Audio Authority 1821 User manual

User Manual
Model 1821
Digital Audio Demonstrator

Introduction
The Audio Authority®1821 delivers digital audio to four devices such as A-V
receivers or sound bars. It provides digital Toslink®connections for input, bus
output (for expansion capabilities), and four product outputs. In distribution
mode, all outputs are active. In switching mode, outputs may be selected via
push-buttons, TouchSelect panels, or compatible RS-232 control device.
Features
• Digital audio switching for four output positions
• Distribution mode: one in, four out, all positions active
• Digital audio bus output, always active
• RS-485 control (compatible touch panels sold seperately)
• RS-232 control
Push-Buttons
To use push-buttons for product selection, connect RJ9 style Easy Plug switches
to each position. Push-buttons and cables in several colors and lengths are
available from Audio Authority.
Easy Plug push-button with RJ9 connector (PN 013-100).
POWER
INPUT
POWER
BUS
FIRMWARE
UPDATE
MICROSD
RS-232
PORT A
RS-485
BUS
RS-232
PORT B
DIGITAL
AUDIO
INPUT
DIGITAL
AUDIO
BUS
DIGITAL AUDIO
OUTPUTS
PUSH-BUTTONS
FEATURE
SWITCHES
RS-232 A
NULL/STRAIGHT
SWITCH
RS-232 B
NULL/STRAIGHT
SWITCH

RS-485 Bus and TouchSelect Panels
TouchSelect panels may be used to select product
positions. TouchSelect panels transmit the touch
location and panel address over the bus to the 1821.
By default, button commands match up with the
TouchSelect touch positions, therefore TouchSelect
position 1 triggers the command for output 1.
RS-232 Ports
The RS-232 Baud rate is 57600 and each port may
be set for Null or Straight using the switch located
beside each RS-232 port (A & B). By default Port A is set to null modem, and Port
B is set to straight modem. The ports are modular RJ-45 jacks; adapter cables are
available for 3.5mm or DB-9 serial ports.
Switch Settings
Choose the desired features and select using the Feature Switches as shown. If
a switch is shown with a dash, it can be ON or OFF while using the feature. After
making changes to the Feature Switches, cycle power to the 1821.
Timeout Mode
When Switch 1 and/or 2 is ON, the demo ends after a period of inactivity. The
timeout interval is the amount of time after the last button press until the demo ends
and attract mode begins. Adjust the length of the timeout interval using the settings
below. The demo never stops playing when all switches are OFF.
TIMEOUT SWITCH SETTINGS:
MINUTES 1 2 3 4
NONE OFF OFF OFF -
ONE OFF ON OFF -
TWO ON OFF OFF -
THREE ON ON OFF -
Distribution Mode
When Switch 3 is ON the 1821 functions as a distribution amplier (the demo never
times out in DA mode). In DA Mode, all audio positions are active.
DA MODE SWITCH SETTINGS:
1234
ACTIVE - - ON -
INACTIVE - - OFF -
Example of a custom overlay for a
touch panel (TS04 sold seperately).

Digital Audio Input / Outputs
Connect an optical cable from the audio source to the Digital Audio Input of the
1821. An optical cable can be routed from the Digital Audio Bus connector to an
additional 1821 or other device. Connect an optical cable from each of the Digital
Audio Outputs to each sound bar or AVR.
12V DC Power
Connect 12V power adapter to Power Input. The Power Bus port may be
connected to the 1803, or other device sharing the power adapter provided the
power supply is adequate.
Installation
• Attach the 1821 to a at surface with the screws provided.
• Connect push-buttons, if used.
• Connect RS-485 cable from the 1821 to touch panel, if used.
• Connect RS-232 cable from the 1821 to the control device if applicable.
• Connect a digital audio source to the 1821.
• Connect digital audio output cables from the 1821 to product inputs.
• Connect power adapter to AC power, then to the 1821 power port.
752-743
Rev. 20180731
2048 Mercer Road, Lexington, KY 40511-1071 USA
800-322-8346 • 859-233-4599 • Fax: [phone]
[e-mail] • www.audioauthority.com
Example
Demo four sound bars
with push-buttons. The
RS-485 communication
between the media player
and the 1821 allows a
specic audio track to
play for each product.
+
VOLUME 1
2
3
4
PSB 1
PSB 2
PSB 3
PSB 4
1803 1821
RS-485
–
RJ9 CABLE
CAT5/6 CABLE
OPTICAL CABLE
LEGEND