Apogee AD-16 Руководство пользователя - Страница 11
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Congratulations! You have just purchased a powerful and flexible multichannel analog-to-digital converter that
renders an accurate soundstage and pristine audio quality in the tradition of Apogee's award-winning convert-
ers. While the AD-16 is simple in operation, you should take a moment to read over this manual in order to get
acquainted with the AD-16's features and operations.
Designed for the latest hard-disk recording systems, the AD-16 offers 16 channels of Apogee conversion
quality at an exceptionally affordable price, handling 24-bit A/D conversion at sample rates up to 96kHz. The
balanced analog inputs can interface to a wide variety of input levels from –10dBv to +4dBu with additional
adjustments for digital headroom levels. Apogee's SoftLimit analog processing can be selected for either bank
of eight channels as well as the renowned UV22HR word length reduction technology.
The converters sync to internal clocks or to an external Word Clock through the use of Apogee low jitter
clock technology. Digital outputs are ADAT lightpipe as standard and can be configured to output Sonorus
S/MUX protocol for sample-splitting high-resolution signals into optical interfaces. AES/EBU or TDIF outputs
are also available as an option.
POWER
On the left-hand side of the front-panel is the POWER button. Press once to power the unit on and press again
to power off the unit.
SAMPLE RATE/SYNC
To the right of the power button is the Sample Rate/Sync button. This sets the sample rate (sampling frequen-
cy) for the digital and word clock outputs to 44.1, 48, 88.2 or 96kHz referenced to the internal clock, or allows
the unit to be synchronized to an external word clock input. LED indicators to the right of the button indicate
the current setting.
OVER CLR
This button, situated above the Sample Rate/Sync button, clears the sixteen channel over indicators when they
are selected to infinite hold with the rear panel DIP switch.
UV22HR
Selects the digital word length (also referred to as bit rate or resolution) for the digital outputs. Note that the
AD-16 always converts analog to digital at 24-bit resolution. To output a 16-bit or 20-bit signal, in 44.1 or 48kHz
the UV22HR process can be applied by pressing the UV22HR button. This will cycle through the selection of
channels 1-8, channels 9-16, or both, and then back to all channels off. 16 or 20-bit UV22HR is selected by rear
panel DIP switch #1.
In high density modes (88.2 or 96kHz sampling), UV22HR is not necessary. If you attempt to activate it, the
UV22HR LEDs will remain dark and the 88.2 and 96kHz sample rate LEDs will flash.
SOFTLIMIT
The SoftLimit process can be applied by pressing the momentary SoftLimit button. Pressing the button repeat-
edly will cycle through the selection of channels 1-8, channels 9-16, or both, and then back to all channels off.
Channel 1-16 Level LEDs
During normal operation, the brightness of these green audio LEDs varies in proportion to the analog input sig-
nal level, to indicate the presence of audio (i.e., they illuminate brighter for "louder" incoming analog signals)
Apogee AD-16 User's Guide
Introduction
The Front Panel
Page 11