Lexicon PCM 80 - PCM 80 Installation Notes

Lexicon
PCM 80 User Guide
1-4
Installation Notes
Mounting
The PCM 80 is equipped with a 3-pin IEC power connector and detachable cord.
The PCM 80 will operate with power sources from 100 to 240 volts AC, 50-60Hz.
Power switching to actual line voltage is automatic.
Power Requirements
Audio Connections
Analog Audio
For best performance, maintain balanced connections, and use high-quality,
low-capacitance, twisted-shielded pair cable.
When connecting to single-ended, unbalanced devices, connect the low side to
signal ground at the unbalanced piece of equipment. Output level does not
change when connected to an unbalanced input.
Mono Applications
Use a Y-connector inserted at the analog inputs and outputs to have the signal
summed to mono.
NOTE
Be careful to keep input and output to all channels wired consistently. Out-of-
phase wiring can produce audible effects.
Digital Audio
S/PDIF (CP-340 Type II) Consumer Digital Audio I/O. 75Ω coaxial cable suited
for digital audio or video signals is required. Audio grade cable is not suitable.
Footswitch/Foot Controller
One 1/4 inch T/R/S phone jack is provided for 2 momentary footswitches.
Another 1/4 inch T/R/S phone jack is provided for a footpedal (minimum 100Ω
to maximum 10k impedance). Normally open or normally closed momentary
switches are suitable. At power on, the PCM 80 assumes the switch is off. Use
shielded, twisted-pair cable with shield connected to sleeve. See diagram on
previous page.
MIDI
5-pin DIN connectors are provided for MIDI IN, THRU and OUT. Use standard
5-pin DIN MIDI cable assemblies, available from your local dealer.
The PCM 80 uses one EIA-standard rack space, and can be mounted on any
level surface or in a standard 19 inch (483 mm) rack. If the PCM 80 is mounted
in a rack or road case, support the rear of the chassis to prevent possible
damage from mechanical shock and vibration.
The maximum ambient operating temperature is 104°F (40°C). Provide ade-
quate ventilation if the PCM 80 is mounted in a closed rack with heat-producing
equipment such as power amplifiers.
Control Connections