RDL FP-BUC2 Data Sheet

FLAT-PAK

™

SERIES

Model FP-BUC2
Balanced to Unbalanced
Converter

ANYWHERE YOU NEED...

• Stereo Balanced to Unbalanced

Audio Conversion

• Connectorized Audio Converter

• Output Level Trim

• Low Noise and Distortion

• Cabinet, Shelf or Rack Mounting

• Convenience of RDL FLAT-PAKs

You Need The FP- BUC2!

The FP-BUC2 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 rack­mounting 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-BUC2 is the ideal choice for connectorized conversion from balanced to
unbalanced audio. This module features two identical active (transformerless) channels. Gold contact
XLR jacks are utilized for the balanced input channels. Each output is unbalanced, connected through a
gold-plated phono jack. A level trim potentiometer is provided for each channel. 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 normal level setting is indicated for the trimming potentiometer. This setting produces a -10 dBV
unbalanced output for a +4 dBu balanced input. The gain is adjustable +/-6 dB from the normal gain.
A -10 dBV output signal is possible from input signals ranging from –2 dBu to +10 dBu.

The FP-BUC2 circuitry features low noise and distortion, excellent headroom and crosstalk performance
and the superior audio clarity for which RDL products are known. The FP-BUC2’s low profile and
compact size permit mounting in confined spaces and in various locations in equipment racks. The
location of the input/output jacks permits high-density mounting against flat surfaces while maintaining
accessibility to the connectors. Installations requiring multiple connectorized audio converters are ideally
designed using FP-BUC2s affixed to rack sides, or by mounting them to either the front or rear rack rails
using the RDL FP-RRA.

Wherever convenient, economical, high performance, connectorized two-channel audio format
conversion is required, the FP-BUC2 is the ideal choice. Use the FP-BUC2 individually, or combine it with
other RDL RACK-UP®, STICK-ON®, TX™, or FLAT-PAK series products as part of a complete
audio/video system.

RDL •• P.O. Box 1286 •• Carpinteria, CA., USA 93014 •• [phone] •• FAX [phone] •• http://www.rdlnet.com

™

FLAT-PAK

SERIES

Model FP-BUC2
Balanced to Unbalanced Converter

2A MAX

BUS

OUT 1

GAIN OUT 2 GAIN

POWER

OR

24 VDC

POWER

SOURCE

24 VDC

1A MAX

INPUT

INPUT 1

Unbalanced Audio

Outputs Feeding Other

Unbalanced Audio

Equipment

INPUT 2

FP-BUC2

CURRENT

2A MAX

PWR BUS

Installation/Operation

EN55103-1 E1-E5; EN55103-2 E1-E4

Typical Performance reflects product at publication time
exclusive of EMC data, if any, supplied with product.
Specifications are subject to change without notice.

Gain Shown Set
for -10 dBV Output
from a +4 dBu
Input

50 mA

Power to Additional

Flat-Pak Modules, Total

Current Not to Exceed 2 A

or Available Supply Current

Balanced Audio
Source Feeding
FP-BUC2 Inputs

TYPICAL PERFORMANCE

Amps per FP-BUC2: 2 identical circuits (stereo or dual mono operation)
Gain: +/- 6 dB adjustable (relative to –10 dBV output for +4 dBu input);

(separate controls for each channel)
Input level: –2 dBu to +10 dBu (for -10 dBV output)
Input impedance: 20 kΩ
Input configuration: Balanced bridging
Output Level: -10 dBV
Output impedance: 75 Ω (drives 600 Ω or 10 kΩ unbalanced lines)
Output configuration: Unbalanced
Frequency Response: 10 Hz to 40 kHz (+/ - 0.1 dB)
THD+N: < 0.005% (10 Hz to 40 kHz)
IMD: < 0.005%
Headroom: > 18 dB (at rated output level of -10 dBV)
Noise: < -90 dB (referred to -10 dBV, 20 Hz to 20 kHz)
Typ. –95 dB (rel. –10 dBV, “A-Weighted”)
CMRR: >50 dB (20 Hz to 5 kHz)
Crosstalk: Better than -90 dB (20 Hz to 20 kHz)
Power Requirement: 24 Vdc @ 50 mA, Ground-referenced
Overall Dimensions: Height: 1.29 in. 3.28 cm

Width: 3.25 in. 8.26 cm
Length: 4.07 in. 10.34 cm

891-2055B

Europe [NH Amsterdam] (++31) 20-6238 983; Fax: (++31) 20-6225-287

Radio Design Labs Technical Support Centers

U.S.A. [phone], [phone]; Fax: [phone]