A in standby
12 Mute State 0 - Mute Off, 1 - Mute On #1,12,1\r - Mute volume
13 Goto Volume 00 to 72 - Volume Level #1,13,10\r - Set volume to 10

Note - For 840A V1 : 00:min, 72:max

For 840A V2 & 840E : 00:min, 96:max
14 Volume Up No Data #1,14,\r - Start volume up
15 Volume Down No Data #1,15,\r - Start volume down
16 Volume Stop No Data #1,16,\r -Stop volume changing
17 Set Balance 00 to 16 - Balance Level #1,17,08\r -Balance neutral
Note - 00:max left, 08:neutral, 16:max right
18 Balance Right No Data #1,18,\r -Balance right
19 Balance Left No Data #1,19,\r -Balance left
20 LCD Brightness 0 - Off, 1 - Dim, 2 - Bright #1,20,2\r - LCD bright
21 Speaker Select 0 - A, 1 - AB, 2 – B (840A V1 & V2 only) #1,21,1\r - Speaker AB

23 Abus Input Select 1 - Input 1, 2 - Input 2, 3 - Input 3, 4 - Input 4,

5 - Input 5, 6 - Input 6, 7 - Input 7,

8 - Tape Monitor

#1,23,7\r - Select Abus input 7

24 Set Bass 00 to 30 - Bass Level

Note - 00:min, 15:neutral, 30:max

#1,24,15\r -Bass neutral

25 Set Treble 00 to 30 - Treble Level

Note - 00:min, 15:neutral, 30:max

#1,25,15\r -Treble neutral

26 Set Direct 0 - Off, 1 - On #1,26,1\r - Direct on