Precision Audio and AV Interface Products

Radio Design Labs

ST-RX2 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
  • Overview
  • Specifications
  • Related Products
  • Accessories
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  • How to Buy
  • Product Series
  • Dimensions

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 D-RC2ST or the D-RT2 remote controls.

Applications

Input:
20 kΩ balanced, +4 dBu nominal
Audio Outputs (2):
+4 dBu nominal, 150 Ω balanced, terminal block
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 1 kHz
Indicators (2):
LED showing active output (left LED=NORMAL; right LED=SELECT)
Ambient Operating Environment:
0° C to 55° C
Power Requirement:
GROUND-REFERENCED, 24 Vdc @ 40 mA
Package Type:
Cardboard Box
Package Dimensions:
2 x 2 x 4 in.
Shipping Weight:
0.2 lbs.
WEEE weight:
0.15 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
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High Res Images:
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Declaration of Conformity:
Format
PDF
A&E Specifications:
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STICK-ON SERIES

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ST-RX2 ST-RX2