Precision Audio and AV Interface Products

Radio Design Labs

ST-SSR1 Line-Level Audio Switch - 2x1

  • Switch Line Level Sources
  • Select Between Two Balanced Lines
  • Silent Audio Switching
  • Switching Without Hard Relay Contacts
  • Fast Switching for Audio Muting
  • Selection by Open-Collector Logic
  • Overview
  • Specifications
  • Related Products
  • Accessories
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  • How to Buy
  • Product Series
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The ST-SSR1 was designed for absolute silent switching of audio signals. It supports two balanced line-level inputs and one balanced output. Each can be used unbalanced as well. The ST-SSR1 is perfect for switching between two input signals or as a silent On/Off switch for a single channel. Performance is in keeping with the technical standards for which RDL® has become known. The user can program the module for either fast or soft switching.

The SELECT input feeds the OUTPUT when the TRIG terminal is grounded, otherwise the OUTPUT is fed by the NORMAL input.

The control current required at the TRIG terminal is so minimal (< 0.5 mA) that the ST-SSR1 can be controlled from nearly any source from switches to logic circuits.

The ST-SSR1 may be controlled using the RDL D-RC2ST or the D-RT2 remote controls.

Applications

Inputs (2):
20 kΩ balanced, +4 dBu nominal
Audio Output:
+4 dBu nominal, 150 Ω balanced, terminal block
Switching Time:
Fast    /    Soft
Time required for NORMAL input to turn off:
10 us   /    5 ms
Time required for NORMAL input to turn on:
15 us   /    70 ms
Time required for SELECT input to turn off:
15 us   /    10 ms
Time required for SELECT input to turn on:
20 us   /    35 ms
Control Signal:
TRIG terminal must be externally
pulled to ground
Control Current:
0.5 mA
THD+N:
< 0.05%
Frequency Response:
15 Hz to 20 kHz (± 0.5 dB, bridging load)
30 Hz to 20 kHz (± 0.5 dB, 600 Ω load)
Noise (below +4 dBu):
< -80 dB (85 dB typical)
Headroom (above +4 dBu):
> 18 dB
CMRR
> 45 dB (100 Hz, either port)
ON Gain:
Unity (600 Ω balanced input/output)
OFF Attenuation:
> 80 dB (10 Hz to 20 kHz, either input)
Indicators (2):
LED showing active input (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:
0.198 lbs.
WEEE weight:
0.145 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

STICK-ONs are the original application-specific modules for the A/V, recording and broadcast industries. Module functions include signal detection, switching, pre-amplification, format conversion, line driving, power amplification, mixing, distribution, gain control, equalization, routing and more. Each STICK-ON is an ultra-compact module engineered to provide higher performance and longer life than other industry products. STICK-ON modules are solid encapsulated hybrid circuits in durable industrial black plastic enclosures (1.55", 3.94 cm x 3", 7.62 cm x 0.65", 1.65 cm) with clear bold white lettering for the terminal block connections, recessed trimming controls and switches.

Since RDL first originated application-specific modules, STICK-ONs have led the industry in economical, high-performance and cost-effective long life solutions in system designs. Multiple STICK-ON modules can be interconnected to form all or part of an A/V system. A single STICK-ON module may be mounted right where its function is needed, often to add an input, output, or gain adjustment to existing equipment. STICK-ON modules allow customizing an A/V system to precisely match users’ needs. Adding STICK-ONs to an existing system can extend system life by adding updated features, resulting in considerable cost savings. A complete range of backboard and rack mounting options is available for systems comprised of multiple STICK-ON modules.

The technology used in STICK-ON modules has been regularly updated over the years to insure industry-leading performance. Functions and features provided by STICK-ONs, since their introduction, are still available today. This continuity in product offering and support makes STICK-ON modules the preferred long-term resource for system design solutions. STICK-ON SERIES modules are designed and manufactured in the U.S.A.

ST-SSR1 ST-SSR1