Radio Design Labs ST-SX4 4-Channel Audio Switcher

Product Description

The ST‑SX4 accepts up to four unbalanced audio sources. Any of these sources may be selected to feed the output, or all sources may be switched off. The output from the ST‑SX4 is unbalanced. Control of the module is accomplished through a single input terminal. Connection of a specified resistance between the CTRL input and ground causes the desired input to be switched on. The necessary external resistors are supplied with the ST‑SX4. The ST‑SX4 may be remote controlled using the RC4‑ST remote control.

Power supply is required.

Features

• Select 1 of 4 Unbalanced Audio Sources
• Audio Selection from Remote Location
• Remote Switching from Single Control Pair
• All Solid‑State Audio Switching
• Slave Capability for Stereo Switching

Specifications

AUDIO

• Input and Output Level: ‑10 dBV
• Gain: Unity
• Headroom: 23 dB
• THD+N: < 0.1% Typ. 0.05%
• Frequency Response: 15 Hz to 40 kHz (+/‑ 0.5 dB)
• Input Impedance: 100 kΩ, unbalanced
• Output Impedance: < 50 Ω, unbalanced
• Crosstalk: Below noise floor
• Off‑Channel Attenuation:
  • > 85 dB @ 1 kHz
  • > 80 dB @ 10 kHz
  • > 75 dB @ 20 kHz
• Residual Noise: < ‑70 dB (referred to ‑10 dBV)

CONTROL

• Control Input Resistance: 10 kΩ (pullup to +15 Vdc)
• Control Input: Single terminal to be connected to ground terminal to select desired channel.
• Input Selected | Resistance Value
  • None | 0 Ω (short to GND)
  • 1 | 2.7 kΩ
  • 2 | 6.8 kΩ
  • 3 | 22 kΩ
  • 4 | None
• Power Requirement: GROUND‑REFERENCED, 24 to 33 Vdc @ 40 mA
• Ambient Operating Environment: 0° C to 55° C

NEWADDS08/23/10

For more information on this product, please visit the Radio Design Labs website.

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