LDD-1 AC-3/RF Demodulator User Guide
Unpacking and Inspection Save all packing materials in case you ever need to ship the unit. Thoroughly inspect the unit and packing materials for signs of damage. Report any shipment damage to the carrier at once; report equipment malfunction to your dealer. Precautions Save these instructions for later use. Follow all instructions and warnings marked on the unit. Always use with the correct line voltage. Refer to the manufacturer's operating instructions for power requirements.
LDD-1 AC-3/RF Demodulator User Guide Congratulations on your purchase of the Lexicon LDD-1. The LDD-1 is designed to interface between a laser disc player (with an AC-3/RF output), and any Dolby Digital decoder which accepts a standard AC-3 signal (like our DC-1). Because “AC-3 ready” laser disc players use a separate Radio Frequency (RF) modulated output to carry the Dolby Digital information, special considerations must be made.
Front Panel NOTE: When power is off, the LDD-1 automatically outputs the COAXial digital input. POWER This LED will light whenever power to the unit is supplied and enabled. LOCK This LED will light whenever the unit senses an AC-3/RF signal. When no such signal is present, the LED will remain off, and the INPUT SELECT LED will light. 2 LD OPTIMIZATION 3-position switch which minimizes signal errors, providing optimal timing for specific brands of laser disc players.
Rear Panel Connections between the LDD-1 and associated equipment should be made with all units UNPLUGGED! RF IN Connect this input to the laserdisc player’s RF/AC-3 output with a 75Ω coaxial cable. Keep this cable as short as possible to minimize RF interference. POWER Connect the AC adapter here. Use only the supplied Lexicon MSA AC adapter. INPUT Connect a 5-pin DIN cord (not supplied) from this input to the DC-1 PWR CTL Output. This allows the LDD-1 to power on and off with the DC-1.
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The LDD-1 chassis is barely four inches deep to allow it to be positioned adjacent to an AC-3-capable player’s RF output. This minimizes the required RF-signal cable length to reduce any RF interference. As the unit uses automated switching, and draws very little power, you can literally set it and forget it. Setup To set up the LDD-1: • Connect a 75Ω coaxial cable between the LDD-1 rear panel RF (AC-3) input and the laser disc player's RF/AC-3 output.
Specifications Inputs Outputs Optimization Controls and Indicators Connectors General 2: 1AC-3/RF via COAX; 2 Digital (1 COAX; 1 Optical) One (1) Digital via COAX 3-position toggle switch, decoder pulse settings LEDs indicate operational status Toggle switches for: LD Optimization: High, Low, Normal; Input Select: Optical, COAX Inputs: 4: 2 RCA (COAX); 1 TOSLINK (Optical); 1 5-pin DIN (PWR CTL) Outputs: 2: 1 RCA (COAX); 1 5-pin DIN (PWR CTL Thru) Power connector: 2.5mm, 9VAC, 1A Dimensions: 17.0"X x 1.
