Broadcast Devices, Inc.
ATB-300 Audio Tool Box
*Digital/Analog Audio Switcher DA
Operations Quick Start Guide
Broadcast Devices, I nc.
Tel. (914) 737-5032
Fax. (914) 736-6916
World Wide Web: www.Bro ad ca st -Devices.com
Rev G. 03/18
*Option Dependent
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Table of Contents
I. Basic Description 3
II. ATB-300 Operational Mode Descriptions 3 – 7
A. Memory Programming 4
B. Silence Interval Programming 4
C. Silence Threshold Programming 5
III. Remote Control Operation 7-8
IV. Input Mode Selection Menu System 8 - 9
V. Audio I/O Connector Diagrams 10 - 11
VI. Remote Control Connector Diagrams 12
VII. Audio Status Output GPO Connection Diagram 13
VIII. Frame Rate Conversion Information 14
IX. Ethernet Setup 15-17
X. Warranty 18
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I. Basic Description
Basic Description by model number:
ATB-300-1 4 – AES I/O Digital only switcher/router
ATB-300-2 4 – AES I/O and 4 -analog L/R input switcher/router
ATB-300-3 4 - AES I/O and 4 - analog L/R output switcher/router
ATB-300-4 4 – Analog only I/O
ATB-300-5 4 - AES I/O, 4 – analog L/R balanced I/O
ATB-300-6 8 – AES I/O
ATB-300-7 8 – Analog Input 4 Analog Output
ATB-300-8 8 – Analog I/O
ATB-300-9 4 AES I/O 4 Composite baseband I/O
ATB-300-10 4 Analog L/R, 4 – Composite baseba nd I /O
ATB-300 is a 4 or 8 channel stereo analog / digital audio switcher/distribution system
featuring silence detection and automatic switching. Input and output types are defined
by the model number as shown above. The ATB-300 can be used to manually switch
inputs or will automatically switch when a programmable silence interval of between 10
and 600 seconds is detected. Auto switching is programmed using a “priority list” of 4 or
8 memories depending on configuration which are programmed with input channels to
search for audio in order of programmed preferenc e. The ATB-300's intelligent search
algorithm constantly monitors all inputs to allow immediate switching to the first active
channel in the priority list without need to sequence through inactive channels when
silence is detected.
AES I/O module Description
The AES I/O m odule allows for up to four AES inputs and outputs per module. All I/O
through this module follow the AES3 standard for interface. All I/O are 110 ohm
transformer coupled. The AES I/O module allows the user to select AES output clocks
including 32, 44.1 and 48 KHz sampling by DIP switch selection. Factory default is 44.1
KHz.
Analog Input Module Description
ATB-300 models with analog input are balanced bridging inputs capable of accepting
nominal +4 dBm input.
Analog Output Module Description
ATB-300 modules with analog output provide balanced stereo output capable of driving
4
600 ohm loads. Nominal level is +4 dBm output as the analog output is intended for
INPUT: CH 1 NO AUDIO
MANUAL CH1 SELECTED
monitor applications. Maximum output level of the analog output module is +18 dBm.
Composite I/O module Description
When equipped with the composite I/O module the ATB-300 can be used to switch
between AES and composite FM stereo inputs. All composite inputs are available as
AES3 outputs and are also rout ed to a four output composite baseband DA. The ATB300 incorporates a high quality DSP based stereo decoder to provide AES3 output
replicas of the composite inputs. The output of the DA is selected by selecting one of
the four available composite inputs 5-8. If an AES input is selected the composite output
will remain on the last selected composite input. Composite input is designed to accept
3.5 V peak to peak composite base band audio consistent with 100% modulation
corresponding to +/- 75 KHz FM deviation. Four identical isolated composite outputs are
available at 3.5 V peak to peak level suitable for driving most composite input FM
exciters.
II. ATB-300 Operational Mode De s cripti ons
ATB-300 Manual Mode
The ATB-300 defaults to MANUAL mode upo n power up. The LCD display will indicate
the manual mode as well as the currently selected input channel and the active /
inactive status of that input on the top line. The lower line indicates the channel that will
be switched to the outputs when the green ENTER (check mark) key is pressed. The
UP and DOWN arrows are used to select the input channel. The activity status of that
channel is also shown to avoid switching to an inactive channel. When the select key is
pressed the new selection is stored to memory and the audio is switched. This setting is
NON VOLATILE. If the ATB-300 is power cycled this channel will be selected on power
up.
Figure 1 - ATB-300 Manual Mode Display
In manual mode the user may also program the priority memories, the silence interval
and the relative audio threshold which triggers the active / inactive determination.
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A. Memory Programming
INPUT: CH 1 NO AUDIO
PRI 1 CH 1 NO AU DI O
AUDI O LOSS TI MEOUT
SECONDS = 60
Figure 2 - ATB-300 Priority Memory Programming Mode Display
Pressing the F2/F5 key will enter the memory programming mode. In this mode, the top
line of the LCD indicates the current memory (PRI 1 to PRI 8) being programmed, its
contents and the activity status of that channel. The lower line indicates the channel that
will be programmed into the memory when the ENTER key is pressed along with its
activity status.
The LEFT and RIGHT ARROW keys are used to select a memory to program. The
UP and DOWN keys sequence through the input channel selections. Pressing the
ENTER key will program the channel indicated on the bottom line in to the priority
memory. Note that programming the same channel into more than one memory is
possible and can be done to avoid having an unconnected input in the priority memory
list. The factory default memory channels are programmed to sequence through the 8
possible inputs in numerical order.
B. Silence Interval Programming
Pressing the F3/F6 Key will allow programming the silence interval. Select the desired
interval using the UP and DOWN arrow keys. The interval can be set to any time
between 10 and 600 seconds (Default = 60 seconds) using the UP and DOWN arrow
keys. Pushing the ENTER key will put this setting into non-volatile memory. Pushing the
red X key will return to the original value before it was changed. NOTE: the ENTER key
MUST be pushed to retain this setting after power is cycled. This allows the user to test
a setting before committing it to memory.
Figure 3 - ATB-300 Silence Interval Program Mode Display
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C. Silence Threshold Prog r amming
SILENCE LEVEL -55 dBFS
OUTPUT LEVEL = -20 dBFS
AUTO CH1 AUDIO OK
PRI 1 CH 3 NO AU DI O
Figure 4 - ATB-300 Silence Threshold Programming Mode Display
Pressing the F3/F6 Key again will allow programming of the silence threshold level. The
upper line of the LCD indicates the level of the input currently selected channel. The
lower line indicates the current threshold below which a channel will be considered
INACTIVE. This level can be set to any level between -30 to -55dbFS (default= -
55dbFS) using the ^ v keys. Pushing the ENTER Green Check Mark key will put this
setting into non-volatile memory. Pushing the Red X key will return to the original value
before it was changed. NOTE: the ENTER Green Check Mark key MUST be pushed to
retain this setting after power is cycled. This allows the user to test a setting before
committing it to memory. Note: ATB-300-9, 10 systems equipped with FM stereo base
band composite modules will have a factory default of -40 dB FS due to the inherently
higher noise level in composite systems. Manual operation is also available using the
rear panel remote connections. See “Remote Operation” for details.
ATB-300 Auto Mode
Pushing the F1/F4 key will alternate between the manual and auto modes. In auto mode
the display will indicate the currently selected channel and its activity status. The lower
line indicates the status of the priority memories and the activity status of the input
channel programmed into them. Pushing the UP and DOWN keys will allow previewing
the contents of each priority memory.
When the ATB-300 detects an audio level below the silence threshol d for the pr e
selected time interval it will look at the priority memories and switch the lowest priority
channel which is active to the out put. The display will indicate a loss o f audio on the top
line of the LCD and will indicate the input which was switched to the output on the lower
line along with its activity status. It will also close the fault detected relays contacts
available on the rear panel remote connector. Pushing the red X key will reset the
warning as well as the relays. If the rear panel remote is enabled, an input is provided to
do this using an external closure as well.
Figure 5 - ATB-300 Auto Mode Display
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AUDIO LOSS DETECTED
AUTO CH 5 AUDIO OK
Figure 6 - ATB-300 Silence Detected Display
Note that the ATB-300 is capable of detecting a subsequent loss of audio on the
channel that was automatically selected. If such an event should occur, the priority list
will again be used to select the first available active channel in the list.
Audio Restored Look Back Feature
The ATB-300 has the abi l i ty to monitor the designated pri mar y cha nnel a fter a loss of
audio has been detected by the silence sensor if the unit is in the automatic mode. If
audio is restored to the primary channel after a user programmed number of minutes
the unit will revert back to the primary channel automatically.
The factory default setting for the look back feature is disabled. To enable the look back
feature follow the procedur e bel ow:
1. Place the unit in the manual mode by pressing F1
2. Toggle F3 unt il the display says AUTO RETURN FUNCTION – factory default is
DISABLED.
3. Press the UP arrow to set the number of minutes the unit should wait before
reverting back to the primary channel only after audio has been restored to the
primary channel. The unit can wait from 1 to 60 minutes before reverting back to
the primary channel.
4. Place the unit back into the AUTO mode by pressing F1 twice. The first press of
F1 takes the unit out of the programming mode and into MANUAL. The second
press of F1 places the unit back into AUTO mode.
III. REMOTE CONTROLLED OPERATION
The ATB-300 provides remote inputs for channel selection via rear panel GPIO, via
Ethernet by use of the BDI Stack GUI and for all ATB-300 units with S/N 211 or greater
can utilize SNMP for use with SNMP enabled remote controls. The SNMP MIB is
contained on the CD provided with the unit and is also available for download from the
BDI web site under downloads. In addition to channel selection, to select between
manual and auto modes, reset a faul t w ar ni ng , selec tion of an input and to
enable/disable remo te oper ation is also available via all three methods. Open collector
status outputs are provided to indicate the currently selected input channel for GPIO.
These outputs are capable of sinking up to 100ma and are rated at a max i mum of 30v
DC.
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To enable remote operation the REMOTE ENABLE input must be connected to the
remote common (ground). Refer to page 12 Secti on VI. “ATB-300 Remote Connections”
diagram for connection information.
The REMOTE AUTO or REMOTE AUTO inputs are used to select the switching mode
by connecting the desired mode selection pin to remote common momentarily. To
enable remote channel selection, the ATB-300 must be in MANUAL mode.
When the ATB-300 is in MANUAL mode, connecting a remote channel select input to
remote common momentarily will cause the corresponding input to be selected as the
current output. ONLY ONE channel select input can be active. If more than one input is
selected simultaneously the ATB-300 will not switch.
IV. Input Mode Selection Menu Operation
The ATB-300 inputs can be configured for mode of operation on an individual basis.
Stereo, Mono Left, Mono Right, L+R and Stereo Swap can be configured from the front
panel. Use mono left and mono right to fill in a missing channel. For example; choosing
mono left will take a signal only input on the left channel and apply it to both channels at
the output of the unit. Use L+R to cre ate a monaural input from a ster eo so urc e.
To select the input mode push F4 once. The display will indicate that you are in the
INPUT MODE SELECTION menu. Select the input channel pair (1-8 ) using the up and
down arrow keys. The left and right arrow keys are then used to select between the
following modes:
Press F4 once: Input Mode Selection
Pushing the up arrow/down allows you to select the input channel to be changed:
Pushing the left/right arrow buttons allows selection of the following input modes:
OFF
Stereo - Factory Default
LR Swap - L/R Channels Swapped
Mono L - L input fed to both L & R outputs
Mono R - R input fed to both L & R outputs
L + R - L & R inputs are summed and fed to both L & R outputs.
The input mode is automatically saved when selected. To exit this menu
press the F1 key to return to the main menu.
Press F4 twice: Input Invert Control – Phase Inversion
Pushing the up arrow/down allows you to select the input channel to be changed:
Pushing the left/right arrow buttons allows selection of the following input modes:
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Normal
Invert Left
Invert Right
Note: Phase inversion is Left or right but not both simultaneously.
Input Invert Control modes are automatically saved when selected. To exit this menu
press the F1 key to return to the main menu.
Press F4 three times to enter Input Gain Control menu
Pushing the up arrow/down allows you to select the input channel to be changed:
Pushing the left/right arrow buttons allows you to adjust gain in one dB increments +/10 dB
Press F4 four times and the display will indicate Output Gain Control
Pushing the up arrow/down allows you to select the output channel to be changed:
Pushing the left/right arrow buttons allows you to adjust gain in one dB increments +/10 dB
Factory default for input and output gain controls is 0 dB. When factory default gains are
used AES3 I/O is unity. When AES3 inputs are output to an analog channel the analog
output will correspond to –10 dB below full scale AES3 input when AES3 input is
nominal – 10 dB below full scale.
ATB-300 Factory Default Recovery
As with any programmable device, it is possible that the user would like to quickly return
to the “factory default” settings. To return the ATB-300 to its factory configuration
remove AC power to the unit. While holding the red “X” key, restore AC power until the
display indicates “FACTORY DEFAULT”.
V. Audio I/O Connections
ATB-300 Audio Connections
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CH4 OUT
AESOUTP2
CH3 IN
AESOUTP4
AESOUTN3
AESINP1
AESINP2
AESINP4
AESINP3
DIGITAL AUDIO I/O
DB-25
1
14
2
15
3
4
5
6
7
8
9
10
11
12
13
16
17
18
19
20
21
22
23
24
25
CH2 OUT
AESOUTP3
AESOUTN1
AESINN4
CH1 OUT
AESINN2
CH3 OUT
AESINN1
CH1 IN
AESOUTP1
AESOUTN4
CH4 IN
AESOUTN2
CH2 IN
AESINN3
CH7N
CH7P
CH2P
CH5P
CH8N
CH5 LEFT
CH3N
ANALOG AU D I O - I N PU T & OUTPUT PIN OU TS ARE I D EN TIC AL
DB-25
1
14
2
15
3
4
5
6
7
8
9
10
11
12
13
16
17
18
19
20
21
22
23
24
25
CH5 RIGHT
CH 7 LEFT
CH1P
CH 6 RIGHT'
CH 7 RIGHT
CH 6 LEFT
CH8 LEFT
CH5N
CH6P
CH4N
CH3P
CH1N
CH6N
CH4P
CH8 RIGHT
CH8P
CH2N
INPUT CHANNEL
TYPE
LOCATION
1
DIGITAL
AES 1
2
DIGITAL
AES 2
3
DIGITAL
AES 3
ATB-300 AUDIO INPUT MAPPING – Dual AES Version
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4
DIGITAL
AES 4
5
DIGITAL
AES 5
6
DIGITAL
AES 6
7
DIGITAL
AES 7
8
DIGITAL
AES 8
INPUT CHANNEL
TYPE
LOCATION
1
DIGITAL
AES 1
2
DIGITAL
AES 2
3
DIGITAL
AES 3
4
DIGITAL
AES 4
5
ANALOG
ANALOG IN 1-2 (L/R)
6
ANALOG
ANALOG IN 3-4 (L/R)
7
ANALOG
ANALOG IN 5-6 (L/R)
8
ANALOG
ANALOG IN 7-8 (L/R)
INPUT CHANNEL
TYPE
LOCATION
1
DIGITAL
AES 1
2
DIGITAL
AES 2
3
DIGITAL
AES 3
4
DIGITAL
AES 4
5
ANALOG
COMPOSITE BASE BAND 1
6
ANALOG
COMPOSITE BASE BAND 2
7
ANALOG
COMPOSITE BASE BAND 3
8
ANALOG
COMPOSITE BASE BAND 4
ATB-300 AUDIO INPUT MAPPING – Hybrid AES/ANALOG Version
Note: BDI composite I/O interface panel connections should be made to analog inputs 5-8. This
connector has all inputs and outputs grouped together for all analog composite I/O of the ATB-
300. Note that while the panel designation is marked for 1-4 inputs that these are actually inputs 58 when viewed on the front panel display,
VI. Remote Control Connec t ions
ATB-300 Remote Connections
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+12V
SELECT-INPUT1
SELECT-INPUT2
SELECT-INPUT3
SELECT-INPUT4
SELECT-INPUT5
SELECT-INPUT6
SELECT-INPUT7
SELECT-INPUT8
STATUS1
STATUS2
STATUS3
STATUS4
STATUS5
STATUS6
STATUS7
STATUS8
K1-COM
K1-NC
K1-NO
AUTO
MANUAL
K2-NC
K2-NO
K2-COM
REMOTE ENABLE
FAU LT RESET
CHASSIS
AUTO-COM
REMOTE ENABLE COM
MANUAL-COM
FAU LT RESET COM
CHASSIS
INPUT COM
INPUT COM
INPUT COM
INPUT COM
INPUT COM
INPUT COM
INPUT COM
AUTO MODE STATUS OU T
REMOTE P2
DB-25 MALE (USER SU PPLI ED )
1
14
2
15
3
4
5
6
7
8
9
10
11
12
13
16
17
18
19
20
21
22
23
24
25
REMOTE P1
DB-25 MALE (USER SU PPLI ED )
1
14
2
15
3
4
5
6
7
8
9
10
11
12
13
16
17
18
19
20
21
22
23
24
25
FAUL T DETECT ED RELAYS
REMOT E I NPUT S
Notes:
VII. ATB-300 Audio Status
The ATB-300 provides audio status open collector outputs for each of the eight inputs.
Each Output is held low when audio is present. If audio is removed for at least five
seconds the respective channel will go to a high condition. If audio is restored for at
least five seconds the respective channel go low.
1. Status outputs are open collector Darlington transistors capable of sinking
100ma @ 30v DC.
2. Select and remote inputs are momentary closures with internal 4.7K pullup
resistors to 5v DC.
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+V
D
P1
GPI O 2
1
14
2
15
3
4
5
6
7
8
9
10
11
12
13
16
17
18
19
20
21
22
23
24
25
PIN 2 Audio Status Channel 1
PIN 16 Audio Status Channel 2
PIN 5 Audio Status Channel 3
PIN 19 Audio Status Channel 4
PIN 8 Audio Status Channel 5
PIN 22 Audio Status Channel 6
PIN 11 Audio Status Channel 7
PIN 25 Audio Status Channel 8
On all ATB-300 versions the audio status connections shown above are available on the
rear panel connection marked GPIO 2.
VIII. Frame Rate Conversion Switch Selection
The ATB-300 has active frame rate conversion on all AES3 digital inputs. The unit can
accept sample rates from 8 KHz to 96 KHz. The frame rate converte r then up or down
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converts the sample rate to the selected sample rate. The ATB-300 is capable of
IDC DB-25
J1
J2 J4
J3
J4
J1
J2
J3
P8 P7
P3
P5
S1
P1
P6 P1
FRONT PANEL REV B
FRONT PANEL REV C AND HIGHER
AS VIEWED FROM TOP W/ FRONT PANEL HINGED DOWN
AS VIEWED FROM TOP W/ FRONT PANEL HINGED DOWN
P5
P5
J5J2
J4
AES A UDIO I/O BOARD
DSP BOARD
GPIO BOARD
J2
REV B FP ONL Y
J1 J2
ANALOG AUDIO OUT BOARD
S1: 1-4-5 = ON
Hardwired
A0
A1
A2
INT
M/S
TDM
SR0
SR1
ON
12345678
S1
AES I/O Board
Switch Settings
32 KHz Output Sample
Rate
A0
A1
A2
INT
M/S
TDM
SR0
SR1
ON
12345678
S1
44.1 KHz Output Sample
Rate
A0
A1
A2
INT
M/S
TDM
SR0
SR1
ON
12345678
S1
48 KHz Output Sample
Rate
S1
ON
A2
A1
A0
INT
S1
S1
All On
On
outputting 32, 44.1 or 48 KHz sample rates. The factory default sample rate is 44.1
KHz. To change the sample rate to either 32 or 48 KHz refer to the diagram below. The
sample rate converters are located on the AES I/O board. Locate S1 and change SR0,
SR1 according to the chart below. Do not adjust any other DIP switch setting as this will
result in incorrect operation of the ATB-300. Correct DIP switch settings are provided for
convenience.
IX. Ethernet Setup
The BDI Audio Toolbox series including the ATB, GPM and DAB versions of the product
line now support Ethernet through use of BDI’s BDI Stack Graphical User Interface.
Now the Audio Toolbox series switchers can be remotely controlled and monitored via
an Ethernet connection. All Audio Toolbox series products also provide standard GPIO
interface for remote control as well.
I. Ethernet Setup
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After installation of the unit connect your unit to a router connection or directly to a
laptop using the RJ45 LAN connection on the rear of the unit. The default IP address is:
192.168.1.150. Port 161 is default from the factory and can be reset but make certain
that the new port is forwarded for external access if desired. After entering IP address
through a standard browser and the screen below should appear:
The factory defaults are:
Username: username
Password: password
Use all lower case.
Once you enter the username and password click on the Green Arrow and the screen
below should appear:
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Make the appropriate changes and to save them click the Green Check Mark Key. We
strongly recommend that your record the parameters changed here:
NEW IP ADDRESS: __________________________
NEW IP MASK: ___________________________
Primary DNS: ___________________________
Gateway: ____________________________
Serial Port Data: ____________________________
Username: ____________________________
Password: _____________________________
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Make certain that for outside access to the u nit that the serial data port chosen is forwarded on your router. If this is not done your computer will not b e able to see the unit from outside of your router environment.
Once you have made and recorded the changes to the IP environment power cycle the
unit for the new parameters to take effect. The new parameters only take effect after
a power recycle.
After power cycling the unit use the new IP address, username and password to enter
the IP configuration screen to make sure that the parameters were accepted. Once you
have successfully entered the IP configuration page the unit is now ready for use with
the BDI Stack software provided on the CD packed with the unit and the Audio Toolbox
Setup program that allow the user to name the inputs and outputs of the unit so that
when the unit is accessed from the BDI Stack software that familiar names will appear
making the unit easier to interpret. There are technical reference manuals for each
program to guide you through the setup process.
SNMP Support
All ATB-300 units starting with S/N 211 are SNMP agent v2 enabled. The unit can be
remote controlled and monitored by use of the ATB Audio MIB file which is contained on
the CD that was supplied with the unit. The MIB is also available from our web site on
the download page. The MIB can be used with any SNMP enabled remote control and
the unit can be setup for channel naming, unit name/location by use of a standard MIB
browser.
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X. Warranty
Broadcast Devices, Inc. products are warranted against failure due to faulty materials
or workmanship for a period of one year from the date of shipment to the ultimate user.
The warranty covers repair or replacement of defective parts at the factory, provided the
unit has been returned prepaid by the user. All shipments to the factory shall have
affixed to the outside of the container a return authorization number obtained from the
factory. The above warranty is void if the unit has been modified by the user outside of
any recommendations from the factory or if the unit has been abused or operated
outside of its electrical or environmental specifications. If customer conducted field tests
suggest that the unit may be faulty, whether or not the unit is in warranty, a full report of
the difficulty should be sent to Broadcast Devices, Inc. factory at Cortlandt Manor, New
York. The office may suggest further tests or authorize return for factory evaluation.
Units sent to the factory should be well packed and shipped to Broadcast Devices,
Inc. Check our website for current shipping address. Remember to affix the R.A.
number to the outside of the carton. Any packages received without such R.A. number
will be refused. Note: freight collect shipments will also be refused. When the unit has
been received, inspected and tested, the customer will receive a report of the findings
along with a quotation for recommended repairs, which are found falling outside of the
standard warranty. Units returned for in-warranty repairs, which are found not to be
defective will be subjec t to an ev aluat ion and handling charge. In-warranty units will be
repaired at no charge and returned via prepaid freight.
Out-of-warranty units needing repair require a purchase order and will be invoiced for
parts, labor, and shipping charges.
When ordering repla c eme nt par t, always specify A) Part Description, and Quantity; B)
Date of Purchase, Where Purchased; C) Any Special Shipping Instructions. Always
specify a street address, as shipping companies cannot deliver to a postal box.
Broadcast Devices, Inc. is not responsible for any other manufacturer’s warranty on
original equipment. Nor are we responsible for any failure, damage, or loss of property
that may occur due to the installation or operation of our equipment outside of
recommended specifications.
Broadcast Devices, Inc. reserves the right to change materials, specifications, and
features from time to time.
www.broadcast-devices.com
Broadcast Devices, Inc.
Email: Customer.Service@broadcast-devices.com
(914) 737-5032 Tel. (914) 736-6916 Fax.
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