Basic Operation; Front Panel - Locations & Functions; Input Selection - Apogee AD-1000 Operating Manual

AD-1000 Operating Manual
Operation
Locations and Functions: Front Panel Controls
The AD-1000 offers an input section that can receive a wide variety of Analog and Digital inputs ranging from
low microphone levels to the hottest line levels. The controls affecting the audio input selection and level are
located toward the left of the unit and are detailed above. AES, S/PDIF electrical and optical signals can also
be input and reformatted to other digital output types.
Input Selector
The input selector is an eleven position switch providing a wide selection of options, as follows:
Mute
When the analog input selector is switched to MUTE, the outputs of the AD-1000 transmit what is known as
'audio black' in their respective digital formats. This is a signal which corresponds to zero level input. Word
Clock is still available at the 15 pin HD connector on rear panel. The analog to digital converter is turned off
and will not pass audio; the analog and digital sections of the converter are powered down. The second MUTE
position located at the 8 o'clock position is the same in function to MUTE at the twelve o'clock position except
that phantom power is turned off in the 8 o'clock position.
MIC Input 0, 10, 20 ,30 ,40
Rotating the selector clockwise, these five positions select microphone input gain in 10 dB increments. Used in
conjunction with the LEFT and RIGHT input level controls, up to 54 dB of gain is available. (40 dB from the input
selector and an additional 14 dB if the LEFT or RIGHT controls are fully clockwise.) This combination allows the
setting of the coarse gain with the input selector and use the LEFT and RIGHT controls for precise control.
The LEFT and RIGHT rotary controls can be bypassed and the gain controlled by the multi-turn CAL pots if
desired. This is accomplished by changing the DIP switch settings accessed via a slot on top of the AD-1000.
Line Level Input +4, –10
Two CAL positions are available by rotating the INPUT SELECTOR counter-clockwise from twelve o'clock. These
CAL positions correspond to a nominal +4 (Pro) and nominal –10 (Consumer) line level inputs. When either of
these positions are selected, the multi-turn CAL trim pots located to each side of the INPUT selector are
enabled. These multi-turn pots are adjustable by a small straight blade screw driver.
The CAL pots can be bypassed and the gain controlled by the LEFT and RIGHT rotary controls if desired. This
is accomplished by changing the DIP switch settings accessed via a slot on top of the AD-1000. Refer to page
31 for further information.
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