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General Information
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Manufacturer
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RDL
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Manufacturer Part Number
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RDL-RUASX4DR
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Product Name
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Rack Up
Series Remote Controlled Stereo Audio Selector With VCA, 4 Stereo
Inputs to 1 Stereo Output |
| UPC Code |
813721013507
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Overview
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The RU-ASX4DR is a four
channel stereo audio selector with input gain adjustments and
output level metering. The module is equipped with an internal
stereo VCA for setting the output level
Source selection and level adjustment are by remote control. Each
module may be remote controlled from single or multiple
locations
Rear-panel terminals provide flexible control options using a
variety of RDL remote controls or OEM equipment. The inputs and
output are connected on rear-panel detachable terminal blocks
Each of the four stereo line level inputs accepts either a
balanced or an unbalanced signal. Each input is equipped with a
rear panel screwdriver-adjustable input gain trimmer
Input signal levels between -15 dBV and +8 dBu may be set to the
proper operating level as indicated by a stereo dual-LED VU meter.
This assures ample headroom at all normal operating levels
The module is equipped with two identical sets of stereo dual-led
VU meters, one on the front panel, the other on the rear panel.
The maximum input level is +25 dBu
The RU-ASX4DR was designed for silent switching of audio signals
using only solid-state switching circuitry. Each of the VU-meters,
left and right, is calibrated to read +4 dBu feeding the
corresponding balanced output
The audio output level is controlled by a remote 10 kOhms linear
taper pot or by 0 to 10 Vdc. A single remote control location is
possible using a remote 10 kOhms potentiometer. The RU-ASX4DR is
compatible with RDL D SERIES-RLC10 rotary remote controls that
provide user adjustment at single or multiple locations
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. The output is stereo
line level. Each output channel may be connected balanced or
unbalanced
Inputs are selected by a sequential remote control such as an RDL
D-RCS4, by a momentary remote control such as an RDL D-RC4M or by
an external open-collector momentary closure to ground. The
RU-ASX4DR may be remote controlled from a single or from multiple
locations
When a source is selected, the RU-ASX4DR provides a 25 mA
open-collector output to control other equipment or modules. A
front-panel LED indicates the selected source. Only one source may
be selected at a time
If the momentary input terminal for a selected source is triggered
again, all inputs are turned off. Rear-panel DIP switches are
provided to set the VCA activity LEDs for momentary or continuous
display, to select the remote control mode (sequential or
individual source selection), and upon power-up a return to either
a pre-programmed source or to the last source used
The pre-programmed source is stored when the module is installed
and can be re-programmed at any time. The RU-ASX4DR offers
exceptional headroom, very low distortion, excellent crosstalk
isolation, wide flat frequency response and extremely low noise
with very high common-mode signal rejection
It provides exceptional audio performance for the most critical
applications in a professional audio environment. The RU-ASX4DR
operates from 24 Vdc connected through a rear-panel detachable
terminal block
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Features
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- Remote controlled switching and
level control
- Multiple remote control
locations possible
- 4 stereo inputs to 1 stereo
output
- Line level audio switching
- External level control using 10
kOhms
- Potentiometer or 0 to 10 Vdc
- 96 dB attenuation range in 0.5
dB steps
- Noiseless zero crossing
adjustment steps
- Precise level tracking on each
channel
- Balanced or unbalanced inputs
and output
- Gain trim on each source
- Controllable using various RDL
remote controls
- Open collector output for
selected input
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Pictures
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Specifications
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| Audio
Inputs (4) |
Stereo,
Line level on Detachable Terminal Block
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| Input
Impedance |
Greater
than 20 kOhms balanced, Greater than 10 kOhms unbalanced
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| Input
Level (for +4 dBu output) |
-15
dBV to +8 dBu, adjustable on rear-panel trimmers
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| Maximum
Input Level |
+25
dBu
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| Common
Mode Rejection |
Greater
than 60 dB (50 Hz to 120 Hz)
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| Headroom
(above +4 dBu) |
Greater
than 18 dB (unity gain)
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Frequency
Response
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10 Hz
to 20 kHz (More or less 0.2 dB)
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| Distortion
(THD + N) |
Less
than 0.01 percent (20 Hz to 20 kHz)
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| Noise
(below +4 dBu) |
Less
than -85 dB (with any input selected); Less than -95 dB (with no
input selected)
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Off
Attenuation
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Greater
than 85 dB (1 kHz), Greater than 70 dB (20 kHz)
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| Crosstalk |
Less
than -80 dB (1 kHz); Less than -60 dB (20 kHz)
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| Front-Panel
Indicators (11) |
Power,
Selected channel (4), VCA activity up/down (2), L and R Dual-LED
VU meters (4)
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Audio
Output
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Stereo,
Line level on Detachable Terminal Block
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Output
Impedance
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150
Ohms balanced, 75 Ohms unbalanced
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Output
Level
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+4
dBu balanced, unbalanced output 6 dB below balanced output level
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Control
inputs (6)
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1 mA, pulled to ground (4, source selection); 1 mA,
pulled to +15 Vdc (SEL); 0 to 10 Vdc (VCA)
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Control
outputs (5)
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25
mA, open-collector to ground
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VCA
Control Input
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0 to 10 Vdc; or 0 to 10 kOhms linear potentiometer
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Rear-Panel
Indicators (4)
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L and
R Dual-LED VU meters
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| RDL Remote Control Compatibility |
D-RC4M, D-RCS4 (source selection); D-RLC10, D-RLC10M,
D-RLC10K, D-RLC10KM, D-RLC3 (VCA)
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| Power Connection |
Detachable Terminal Block
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| Power Requirement |
24 Vdc at 175 mA, Ground-referenced
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| Ambient Operating Environment |
0C to 55C
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| Dimensions |
1.64" x 5.74" x 3.42" |
| Weight |
1.22 lbs
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| Shipping Weight |
1.53 lbs |
