ST-RX2 Audio Routing Switcher - 1x2

Radio Design Labs - Audio Routing Switcher - 1x2

Routing of a Line‑Level Source
Audio Switched to One of Two Destinations
Silent Audio Switching
Balanced or Unbalanced Routing
Switching by Open‑Collector Logic

The ST‑RX2 has a single line‑level audio input and two line‑level audio outputs. In the absence of a control input, the NORMAL module output is fed from the audio input. When the TRIG control terminal is connected to ground, the input audio is fed to the SELECT output and the NORMAL output is switched off. When the TRIG terminal is again disconnected from ground, then the SELECT output is turned off and the NORMAL output is fed from the input. The module contains no relays or other mechanical devices. The control circuits utilize solid‑state switching to route the input signal to one of the balanced output line drivers with off attenuation better than 80 dB at all audio frequencies. Soft switching is used to eliminate clicks or pops.

The control current required at the TRIG terminal is so minimal (< 0.5 mA) that the ST‑RX2 can be controlled from nearly any source from switches to logic circuits.

The ST‑RX2 may be controlled using the RDL RC2‑ST, RT2 or RUC‑4 remote controls.

Typical Performance:

Switching Time:		Fast \| Soft
Time required for NORMAL output to turn off:		10 us \| 5 ms
Time required for NORMAL output to turn on:		15 us \| 70 ms
Time required for SELECT output to turn off:		15 us \| 10 ms
Time required for SELECT output to turn on:		20 us \| 35 ms
Control Signal:		TRIG terminal must be externally connected to ground.
Control Current:		0.5 mA
Headroom:		> 18 dB (above +4 dBu)
THD+N:		< 0.030% (1 kHz)
CMRR:		> 45 dB (100 Hz)
Frequency Response:		15 Hz to 20 kHz (+/‑ 0.5 dB into 10 kΩ bridging input) 30 Hz to 20 kHz (+/‑ 0.5 dB into 600 Ω)
Noise:		< ‑85 dB (below +4 dBu); ‑90 dB (typical)
ON Gain:		Unity (Balanced input and output)
OFF Attenuation:		> 80 dB (Either output); > 95 dB at 1kHz
Indicators (2):		LED showing active output (left LED=NORMAL; right LED=SELECT)
Power Requirement:		GROUND‑REFERENCED, 24 to 33 Vdc @ 40 mA

Data/Installation

Mounting Accessories:

MB-1 Mounting Kit - RU, ST and TX Series	MB-3 Kit to Mount ST, TX Series Modules on FP Panel	MSR-1 Snap Rail Adapter - STICK-ON Series
RC-1U 19" Universal Rack Chassis - RU, ST and TX Series	RU-RA3A 19" Rack Mount for 3 RACK-UP Series Products	SMK-12 STICK-ON Mounting Plate
SR-10 STICK-ON Series 19" Mounting Rack - 10 modules	SR-12A STICK-ON Series 19" Mounting Rack - 12 modules	SR-4 STICK-ON Series Mounting Rack - 7 modules
STR-19A STICK-ON Series 19" Racking System - 12 modules	STR-19B STICK-ON Series 19" Racking System - 10 modules	UC-1 Single Wide Enclosure - RACK-UP Mounts
UC-2 Double Wide Enclosure - RACK-UP Mounts	WDG1 Table Top Chassis for RU, ST and TX Series	DRA-35S STICK-ON DIN Rail Adapter - 1 module
DRA-35S6 STICK-ON DIN Rail Adapter - 6 modules

General Accessories:

DTB
STICK-ON® Series Detachable Terminal Block

AMS
Accessory Mounting System

Related Products:

RC2-ST
2 Channel Remote Control for STICK-ON - Remote selection of audio or video sources

RT2
Remote Control Selector

RUC-4
ULTRASTYLE Universal Remote Control

Copyright © 2008 Radio Design Labs, Inc. RDL, Radio Design Labs, the RDL logo, STICK-ON, RACK-UP and the Rack-Up logo are registered trademarks of Radio Design Labs, Inc. Flat-Pak, RCX, SourceFlex, SupplyFlex, Sure-Lok, TX, ULTRASTYLE, and Specialists in Practical Precision Engineering are trademarks of Radio Design Labs, Inc. All other trademarks are the property of their respective owners. Typical Performance reflects product at publication time exclusive of EMC data, if any, supplied with product. Date last modified: November 20 2008