Lexicon PCM 42 - SECTION ONE INTRODUCTION; 1.0 Description; 1.1 Precautions

1.0 DESCRIPTION
The PCM 42 is a high-performance digital delay
line/ processor that features up to 2.4 seconds of high
quality audio delay, expandable to 4.8 seconds with
optional memory. Delay times are indicated by a highly
accurate numeric display, which provides rapid tracking
of ALL changes in delay time. The PCM 42 includes ver-
satile audio patching and remote control facilities, and a
unique synchronizing clock feature that allows highly
musical usage of the very long delays of which it is
capable. Long repeat loops and layering effects which
were formerly confined to the studio may now be used
easily and reliably on stage.
The 42 provides superior audio performance through
Lexicon’s proprietary method of analog-to-digital
encoding. An increased sampling rate gives wider band-
width without aliasing effects. In addition, a new “‘soft-
knee” limiting circuit eliminates the unpleasant distortion
that most digital circuits generate when overloaded.
The PCM 42’s excellent sonic quality, unique features,
light weight, flexibility and ease of use make it the
perfect choice either on stage or in the studio.
1.1 PRECAUTIONS
Although the PCM 42 is a very well-behaved device,
precautions consistent with good practice for any piece
of audio gear should be observed as a matter of course.
SECTION ONE
INTRODUCTION
Before turning the PCM 42 on or off, it is advisable to
lower the volume on your power amplifier or monitoring
system to avoid undesirable transients.
Never connect power sources or audio power
amplifiers directly into ANY of the PCM 42’s phone
jacks. The PCM 42’s inputs are designed for line level
signals. If a guitar amplifier is used as a signal input,
then a suitable attenuator pad must be used to lower
the level of the feed to the PCM 42.
To prevent fire or shock, never operate the PCM 42 in
the rain or in exposed wet locations.
Please read Section Three UNSTALLATION) of this
manual before operating the PCM 42.
WARNING
ALL SERVICING OF THE PCM 42 SHOULD BE
PERFORMED BY QUALIFIED SERVICE PER-
SONNEL. THERE ARE HAZARDOUS
VOLTAGES LOCATED UNDER BOTH THE
TOP AND BOTTOM COVERS OF THE UNIT.
TO AVOID ELECTRICAL SHOCK, REMOVE
THE POWER CORD BEFORE REMOVING
COVERS. SERVICING PROCEDURES CON-
SISTENT WITH GOOD SAFETY PRACTICE
SHOULD BE USED AT ALL TIMES.