RDL TX-AT1 Installation Guide

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Model TX-AT1

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SERIES

Audio Isolation Transformer

ANYWHERE YOU NEED...

• Studio Quality Audio Transformer

• Bifilar Winding, Nickel Alloy Core

• Protection for Inputs and Outputs

• Barrier Block Transformer Connections

• Galvanic Isolation

• 1:1 Transformer Coupling

• Balanced or Unbal Input and Output

• Transformer to Drive 600 Ohm Line

• Convenience of RDL TXs

You Need The TX-AT1!

The TX-AT1 is part of the group of versatile Max-TX series products from Radio Design Labs. Max-TX
modules are the large format members of the RDL TX family, featuring the superior engineering and
components common to RDL products. The durable adhesives provided with the TX-AT1 permit
permanent or removable mounting. The TX-AT1 may be rack or surface mounted with optional TX series
accessories.

APPLICATION: The TX-AT1 is the ideal choice in many applications requiring studio quality transformer
coupling between balanced or unbalanced audio equipment and a balanced or unbalanced line.

The TX-AT1 is a single-channel (mono) module featuring barrier block connections for the input and
output. A studio-quality audio transformer couples the audio input to the audio output. A common ground
terminal is connected to the TX-AT1 metal support structure.

A 1:1 audio transformer provides galvanic isolation. The audio transformer has 600 Ohm primary and
secondary bifilar windings, though is optimized to be driven from a low-impedance source into a bridging
load. The primary and/or secondary may be wired unbalanced, providing conversion between balanced
and unbalanced audio lines. The TX-AT1 delivers the wideband audio, ultra-low distortion, audio clarity
and headroom common to studio equipment in a module suited to both studio and general-purpose audio
installations.

The TX-AT1’s compact size permits mounting in a variety of spaces and in various locations in equipment
racks. The TX-AT1 may be mounted where needed, to rack sides or in an equipment rack (either the front
or rear rack rails) using a variety of available RDL mounting options. Use the TX-AT1 individually, or
combine it with other RDL products as part of a complete audio/video system.

RDL • 659 N. 6th St. • Prescott, AZ., USA 86301 • [phone] • FAX [phone] • www.rdlnet.com

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SERIES

Model TX-AT1
Audio Isolation Transformer

TRANSFORMER ISOLATION

BALANCED SOURCE AND LOADUNBALANCED SOURCE UNBALANCED LOAD

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.

STUDIO QUALITY AUDIO ISOLATION

INPUT

+

-

INPUT FROM

UNBALANCED EQUIPMENT

STUDIO QUALITY AUDIO ISOLATION 1 1 ITY AUDIO ISOLATION 1 1

INPUT

+

-

INPUT FROM OUTPUT TO

BALANCED EQUIPMENT

OUTPUT

BALANCED EQUIPMENT

TYPICAL PERFORMANCE

Input Connector: Barrier block
Input Level: +4 dBu; +22 dBu maximum
Output Connector: Barrier block
Output Level: +4 dBu (less insertion loss)
Impedance Ratio: 600:600
Turns Ratio: 1:1
Core: Nickel alloy
Frequency Response: 20 Hz to 20 kHz (+/- 0.1 dB)
THD: <0.035% (50 Hz to 20 kHz, +4 dBu input)

0.001% (Typ. 1 kHz, +4 dBu input)

0.09% (Typ. 20 Hz, +4 dBu input)
Insertion Loss: 0.25 dB (20 Ohm source; 10 kΩ load)
2 dB (20 Ohm source; 600 Ω load)
CMRR: >85 dB (balanced input, 50 to 60 Hz)
Power Requirement: Passive

Overall Dimensions:
Height: 1.90 in. 4.83 cm
Width: 1.63 in. 4.14 cm
Length: 3.00 in. 7.62 cm

EMC:

OUTPUT

OUTPUT TO

UNBALANCED EQUIPMENT

Radio Design Labs Technical Support Centers

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

891-7030A

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