pro bel 4407 User manual

echnical Manual
4407
Digital Audio Sample Rate Converter
Contents
Introduction 3
2 Installation 5
2.1 Signal I/O 6
3 Configuration 8
3.1 Setting reference termination options 8
3.2 Selecting the output sample rate 10
3.3 Setting local/remote gain modes 11
3.4 Setting audio modify options 12
4 RS485 serial control 3
4.1 Setting the multi-drop address 14
4.2 Electrical parameters 15
4.3 Four wire and two wire operation 15
4.4 he link layer protocol 16
Multi-drop headers
4.5 Message layer 16
Bytes transmitted
4.6 Protocol examples 19
5 Status monitoring 2
6 Trouble shooting 22
7 Specification 25
8 Ordering Information 27

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4407
Digital Audio Sample Rate Converter
echnical Manual
3
Introduction
The 4407 is a eight output AES3 digital audio synchroniser/converter. It is designed
to synchronise non-synchronous digital audio when locked to a AES11 reference. It
will also sample rate convert from any valid digital audio signal in the range 32kHz
to 54kHz to one of the available output sample clock rates; 32kHz, 44.1kHzand
48kHz.
The module features an on-board gain control, remote fader option and a
programmable automatic fade facility is provided.Audio modify features include
channel swap, either channel to both output channels and digital silence.
Remote control of gain and fader response is available through a dedicated RS484
serial port.
The module may be used in the 1050 3U and 10511U ICON modular product
rackframes with a choice of balanced or unbalanced rear connectors.
Characteristics of the 4407 are:
· eight outputs
· AES3 or SPDIF inputs
· sample rate synchronising for asynchronous 32kHz, 44.1kHz or 48kHz sources
when module locked to AES11.
· sample rate conversion from 32 to 54kHz
· AES11 reference input
· gain control 0dB to -12dB
· jumper selectable audio modify facilities (A-both,B-both, A/B swap and digital
silence)
· RS485 serial control (four wire and two wire) of gain and fader response
· automatic fade to or from silence in 0,1,2,4 or 8 seconds under serial control
· compatible with Pro-Bel COSMOS status monitoring.

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he 4407 digital audio sample rate converter
DC POWER
AND COSMOS
S A US DA A
POWER
REG
S A US
MON
DIGI AL AUDIO
REFERENCE
AES 3
INPU
8 AES
OU PU S
Receiver
and
Regenerator
Synchroniser/
Rate Converter
Reference
Processor
Reference errorReference error
Input error

4407
Digital Audio Sample Rate Converter
echnical Manual
5
2 Installation
The 4407 eight output digital audio sample rate converter and synchroniser fits in
the 1050 3U and 1051 1U ICON modular product rackframes. It is used with either
the K4407.2B 30mm rearpanel for balanced digital audio I/O or the K4407.3U 30mm
rear panel for unbalanced digital audio I/O.
he 4407 digital audio reframer with the 5288 sub-module
The 4407 is supplied with the 5528 sub-module fitted at the factory. In the unlikely
event that the sub-module needs to be removed and refitted proceed as follows:
· ease the sub-module out of its header sockets using gentle leverage under the top
and bottom connectors
· refit by gently pushing the connectors into the PCB headers
· observer the correct sub-module orientation as shown
Re-fitting the 5288 sub-module
For module and rear connector installation please refer to the appropriate ICON
rackframe section of the manual.
RSF2
POLL
POWER
AUDIO LOCK
AUDIO LOCK
AUDIO LOCK
159
100
97
92
89
86
83
80
76
73
70
67
64
59
56
53
162
167
170
173
176
179
186
189
192
195
198
203
206
123
41
1
14 17 20 23 28 31 34 37 40 47 50
1
5
4
1
5
1
1
4
5
1
4
2
1
3
9
1
3
6
1
3
3
1
2
8
1
2
5
1
1
9
1
2
2
1
1
6
1
1
3
1
0
7
SW1-1
SW1-2
SW1-3
SW1-4
SW2-1
SW2
RV1
SW1
SW2-2
SW2-3
SW2-4
0
0
1
1
4400_S1
FOR 5287 ONLY
2
10
PL2
INPUT A
U
N
B
A
L
7
5
R
B
R
I
D
G
E
B
A
L
1
1
0
R
P
L
3
RSF1
REF I/P
P
L
5
1
2
3
4
OFF ON
SW1
NORM
FADER
BOOT
D5
NO REF
5287
D6
+5V
SW2
PL12
SYSTEM
RESET
PL11
PL10
PL11
PL10
0 1
0 1
0 1
0 1
HI-Z110R
0 1
HI-Z110RHI-Z75R110R
RSF2
POLL
POWER
AUDIO LOCK
AUDIO LOCK
AUDIO LOCK
159
100
97
92
89
86
83
80
76
73
70
67
64
59
56
53
162
167
170
173
176
179
186
189
192
195
198
203
206
123
41
1
14 17 20 23 28 31 34 37 40 47 50
1
5
4
1
5
1
1
4
5
1
4
2
1
3
9
1
3
6
1
3
3
1
2
8
1
2
5
1
1
9
1
2
2
1
1
6
1
1
3
1
0
7
SW1-1
SW1-2
SW1-3
SW1-4
SW2-1
SW2
RV1
SW1
SW2-2
SW2-3
SW2-4
0
0
1
1
4400_S1
FOR 5287 ONLY 2
10
PL2
INPUT A
U
N
B
A
L
7
5
R
B
R
I
D
G
E
B
A
L
1
1
0
R
P
L
3
RSF1
REF I/P
P
L
5
1
2
3
4
OFF ON
SW1
NORM
FADER
BOOT
D5
NO REF
5287
D6
+5V
SW2
PL12
SYSTEM
RESET
PL11
PL10
PL11
PL10
0 1
0 1
0 1
0 1
HI-Z110R
0 1
HI-Z110RHI-Z75R110R

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Issue 2
2. Signal I/O
The K4407.3U panel is equipped with BNC connectors for unbalanced digital audio,
whilst the K4407.2B panel is equipped with a 25 way ‘D’ type connector for balanced
digital audio. Both panels have a 15 way ‘D’ connector for control and AES balanced
input.
Control Pin outs
Pin Function Pin Function
1RS485 TX+ 9RS485 TX-
2GND 10 RS485 RX+
3RS485 RX- 11 GND
4FADER +V 12 FADER WIPER
5GND 13 *
6 * 14 GND
7N/C 15 N/C
8GND
* INTERNAL CONNECTION – DO NOT USE
External fader
Fader +V
Wiper
Fader 0V
(GND)
10K
Ohms
AESOUT
CONTROL
A
E
S
O
U
T
P
U
T
S
AESREFIN
AESIN
1
15
TheK4407.3Urear panel
forunbalanced I/O

4407
Digital Audio Sample Rate Converter
echnical Manual
7
The K4407.2B rear panel
for balanced I/O
S
I
G
N
A
L
I
/
O
C
O
N
T
R
O
L
K4407
.2B
Signal I/O (K4407.3B)
Pin Function Pin Function
1O/P1- 14 O/P5-
2O/P1+ 15 O/P5+
3GND 16 GND
4O/P2- 17 O/P6-
5O/P2+ 18 O/P6+
6AES REF IN-
19 N/C
7AES REF IN+ 20 N/C
8GND 21 O/P7-
9O/P3- 22 O/P+
10 O/P3+ 23 GND
11 GND 24 O/P8-
12 O/P4- 25 O/P8+
13 O/P4+
Control Pin outs
Pin Function Pin Function
1RS485 TX+ 9RS485 TX-
2GND 10 RS485 RX+
3RS485 RX- 11 GND
4FADER +V 12 FADER WIPER
5GND 13 AES I/P+
6AES I/P 14 GND
7N/C 15 N/C
8GND

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Issue 2
3 Configuration
The 4407 may be configured for different input and RS485 comms termination
values and audio modifyoptions. When placed under RS485 remote control, a
unique multi-drop address may be selected.
3. Selecting reference termination
options
The jumpers to select AES input termination are located on the main 4407 module.
The available options are explained in the following table:
AES input termination modes
PL3 settings (4407) Description
UNBAL Use for unbalanced signal – requires K4407-3U rear
panel
75R Use with unbalanced input to terminate signal with
75W
BRIDGE Selects high impedance termination (Hi-Z)
BAL Use with balanced input – requires K4407-2B rear
panel
110R Use with balanced inputs to terminate signal with
110W
Input termination
jumpers
INPUT A
UNBAL
75R
BRIDGE
BAL
110R
P
L
3
REFI/P
PL 5
4407 termination
jumpers

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Digital Audio Sample Rate Converter
echnical Manual
9
The jumper (PL9) to select the AES reference termination values is located on the
5288 sample rate converter sub-module itself. The available selections are as follows:
AES reference termination values
PL9 settings (5288) Description
75R Use with unbalanced input to terminate signal with
75W
HI-Z Selects high impedance termination (Bridging
mode)
110R Use with balanced inputs to terminate signal with
110W
5288 termination jumpers
The termination impedance for the RS485 communications ports are set by PL5
(transmitter) and PL6 (receiver) as described in the following table:
RS485 transmit and receive termination values
PL5&6 settings (5288) Description
HI-Z Selects high impedance termination (Bridging
mode)
110R Use to terminate signal with 110W
Note: Do not leave the AES reference or RS485 inputs in high impedance with no
signal connected to avoid spurious input.
HI-Z110RHI-Z110RHI-Z75R110R
P9L PL5
P
L6
AES reference
termination
jumper
R485
termination
jumpers
S

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Issue 2
3.2 Selecting the output sample rate
The output sample rate is selected with SW2-1 and SW2-2 as described in the
following table:
4407 sample rate options
SW2-2 SW2-1 Sample rate
0044.1KHz
0132KHz
1048KHz
1148KHz
SW1-1
SW1-2
SW1-3
SW1-4
SW2-1
SW2
SW1
SW2-2
SW2-3
SW2-4
0
0
1
1
VIDEOLOCK
LOWREF
Samplerate select switches

4407
Digital Audio Sample Rate Converter
echnical Manual
3.3 Setting local/remote gain modes
The local or RS485 remote gain control is selected by 5288 jumper PL1. Setting PL1 to
’0’ enables PL3 to select either an external fader or the on-board potentiometer, RV1
to control AES gain.
Local/remote gain and fader control
PL1 PL3 Mode
0FADER Control via external fader
0POT Control via on-board potentiometer, RV1
1XControl via RS485 comms
Notes:
· An external fader ( ³10kW ), may be connected to the control port as described in
the installation section.
· Setting PL1 to ‘1’ assigns gain/fader control to the RS485 communication
protocol.
· X = don’t care
· PL4 must be left in the NORM position and PL2 is reserved for future use.
1
2
3
4
OFF ON
SW1
NORM
FADER
BOOT
PL12
PL11
PL10
P2L
P1L
0 1
0 1
0 1
0
1
0
1
PL4
RS485remote
control jumper
Extfader/local gain
control jumper

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Issue 2
3.4 Setting audio modify options
The audio modify features of the module are set with 5288 jumpers PL10, 11 and 12
as described in the following table:
Audio modify options
Function PL10 PL11 PL12
Stereo (normal mode – no modify) 111
Input A - both 011
Input B - both 101
A/B swap 001
Digital silence 110
Reserved for future use 010
Reserved for future use 100
Reserved for future use 000
1
2
3
4
OFF
ON
SW1
NORM
FADER
BOOT
PL12
PL11
PL10
P2L
P1L
0
1
0
1
0
1
0
1
0
1
P
L4
Audiomodifyjumpers

4407
Digital Audio Sample Rate Converter
echnical Manual
3
4 RS485 serial control
The RS485 comms control enables up to sixteen 4407 sample rate
converter/synchroniser cards to be remotely controlled and monitored.
The RS485 controlling unit may set gain, automatic fades of various rates, reset and
monitor the status of each card individually. Gain is automatically restored to 0dB
after a power-on reset.
Assign a 4407 module to RS485control by placing PL1 on the 5288 sub-module to
the ‘1’ position:
1
2
3
4
OFF ON
SW1
NORM
FADER
BOOT
SW2
PL12
SYSTEM
RESET
PL11
PL10
PL11
PL10
0 1
0 1
0 1
0
1
0
1
SW1RS485multi-
drop address
switch
RS485remote
control jumper
SW2RS485
commsreset

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Issue 2
4. Setting the multi-drop address
Each module may be assigned a unique multi-drop address using SW1 on the 5288
sub-module, to operate over the RS485 communication protocol as described in the
following table
Multi-drop address, SW
Hex address 1 2 3 4
F(15) 0111
E (14) 1111
D (13) 0011
C (12) 1011
B (11) 0101
A (10) 1101
90001
80001
71110
60110
51010
40010
31100
20100
11000
00000
The reset switch, SW2, sets the RS485 comms to the initial state, fader at top, gain =
0dB and resets the AES Digital Signal Processor. The reset button must be pressed
after changing the address switch, SW1 to update the multi-drop address memory.

4407
Digital Audio Sample Rate Converter
echnical Manual
5
4.2 Electrical parameters
Normal electrical parameters are:
· RS485
· 8 bit data
· one stop
· even parity
· 38.4kbaud
Normal transmitters used must be capable of running in parallel i.e. more than one
transmitter enabled, RS485 compatible. The group poll uses this feature.
4.3 Four wire and two wire operation
The 4407 is a full duplex four wire device. However due to the workings of the multi-
drop communication protocol where the controller initiates data flows, the 4407 can
be used as a two wire device with the following wiring modifications:
19
10
3
X+ X-
X+
4407 CON ROL CONNECOR
FOUR WIRE FULL DUPLEX
RX- RX+
X-
WO WIRE MUL I-
DROP SYS EM

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Issue 2
4.4 The link layer protocol
The general protocol format is:
MD header Device address Message
· all multi-drop (MD) headers have the top bit set
· the device address is a single byte in the range 0 to 16
· all undefined commands have no effect
Multi-drop headers
The following MD headers may be transmitted to the 4407 by a controller
3 - Send device data
This is followed by a device address and any command message for the 4407.
4 - Device data request
This is followed by a device address. The device must respond with a single byte of
data. The null response may be sent if no data is ready.
5 - Group poll
This causes any device with data to transmit a single null character. If more than one
device replies the controller may receive an overrun, framing or parity error. The
controller interprets any character received or anyof the above error conditions as a
request to send data by one of the devices.
The multi-drop link layer only packages outgoing messages as all incomingdata is of
one byte length.
4.5 Message layer
After the controller has issued a send device data byte (F3) followed by a device
address (hex 0l-l0), the next byte sent will be a command to that device.
The controller can send the following commands to the 4407:
set output level gain - byte 1 : 0001HHHH
- byte 2 : 0000LLLL
This command sets the audio input, output gain, HHHH are the high gain bits, while
LLLL are the lower gain bits. Step size is 0.09375 dB per bit.
HHHHLLLL = 00= -12db minimum gain setting
HHHHLLLL = 80= 0db unity gain (if greater than 80 gain is set to 0db)

4407
Digital Audio Sample Rate Converter
echnical Manual
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set fade - byte 1 : 00l0000D
- byte 2 : 0SSSSSSS
To start an audio fade this command is sent with the parameters D for up (1) or down
(0) and SSSSSSS for fade rate.
SSSSSSS 00 =fade in 0 seconds
05 =fade in 1 second Notes: These are
0A =fade in 2 seconds approximate times
14 =fade in 4 seconds
28 =fade in 8 seconds
Other values have no effect.
status request - byte 1 : 00110000
On receiving this command the 4407 will respond by sending 6 bytes of status data
as detailed in the following section.
reset - byte 1 : hex FD
Causes the 4407 card to reset to the power up condition which is fader at the top and
unity gain.
Bytes transmitted
The following data bytes are transmitted by the 4407 after a panel poll from the link
layer has been issued by the controller.
fader gain high - 0001HHHH
fader gain low - 00l0LLLL
Reports the fader gain status. This is not the audio gain setting but a value
corresponding to the fade position at that particular point. These bytes are issued in
response to a status request command given from the controller.
HHHHLLLL 00 = fade has reached bottom position
80 = fade active
FF = fade has reached top position
Note: These bytes are included for compatibility with the CBC 5015 fader protocol.

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transition status - 00 11ABCD
These are status bits indicating the current fade action. All bits are active when they
are high.
· A = fading down
· B = fading up
· C = fade at bottom
· D = fade at top
No two bits should be onat any time. This byte is issued in response to a status
request command and when the fade transition status changes.
AES data status - 01000N00
The AES bit stream input signal has various status bits which are active when high.
Data error (no input)
Typically, with no audio signal, BIT N will be set high. This byte is issued in response
to a status request command and when the AES input status changes.

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Digital Audio Sample Rate Converter
echnical Manual
9
4.6 Protocol examples
Status request
Controller Description Device response
F5 Group poll
F3 0A 30 Status request card 10
F5 Group poll 00
F4 0A Request data from card 10 1F
F4 0A 2F
F4 0A 31
F4 0A 44
F4 0A 58
F4 0A 60
F5 Group poll
Device response 1F, 2F says that the fader gain is fully up. Byte 31 indicates that the
fader is at the top position and byte 44 says that no valid AES bit stream data is
present at the card inputs. Byte 58 and 60 form together to report the output level
gain of 0db (unity gain).
Note: This is the status of the 4407 card after a reset command, on power-up and
when the comms reset button is pushed.
Set output level gain
Controller Description Device response
F5 Group poll
F3 07 18 00 Set unity gain on card 7
F3 0B 10 00 Set - 12dB gain on card 11
F5 Group poll
No response is issued from the 4407 card when the gain is changed.

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Issue 2
Set fade
Controller Description Device response
F4 09 Request data from panel 9 FF
F3 09 20 00 Fast fade down for panel 9
F4 09 Request data from panel 932
F3 09 21 05 Fade up in one second
F4 09 Request data from panel 934
F4 09 Request data from panel 931
Device response 32 indicates fade at bottom. Byte 34 says that the fader is currently
fading up but has not reached the top yet and finally, byte 31 tells the controller that
the fade is finished and at the top