FP-ALC1 RADIO DESIGN LABS, FP-ALC1 Datasheet

FP-ALC1

Manufacturer Part Number

FP-ALC1

Description

RDL AUTOMATIC LEVEL CONTROL, POWER REQUIREMENTS: 24 VDC, 80 MA, IMPEDANCE: 10 KOHM, TERMINAL TYPE: SCREW, FEATURES: IT MAINTAINS A CONSISTENT DBU OUTPUT FOR INPUT SIGNAL VARIATIONS AS GREAT AS 25 DB

Manufacturer

RADIO DESIGN LABS

Datasheet

1.FP-ALC1.pdf (2 pages)

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FLAT-PAK

Model FP-ALC1

Automatic Level Control

ANYWHERE YOU NEED...

•

You Need The FP-ALC1!

The FP-ALC1 is part of the group of versatile FLAT-PAK products from Radio Design Labs. The unique FLAT-PAK case can

be directly screwed or bolted to cabinets or shelves. Optionally available rack-mounting accessories permit single or multiple

FLAT-PAK module mounting. All FLAT-PAK modules are supplied with a power interconnect cable for daisy-chaining

multiple modules from a single power supply.

APPLICATION: The FP-ALC1 is the ideal choice in many applications where consistent audio levels are needed from

professional sources with varying audio output levels. Power connections are made using either the full-size barrier block

terminals or a dc power jack located in one end panel. A second dc power jack is provided on the other end panel for

connecting additional FLAT-PAK modules.

The FP-ALC1 is a single channel (mono) module featuring detachable terminal block input and output. A single user

adjustment makes installation simple and efficient. The gain adjustment is set as high as possible with the loudest source

without the INPUT OVERLOAD indicator flashing. No further adjustments are needed. Sound systems fed from variable

audio source levels, such as multiple CD changers, satellite receivers or paging sources benefit from consistent levels.

The automatic level control circuitry in the FP-ALC1 maintains a consistent +4 dBu output for input signal variations as great

as 25-dB. Yet the operation of the module is nearly transparent to the listener for a wide variety of source material from rock

to classical. The level pumping effect frequently associated with automatic gain and compression devices is minimized in the

FP-ALC1 by controlling mid and high band audio separately from the bass frequencies. The automatic gain circuitry and

compression attack release times adjust according to the program material to further reduce any audible effects of the

module. The level seeking effect also associated with various automatic level products is avoided in the FP-ALC1. When

audio levels fall and remain below a level appropriate to that source, the module stops increasing the gain. As audio levels

fade out, the module tracks the level for a natural sound. These features combine to produce nearly inaudible adjustment yet

consistent levels without the listener fatigue associated heavily compressed music dynamics.

Common FP-ALC1 applications include paging outputs from telephone systems, music-on-hold feeds for telephone systems,

background or foreground amplifier inputs in sound systems, voice feeds in communications/intercom systems. When used

as a general level control in a paging system, the installer must use care in separating microphones from paging speakers to

avert potential feedback.

The FP-ALC1’s low profile and compact size permit mounting in confined spaces and in various locations in equipment

racks.

accessibility to the connectors. The economical cost can provide assurance of correct signal levels in nearly any stereo audio

system. The FP-ALC1 may be mounted where needed, to rack sides or in an equipment rack (either the front or rear rack

rails) using the RDL FP-RRA. Use the FP-ALC1 individually, or combine it with other RDL products as part of a complete

audio/video system.

Consistent Levels from Variable Sources

Split-Band AGC for Audio Transparency

Self-adjusting Attack and Release Times

AGC with Simple Single Control Setup

Level Control Range >20 dB

Gated Control to Avoid Level “Seeking”

Convenience of RDL FLAT-PAKs

The location of the input/output jacks permits high density mounting against flat surfaces while maintaining

RDL

•

™

659 N. 6

SERIES

St.

•

Prescott, AZ., USA 86301

•

(928) 443-9391

•

FAX (928) 443-9392

•

www.rdlnet.com

Related parts for FP-ALC1

FP-ALC1 Summary of contents

Page 1

... The economical cost can provide assurance of correct signal levels in nearly any stereo audio system. The FP-ALC1 may be mounted where needed, to rack sides equipment rack (either the front or rear rack rails) using the RDL FP-RRA. Use the FP-ALC1 individually, or combine it with other RDL products as part of a complete audio/video system. • ...

Page 2

... FLAT-PAK ™ SERIES Model FP-ALC1 Automatic Level Control GAIN OR 24 VDC POWER SOURCE INPUT INPUT OR OUTPUT MAY BE WIRED BALANCED OR UNBALANCED OUTPUT BALANCED TYPICAL PERFORMANCE Input: Input Level: Output: Output Level: Automatic Level Range: Gate Threshold: Frequency Response (excluding AGC): THD+N (excluding AGC): ...

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