Overview
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.
Features:
- 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
Specifications
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.
Headroom:
> 18 dB (above +4 dBu)
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:
Shipping Weight:
0.2 lbs.
RDL Three-Year Limited Warranty
Installation of these products by the Purchaser shall constitute Purchaser’s acknowledgement and acceptance of the terms and
conditions for sale and of this warranty, and shall constitute the Purchaser’s determination of the suitability of this product for the
Purchaser’s intended application. Radio Design Labs, Inc., also referred to as RDL®, warrants to the Purchaser that products
manufactured by RDL are free from defects in material and workmanship. This warranty applies to the period of three years from the date
of shipment, except for component parts or products purchased from other sources and supplied by RDL. Such component parts or
products bear only the warranty of the manufacturer thereof in effect at the time of shipment to the Purchaser. RDL will, without charge,
and after written notice has been received and acknowledged by RDL, repair an RDL product if proved to be defective according to the
usage of the trade, when such equipment is received by RDL at the location it designates with shipment costs prepaid by the Purchaser.
RDL shall not be liable for any expense whether for repairs, replacements, material, service, or otherwise, incurred by the Purchaser or
modifications made by the Purchaser to the product. No equipment shall be deemed defective if it shall fail to operate in a normal or
proper manner due to exposure to excessive moisture in the atmosphere, excessive temperature extremes, improper environmental
cleanliness, or any other environment not consistent with the principles of good engineering practice. In no event shall RDL have any
liability for consequential damage or expense directly or indirectly arising from the use of the products, or any inability to use it either
separately or in combination with other equipment or materials, or from any other cause, whether used in accordance with instructions or
not. This warranty is void if equipment is altered in any way by other than RDL. RDL products are NOT intended for use in life support
appliances, devices, or systems. Use of RDL products in such applications is done solely at the liability of the reseller/installer and/or end
user. RDL reserves the right to change design parameters and specifications at any time without notice. The performance measurements
reflect the products at the time of printing. This warranty is in lieu of all others, either expressed or implied. No representative is authorized
to assume for RDL any other liability in connection with RDL products.
