AES-302 Digital Audio Switcher - Broadcast Devices, Inc.

Broadcast Devices, Inc.
Technical Reference Manual
AES-302 Digital Audio System
Two Input Digital Audio Switcher
Four Output Digital Distribution System
96 KHz – 24 Bit Digital to Analog Converter
Broadcast Devices, Inc.
5 Crestview Avenue
Cortlandt Manor, NY 10567
Tel. (914) 737-5032
Fax. (914) 736-6916
World Wide Web: www.Broadcast-Devices.com
Rev C. 02/07

2
Table of Contents
I. Introduction 3
II. Unpacking 3
III. Installation and Connections 3
IV. Features and Operation 3
V. Initial Operations Setup 4
Theory of Operation – Digital Switcher 5
Error Switching Table 1. 5
Silence Sensor Setup Table 2. 5
Remote Control Pin out Table 3. 6
VI. Specifications 7
VII. Warranty 8
VIII. Schematic Diagrams 9-12

3
I. Introduction
The AES-302 Digital Audio System comprises of a two input AES compatible switcher, four output
digital audio DA and digital to analog converter. The unit also has status and diagnostic error indicators for
troubleshooting. The AES-302 is intended for use at unattended transmitter sites or for virtually any digital
switching, distribution and/or D/A conversion application. The unit has the capability to automatically
switch inputs upon detection of loss of clock, digital error flags and/or silence sense. In addition to these
features, the unit can function as an interface standards converter. As shipped from the factory the unit is
supplied with XLR balanced connectors. The unit can be configured with any combination of input/output
connectors if desired. Default factory supplied connections are XLR. Optical and S.P.D.I.F – RCA
connections are available as options.
II. Unpacking and Inspection
Carefully inspect the unit after unpacking and make certain that no damage has occurred during shipping.
If damage is noted, contact the shipper immediately and file a claim for damages. Each unit is carefully
packed and carries full insurance against damage. Inspect the packing list and make sure that the contents
of the package match those described on the packing list.
III. Installation and Connections
Select a space in suitable E.I.A. standard rack to locate the unit. Determine the local electrical power
supply voltage and select the proper input voltage at the rear of the unit. As supplied from the factory, your
AES-302 is setup for 120 V.A.C. 60 Hz unless noted otherwise. To change the input voltage to 240 volts,
simply slide the plastic cover and remove the p.c. board in the E.M.I. protected power entry module and
flip it so that “240 Volts” is legible from the rear as the board is placed back into the power entry module.
No replacement of the fuse is necessary as the fuse supplied is rated for up to 250 V.A.C. operation. The
unit is rated to run from 120/240 V.A.C. at 50 to 60 Hz operation. Make connections to the unit following
good engineering practice. Supply power to the unit utilizing a three pronged grounded outlet. Do no lift
the electrical ground to the unit at the power receptacle as this will result in a safety hazard. In the event of
ground loops, lift the ground at the offending connection only. Make certain that the unit is afforded proper
ventilation in the area of the top cover vent.
A. Digital Interface
Unless ordered as an option Inputs to the switcher are balanced XLR connectors conforming to the AES
standard. The unit may be ordered with SPDIF or optical interface. Each XLR connection is terminated at
110 ohms as per the standard. SPDIF inputs are terminated at 75 0hms. The balanced digital outputs are
also XLR connections, which provide 110-ohm transformer coupled source impedance as per the standard.
Again as an option outputs can be configured for SPDIF or optical interface.
B. Analog Interface
There is provided on the rear of the unit a left/right balanced analog output. This output is suitable for
driving 600-ohm balanced lines and is short circuit protected. A headphone jack and volume control
buttons are provided on the front panel of the unit for confidence monitoring of the incoming feed.
IV. Features and Operation
The AES-302 Digital Audio System is designed to select one of two AES3 compatible feeds and route it to
up to four balanced, optical or unbalanced digital loads. It also contains a high quality digital to analog

4
converter providing a balanced left and right output. The unit features a front panel headphone output and
volume control for easy confidence monitoring. The AES-302 can be used as a totally automatic switcher
sensing loss of clock or any error displayed on the front panel to command the switcher to select the
alternate feed. In addition to digital error switching, the unit features a silence sense circuit for switching
upon audio failure conditions. All automatic switching functions are user defined and can be initialized
with a simple DIP switch setting upon installation of the unit. Command of the switcher can also be
performed manually at the front panel or remotely.
Remote control of the unit is accessed through the rear panel 9 pin D connector. Simple momentary ground
closure to the appropriate pin selects channels and error reset. Status of channel selected and error flag is
also available at this connector. Refer to the pin out table 3 on page 6 for connection information. The
interface is compatible with open collector command. The AES-302 supplies +15 V.D.C. for powering
open collector actuators.
Two additional features that have been added to later production AES-302 units includes power fail feed
through of the selected input to AES output #1 and a delay circuit has been added to the automatic
switching function. With no power connected to the unit, the AES-302 will pass the last selected input
signal to the #1 AES output through K3 NC contacts. Upon power application K3 energizes and AES #1
output receives its signal from U2 RS-485 driver. The additional delay was added to prevent the unit from
switching on momentary glitches that can occur in STL equipment. An added 3 seconds to the switching
time prevents the unit from switching under transient conditions.
V. Initial Operating Set up
Attach input and output connections to the unit using the appropriate connector. The unit can be supplied
with XLR, S.P.D.I.F., or optical connectors at any of the inputs or outputs. If the connector scheme
supplied is not the one desired, consult the factory for a field or factory connector modification.
Plug the remote control plug in and tighten the connector screws in place.
You may select any or all of the error flag and/or silence sense switching, which will command the
switcher to switch to the alternate path. The “no lock” position S6-2 is always selected for automatic
operation. Other error flags and the silence sense error are selected by placing the designated DIP switches
to the on position. Refer to the theory of operation section table 1 on page 5 for possible settings. Once
this is done, the unit is ready to be powered up for operation. The default setting is to command the
switcher upon loss of clock. When the silence sense error is selected for switching, there are several
configurations possible. It is possible to monitor both left and right channels and switch upon complete
audio loss or to have the silence sensor switch upon loss of left or right channel individually. This feature
was added so that non correlated audio feeds can cause the silence sensor to switch where one feed may
take precedence over another. Selection of L+R, Left, or Right only audio is done by placing the proper
jumpers on the motherboard. Refer to the theory of operation section table 2 on page 5 for the various
settings.
Once power is applied and a valid AES bit stream is applied to the selected input, the unit will default to
“Manual” mode of operation. The LED indicator over the “Manual” button should be illuminated. In
addition, the channel selected LED indicator will be lit. There should also be an indication of sample
frequency. Press the error-reset button to clear any errors that might be indicated. If the digital audio stream
feeding the active channel of the unit is valid and no errors occur the unit is ready for to be placed in the
automatic mode if desired. If any of these errors occur after depressing the error-reset button, then the feed
to the unit is defective and should be investigated. If all is in order, the unit is now ready for operation. All
that is left to do is to select the desired feed and then if desired, place the unit in automatic switch mode by
depressing the “Auto” button. The LED indicator will light indicating automatic control of the switcher.
The unit will remain in this mode until an error is detected, loss of lock occurs, silence is detected or the
alternate feed is manually selected. If any of these events occur, the unit will switch to the alternate path

5
and remain there until the error reset is performed from the front panel or remotely. Please note that the
Auto light will remain lit after an automatic switch but that the unit will perform no further
switching until the error reset is performed. This feature insures that the unit will switch only once after
error or loss of clock is detected and prevents the unit from “hunting” back and forth. In addition, errors
and lock loss indications are held in a buffer until cleared by the error-reset button. This is provided for
troubleshooting purposes. If power is lost to the unit, the AES-302 will reset to “Manual” operation upon
reapplication of power and remain in the channel last selected before power loss.
Theory of Operation – Automatic Switcher Circuit.
The AES-302 is designed to operate in automatic and manual switching modes. Upon application of power
the unit defaults to the manual mode. In this mode switching between channels can only be accomplished
by pressing the desired channel button or commanding the desired remote control pin. With power
application C37 pulls the clock pin 3 of U6A low thus placing the IC in the reset mode whereby pin 1 Q
output is pulled low. This in turn cuts off Q2 preventing automatic switching from occurring. Depressing
the “Auto” front panel button places the unit in automatic operation. The actuation of the “Auto ” button
places a high on pin 6 of U6A which in turn sets Q output high enabling Q2. When an error or silence
sense timeout occurs, a delay of approximately 3 seconds is provided via U16 LM741 which acts as a
comparator. Once the delay of U16 times out the comparator flips pulling the base of Q4 low which
saturates Q3 momentarily. Momentary operation of Q3 is due to C45 being in an initially discharged state.
When Q3 is turned on C45 begins to charge enabling Q3 to pass current. This same current passes through
Q2 whose collector is routed to the proper coil of K1, which is the signal routing relay. K1 fires and
switches to the alternate path. No further switching will occur because the error signal is still present on the
base of Q4. This error signal will remain until the error-reset button is pressed. Once the reset occurs, U16
changes output state back to a positive condition which causes Q4 to be saturated. Once Q4 saturates Q3 is
cutoff and C45 begins to discharge through R32. CR19 prevents unintentional operation of the automatic
switch circuit when errors are reset by momentarily cutting off Q2. C38 aids in preventing unintentional
operation by holding the base of Q2 low until the error has had sufficient time to clear.
The silence sensor accepts audio from the left/right output of the AES-300 module via jumpers J-1 and J-2.
To select both channels place both jumpers in the position closest to the front of the unit. For left channel
only place only J1 in the forward position. For right only place J2 in the forward position. The audio is
then amplified by U15A and is rectified by CR20. The D.C. output of CR20 is then fed to C56 which
stores the D.C. sample until a loss of audio occurs. Once loss of audio is encountered, C56 begins to
discharge through R56 and/or R59. After a time delay of 30 or 60 seconds U15B-7 goes negative and is
clamped by CR22 to 0 volts D.C. This 0 volt indication causes CR21 to conduct pulling the base of Q4 low
which initiates the switching action as described above. If silence sensing is not desired, place S6-6 in the
off position.
Any or all of the errors that appear on the front panel display can be made to actuate a switching operation.
Factory default is all error and silence sensing selected. To change this configuration, remove the top cover
and locate S6 on the motherboard. Refer to table 1 below for switch settings:
Error Switch Actuation Table 1
S6-1 Coding
S6-2 Unlock (must be selected for auto operation)
S6-3 Parity
S6-4 CRC
S6-5 Slipped Sample
S6-6 Silence Sensor
S6-7 30 seconds *
S6-8 60 seconds
* For 30 second delay place both S6-7 and S6-8 in the “On” Position

6
Silence Sensor Setup Table 2
J1/J2 in place
J1 in place J2 removed
J1 Removed J2 in place
L+R – default
Left only causes silence sensing
Right only causes silence sensing
Remote Control Pin out Table 3
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
+15 VDC @100mA.
No Connection
Select B Input
Select A Input
Error Reset
Status Relay Common
Status – “B” Selected
Status - “A” Selected
Ground
Command input pins 3, 4, 5 require a momentary closure to ground. Status connections are to dry contacts.
Use no more than 24 VDC on these contacts or damage to the relay can occur.

7
VI. Specifications
Digital Inputs:
Digital Outputs:
Analog Output:
Two – Any combination of XLR, SPDIF or Optical
Four – Any combination of XLR, SPDIF or Optical
Balanced L/R XLR + 4 dBm 600 Ohms – Rear Panel
Headphone out 600 Ohm unbalanced - Front Panel
Sample Rate Range:
D/A Converter Resolution:
Remote Control:
Remote Status:
Front Panel Controls:
Front Panel Indicators:
Power Requirements:
Operating Environment:
Physical:
8 – 96 KHz, Auto Detect and Lock
up to 24 bits
Momentary ground closure selects channels and
resets auto mode operation
Channel Select Dry Contact NO/C/NC
7 - Momentary Push buttons - Switcher Selection,
Error Reset, Auto/Manual Mode Operation Select,
and Volume Up/Down
Sample Rate, Lock Loss, Error Flags, Power Supply
Status, Channel Status, Auto/Manual Mode
120/240 V.A.C. @ 0.25A; 50 – 60 Hz.
0 – 60 Degrees Celsius Non Condensing Atmosphere
19”W X 8”D X 1.75”H Mounted via Standard E.I.A.
19” rack one rack unit occupied. Weight: 9 LBS.

8
VII. 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 an R. A. 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 in the original packing if possible and shipped to
Broadcast Devices, Inc. 5 Crestview Avenue, Cortlandt Manor, NY 10567. 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 subject to an evaluation 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 replacement part, always specify A) Part number or 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. may from time to time make changes to the materials used in the manufacture of
its equipment and reserves the right to do so without further notice.

VIII. Schematic Diagrams
9

5
7
1
1
2
8
8
5
5
7
5
1
4
3
3
3
3
3
3
3
3
4
3
2
1
D
C
B
A
J2
HDR3
+5V
+5V
+5V
+5V
3
2
1
R42
8.2K 1/4W
TXP1
R44
8.2K 1/4W
TXP3
R43
8.2K 1/4W
TXP2
R45
8.2K 1/4W
TXP4
AUTO DEF
AUTO EN
R37
1K 1/4W
CR2
1N4007
C7
1
2
3
4
5
6
U10
TOTX176
GND
RLED
Vcc
INPUT
N/C
N/C
RESET ERR
C37
.1 50V
.1 50V
CR6
1N4007
C19
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
CR4
1N4007
C12
.1 50V
.1 50V
CR8
1N4007
C25
.1 50V
U7
TOTX176
GND
RLED
Vcc
INPUT
N/C
N/C
U9
TOTX176
GND
RLED
Vcc
INPUT
N/C
N/C
U8
TOTX176
GND
RLED
Vcc
INPUT
N/C
N/C
+15V
-DC
+DC
R28
10K 1/4W
C3
4700uF 50V
C15
4700uF 50V
+15V
+5V
RSTERR
R38
1K 1/4W
96KHZ
88KHZ
48KHZ
44KHZ
32KHZ
RANGE
R21
1.3K 1/4W
R23
470 1/4W
AUTODEFSW
AUTOENSW
C4
.1 50V
R7
C16
.1 50V
R14
1.3K 1/2W
C26
.1 50V
SELCH1
LEDCH1
RSTERR
VOLUP
+15V
DS2
AUTOENSW
AUTOENLED
CM5693
DS4
CM5693
CR1
U1 1N4007
LM337
2
Vi Vo
3
1.3K 1/2W
CR5
U4 1N4007
LM317
3
Vi Vo
2
DS5
ADJ
ADJ
CR9
U5 1N4007
LM7805
1
Vi Vo
3
3
4
5
6
GND
CM5693
U6A
MC14013B
CLK Q
RESET
D
SET /Q
GND
C39
VDD
14
.1 50V
C35
.1 50V
1
2
+15V
R22
CR19
1N914
P4
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
HDR16DUAL
R5
120 1/2W
R11
120 1/2W
CR10
1N4007
1.3K 1/4W
96KHZ
88KHZ
48KHZ
44KHZ
32KHZ
RANGE
F-LED
C27
.1 50V
-15V
+15V
AUTOENLED
AUTODEFLED
SELCH2
LEDCH2
VOLDN
AUTODEFSW
AUTODEFLED
C5
.1 50V
P1
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
R25
CR3
1N4007
C10
4.7uF 50V
CR7 C17
1N4007 .1 50V
C20
HDR16DUAL
100K 1/4W
4.7uF 50V
+5V
Q1
2N3906
R27
1M 1/4W
R29
100K 1/4W
C38
22uF 25V
SLIPSAMP
CRC
PARITY
CODING
NOLOCK
SEL
E-LED
C45
22uF 25V
-15V
+15V
C28
3300uF 25V
C6
3300uF 25V
C18
3300uF 25V
VOLUP
VOLDN
Q3
2N3904
R32
47K 1/4W
LEDCH1
+5V
+5V
CR11
1N914
CR14
1N914
1N914
SILENCE
C58
4.7uF 25V
DS1
2
7
3
CM5693
DS3
CM5680
CR16
Q2
2N3904
2
7
3
Q4
2N3904
+15V
U13
DS1669-100
UP RH
DN RW
DIG RL
V+
U14
DS1669-100
UP RH
DN RW
DIG RL
V+
SLP SAMP
CRC ERR
PARITY
CODING
UNLOCKED
CR13
1N914
CR15
1N914
R36
R46
1.00K 1% MF
.1 50V
C52
+15V
V-
V-
1
6
4
R48
1.00K 1% MF
.1 50V
C53
CR21
1N914
R30
10K 1/4W
1
6
4
10K 1/4W
C44
4.7uF 25V
R33
100K 1/4W
R34
68 1/2W
R47
10.0K 1% MF
R49
10.0K 1% MF
1
2
3
4
5
6
7
8
R58
150K
R59
150K
4
13
1
16
LAUDIO
J11
HDR3
RAUDIO
J12
HDR3
S6
K2
1
2
3
1
2
3
SW DIP-8
Q5G6A-235P
2N3904
R50
1K 1/4W
SILSELIN
6
8
11
9
16
15
14
13
12
11
10
9
SELCH1
SELCH2
R3
1.00K 1% MF
R12
1.00K 1% MF
+5V
C9
4.7uF 50V
C22
4.7uF 50V
CR24
1N914
J13
HDR3
CR23
P2
R62
1K 1/4W
-15V
2
3
+15V
1
2
3
1N914
C57
.1 50V
C1
200pF 50V
8 4
-
+
C23
200pF 50V
6
5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
-
+
C11
DIGOUT
+15V
-15V
R1
10K 1% MF
4.7uF 50V
C8
.1 50V
NE5532AD8
1
U3A
C13
C14
4.7uF 50V
.1 50V
R13
10.0K 1% MF
NE5532AD8
7
U3B
R60
INPUT-N
INPUT-P
-15V
+15V
1K 1/4W
U16
LM741
+ 3
6
- 2
R55
1K
R57
1K
1
2
3
J14
HDR3
SILENCE
LAUDIO
+15V
C2
150uF 50V
C24
150uF 50V
CR22
1N914
C36
.1 50V
R56
100K
-15V
2
3
+15V
RAUDIO
8 4
-
+
R61
4.75K 1/4W
R63
470 1/4W
R4
100 1/2W
R16
100 1/2W
R52
1K
C54
.1 50V
TLO72
1
U15A
C55
.1 50V
+15V
HEADPHONE
TLO72
7
U15B
+15V
R19
68 1/2W
CR12
1N914
J4
-
+
6
5
CR20
1N914
C56
470uF 16V
R26
1.3K 1/4W
CR18
1N914
DIGOUT
+5V
R54
1K
SILSELIN
2
15
3
4
13
14
1
16
1
15
7
9
4
12
R53
1K
K1
U2
EN
EN
VCC
GND
26LS31
R51
RESET
5
7
6
8
11
9
12
10
SET
1.3K
T84S17D434
INPUT-P
INPUT-N
2
3
+15V
LEDCH1
LEDCH2
RYCH1
RYCH2
R2
54R9 1/4W
14
13
6
5
10
11
16
8
TXP1
TXP2
TXP3
TXP4
+5V
C21
.1 50V
C46 U11
C47
.01 50V TORX176
.01 50V
RXP1
1
RXP2
L5
OUT
2
L6
DGND
+5V
3
47uH
Vcc +5V
4
47uH
AGND
5
C48
CASE
6
C49
.1 50V
CASE
.1 50V
C34
.1 50V
C50
.01 50V
{}
6
8
11
9
R6
54R9 1/4W
Title
K3
G6A-235P
R17
300 1/4W
R18
300 1/4W
C51
.01 50V
R31
300 1/4W
R35
300 1/4W
4
13
1
16
R8
54R9 1/4W
R9
54R9 1/4W
R10
54R9 1/4W
R40
54R9 1/4W
R15
54R9 1/4W
R41
54R9 1/4W
C33
.1 50V
L1
.47mH
C29
.0033uF
C31
.0033uF
L2
.47mH
L3
.47mH
C40
.0033uF
C42
.0033uF
L4
.47mH
2
1
2
1
+15V
T2
C30
.0033uF
+15V
3 6
5
Schott-67137640
2
1
2
1
T1
3 6
5
Schott-67137640
R64
68 1/2W
T3
T4
C32
.0033uF
RSTERR
SELCH1
SELCH2
RYCOM
F1
PTC
C41
.0033uF
C43
.0033uF
Broadcast Devices, Inc.
AES-302 MAIN BOARD
4
4
4
3 6
5
Schott-67137640
4
3 6
5
Schott-67137640
1
2
3
4
5
6
L-OUT
INPUT 1
INPUT 2
R-OUT
Size Document Number Rev
C
E
2
2
2
2
2
2
R20
110 1/4W
U12
TORX176
OUT
DGND
Vcc
AGND
CASE
CASE
2
R24
110 1/4W
FB1
FB
2
5
9
4
8
3
7
2
6
1
J1
J3
J5
J6
J7
J8
J9
P3
DB9F
J10
4
1
4
1
4
1
4
1
4
1
4
1
4
1
4
1
CHASSIS
D
C
B
A
Thursday, February 08, 2007
Date: Sheet of 1 1
5
4
3
2
1

5
4
3
2
1
D
D
S1
S2
INPUT 1
RESET ERR
S5
C
VOL UP
AUTO EN
+15V
S8
S4
SELCH1
LEDCH1
RSTERR
VOLUP
+15V
AUTOENSW
AUTOENLED
1
3
5
J4A
2
4
6
7 8
9 10
11 12
13 14
15 16
SELCH2
LEDCH2
LEDERR S7
VOLDN
S3
AUTODEFSW
AUTODEFLED
+15V
INPUT 2
AUTO DEF
C
HDR16DUAL
R39
1.3K 1/4W
B
B
A
Title
Broadcast Devices, Inc.
AES-302 FRONT PANEL BOARD
A
Size Document Number Rev
A
C
5
4
3
Date: Thursday, September 04, 2003 Sheet 2 of 2
2
1

5
4
3
2
1
D
C
B
A
4.7K 0805
RXP
FROM P1
VD+
VD+
RXN
F0
F1
F2
E0
E1
E2
R5
4.7K 0805
D
D
C5
R3
.1 0805
VD+
1
2
3
4
5
6
1
2
3
4
5
6
4.7K 0805
4.7K 0805
D
D
8
GND
A0
A1
A2
E1
E2
E3
8
GND
A0
A1
A2
E1
E2
E3
VD+
R6
4.7K 0805
C39
C40
R24
.1 0805
U7
74HC138
.1 0805
U8
74HC138
4.7K 0805
2
1
16
VCC
O0
O1
O2
O3
O4
O5
O6
O7
16
VCC
O0
O1
O2
O3
O4
O5
O6
O7
5
R21
4.7K 0805
R4
T2
VD+
15
14
13
12
11
10
9
7
VD+
15
14
13
12
11
10
9
7
PRO~
VD+
VD+
TXM2
TXM1
TXM0
V
C
U
VD+
CBL
RST~
4.7K 0805
R25
8
4 5
6
Schott-37246
RANGE
RXM0
RXM1
RXM2
RXM3
R22
96KHZ
88KHZ
48KHZ
44KHZ
32KHZ
SLIPSAMP
CRC
PARITY
CODING
NOLOCK
4
3
2
1
24
23
22
21
9
10
11
12
13
14
15
16
C41
.1 0805
VD+
U1
C6/C2
C1/FC0
PRO
C7/C3
CRE/FC1
M2
M1
M0
V
C/SBF
U
C9/C15
EM1/C8
EM0/C9
CBL/SBC
RST
CS8404
D
1
2
3
4
5
6
D
4
2
DIP1
SW DIP-6
U9
VCC
GND
6.144MHZ
5
4
3
2
1
DIP3
12
11
10
9
8
7
VD+
TXP
TXN
MCK
SCK
FSYNC
SDATA
75 0805
SW DIP-5
OSC
VD+
GND
NC
6
7
8
9
10
4.7K 0805
R17
3
1
20
17
19
18
5
6
7
8
110 0805
R33
4.7K 0805
D
FCLK
R1
374 0805
R2
154 0805
VD+
C1
.1 0805
R18
4.7K 0805
R36
4
C
U
SDATA
FSYNC
SCK
MCK
.068 POLY
VA+
RST~
VD+
R19
470 0805
C12
VA+
VD+
96KHZ
P2
1 2 SLIPSAMP
VA+
88KHZ 3 4 CRC
48KHZ
44KHZ
32KHZ
5
7
9
6
8
10
PARITY
CODING
NOLOCK
VD+ R38 RANGE 11 12 SEL R39 VD+
F-LED 13 14 E-LED
270 0805
15 16
VD+
270 0805
D
HDR16DUAL
R34
4.7K 0805
4.7K 0805
C7
.1 0805
R37
SW DIP-8
R8
90.9 0805
R35
1
2
3
4
5
6
7
8
DIP2
16
15
14
13
12
11
10
9
CS8414
C11
PRO~
TXM2
TXM1
TXM0
U2
1 C
C0/E0
6
14
5
U
CA/E1
25
4
ERF
CB/E2
26
3
SDATA
CC/F0
11
2
FSYNC
CD/F1
12
19
9
10
22
21
20
13
12
11
10
1
15
16
SCK
MCK
RXP
RXN
VA+
AGND
FILT
U4
SDATA
LRCK
SCLK
MCLK
RST~
MUTE~
5
M0
14
M1
4
M2
3
M3
2
M4
CS4396
C/H~
VREF
28
VD
VD
1uF 10V
C13
VA
22
.1 0805
7
8
C29
.1 0805
C30
CE/F2
M3
M2
M1
M0
VERF
SEL
CS12/FCK
DGND
DGND
AGND
AGND
18
21
1uF 10V
CBL
VD+
DGND
6
9
AOUTL+
AOUTR+
MUTEC~
FILT+
LOUT-
AOUTL-
AOUTR-
FILT-
CMOUT
D
27
17
18
24
23
28
16
13
15
7
8
24
23
19
20
17
27
26
25
470K 0805
VD+
E0
E1
E2
F0
F1
F2
RXM3
RXM2
RXM1
RXM0
V
FCLK
CBL
D
C33
.1 0805
D
R32
VD+
3
2 T1
1
4 5
6
Schott-37246
C10
.1 0805
SEL
22uF 25V 22uF 25V
C19
22uF 25V 22uF 25V
C35 C36
22uF 25V 22uF 25V
C37 C38
C31
.1 0805
C16
C24
1uF 10V
R14
C18
FROM P1
C34
10uF 25V +15V
RST~
D
8
C20
22uF 25V 22uF 25V
C32
10uF 25V
4.7K 0805
D1
FDSO-1203
TXP
FROM P1
TXN
R11
10.0K 1% MF 0805
R12
10.0K 1% MF 0805
R15
10.0K 1% MF 0805
R27
10.0K 1% MF 0805
R28
10.0K 1% MF 0805
R30
10.0K 1% MF 0805
C25
10uF 25V
C26
.1 0805
D
-15V
2
3
+15V
-15V
+15V
8 4
-
+
C14
NE5532AD8
1
U3A
200pF MICA 1210
2
3
C2
200pF MICA 1210
8 4
-
+
U6
LM340MP-5.0
1 3
Vi
GND
GND
2
4
Vo
C27
.1 0805
R7
10.0K 1% MF 0805
C4
10uF 25V
R20
10.0K 1% MF 0805
NE5532AD8
1
U5A
C8
10uF 25V
C17
10uF 25V
C22
10uF 25V
VD+
VA+
2
C3
.1 0805
C6
.1 0805
C15
.1 0805
C21
.1 0805
C28
470uF 10V
L1
FB
L3
FB
6
5
6
5
Title
-
+
-
+
R9
27R 1210
R13
10.0K 1% MF 0805
C9
200pF MICA 1210
NE5532AD8
7
R23
U3B
27R 1210
NE5532AD8
7
U5B
R26
27R 1210
NOTES:
1. AGND & DGND TIED 1 POINT ONLY.
2. VD+ & VA+ TIED ONLY AT VREG.
3. ALL RESISTORS 5% EXCEPT AS NOTED.
L2
FB
R16
10.0K 1% MF 0805
R29
10.0K 1% MF 0805
L4
FB
R31
C23 10.0K 1% MF 0805
200pF MICA 1210
R10
27R 1210
LOUT+
ROUT+
Broadcast Devices, Inc.
AES3 RX/TX/DECODER
Size Document Number Rev
B AESD2
A
Date: Wednesday, May 30, 2001 Sheet 1 of 1
1
ROUT+
ROUT-
ROUT-
LOUT-
LOUT+
RXP
RXN
TXP
TXN
-15V
+15V
P1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
D
C
B
A