Lexicon 300, Owner'S Manual

Page: 27 / 155

2-7
System Overview
Digital
In
Analog
In
XLR
RCA
OPT
48 kHz
44.1 kHz
PLL
Sample Rate
(SR)
SR
A/D
0.0 or +16dB
Rear Panel
Gain Switch
-10 to +10dB
Input Level
Control
Panel, MIDI and Time Code
Program Change
-10 to +10dB
Output Level
Control
Analog
Out
Digital
Out
Effect
Digital
In
DSP
Digital
Out
D/A
SR
SR
XLR
RCA
OPT
Emph
Emph
DSP
System Overview The 300 presents you with an incredible number of choices — all of which can
be made through the front and rear panel. Although you could certainly operate
the 300 by setting each I/O configuration and effect parameter by hand each time
you use it, you probably wouldn't enjoy it — so we've tried to organize the 300
so that its considerable flexibility doesn't become an obstacle. Before digging
into the details of operation presented in this manual, you may find this brief
overview useful.
The block diagram shown below illustrates the basic flow of audio through the
300. Analog and/or digital audio enters on the left. Each is conditioned and
translated as required and, in the case of digital audio, a sample clock is
extracted. The resultant digital audio streams are sent to effect processing, then
converted to appropriate analog and digital outputs (on the right).
As you can see from the figure, the 300 has a rich set of I/O capabilities, with
many choices available to the user, including:
Sample Rate
Analog or Digital Input connector
Digital and Analog Emphasis/De-emphasis
Digital Output format (AES or SPDIF)
Digital Copy (SCMS) and Emphasis bit manipulation
Processor Configuration
The I/O organization is part of the 300's Control Mode. Other items which form
part of the global operaton of the box are: Time Code event list viewing and
editing, MIDI Mapping Tables, Purge functions for User Registers,Copy Tools,
and Bypass button functions.