Cambridge Audio azur 840A Supplementary Guide

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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

Cambridge Audio azur 840A Specifications

General

Signal to Noise Ratio	> 93dB (unweighted)
Input Impedance	47k Ohms
Power Output	120W RMS per channel (8 Ohms), 200W RMS per channel (4 Ohms)
Total Harmonic Distortion	<0.001% at 1kHz
Frequency Response	5Hz - 50kHz (±1dB)
Power Consumption	750W max
Damping Factor	>100
Weight	15kg (33lbs)