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SERIES TWISTED PAIR
Model TX-TPS3A
Format-A Three-Pair Sender
• Three -10 dBV Unbalanced or +4 dBu Balanced Inputs
• Phono Jack and Detachable Terminal Block Inputs
• Audio Inputs to Feed Pairs A, B and C
• Utilizes All Three Format-A Pairs
• Powered Locally or Remotely through RJ45 Jack
• Local Power Feeds all Modules Connected to OUTPUT
• Wiring Fault Protection by Automatic Resetting Fuse
• Local Power Input on Terminal Block or dc Power Jack
• Blue LED Indicates Module is Powered
• Studio-Quality Precision Active Balanced Circuitry
The TX-TPS3A is a three-pair audio sending module compatible with RDL Format-A twisted pair products.
It is built in the versatile Max-TX series enclosure. The durable adhesives provided with the TX-TPS3A
permit permanent or removable mounting. The TX-TPS3A may be rack or surface mounted with optional
TX™ series accessories.
APPLICATION: The TX-TPS3A is a three-pair audio sending module compatible with RDL Format-A
twisted pair products. Three line-level sources may be connected to the module, each using either the
-10 dBV unbalanced RCA phono jack or the +4 dBu balanced detachable terminal block. Studio-quality
buffer amplifiers feed the RJ45 OUTPUT at the correct operating level. The TX-TPS3A feeds all three
signal pairs in the twisted pair cable. No other sending modules may be connected on the same cable with
this module. The TX-TPS3A may be powered directly from a 24 Vdc power supply using either the power
jack or the detachable terminal block. Local power connected to the module is also fed to all modules
connected to the OUTPUT RJ45 jack. The TX-TPS3A may be remotely powered through the twisted pair
cable from any other module, signal distributor or RDL power inserter connected to the same twisted pair
cable. Module power is indicated by a front-panel LED.
RDL FORMAT-A features superior audio performance that rivals or exceeds shielded wiring. Design
simplicity, ease of installation, unsurpassed flexibility, automatic fused power, exceptional hum rejection,
low noise, and low distortion provide designers and installers the optimum choice in economical twisted
pair products.
RDL • 659 N. 6th St. • Prescott, AZ., USA 86301 • (928) 443-9391 • FAX (928) 443-9392 • www.rdlnet.com
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SERIES TWISTED PAIR
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.
TX
Model TX-TPS3A
Format-A Three-Pair Sender
STEP 1: Connect an audio source to each of the inputs (+4 dBu balanced terminal block, or -10 dBV input jack).
STEP 2: Connect 24 Vdc to the power input terminals if this module is not being powered through the twisted pair cable from another
module, or if this module is located an excessive distance from the next powered module on the cable. Note: The front-panel power LED
will be illuminated if this module is powered. If this module is powering other modules through the cable and if there is a wiring short, the
short must be cleared then power must be turned off to this module for 10 seconds to reset the internal protection circuit.
STEP 3: Connect the twisted pair cable(s) and mount the module.
Pair A: Audio +4 dBu
Pair B: Audio +4 dBu
Pair C: Audio +4 dBu
Pair D: Power +24 Vdc
RJ45 conductor colors shown are for 568A standard. The 568B standard may be used if the connectors at both ends of the cable are wired identically.
TYPICAL PERFORMANCE
Inputs (6): 20 kΩ balanced (3); 10 kΩ unbalanced (3)
Input Connection: Terminal Block (Bal.); Phono Jack (Unbal.)
Input Level: +4 dBu Bal.; -10 dBV Unbal.; +22 dBu Max
Format-A Signal Pairs Used (3): A, B, C
Output: RDL TP Format-A
Output Connection: RJ45
Frequency Response: 10 Hz to 50 kHz (+/- 0.1 dB)
THD+N: < 0.005%
Noise below +4 dBu: < 90 dB
Radio Design Labs Technical Support Centers
U.S.A. (800) 933-1780, (928) 778-3554; Fax: (928) 778-3506
891-7060
Europe [NH Amsterdam] (++31) 20-6238 983; Fax: (++31) 20-6225-287
RJ45 Standard wiring
Tab on bottom of connector
Crosstalk: < 85 dB (1 kHz); < 70 dB (20 Hz to 20 kHz)
Headroom above +4 dBu: > 18 dB
CMRR: > 60 dB (50 Hz to 150 Hz)
Indicator: Power In
Power Connections (3): Power Jack; Detachable Terminal Block; RJ45
Power Requirement: 24 Vdc @ 65 mA plus connected loads
Maximum Load Current: 135mA
Dimensions: 3.0" (7.6 cm) W ; 1.6" (4.08 cm) H; 2.09" (5.3 cm) D
(1) + White / Green
(2) – Green
(3) + White / Orange
(4) – Blue
(5) + White / Blue
(6) – Orange
(7) + White / Brown
(8) – Brown
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