RDL ST-GSP1 Gated Speech Preamplifier - Mic to Line

Description
Warranty Information

Overview

The ST-GSP1 is a gated speech preamplifier designed to be used in a variety of situations where it is desired to produce an automatically switched line-level signal from a microphone. This module may be used in conjunction with other RDL modules to configure automatic mixing systems or may be used alone as a voice-operated module. The open-collector slave output may be used to trigger other equipment or RDL modules. The versatility of ST-GSP1 applications range from complete automatic mixing system design to the addition of automatic mic gating to the inputs of conventional mixers or amplifiers.

The MIC INPUT may be wired for balanced or unbalanced operation. A phantom voltage terminal is provided for use with condenser microphones. The phantom input accepts dc voltages up to 48 Vdc and is internally filtered. The mic input gain adjustment has sufficient range to accommodate a wide range of microphones, from low-output dynamic microphones to higher-output condensers.

Features:

Gated Mic to Line Preamplifier
Speech Activated Gating
Fast, Silent Audio Switching
Integral Single-Ended Noise Reduction
Adjustable Gain and Threshold
Balanced or Unbalanced Input / Output
Phantom Power Provision
Open-Collector Logic Output

Specifications

Input Impedance:

500 Ω balanced, 5 kΩ unbalanced

Switching Time:

10 ms

Off Delay:

2 seconds nominal (may be extended using external capacitor)

Control Output:

Open-Collector @ 50 mA

Headroom:

> 18 dB (above +4 dBu)

THD+N:

< 0.030% (1 kHz)

CMRR:

> 45 dB

Frequency Response:

15 Hz to 20 kHz (± 0.5 dB into 10 kΩ bridging input)

Residual Noise:

< -80 dB below +4 dBu unweighted (preamp muted)

ON Gain:

45 to 65 dB (Adjustable)

Audio Outputs (1):

+4 dBu nominal, 150 Ω balanced, terminal block

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:

8543.70.9960

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.