Arcam SA20 Quick start guide

Custom Installation Notes
IP/Serial programming interface and
IR remote control commands for the
SA10/SA20 integrated amplifier
INTEGRATED AMPLIFIER
POWERSATCDBDAVPVRSTBMUTE AUX PHONOAUX
PHONES

2
Applicability
This document applies to the Arcam SA10/SA20 integrated amplifiers.
Revision history
Issue A.0: Initial revision
Issue B.0: Correction to 0x58
Controlling via RS232/NET ............................................3
Introduction ................................................................................... 3
Set-up................................................................................................ 3
Conventions ................................................................................... 3
Serial cable specification........................................................... 3
Data transfer format.................................................................... 3
Command and response formats.......................................... 3
AMX Duet™ support.................................................................... 4
System Command Specifications ...............................5
Power (0x00)................................................................................... 5
Display brightness (0x01).......................................................... 5
Headphones (0x02)..................................................................... 6
Software version (0x04)............................................................. 6
Factory reset (0x05)..................................................................... 7
Simulate RC5 IR command (0x08)......................................... 7
Volume (0x0D)............................................................................... 8
Mute/unmute (0x0E)................................................................... 8
Current input source (0x1D) .................................................... 9
Headphone override (0x1F)..................................................... 9
Heartbeat (0x25).........................................................................10
Reboot (0x26) ..............................................................................10
Balance (0x3B) .............................................................................11
Incoming audio sample rate (0x44)....................................11
DC offset (0x51)...........................................................................12
Short circuit status (0x52) (SA20 only)...............................12
Friendly name (0x53)................................................................13
IP address (0x54).........................................................................13
Timeout counter (0x55)...........................................................14
Lifter temperature (0x56) (SA20 Only)...............................14
Output temperature (0x57)....................................................15
Auto shutdown control (0x58)..............................................15
Input detect (0x5A)....................................................................16
Processor mode input (0x5B) ................................................16
Processor mode volume (0x5C) ...........................................17
System status (0x5D).................................................................17
System model (0x5E) ................................................................18
DAC Filter (0x61).........................................................................18
RC5 Command Codes ...................................................19
Basic Functions............................................................................19
Advanced Functions .................................................................19
Contents

3
Introduction
This document describes the remote control protocol for controlling via the RS232/NET interface.
Set-up
IP control is via port 50000 of the IP address of the unit.
Conventions
All hexadecimal numbers begin 0x.
Any character in single quotes gives the ASCII equivalent of a hex value.
<n> represents an unknown or variable number.
Serial cable specification
15
6 9
15
6 9
DB9 Female
DB9 Female
The cable is wired as a null modem:
Connector 1 pin Connector 2 pin Function
2 3 Rx Tx
3 2 Tx Rx
5 5 RS232 Ground
Data transfer format
Transfer rate: 38,400bps
Data format: 8 data bits, 1 stop bit, no parity, no flow control.
Command and response formats
Communication between the remote controller (RC) and the SA10/SA20 takes the form of sequences of bytes, with all commands and responses having the
same basic format. The SA10/SA20 shall always respond to a received command, but may also send messages at other times.
Each transmission by the RC hs the following format:
<St> <Zn> <Cc> <Dl> <Data> <Et>
• St (Start transmission): 0x21 ‘!’
• Zn (Zone number): see below
• Cc (Command code): the code for the command
• Dl (Data length): the number of data items following this item, excluding the Et
• Data: the parameters for the command
• Et (End transmission): 0x0D
Each response by the SA10/SA20 has the following format:
<St> <Zn> <Cc> <Ac> <Dl> <Data> <Et>
• St (Start transmission): 0x21 ‘!’
• Zn (Zone number): see“Zone numbers”, below
• Cc (Command code): the code for the command
• Ac (Answer code): see “Answer codes”, below
• Dl (Data Length): the number of data items following this item, excluding the Et
• Data: the parameters for the response of length n (note that n is limited to 255)
• Et (End transmission): 0x0D
The SA10/SA20 responds to each command from the RC within three seconds. The RC may send further commands before a previous command response has
been received.
Zone numbers
The following zone numbers are defined:
• 0x01 – Zone number 1. (Zone 1 is the master zone. Commands that appear zone-less refer to the master zone)
• 0x02 – Zone number 2
Controlling via RS232/NET

4
Answer codes
The following answer codes are defined:
• 0x00 – Status update.
• 0x82 – Zone Invalid.
• 0x83 – Command not recognised.
• 0x84 – Parameter not recognised.
• 0x85 – Command invalid at this time (see NOTE below)
• 0x86 – Invalid data length.
NOTE: Certain commands cannot be processed when the Setup Menu is being displayed. An answer code of 0x85 will be returned in these circumstances. Also,
commands for tuner control cannot be processed when the tuner input is not selected, etc.
State changes as a result of other inputs
It is possible that the state of the SA10/SA20 may be changed as a result of user input via front panel or remote. Any change resulting from these inputs is
relayed to the RC using the appropriate message type.
Reserved Commands
Commands 0xF0 to 0xFF (inclusive) are reserved for test functions and should never be used.
Example command and response sequence
As an example, the command to simulate the RC5 command “16-16” (increase volume):
St Zn Cc Dl Data 1 Data 2 Et
0x21 0x01 0x08 0x02 0x10 0x10 0x0D
Assuming that the command was accepted by the SA10/SA20 and is being processed, the SA10/SA20 responds to this command with the following sequence:
St Zn Cc Ac Dl Data 1 Data 2 Et
0x21 0x01 0x08 0x00 0x02 0x10 0x10 0x0D
AMX Duet™ support
The SA10/SA20 shall be fully compatible with AMX Duet™ Dynamic Device Discovery Protocol (DDDP). The following description of Dynamic Device Discovery
comes from the AMX website (www.amx.com). Dynamic Device Discovery is part of AMX’s Duet™ platform, which combines the proven reliability and power of
NetLinx® with the extensive capabilities of the Java 2 Micro Edition (J2ME) platform. When integrating a serial or IP device from a manufacturer embedding the
Dynamic Device Discovery Protocol (DDDP), Duet recognizes the device and loads the appropriate Duet module, which automatically installs the new device.
AMX’s NetLinx Master can then find and install the Duet device module either from a library on the master, from AMX’s web site, or from the manufacturer’s web
site. Duet also allows for device swapping so that programming changes are not required when devices with DDDP are removed or replaced – a huge benefit
for end users. The Duet platform is an extension AMX’s InConcert® manufacturer partner program, which was developed to ensure seamless communication
between partners’ devices and the AMX control system.
Data is specified in the ASCII format. All ASCII characters between the quotes“” should be recognised/transmitted.“\r” is a carriage return (0x0D).
Command: “AMX\r”
Response: “AMXB<Device-SDKClass=Amplifier><Device-Make=ARCAM><Device-Model=SA10><Device-Revision=x.y.z>\r”
Response: “AMXB<Device-SDKClass=Amplifier><Device-Make=ARCAM><Device-Model=SA20><Device-Revision=x.y.z>\r”
Where,
x.y.z = RS232 protocol version number.

5
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x01
Dl 0x01
Data 0x00 – Set brightness to off
0x01 – Set brightness to dim
0x02 – Set brightness to full
0xF0 – Request display brightness
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x01
Ac Answer code
Dl 0x01
Data 0x00 – Display brightness is off
0x01 – Display brightness is dim
0x02 – Display brightness is full
Et 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x00
Dl 0x01
Data 0x00 – Power off
0x01 – Power on
0x02 – Power toggle
0xF0 – Request power state
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x00
Ac Answer code
Dl 0x01
Data 0x00 – Zone is in standby
0x01 – Zone is powered on
Et 0x0D
System Command Specifications
Display brightness (0x01)
Set/request the brightness of the front panel display.
Example
Command/response sequence for requesting the brightness of the display
where the display is off:
Command: 0x21 0x01 0x01 0x01 0xF0 0x0D
Response: 0x21 0x01 0x01 0x00 0x01 0x00 0x0D
Power (0x00)
Set/request the stand-by state of a zone.
Example
Command/response sequence to request the power state of the unit where
the unit has power on:
Command: 0x21 0x01 0x00 0x01 0xF0 0x0D
Response: 0x21 0x01 0x00 0x00 0x01 0x01 0x0D

6
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x04
Dl 0x01
Data 0xF0 – request software version
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x04
Ac Answer code
Dl 0x02
Data1 0x?? – major version number
Data2 0x?? – minor version number
Et 0x0D
Software version (0x04)
Request the firmware version
Example
Command/response sequence, where the repsonse is HOST version 1.2:
Command: 0x21 0x01 0x04 0x01 0xF0 0x0D
Response: 0x21 0x01 0x04 0x00 0x02 0x01 0x02 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x02
Dl 0x01
Data 0xF0 – Request current headphone connection status
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x02
Ac Answer code
Dl 0x01 (Data length)
Data 0x00 – Headphones are not connected.
0x01 – Headphones are connected
Et 0x0D
Headphones (0x02)
Determine whether headphones are connected.
Example
Command/response sequence to request the headphone status where the
headphones are not connected:
Command: 0x21 0x01 0x02 0x01 0xF0 0x0D
Response: 0x21 0x01 0x02 0x00 0x01 0x00 0x0D

7
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x05
Dl 0x02
Data1 0xAA (Confirmation data pattern to avoid accidental restore)
Data2 0xAA (Confirmation data pattern to avoid accidental restore)
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x05
Ac Answer code
Dl 0x00
Et 0x0D
Factory reset (0x05)
This command resets the unit to factory defaults.
Example
Command/response sequence for resetting the unit to factory defaults:
Command: 0x21 0x01 0x05 0x02 0xAA 0xAA 0x0D
Response: 0x21 0x01 0x05 0x00 0x00 0x0D
Simulate RC5 IR command (0x08)
Simulate an RC5 command via the RS232 port. An additional status message
will be sent in most cases as a result of the IR command.
Example
Command/response sequence to RC5 16-17 (volume down):
Command: 0x21 0x01 0x08 0x02 0x10 0x11 0x0D
Response: 0x21 0x01 0x08 0x00 0x02 0x10 0x11 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x08
Dl 0x02
Data1 RC5 System code
Data2 RC5 Command code
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x08
Ac Answer code
Dl 0x02
Data1 RC5 System code
Data2 RC5 Command code
Et 0x0D

8
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x0E
Dl 0x01
Data 0x00 – Mute
0x01 – Unmute
0x02 – Mute toggle
0xF0 – Request mute status
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x0E
Ac Answer code
Dl 0x01
Data 0x00 – Muted
0x01 – Unmuted
Et 0x0D
Mute/unmute (0x0E)
Set/Request the mute status of the output.
Example
Command/response sequence for requesting the mute status of output
where the result is unmuted:
Command: 0x21 0x01 0x0E 0x01 0xF0 0x0D
Response: 0x21 0x01 0x0E 0x00 0x01 0x02 0x0D
Volume (0x0D)
Set or request the volume of a zone.
This command returns the volume even if the zone requested is in mute.
The “Request Mute status” command can be used to discover if the zone is
muted.
Response data format:
e.g. for volume 45dB: Data=0x2D (45)
Example
Command/response sequence for setting the volume in Zone 1 to 45dB:
Command: 0x21 0x01 0x0D 0x01 0x2D 0x0D
Response: 0x21 0x01 0x0D 0x00 0x01 0x2D 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x0D
Dl 0x01
Data 0x00 (0) – 0x63 (99) – Set the volume
0xF0 – Request the current volume
0xF1 – Increment volume by 1 step
0xF2 – Decrement volume by 1 step
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x0D
Ac Answer code
Dl 0x01
Data Zone volume, integer value:
0x00 (0) – 0x63 (99)
Et 0x0D

9
Headphone override (0x1F)
Activate/deactivate the mute relays (does not zero the volume).
Example
Command/response sequence to activate the mute relays:
Command: 0x21 0x01 0x1F 0x01 0x01 0x0D
Response: 0x21 0x01 0x1F 0x00 0x01 0x01 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x1F
Dl 0x01
Data 0x00 – Headphone/Over-ride Clear (speakers muted if headphones present)
0x01 – Headphone/Over-ride Set (speakers unmuted if headphones present)
0xF0 - Request Headphone/Over-ride status
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x1F
Ac Answer code
Dl 0x01
Data Relay state
Et 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x1D
Dl 0x01
Data 0x01 – Phono
0x02 – AUX
0x03 – PVR
0x04 – AV
0x05 – STB
0x06 – CD
0x07 – BD
0x08 – SAT
0xF0
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x1D
Ac Answer code
Dl 0x02
Data The current source in the indicated zone:
0x01 – Phono
0x(N)2 – AUX
0x(N)3 – PVR
0x(N)4 – AV
0x(N)5 – STB
0x(N)6 – CD
0x(N)7 – BD
0x(N)8 – SAT
N = 0 indicates source is normal mode
N = 1 indicates source is set to processor (fixed gain) mode
Et 0x0D
Current input source (0x1D)
Set/request the current input source.
Example
Command/response sequence to request the current source for Zone 1
where the source is set to ‘PVR’ and set to processor mode:
Command: 0x21 0x01 0x1D 0x01 0xF0 0x0D
Response: 0x21 0x01 0x1D 0x00 0x01 0x13 0x0D

10
Reboot (0x26)
Forces a reboot of the unit.
Example
Command/response to sending a reboot command:
Command: 0x21 0x01 0x26 0x06 0x52 0x45 0x42 0x4F
0x4F 0x54 0x0D
Response: 0x21 0x01 0x26 0x01 0x00 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x26
Dl 0x06
Data1 0x52
Data2 0x45
Data3 0x42
Data4 0x4F
Data5 0x4F
Data6 0x54
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone Number
Cc 0x26
Ac Answer code
Dl 0x01
Data 0x00 – Response
Et 0x0D
Heartbeat (0x25)
Heartbeat command to check unit is still connected and communicating -
also resets the EuP standby timer.
Example
Command/response to sending a heartbeat command:
Command: 0x21 0x01 0x25 0x01 0xF0 0x0D
Response: 0x21 0x01 0x25 0x00 0x01 0x00 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x25
Dl 0x01
Data 0xF0 – Heartbeat
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone Number
Cc 0x25
Ac Answer code
Dl 0x01
Data 0x00 – Response
Et 0x0D

11
Balance (0x3B)
Adjust the balance control.
Example
Command/response sequence to set the balance 3dB to the left:
Command: 0x21 0x01 0x3B 0x01 0x83 0x0D
Response: 0x21 0x01 0x3B 0x00 0x01 0x83 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x3B
Dl 0x01
Data 0x00 – Set the balance to the centre
0x01 – 0x0C – Set the balance to the right 1, 2, ..., 11, 12
0x81 – 0x8C – Set the balance to the left 1, 2,..., 11, 12
0xF0 – Request current balance
0xF1 – Move the balance right by 1dB
0xF2 – Move the balance left by 1dB
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x3B
Ac Answer code
Dl 0x01
Data 0x00 – Balance is Centred
0x00 – 0x0C – Balance is Right 1, 2,...,11, 12
0x81 – 0x8C – Balance is Left 1, 2,...,11, 12
Et 0x0D
Incoming audio sample rate (0x44)
Request the incoming audio sample rate.
Example
Command/response sequence to request the incoming audio sample rate,
where the rate is 48kHz:
Command: 0x21 0x01 0x44 0x01 0xF0 0x0D
Response: 0x21 0x01 0x44 0x00 0x01 0x02 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x44
Dl 0x01
Data 0xF0 – Request incoming audio sample rate
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x44
Ac Answer code
Dl 0x01
Data Incoming audio sample rate:
0x00 – 32 kHz
0x01 – 44.1 kHz
0x02 – 48 kHz
0x03 – 88.2 kHz
0x04 – 96 kHz
0x05 – 176.4 kHz
0x06 – 192 kHz
0x07 – Unknown
0x08 – Undetected
Et 0x0D

12
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x52
Dl 0x01
Data 0xF0 – Request short circuit status
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x52
Ac Answer code
Dl 0x01
Data 0x00 - No short circuit detected
0x01 - One of the channels has short circuit fault
Et 0x0D
Short circuit status (0x52) (SA20 only)
Request the output short circuit status.
Example
Command/response sequence for requesting the short circuit status, where
the result is no short circuit:
Command: 0x21 0x01 0x52 0x01 0xF0 0x0D
Response: 0x21 0x01 0x52 0x00 0x01 0x00 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x51
Dl 0x01
Data 0xF0 – Request DC offset status
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x51
Ac Answer code
Dl 0x01
Data 0x00 - OK
0x01 - DC offset detected
Et 0x0D
DC offset (0x51)
Request the output DC offset status.
Example
Command/response sequence for requesting the DC offset status where the
result is no DC offset:
Command: 0x21 0x01 0x51 0x01 0xF0 0x0D
Response: 0x21 0x01 0x51 0x00 0x01 0x00 0x0D

13
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x54
Dl 0x01 (Query) or 0x04 (Set)
Data1 0xF0 (Query) or 0x?? (Set first byte of the IP address)
Data2 0x?? (Set second byte of the IP address)
Data3 0x?? (Set third byte of the IP address)
Data4 0x?? (Set fouth byte of the IP address)
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x54
Ac Answer code
Dl 0x04
Data1 0x?? (First byte of the IP address)
Data2 0x?? (Second byte of the IP address)
Data3 0x?? (Third byte of the IP address)
Data4 0x?? (Fourth byte of the IP address)
Et 0x0D
IP address (0x54)
This command sets or requests the IP address of the unit. This command will
also set DHCP to OFF.
Example 1
Command/response sequence for setting an IP address of 192.168.1.4:
Command: 0x21 0x01 0x54 0x04 0xC0 0xA8 0x01 0x04 0x0D
Response: 0x21 0x01 0x54 0x00 0x04 0xC0 0xA8 0x01 0x04
0x0D
Example 2
Command/response for requesting the IP address of the unit, where the IP
address is 192.168.1.4:
Command: 0x21 0x01 0x54 0x01 0xF0 0x0D
Response: 0x21 0x01 0x54 0x00 0x04 0xC0 0xA8 0x01 0x04
0x0D
NOTE:
To set DHCP to ON, set the unit’s IP address to 0.0.0.0
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x53
Dl 0x01 (query) or <n> (limited to 10 characters) for setting name
Data 0xF0 – query
<n> Name in ASCII characters
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone Number
Cc 0x53
Ac Answer code
Dl Data length – <n> if setting (10 characters maximum)
0x0A if requesting the name
Data1 -
Data <n>
Name in ASCII characters
Et 0x0D
Friendly name (0x53)
This command returns the friendly name of the unit. It can also be used to
set the unit name.
Example
Command/response sequence for setting the unit name to “SA20”:
Command: 0x21 0x01 0x53 0x04 0x53 0x41 0x33 0x30 0x0D
Response: 0x21 0x01 0x53 0x00 0x04 0x53 0x41 0x32 0x30
0x0D
Note
Only upper case characters [A...Z], numbers [0...9] and space are allowed

14
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x55
Dl 0x01
Data 0xF0
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x55
Ac Answer code
Dl 0x02
Data1 0x00 (First byte of timeout counter, value is fixed)
Data2 0x00 – 0xF0 (Second byte timeout counter)
Et 0x0D
Timeout counter (0x55)
This command requests the time left (in minutes) until unit enters auto
standby.
Example
Command/response sequence for requesting the time left until timeout:
Command: 0x21 0x01 0x55 0x01 0xF0 0x0D
Response: 0x21 0x01 0x55 0x00 0x02 0x00 0xF0 0x0D
In this example, the timeout value is 0x00B4, which translates to 180 minutes
(i.e. 3 hours). The range of the value returned is from 0x0000 - 0x00F0 (0 - 240
minutes)
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x56
Dl 0x01
Data 0xF0 – Request lifter temperature
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x56
Ac Answer code
Dl 0x01
Data 0x?? – Temperature in deg C in hex, e.g. 75degC = 4B
Et 0x0D
Lifter temperature (0x56) (SA20 Only)
Request the temperature of the lifter.
Example
Command/response sequence for requesting the temperature of the lifter
where the result is 75degC:
Command: 0x21 0x01 0x56 0x01 0xF0 0x0D
Response: 0x21 0x01 0x56 0x00 0x01 0x4B 0x0D

15
Auto shutdown control (0x58)
Enable or disable the signal sense auto shutdown feature
Example 1
Command/response sequence, the signal sense auto shutdown timeout has
been set to 60 minutes:
Command: 0x21 0x01 0x58 0x01 0x02 0x0D
Response: 0x21 0x01 0x58 0x00 0x01 0x02 0x0D
Example 2
Command/response sequence, the signal sense auto shutdown has been
disabled:
Command: 0x21 0x01 0x58 0x01 0x00 0x0D
Response: 0x21 0x01 0x58 0x00 0x01 0x00 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x58
Dl 0x01
Data 0x00 – Disable (Default)
0x01 – 30 min
0x02 – 1 hour
0x03 – 2 hours
0x04 – 4 hours
0xF0 – Request timeout status
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x58
Ac Answer code
Dl 0x01
Data 0x01 – 30 min
0x02 – 1 hour
0x03 – 2 hours
0x04 – 4 hours
Et 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x57
Dl 0x01
Data 0xF0 – Request output temperature
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x57
Ac Answer code
Dl 0x01
Data 0x?? – Temperature in deg C in hex, e.g. 75degC = 4B
Et 0x0D
Output temperature (0x57)
Request the temperature of the output stage.
Example
Command/response sequence for requesting the temperature of the output
where the result is 75 degC:
Command: 0x21 0x01 0x57 0x01 0xF0 0x0D
Response: 0x21 0x01 0x57 0x00 0x01 0x4B 0x0D

16
Processor mode input (0x5B)
Enable processor mode on a certain input or disable processor mode.
Example
Enable processor mode on the CD input:
Command: 0x21 0x01 0x5B 0x01 0x06 0x0D
Response: 0x21 0x01 0x5B 0x00 0x01 0x06 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x5B
Dl 0x01
Data 0x00 - Disable (Default)
0x02 - Aux
0x03 - PVR
0x04 - AV
0x05 - STB
0x06 - CD
0x07 - BD
0x08 - SAT
0xF0 - Query processor mode status
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x5B
Ac Answer code
Dl 0x01
Data 0x00 - Disabled
0x01 - Phono
0x02 - Aux
0x03 - PVR
0x04 - AV
0x05 - STB
0x06 - CD
0x07 - BD
0x08 - SAT
Et 0x0D
Input detect (0x5A)
Request the status of the active input.
Example
Command/response sequence where audio input is present.
Command: 0x21 0x01 0x5A 0x01 0xF0 0x0D
Response: 0x21 0x01 0x5A 0x00 0x01 0x01 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x5A
Dl 0x01
Data 0xF0 - Request input status
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x5A
Ac Answer code
Dl 0x01
Data 0x00 - Input not present
0x01 - Input present
Et 0x0D

17
Processor mode volume (0x5C)
Set the processor mode volume
Example
Command/response sequence to set the processor mode volume to 45
(0x2D).
Command: 0x21 0x01 0x5C 0x01 0x2D 0x0D
Response: 0x21 0x01 0x5C 0x00 0x01 0x2D 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x5C
Dl 0x01
Data 0x00 (0) – 0x63 (99) – Set the volume
0xF0 – Request the current volume
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x5C
Ac Answer code
Dl 0x01
Data 0x00 (0)– 0x63 (99)
Et 0x0D
System status (0x5D)
Request the system status.
Example
Command/response sequence to request the system status.
Command: 0x21 0x01 0x5D 0x01 0xF0 0x0D
Response: 0x21 0x01 0x5D 0x00 0x01 0xF0 0x0D
Note:
This command will return the following information about the system:
• Power state
• Brightness level
• Headphone status
• Software version
• Model Number
• Volume setting
• Mute status
• Current input source
• Headphone override status
• Balance setting
• Sample rate
• Network name
• IP address
• Timeout counter value
• Lifter temperature (SA20 only)
• Output temperature
• Auto shutdown status
• Input detect status
• Processor mode input
• Processor mode volume
• DC offset status
• Short circuit status (SA20 only)
• DAC Filter
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x5D
Dl 0x01
Data 0xF0 – Request the system
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x5D
Ac Answer code
Dl 0x01
Data 0xF0 - System status sent
Et 0x0D

18
System model (0x5E)
Request the system model.
Example
Command/response sequence to request the system model, where the
model is SA10.
Command: 0x21 0x01 0x5E 0x01 0xF0 0x0D
Response: 0x21 0x01 0x5E 0x00 0x04 0x53 0x41 0x31 0x30 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x5E
Dl 0x01
Data 0xF0 – Request the system model
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x5E
Ac Answer code
Dl 0x04
Data System model in ASCII characters
Et 0x0D
DAC Filter (0x61)
Sets or requests the DAC filter
Example
Command/response sequence to request the DAC filter where response is
Linear Phase Fast Roll Off
Command: 0x21 0x01 0x61 0x01 0xF0 0x0D
Response: 0x21 0x01 0x61 0x00 0x01 0x00 0x0D
COMMAND:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x61
Dl 0x01
Data 0x00 - Linear Phase Fast Roll Off
0x01 - Linear Phase Slow Roll Off
0x02 - Minimum Phase Fast Roll Off
0x03 - Minimum Phase Slow Roll Off (SA20 only)
0x04 - Brick Wall (SA20 only)
0x05 - Corrected Phase Fast Roll Off (SA20 only)
0x06 - Apodizing (SA20 only)
0xF0 - Request the current filter
Et 0x0D
RESPONSE:
Byte: Description:
St 0x21
Zn Zone number
Cc 0x61
Ac Answer code
Dl 0x01
Data 0x00 - Linear Phase Fast Roll Off
0x01 - Linear Phase Slow Roll Off
0x02 - Minimum Phase Fast Roll Off
0x03 - Minimum Phase Slow Roll Off (SA20 only)
0x04 - Brick Wall (SA20 only)
0x05 - Corrected Phase Fast Roll Off (SA20 only)
0x06 - Apodizing (SA20 only)
Et 0x0D

19
Basic Functions
These RC5 codes are present on the supplied IR remote control and provide
control over basic amplifier functions.
Advanced Functions
These RC5 codes are not present on the supplied remote control but have
been created for custom install use. In order for the amp to respond to these
codes they must be transmitted from a programmable IR remote control or
over the control link using the ‘Simulate RC5 IR Command’ (0x08).
Function RC5 code
[system-command]
RC5 code
(Data1 - Data2)
Decimal Hexadecimal
Standby 16-12 0x10 - 0x0C
Disp 16-59 0x10 - 0x3B
Mute 16 -13 0x10 - 0x0D
Increase volume (+) 16-16 0x10 - 0x10
Decrease volume (-) 16 -17 0x10 - 0x11
Balance left 16-38 0x10 - 0x26
Balance right 16-40 0x10 - 0x28
PHONO 16 -117 0x10 - 0x75
CD 16 -118 0x10 - 0x76
BD 16-98 0x10 - 0x62
SAT 16-27 0x10 - 0x1B
PVR 16-96 0x10 - 0x60
AV 16-94 0x10 - 0x5E
AUX 16-99 0x10 - 0x63
STB 16-100 0x10 - 0x64
Function RC5 Code
[system-command]
RC5 Code
(Data1 - Data2)
Decimal Hexadecimal
Power On 16 -123 0x10 - 0x7B
Power Off 16 -124 0x10 - 0x7C
Mute On 16-26 0x10 - 0x1A
Mute Off 16 -120 0x10 - 0x78
Display Off 16-31 0x10 - 0x1F
Display L1 16-34 0x10 - 0x22
Display L2 16-35 0x10 - 0x23
Back (return) 16-51 0x10 - 0x33
Home 16-43 0x10 - 0x2B
Menu (Enter system menu) 16-82 0x10 - 0x52
Navigate Up 16-86 0x10 - 0x56
Navigate Left 16-81 0x10 - 0x51
OK 16-87 0x10 - 0x57
Navigate Right 16-80 0x10 - 0x50
Navigate Down 16-85 0x10 - 0x55
These codes are recognised as infra-red signals received by the front panel and as control data using the “Simulate RC5 IR command (0x08)” on page 7.
RC5 Command Codes

SH277E Issue B
THE WEST WING, STIRLING HOUSE
www.arcam.co.uk
[phone]
WATERBEACH, CAMBRIDGE, CB25 9PB, ENGLAND