Lexicon PCM 81 - REV 2 - Emphasis Bit; Output Level; Scms; Wordsize

2-9
Basic Operation
PCM 81
0.3 WordSize
The WordSize control allows you to dither the PCM 81 24-bit word
size to match the device receiving digital audio from the PCM 81.
If you are recording to the digital input of a DAT machine, select
16 bits. If you have a digital console with a 24-bit bus, select 24
bits.
If you are using the analog outputs, select 20 bits (the default
setting).
0.4 SCMS
Digital audio signals, in order to comply with copyright standards,
are encoded with control information which can limit the ability to
copy audio data. This control information is generally known as
SCMS (Serial Copy Management System). Under this system, you
can choose to have the audio material processed by the PCM 81
encoded to allow one of three levels of copy restriction. To make
your selection, use ADJUST to select No Copy, One Copy, or Multi
Copy.
0.5 Emphasis Bit
The Emphasis control allows you to explicitly set the emphasis
"flag" in the digital audio, or to pass along the incoming signal
without changing its emphasis coding. (The PCM 81 does not
perform any emphasis or de-emphasis as part of its signal
processing. The AES input/output path will correctly pass either
15/50 or CCITT emphasis.) The choices available with ADJUST are:
Yes, No, and Pass Thru.
0.6 Output Level
This control allows you to select the maximum output level at the
PCM 81's analog outputs. Use ADJUST to select +4 dBu, or –10dBu.
Note:
Exercise care when switching this control, as a 14dB
level change instantly occurs when going from
-10dBu to +4dBu.
ROW 1 SYSTEM
1.0 Edit Mode
The PCM 81 has been designed with a "plug and play" feature
called Go mode. In this mode, the most useful parameters of each
effect are grouped together in a single row which is available
whenever you press Edit.
Each PCM 81 preset has a set of Go mode parameters which we've
selected for you. When shipped, the PCM 81 will power up in Go
mode, with the first preset (P0 0.0) loaded. Press Edit to display
the first available parameter in the Soft Row.
If you want access to the full parameter matrix for any effect,
including the Soft Row parameters, use ADJUST to select Pro
mode. Now, when Edit is pressed, you can select any parameter for
adjustment, and customize any effect with your own Soft Row
assignments. For more information about the Soft Row, see Editing
an Effect later in this chapter.
1.5 1.6
1 1.0 1.1 1.2 1.3 1.4
1.7 1.8
System
Edit Mode Mix Mode Tempo Mode Bypass Mode Pgm Bypass
Mem Protect Auto Load
Patch Update Initialize