Cambridge Audio Azur 752CXU User manual

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752BD/CXU Blu-ray Disc Player
RS-232 Control Protocol
The 752BD/CXU Blu-ray Disc Player can be ordered with an RS-232 option for wired
remote control. The RS-232C port is configured as a DCE device using a female 9-pin
D-Sub type connector.
RS-232 Pin Configuration:
The pin out of the 752BD/CXU RS-232C port is as the following:
Pin
2 3 5
Signal
TXD RXD GND
This pin configuration allows a PC running a serial terminal program (such as Hyper
Terminal) to communicate with the player using a straight-through DB9 9-pin RS-232
serial cable. Do NOT use a “Null-Modem” type cable for PC connection. For connection
to a remote control system, please refer to the documentation that comes with the
remote control system.
Communication Settings:
Baud Rate Data Bits Parity Stop Bit Flow Control
9600 8 None 1 None
Command Structure:
Each command starts with a # sign (ASCII 0x23), followed by a 3-character command
code. If there are any parameters for the command, the parameters are given in text
format, separated by a space (ASCII 0x20) from the command code. The # character
(ASCII 0x23) must never appear in the parameters. A carriage return (ASCII 0x0d)
indicates the end of the command. Each command must not exceed 25 bytes including
the start of command and end of command bytes.
The illustration of the command structure is as the followings:
<Command> = <Start of Command><Command Code>[<sp><Parameters>]
<End of Command>
<Start of Command> = #, ASCII 0x23
<Command Code> = <byte><byte><byte>
<sp> = space, ASCII 0x20
<Parameters> = command-specific
<End of Command> = CR, ASCII 0x0d
Response Structure:
Upon receiving a command, the player shall try to execute the command and send back
a response. Two response formats are supported: the short response and the verbose

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response. The short response is used by default. If the verbose mode (See command
reference for SVM) is set, the verbose response will be used instead.
The response starts with an “@” sign (ASCII 0x23), followed by the original command
code and a space (ASCII 0x20) if the verbose response is in use, and a result code,
either “OK” or “ER”. If there are any parameters or additional message, the parameters
or message is given in text format, separated by a space (ASCII 0x20) from the result
code. The @ character (ASCII 0x40) must never appear in the parameters or message.
A carriage return (ASCII 0x0d) indicates the end of response. Each response must not
exceed 25 bytes including the start of response and the end of response bytes.
The illustration of the response structure is as the followings:
<Short Response> = <Start of Response><Result Code>[<sp><Parameters>]
<End of Response>
<Verbose Response> = <Start of Response><Command Code><sp><Result Code>
[<sp><Parameters>]<End of Response>
<Start of Response> = @, ASCII 0x40
<Command Code> = <byte><byte><byte>
<Result Code> = OK|ER
<sp> = space, ASCII 0x20
<Parameters> = command-specific
<End of Response> = CR, ASCII 0x0d
Status Update Messages Structure:
If the verbose mode is set to 2 or 3, the player will send status update messages
automatically. These messages are not a response to any particular command. Any
status change caused by commands from RS232, front panel buttons, IR remote control,
or playback progress may trigger status update messages.
The status update messages have the following structure:
<Update> = <Start of Update><Status Code>[<sp><Parameters>]<End of Update>
<Start of Update> = @, ASCII 0x40
<Status Code> = <byte><byte><byte>
<sp> = space, ASCII 0x20
<Parameters> = status-specific
<End of Response> = CR, ASCII 0x0d
Command Sequence:
Commands are executed in the order they are received. The host should wait for a
response from the player before sending the next command.
If the player receives a new command before executing the previous command, the
player may discard the previous command.
If the host does not receive a response from the player 10 seconds after the command is
issued, the host may consider the command or response lost during transmission, and
can retransmit the command.

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Command List:
A. Command that maps to a remote control button
This group of commands maps directly to the infrared remote control keys. No
parameters are needed for these commands. The player handles the commands as if it
receives the same IR remote commands. For actions that require a multiple-key
sequence, such as go to a certain chapter (GOT command followed by multiple numeric
key commands and the SEL command), the player responds to each command
individually until the last command is received. At that time the player shall respond with
either OK or ER depending on the result of the action.
Command
Code
Remote Key
Function
Response
Example
POW POWER Toggle power STANDBY
and ON
OK ON
OK OFF
SRC INPUT Select input source OK
EJT OPEN Open/close the disc tray OK OPEN
OK CLOSE
PON ON Discrete on OK ON
POF OFF Discrete off OK OFF
SYS P/N Switch output TV system:
NSTC, PAL or
MULTI(AUTO)
OK NTSC
OK PAL
OK AUTO
DIM DIMMER Dim front panel display OK ON
OK DIM
OK OFF
PUR PURE AUDIO Pure audio mode (no video) OK ON
OK OFF
VUP VOL + Increase volume OK n (n is the volume
number, 0 – 100)
VDN VOL - Decrease volume OK n (n is the volume
number, 0 – 100)
MUT MUTE Mute audio OK MUTE
OK UNMUTE
NU1 1 Numeric key 1 OK
NU2 2 Numeric key 2 OK
NU3 3 Numeric key 3 OK
NU4 4 Numeric key 4 OK
NU5 5 Numeric key 5 OK
NU6 6 Numeric key 6 OK
NU7 7 Numeric key 7 OK
NU8 8 Numeric key 8 OK
NU9 9 Numeric key 9 OK
NU0 0 Numeric key 0 OK
CLR CLEAR Clear numeric input OK
GOT GOTO Play from a specified
location
OK
HOM HOME Go to Home Menu to select OK

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media source
PUP PAGE UP Show previous page OK
PDN PAGE DOWN Show next page OK
OSD DISPLAY Show/hide on-screen display OK
TTL TOP MENU Show BD top menu or DVD
title menu
OK
MNU POP-UP MENU Show BD pop-up menu or
DVD menu
OK
NUP Up Arrow Navigation OK
NLT Left Arrow Navigation OK
NRT Right Arrow Navigation OK
NDN Down Arrow Navigation OK
SEL ENTER Navigation OK
SET SETUP Enter the player setup menu OK
RET RETURN Return to the previous menu
or mode
OK
RED RED Function varies by content OK
GRN GREEN Function varies by content OK
BLU BLUE Function varies by content OK
YLW YELLOW Function varies by content OK
STP STOP Stop playback OK
PLA PLAY Start playback OK
PAU PAUSE Pause playback OK
PRE PREV Skip to previous OK
REV REV Fast reverse play OK 1X
FWD FWD Fast forward play OK 1X
NXT NEXT Skip to next OK
AUD AUDIO Change audio language or
channel
OK
SUB SUBTITLE Change subtitle language OK
ANG ANGLE Change camera angle OK a/b (a: current angle
number, b: total
available angles)
ZOM ZOOM Zoom in/out and adjust
aspect ratio
OK (zoom ratio text)
SAP SAP Turn on/off Secondary Audio
Program
OK (audio track
information)
OK Off
ATB AB REPLAY Repeat play the selected
section
OK A-
OK A-B
OK OFF
RPT REPEAT Repeat play OK Repeat Chapter
OK Repeat Title
OK OFF
PIP PIP Show/hide Picture-in-Picture OK (PIP program info)
OK Off
HDM RESOLUTION Switch output resolution OK
SUH SUBTITLE
(hold)
Press and hold the
SUBTITLE key. This
OK

5
activates the subtitle shift
feature
OPT OPTION Show/hide the Option menu OK
NOP No operation. OK
B. Query Commands
This group of commands issues queries to the player. The player shall respond
according to its current status.
Command
Code
Function
Response
Example
QVM Query verbose mode OK 0
OK 1
OK 2
OK 3
QPW Query power status OK ON
OK OFF
QVR Query firmware version OK BDP103-xx-xxxx
QVL Query volume OK 100
OK MUTE
QHD Query HDMI resolution OK 480P
OK 720P50
OK 1080P60
OK AUTO
OK 4K*2K
QPL Query playback status OK NO DISC
OK LOADING
OK OPEN
OK CLOSE
OK PLAY
OK PAUSE
OK STOP
OK STEP
OK FREV
OK FFWD
OK SFWD
OK SREV
OK SETUP
OK HOME MENU
OK MEDIA CENTER
QTK Query Track/Title OK 02/10
QCH Query Chapter OK 03/03
QTE Query Track/Title elapsed time OK 00:01:34
QTR Query Track/Title remaining time OK 01:20:23
QCE Query Chapter elapsed time OK 00:01:34
QCR Query Chapter remaining time OK 00:12:22
QEL Query Total elapsed time OK 00:05:12

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QRE Query Total remaining time OK 01:34:44
QDT Query disc type OK BD-MV
OK DVD-VIDEO
OK DVD-AUDIO
OK SACD
OK CDDA
OK HDCD
OK DATA-DISC
QAT Query audio type OK DD 1/1
OK DD 1/5 English
OK DTS 2/5 English
OK LPCM
OK DTS-HD 1/4 English
QST Query subtitle type OK OFF
OK 1/1 English
QSH Query subtitle shift OK -5
(valid returns are -5 .. 0 .. 5)
QOP Query OSD position OK 0
(valid returns are 0 .. 5)
QRP Query Repeat Mode OK 00 Off
(OK followed by a repeat
mode code and text:
00 Off
01 Repeat One
02 Repeat Chapter
03 Repeat All
04 Repeat Title
05 Shuffle
06 Random)
QZM Query Zoom Mode OK 00
(OK followed by a zoom
mode code:
00 Off
01 Stretch
02 Full
03 Underscan
04 1.2x
05 1.3x
06 1.5x
07 2x
08 3x
09 4x
10 1/2
11 1/3
12 1/4)
QIS Query Input Source (Return the current
selected input source)
OK 0 BD-PLAYER
OK 1 HDMI-FRONT
OK 2 HDMI-BACK
OK 3 ARC-HDMI-OUT1
OK 4 ARC-HDMI-OUT2

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OK 5 OPTICAL
OK 6 COAXIAL
C. Advanced Commands
This group of commands instructs the player to perform an advanced operation in a
single step.
Command
Code
Parameters
Function
Response
Example
SVM 0
1
2
3
0 – Set Verbose Mode to off
1 – Commands are echoed back in
the response
2 – Enable unsolicited status
update. Only major status changes
are reported.
3 – Enable detailed status update.
When content is playing, the player
sends out playback time update
every second.
OK 0
OK 1
OK 2
OK 3
SHD SDI
SDP
720P
1080I
1080P
SRC
AUTO
4K2K
Set HDMI output resolution.
SDI – Standard definition interlaced
(480i/576i)
SDP – Standard definition
progressive (480p/576p)
SRC – Source Direct
4K2K – Ultra high definition
4Kx2K
OK 480P
(OK followed by the
original parameter)
SPN NTSC
PAL
AUTO
Set output TV system OK NTSC
OK PAL
OK AUTO
SZM 1
AR
FS
US
1.2
1.3
1.5
2
1/2
3
4
1/3
1/4
Set zoom ratio.
AR – Aspect ratio correction
(Stretch, Letterbox or Pillarbox)
FS - Full Screen
US - Underscan
For HDMI Output: 1, AR, FS, US,
1.2, 1.3, 1.5, 2, 1/2;
For Component Ouput: 1, 2, 3, 4,
1/2, 1/3, 1/4)
OK 1.2
(OK followed by the
zoom ratio)
ER INVALID
SVL 0 – 100
MUTE
Set volume control OK 100
OK MUTE
SRP CH
TT
ALL
Repeat chapter
Repeat title or CD track
Repeat all
OK CH
(OK followed by the
repeat mode)

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OFF
SHF
RND
Repeat off
Shuffle
Random
ER INVALID
SRH T3
C10
C 0:00:34
T 0:12:13
0:12:13
Search to Title 3
Search to Chapter 10
Search to 0:00:34 of the current
chapter or track
Search to 0:12:13 of the current title
or disc
Search to 0:12:13 of the current title
or disc
OK
ER INVALID
DPL Direct play OK
RST Reset RS232 Command – Clean all
command buffers, do not wait for
any pending/executing commands.
Start over again.
OK
SSH -5 ... 5 Set subtitle shift OK -5 (OK followed
by the shift level)
ER INVALID
SOP 0 … 5 Set OSD position OK 5 (OK followed
by the position
value)
ER INVALID
STC E
R
T
X
C
K
Set the time information display:
E – Total Elapsed time
R – Total Remaining time
T – Title Elapsed time
X – Title Remaining time
C – Chapter/track Elapsed time
K – Chapter/track Remaining time
OK E
(OK followed by the
display type)
ER INVALID
SIS 0
1
2
3
4
5
6
Select the input source:
0 – Blu-Ray Player
1 – HDMI/MHL IN-FRONT
2 – HDMI IN-BACK
3 – ARC on HDMI OUT1
4 – ARC on HDMI OUT2
5 – OPTICAL IN
6 – COAXIAL IN
OK 0 BD-PLAYER
OK 1 HDMI-FRONT
OK 2 HDMI-BACK
OK 3 ARC-HDMI-
OUT1
OK 4 ARC-HDMI-
OUT2
OK 5 OPTICAL
OK 6 COAXIAL
ER INVALID
Status Update Messages:
The following status update messages are sent by the player automatically when the
verbose mode is set to 2 or 3.
Verbose Mode 2:
UPW - Power Status Update:
Sent when there is a change of power on/off status.

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Possible parameters: 1 digit
1 – Player is turned on
0 – Player is going off
Example: @UPW 1
UPL - Playback Status Update:
Sent when there is a change of playback status.
Possible Parameters: 4 chars
DISC – No disc
LOAD – Loading disc
OPEN – Tray is open
CLOS – Tray is closing
PLAY – Playback is starting
PAUS – Playback is paused
STOP – Playback is stopped
STPF – Forward frame-by-frame step mode
STPR – Reverse frame-by-frame step mode
FFWn – Fast forward mode. Where n is a number of 1... 5 to indicate the
speed level
FRVn – Fast reverse mode. Where n is a number of 1… 5 to indicate the
speed level
SFWn – Slow forward mode. Where n is a number of 1…4 to indicate the
speed level (1 = ½, 2 = ¼, 3 = 1/8, 4 = 1/16)
SRVn – Slow reverse mode. Where n is a number of 1…4 to indicate the
speed level (1 = ½, 2 = ¼, 3 = 1/8, 4 = 1/16)
HOME – in home menu
MCTR – in media center
Example: @UPL PLAY
UVL - Volume Level Update:
Sent when there is a change in volume level or mute status.
Possible Parameters: 3 chars
MUT – Mute is engaged
000 .. 100 – Current volume level. Also sent when mute is cancelled.
Example: @UVL 095
UDT - Disc Type Update:
Sent when a new disc type is detected.
Possible Parameters: 4 chars
BDMV - Blu-ray Disc
DVDV – DVD-Video
DVDA – DVD-Audio
SACD
CDDA
HDCD
DATA – Data disc
VCD2 – VCD 2.0
SVCD - SVCD
Example: @UDT DVDV
UAT - Audio Type Update:

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Sent when a new audio track is encountered.
Parameters: Type (2 chars), space, number (01/99, 5 chars), space, language (3
chars), space, channels (2 chars)
Type code:
DD – Dolby Digital
DP – Dolby Digital Plus
DT – Dolby TrueHD
TS – DTS
TH – DTS-HD High Resolution
TM – DTS-HD Master Audio
PC – LPCM
MP – MPEG Audio
CD – CD Audio
UN – Unknown
Number: current audio track / available audio tracks in 2-digit number format.
For example, 01/99 means the first of 99 available tracks; 02/05 means the
second of 5 available tracks. If only one track is available, it is 01/01.
Language: Three-character language code: ENG for English, FRA for French,
and so on (ISO3166). UNK for unknown.
Channels: 1.0 for mono, 2.0 for stereo, 5.1 or 7.1 for 5.1-channel or 7.1-ch
surround, 0.0 for unknown.
Example: @UAT DD 01/05 ENG 5.1
UST - Subtitle Type Update:
Sent when a new subtitle is selected.
Parameters: number (01/99, 5 chars), space, language (3 chars)
Number: current subtitle track / available subtitle tracks in 2-digit number format.
For example, 01/99 means the first of 99 available tracks; 02/05 means the
second of 5 available tracks. If subtitle is set to off, use 00/xx where xx is the
number of available subtitle tracks. If no subtitle is available, use 00/00.
Language: Three-character language code: ENG for English, FRA for French,
and so on (ISO3166). UNK for unknown.
Example: @UST 02/05 ENG
UIS – Input Source Update:
Sent when there is a change in the input source selection.
Possible Parameters: source number (1 digit), space, source name (13 chars)
Source number and the corresponding source name:
0 - BD-PLAYER
1 - HDMI-FRONT
2 - HDMI-BACK
3 - ARC-HDMI-OUT1
4 - ARC-HDMI-OUT2
5 - OPTICAL
6 - COAXIAL
Example: @UIS 0 BD-PLAYER
@UIS 2 HDMI-BACK
Verbose Mode 3:
UTC - Time Code Update: