Product Description
RDL ST-VP2 Automatic Ducking Module
Overview
The ST-VP2 can be wired into any line-level input of a paging amplifier. A line-level music source may be provided from a receiver, satellite decoder, tape or CD source. A line-level voice source may be provided from a telephone paging system at line level, or from a microphone which has been preamplified up to line level (See RDL STM-1, STM-2, STM-2X, STM-3, STM-LDA3 Microphone Preamplifiers). When a page is initiated, the module automatically senses the audio at the input, turns the music down to the desired level, and automatically fades the music back up after the page is completed. The VOICE input is completely turned off by the module until the next paging signal is received. Setup is made easy by two LED indicators at the front of the module. LEDs are provided to show correct operating level for each of the two inputs.
The music input provides an AGC/Compressor which transparently produces a consistent audio level for varying music sources and protects against excessive music levels which would otherwise mask the voice signal during voice-overs.
Power Supply Not Included
Recommended Power Supply:
- PS-24AS (USA)
- PS-24AX (International)
Features
- Fully AUTOMATIC Voice-Over Mixing
- Noiseless Paging
- Adjustable Fade Depth
- Setting to Fade Music Fully Off
- Adjustable Recovery Rate
- Built-in AGC Compressor on Music Input
Specifications
Construction | Plastic, metal |
Finish | Black |
Input | Inputs: (2) balanced line level (or unbalanced) Input impedance: 20KΩ Input signal range: -20 dBu to +18 dBu |
Output | 0dBu balanced (into 600Ω) |
Gain | Adjustable using multi-turn potentiometer |
THD & Noise | < 0.02% (20Hz to 20kHz, no compression) |
Frequency Response | 25Hz to 20kHz (+/- 1dB) |
Noise | < -70dB |
Indicators | (1) LED indicating proper music level (1) LED indicating proper voice level |
AGC Action | 18dB range 6dB compression at normal input level |
Attack Time | 25 ms |
Release Time | 2.5 seconds |
Voice Trigger Level | 24dB below operating level |
Music Fade Depth | Adjustable 0dB to -25dB, or off |
Music Recovery Delay | Adjustable 2 to 4 seconds |
Power | Ground-referenced, 24 to 33VDC @ 35mA |