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3
ADC-1 Plus Installation and Operation Manual
DESCRIPTION
PRODUCT DESCRIPTION
The ADC-1 Plus provides professional quality analog to 24-bit digital audio conversion. The
ADC-1 Plus is a perfect companion for converting the analog output of equipment (EAS
encoders, etc) to stereo AES. The A/D converter may be configured for sample rates of 44.1 or
48kHz or use an external word clock from 32 to 96kHz. Features: balanced stereo analog inputs
and AES output via XLR connectors. The front panel is equipped with left and right analog
input trimmers, options dip-switch, LED level meters, and power LED indicator. The ADC-1
Plus is powered by a surge protected bi-polar 15 VDC power supply affording superior head-
room and high definition audio. The ADC-1 Plus may be set on a desktop, mounted on a wall
or up to three units may be mounted on the optional RA-1, Rack-Able mounting shelf.
INSTALLATION
Please examine your ADC-1 Plus carefully for any damage that may have been sustained
during shipping. If any is noted, please notify the shipper immediately and retain the pack-
aging for inspection by the shipper. The package contains the ADC-1 Plus and a +/-15 VDC
wall power supply with domestic AC power connector. Manuals may be downloaded from
our web site.
Installation of the ADC-1 Plus in high RF environments should be performed with care.
Shielded cable is suggested for all audio connections. All shields should be tied to the “G”
Ground terminals. The station ground should be connected to the chassis ground screw
labeled “CHS GND.” It is recommended that all cables connected to the ADC-1 Plus be
looped through ferrite cores to suppress RF. Surge protection with RF filtering such as the
Tripp-Lite “ISOBAR 4 or 6” is also suggested for the wall transformer.
L/R ANALOG INPUTS
Hi Z, active balanced. Connect your source equipment to the
left/right input XLR connections. For monaural sources, tie the
left and right inputs together, be sure to observe correct phas-
ing. NOTE: If the source feeding the ADC-1 Plus is unbal-
anced, install a jumper between LT- or RT- pins and GND.
AES OUTPUT
Connect this XLR connector to the AES input on your equipment.
WORD CLOCK INPUT
Balanced word clock input. Accepts all standard digital audio
sample rates from 32 to 96kHz. Must be configured to activate
this input.
FRONT PANEL OPTIONS SWITCH
SW1-1 OFF: 44.1 kHz sample rate (factory default).
ON: 48 kHz sample rate. May be special ordered for 32 kHz.
SW1-2 OFF: External Clock
ON: Internal Clock (factory default).
SW1-3 OFF: External clock range: 30 to 59 kHz.
ON: External clock range: 44.1 to 96 kHz (factory default).
SW1-4 Unused
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product updates and
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