RDL RU-VCA6A Digitally Controlled Six Channel Audio Attenuator

RDL RU-VCA6A Digitally Controlled Six Channel Audio Attenuator

RDL RU-VCA6A Digitally Controlled Six Channel Audio Attenuator

B&H # RDRUVCA6A MFR # RU-VCA6A
RDL RU-VCA6A Digitally Controlled Six Channel Audio Attenuator

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Product Highlights

  • Local or Remote Audio Level Control
  • Attenuate Six Channels or Surround Sound
  • Noiseless Zero-Crossing Adjustment Steps
  • 96 dB Attenuation Range in 0.5 dB Steps
  • Adjustment of Multiple Modules
  • Precise Level Tracking on Each Channel
  • Balanced/Unbalanced Line Inputs/Outputs
  • Adjustable Ramp Up/Down Rates
  • Selectable Level Control Options
  • Selectable Master/Slave Mode
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  • 1Description

The Radio Design Labs RU-VCA6A Digitally Controlled Six Channel Audio Attenuator is a six-channel audio attenuator module for local and/or remote control of balanced or unbalanced line-level sources. The unit has six audio channels for level control of surround sound (5.1) or six individual analog audio channels. Each module can be remote controlled from a single or multiple locations. Rear-panel terminals provide flexible control options using a variety of RDL remote controls or OEM equipment.

Audio levels are controlled in 0.5 dB steps using noiseless zero-crossing digital attenuators for optimum reliability, precise tracking, and long-term click-free service. Wide-band low-noise performance makes the attenuator suited to level adjustment in the most demanding applications. Rear-panel inputs and outputs may each be wired balanced or unbalanced.

The RU-VCA6A powers up in one of two operating modes set by a rear-panel switch. In the MOM (momentary) mode, audio level is controlled by momentary pushbuttons or pulses. Remote terminals and front-panel pushbuttons are provided for up and down ramping control. If either button is held in, the audio will ramp automatically. If a button is pulsed (< 0.5 second), the audio will increment one step. The time of both the UP and DOWN ramps is individually adjustable on the front panel.

Pushing remote UP and DOWN buttons simultaneously, or pressing the front-panel GO TO PRESET button, returns the audio to a preset level. The preset level is stored by adjusting the desired level using the UP and DOWN buttons, then pressing and holding the front-panel PRESET button for 3 seconds. A rear-panel switch sets the audio power-up level to either the preset level or the last level setting used. Multiple remote control locations are possible in the MOM mode. External control pulses may be either of positive polarity or pulled-to-ground (open-collector).

In the 0 to 10 VDC mode, the preset function is disabled and the audio level is controlled by a remote 10 kΩ linear taper pot or by 0 to 10 VDC. A single remote control location is possible using a remote 10 kΩ pot.

In both operating modes, two separate 0 to 10 VDC outputs are provided. The linear RAMP output drives the level display on RDL remote controls; the EQ RAMP output is used to control an automatic RDL Loudness Equalizer. A front-panel 10-LED string display indicates the relative audio level. Control expansion is possible using the EXTERNAL CONTROL DATA jacks. One module can be set as a MASTER module to control the level of one or more additional RU-VCA2A or RU VCA6A modules set to the SLAVE mode.

The unit can be used individually, or combined with other RDL products as part of a complete system.

UPC: 813721013460
In the Box
RDL RU-VCA6A Digitally Controlled Six Channel Audio Attenuator
  • Limited 3-Year Warranty
  • Table of Contents
    • 1Description
    Inputs 6x >10 kΩ balanced bridging or unbalanced line level
    Frequency Response 10 to 50,000 Hz (± 0.5 dB)
    THD + N < 0.005% (20 to 20,000 Hz)
    Gain Adjustable from unity to < -96 dB
    Steps 0.5 dB
    Headroom > 18 dB (above +4 dBu)
    Residual Noise < -90 dB (referred to +4 dBu at unity gain)
    CMRR > 65 dB (50 to 150 Hz)
    Crosstalk < -95 dB (1,000 Hz typical)
    < -85 dB (20 to 5,000 Hz)
    < -75 dB (5,000 to 20,000 Hz)
    Ramp Times 0.5 second delay; then: 3 seconds to 10 seconds
    (UP and DOWN times individually adjustable on front panel)
    Indicators 10x front panel LEDs indicating relative audio, maximum condition, and minimum condition
    Audio Outputs 6x 150 Ω balanced (may be connected unbalanced)
    Ramp Output 0 to 10 VDC, (ground-referenced) note: not intended to drive additional VCA 0 t 10 V inputs
    EQ Ramp Output 0 to 10 VDC, (ground-referenced) Note: dc taper intended only to drive RDL Loudness EQ (ST-LEQ1)
    Ambient Operating Temperature 32 to 122°F (0 to 50°C)
    Power Requirement 24 VDC at 200 mA, ground referenced
    Dimensions (W x H x D) 5.75 x 1.65 x 3.54" (14.6 x 4.18 x 9.00 cm)
    Weight Not specified by the manufacturer
    Packaging Info
    Package Weight 1.52 lb
    Box Dimensions (LxWxH) 6.0 x 6.0 x 2.625"

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