ATI UADC-1 User Manual

Audio Technologies Inc.  856-719-9900  [e-mail]  www.

audio.com

Product Description

The ATI UADC-1 Utility Analog-Digital Converter / Switch provides professional quality 24-bit A-to-D
conversion, along with AES audio path insertion and interruption functions. The UADC-1 may be used as a
standalone high quality A/D converter or to insert stereo analog inputs into an AES stream via remote control,
making it a perfect companion for analog EAS encoders/decoders.

The UADC-1 is equipped for failsafe operation with relay bypass in case power is lost. The A/D converter is
shipped to provide broadcast standard 44.1 kHz sample rates, with 32 kHz or 48 kHz sampling selectable via
internal jumpers. XLR analog audio inputs are balanced when shipped from the factory, but may be switched
to unbalanced, single ended inputs via internal jumpers. (See INSTALLATION Section for internal jumper
settings.)

The front panel includes left and right analog input trimmers, Audio Present and Clipping LEDs for each
analog input, and status LEDs to indicate Remote Active, Analog or Digital Input Selected and Power.

The rear panel includes XLR connectors for balanced left and right analog audio inputs, AES input and AES
output. 3-pin connectors are provided for Unbalanced analog stereo input and remote control inputs. Power is
supplied via a 110 VAC outboard power supply (included), which supplies 24 VDC to the unit.

Installation

Please examine your UADC-1 Utility Analog-Digital Converter / Switch carefully for any damage that may have
occurred during shipping. If damage is noted, please notify the shipper immediately and retain the packaging
for inspection. The package contains the UADC-1 unit, one 24 VDC / 600 mA power supply and this manual.
Please read this manual thoroughly before you install and operate the unit. Do not use this product in any
application where a life threatening condition could result due to its failure.

Use care when installing the UADC-1 in high RF environments. Shielded cable is suggested for all audio
connections. All shields should be tied to the “G” or ground connector pins. It is recommended that all cables
connected to the UADC-1 be looped through ferrite cores to suppress RF. Power line surge protection with RF
filtering is also suggested for the external power supply.

To gain access to the UADC-1 unit’s internal configuration jumpers, disconnect power and remove the six
Philips screws that secure the cover. When configuration is completed, reinstall the cover with the six screws
and re-connect the power.

The ATI UADC-1 Utility Analog-Digital Converter / Switch can be rack mounted using the optional 21075-501
19” Rack Mount Shelf Assembly and 21098-501 ½ RU Filler Panel.

UADC-1

Utility Analog-Digital Converter / Switch

Installation and Set-up Manual

Audio Technologies Inc.  856-719-9900  [e-mail]  www.

audio.com

FUNCTIONAL BLOCK DIAGRAM:

INTERNAL CONFIGURATION JUMPERS:

Refer to the following table to change the XLR analog inputs from balanced to unbalanced, and to change the
default 44.1kHz sampling rate to either 32kHz or 48kHz:

FUNCTION

JUMPER SETTING

COMMENTS

XLR Input
Termination

Jumper JM1 grounds the Left XLR inverting input. Jumper JM2 grounds the
right XLR inverting input.

Factory Default:
JM1 and JM2 open

32 kHz Sample
Rate

Jumpers JM3, JM4 and JM5 should be in the 32 position. Jumpers JM6 and
JM7 should be in the 32/48 position.

44.1 kHz Sample
Rate

Jumpers JM3, JM4 and JM5 should be in the 44/48 position. Jumpers JM6
and JM7 should be in the 44 position.

Factory Default
Setting

48 kHz Sample
Rate

Jumpers JM3, JM4 and JM5 should be in the 44/48 position. Jumpers JM6
and JM7 should be in the 32/48 position.

REAR PANEL CONNECTIONS:

Refer to the following table when making rear panel connections to your UADC-1:

AUDIO CONNECTION

DESCRIPTION & COMMENTS

Left & Right XLR Analog Inputs

XLR connectors are Hi-Z, active balanced as supplied from
factory, but can be unbalanced with internal jumper setting
(see above).

Un-Balanced Stereo Analog Input

Via Euroblock connector; connect shield to G terminal.

Connect your source equipment to the appropriate left and right analog inputs. For monaural sources, tie the left and right
inputs together. Be sure to observe correct phasing.

AES XLR Input

For main AES Source input. When used as an EAS insert
switcher, this would normally be the feed from your air chain.

AES XLR Output

This output will provide either the AES audio input or the A-to­D converted signal from the left and right analog inputs. The
selected input is indicated on the front panel.

Remote Control A

Remote Control B

AES

Output

AES Digital

Audio

Source

Analog

Audio

Source

ADC

+5VDC

+5 to 24VDC

A1

A2

A3

NC

+5VDC

Opto

B1

B2

B3