Precision Audio and AV Interface Products

Radio Design Labs

ST-GLA1 Gated Line Amplifier - Noise Gate

  • Gated Line-level Preamplifier
  • Self-Gating to Suppress Unwanted Noise
  • Fast, Silent Audio Switching
  • Integral Single-ended Noise Reduction
  • Adjustable Gain and Threshold
  • Balanced or Unbalanced Input / Output
  • Open-Collector Logic Output
  • Overview
  • Specifications
  • Related Products
  • Accessories
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  • How to Buy
  • Product Series
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The ST-GLA1 is a self-gated line amplifier designed to be used in a variety of situations where it is desired to produce an automatically switched line-level signal with integral noise reduction. This module may be used in conjunction with other RDL® modules to configure automatic mixing systems or may be used alone as a noise gate. The open-collector slave output may be used to trigger other equipment or RDL modules. The versatility of ST-GLA1 applications range from complete automatic mixing system design to the addition of automatic gating to the inputs of conventional mixers or amplifiers to suppress accumulated or induced system noise.

The input and output may be wired balanced or unbalanced. Two LED indicators are provided for adjustment.

Applications

Input:
10 kΩ balanced or unbalanced, bridging
Input Level:
-15 dBV to +4 dBu
ON Gain:
Adjustable to produce +4 dBu output for rated input signal range
Audio Outputs (1):
+4 dBu nominal, 150 Ω balanced, terminal block
Headroom:
> 16 dB (above +4 dBu)
THD+N:
< 0.2%
Frequency Response:
10 Hz to 30 kHz (± 0.25 dB)
Residual Noise:
< -95 dB (below +4 dBu muted)
Output:
150 Ω; (+4 dBu Balanced, -10 dBV unbalanced)
Switching Time:
30 ms
Off Delay:
2 seconds nominal (may be extended using external capacitor)
Control Output:
Open-collector @ 50 mA
Muting Attenuation:
> 60 dB (referred to input signal level)
Muting Threshold:
−16 dB to −35 dB (adjustable, referred to +4 dBu)
Detector Bandwidth:
20 Hz to 5 kHz
Ambient Operating Environment:
0° C to 55° C
Power Requirement:
GROUND-REFERENCED, 24 Vdc @ 75 mA
Package Type:
Cardboard Box
Package Dimensions:
2 x 2 x 4 in.
Shipping Weight:
0.2 lbs.
WEEE weight:
0.145 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
Format
High Res Images:
Format
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-GLA1 ST-GLA1