ATI Audio MCDA112 - Manual (Page 6)

6
MCDA‐112 Manual
CLOCK SOURCE
When set to Internal, the MCDA-112 generates the clock reference and applies it to all outputs. When
set to External, the MCDA-112 accepts an external clock or AES input and applies this reference to all
outputs.
FRONT PANEL LOCK
The FRONT PANEL LOCK button is a feature on all Series 2 products. It is intended to reduce the
possibility of inadvertent changes to front panel settings. When Front Panel Lock is enabled all front
panel buttons are disabled, with the exception of the Front Panel Lock button itself. To enable Front
Panel Lock, press and hold the Front Panel Lock button for three seconds. When the CLOCK SOURCE
lamp stops flashing, the front panel controls are disabled. To re-enable the front panel buttons, press
and hold the Front Panel Lock button for three seconds. When the CLOCK SOURCE lamp stops
flashing, the front panel controls are reactivated.
REAR PANEL
ETHERNET PORT
The Ethernet Port on the rear panel is intended for future use and has no function at this time.
AC MAINS VOLTAGE
All Series 2 models can operate from either 110VAC or 220-240VAC. Voltage selection is set at the
factory via jumpers on the main motherboard near the AC power connector. For 110VAC operation
(factory default, unless unit is ordered for 220-240VAC), jumpers are placed between PAD 1 and PAD
2. For 220-240VAC operation, these jumpers are removed and a new jumper is installed between PAD
2 and PAD 3. Silkscreen legends on the motherboard identify these jumpers.
POWER SUPPLY
Power transformer primary windings are paralleled for 115VAC or wired in series for 230VAC. Internal
jumpers allow field modification if necessary. See below for voltage conversion instructions.
INSTALLATION
LOCATION
To avoid addition of jitter (timing variations) to the output clock signals, which could cause noise and
distortion or loss of synchronization in the recovered audio, avoid locating the MCDA-112 in close
proximity to a high energy, high frequency switching type power supply or a power amplifier that utilizes
a switching supply. If possible, do not power both devices from the same AC power line.