Lexicon LR-4 Owner's Manual

LR4 LARC Framelink

User Guide

LR4 Front Panel

MACH 1-4 LEDs

Indicate which machine is currently
selected for LARC control.

Rear Panel

AC Power

Standard 3-pin IEC power connector.
100-115/230V, 50-60Hz internal
switches set voltage.

LARC

DE9 connector for interface with
LARC (Lexicon Alphanumeric
Remote Control).

Unpacking and Inspection

After unpacking the LR4, save all packing materials in case
you ever need to ship the unit. Thoroughly inspect the LR4
and packing materials for signs of damage. Report any
shipment damage to the carrier at once; report equipment

malfunction to your dealer.

Power

Provides front panel control of
power on/off. LED lights when
power is on.

MACH 1-4

DE9 connectors for interface to LARC ports
of Lexicon 224XL, 480L or 300L.

Operation

The LR4 Framelink allows a single LARC to communicate with
as many as four LARC compatible Lexicon processors
(224XL, 300L or 480L). Each mainframe can be individually
selected via the LARC and, once selected, operation is
transparent — exactly as though the LARC were directly
connected to that mainframe.

Mounting

The LR4 uses one EIA-standard rack space for mounting in
a standard 19 inch (483 mm) rack.

The maximum ambient operating temperature is 104°F
(40°C). Provide adequate ventilation if the LR4 is mounted in
a closed rack with heat-producing equipment such as power
amplifiers.

Power Requirements

The LR4 is factory configured for 115 or 230V operation, and
is equipped with a 3-pin IEC power connector and detachable
cord.

Connections

Connection to the LARC should be made via the flexible 50 ft.
cable supplied with the LARC. Connection to other Lexicon
devices (224XL, 480L and 300L) should be made using a
10 ft Framelink cable, Lexicon Part No. 680-04734.

LR4 power up behavior and default machine selection varies
slightly depending on whether machines are connected and
running when the LR4 is powered on, or are connected while
the LR4 is running.

If machines are connected and running when the LR4 is
powered on, the LR4 will go through a brief set of internal
diagnostics tests, then begin successively polling each MACH
port to verify connections. After identifying the machine con­nected to each port, the LR4 will return to the lowest numbered
port with a connected device and activate LARC control. For
example, LARC control will default to MACH1 if a device is
connected there. If devices are connected only to MACH 3
and 4, LARC control will default to MACH 3.

If the LR4 is already running when connected machines are
powered on, the LR4 will recognize the first machine to
complete its boot cycle.