RDL®

Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors
product

4 x 1 STEREO AUDIO SWITCHING IN A CLASSROOM

Remote Source Selection and Volume Control

AN-2211

Description:

The classroom is equipped with three A/V sources (Computer, DVD and VCR) and an audio-only input on a wall plate. Staff selects the audio source and sets the level through the RDL RU-ASX4DR Remote Controlled Audio Selector using a D-RC4M Four Channel Remote Control and a D-RLC10M Remote Level Control. All video signals are run directly to the projector which provides video source selection. Sources may be muted by simply de-selecting the active input at the D-RC4M or by operating the MUTE switch on the D-RLC10M. The D-CIJ3D Consumer Input Jack Panel is used to balance the stereo signal of an MP3 player or any consumer source and to provide galvanic isolation.

AUDIO SOURCE SELECTION & LEVEL CONTROL

Multiple Control Locations in a Multi-Purpose Meeting Room / Auditorium

AN-2212

Description:

The multi-purpose room is provided with four different line-level audio sources. Users of the room are able to select their desired source and adjust the audio level from within the space. The RU-ASX4DR Remote Controlled Audio Selector with VCA is controlled by two D-RC4M Four Channel Remote Controls (source selectors) and two D-RLC10 Remote Level Controls (0 to 10 Vdc). Two control locations are shown; up to ten remote locations are possible. All sources may be muted by de-selecting the active input on either D-RC4M. The D-CIJ3D Consumer Interface Jack Panel is used for connection of a user-supplied audio source.

FIXED MIXING OF PODIUM MIC AND LINE INPUTS

Mixing a Condenser Microphone and Stereo Source to a Mono Line

AN-2202

Description:

The sound system in this room is equipped with a mono balanced input from the floor box. When the podium is in use, the presenter uses the condenser microphone and also uses an audio player (or laptop computer) in the podium. The ST-MPA48 provides the P48 phantom voltage for the condenser microphone. The three inputs on the ST-UMX3 Universal Audio Mixer mix the microphone with the left and right unbalanced audio player outputs. The ST-UMX3 provides a balanced mono mic-level or line-level (switch-selectable) feed to the sound system input. The small size of the ST-UMX3 and the ST-MPA48 allows them to be installed in the podium or the floor box. The ST-UMX3 3X1 Universal Audio Mixer is used to combine signals of different level, impedance or balanced/unbalanced configuration. Each input and the output is switch-selectable for mic or line level. Single-turn trimmers are provided for the gain adjustment of each input. The ST-MPA48 contains two identical phantom power circuits and a common power supply input. If only one mic input is to be converted for phantom operation, only one circuit needs to be used. Phantom voltage is not present on the output terminals.

BASIC TWO ROOM COMBINING SYSTEM

School Cafetorium Room Combining System with Automatic Audio Leveling Compression

AN-2124

Description:

This cafetorium can be used as one large room or as two smaller rooms formed by movable wall partitions. Each room has one mic and one mono or stereo line-level input connection through a DS-J3 input plate. EZ-MCP1 Microphone Compressors provide consistent level and overload protection on the mic inputs. ST-CL2 Compressor/Limiters provide the same benefits for the line inputs. The DS-RCX2 Room Controls provide volume control in each room and allow selection of a common external source (typically background music). The RCX-5C controls the audio system configuration, separating or combining the inputs and amplified audio to the speakers according to the room usage (one large room or two smaller rooms). The paging input overrides the audio in the entire cafetorium. Note: The RCX-5C can be used for room combinations from two to five rooms. An HD-PA35UA Audio Power Amplifier is used for each zone in this system to feed 70 Volt speakers. The HD-PA35UA has an automatic sleep mode that shuts off the power amplifier when it is not in use. This offers significant energy savings for systems not operated by technical staff.

5.1 SURROUND SOUND REMOTE LEVEL CONTROL

Multi-Channel Level Control for Theater or Control Room

AN-2159

Description:

The RU-VCA6A Six Channel Digitally Controlled Attenuator and RLC10K Remote Level Control are used to increase and decrease the level of the 5.1 Surround Sound source feeding the amplifiers.
The RU-VCA6A offers clickless level adjustment, accurate tracking and outstanding wide-band, low-noise studio quality performance. It can be controlled remotely by a variety of RDL or third-party controls and/or locally via front-panel pushbuttons. Each audio input and output may be configured balanced or unbalanced. Multiple RU-VCA6As and/or RU-VCA2As may be linked together for single-point level control of 7.1, 10.2 or 22.2 surround sound systems.

STEREO REMOTE AUDIO LEVEL CONTROL

Studio Quality Volume Adjustment for Professional and Consumer Applications

AN-2158

Description:

The RU-VCA2A Two Channel Digitally Controlled Attenuator and RLC10K Remote Level Control are used to increase and decrease the level of the Stereo Sound source feeding the amplifiers.
The RU-VCA2A offers clickless level adjustment, accurate tracking and outstanding wide-band, low-noise studio quality performance. It can be controlled remotely by a variety of RDL or third-party controls and/or locally via front-panel pushbuttons. Each audio input and output may be configured balanced or unbalanced. Multiple RU-VCA2As and/or RU-VCA6As may be linked together for single-point level control of 7.1, 10.2 or 22.2 surround sound systems.

AV SYSTEM FOR CORPORATE FACILITY

Boardroom AV System

AN-2110

Description:

Three compact RDL EZ-series modules handle all the audio and video signals for both local presentations in this boardroom and to interface with
video conferencing. The EZ-MX4ML Mic and Stereo Line Audio Mixer and the EZ-MXA20 20 Watt Stereo Audio Mixer Amplifier together provide
3 mic inputs with phantom power and 3 stereo line-level inputs. The EZ-MXA20 provides 10 Watts to each of the 8 Ohm speakers in the room
and allows for bass and treble tone control adjustment. The EZ-VM22E VGA/XGA Switcher/Equalized Amplifier switches between the video
conference system and the local video source. It also routes the selected video source to both monitors in the room. All the RDL system
electronic products are mounted in an EZ-CC6 Component Chassis. The EZ-RA6 Rack Adapter is available for rack mounting of the EZ series
modules.

AUTOMATIC POWERING OF BOARDROOM A/V SYSTEM

Automatically Turn System On and Off to Conserve Energy and Simplify Operation

AN-2103

Description:

The RDL FP-ECC1 Energy Conservation Controller provides the capability to automatically power up the boardroom A/V electronics when needed and to power down the equipment when not in use to conserve energy and reduce operating costs. FP-ECC1 “trigger” inputs bridge the mic and line level signals from the room and are used to switch the system on. Then the presence of any speaker-level signal at the FP-ECC1 “hold” input keeps the system powered. After a switch-selectable time period of 15, 30, or 60 minutes of no use, the FP-ECC1 will turn off the system electronics. No operator intervention is needed to begin or end use of the system. Audio and video inputs from the room are fed through RDL wall plates. The D-ECR1 Power On/Off Remote Control allows users to manually power up/down the equipment controlled by the FP-ECC1 Controller. The D-ECR1 matches the style of the other wall plates.

BOARDROOM AUDIO POWER AMPLIFICATION

VCA Controlled Audio Amplifier with Matching Remote Control and Input Connector Plates

AN-2102

Description:

RDL passive input plates are used to connect audio and video from the boardroom to a central equipment rack for processing and recording. The D-AVMB2 Audio and Video Jack plate is used for a laptop computer; the D-XLR3F XLR Female Jack plate is used for the lectern microphone. The line output of the audio mixing/switching equipment in the rack feeds an RDL RU-PA40D Stereo Audio Amplifier. The amplifier is equipped with an internal VCA which is controlled by the RLC10K Remote Level Control that matches the style of the input plates. The RU-PA40D provides ample compressed audio power to meet the requirements of both small and large boardrooms and conference rooms.

PRIORITY SWITCHING FROM A VIDEO SOURCE

Multiple Conference Rooms Automatically Switch to a Priority Video Presentation

AN-2006

Description:

This application note shows one of several conference rooms on a corporate campus. The Local A/V Equipment is normally used for meetings held in the room. When a single presentation must be viewed by the entire corporate staff, all the conference rooms are used simultaneously. When the campus-wide presentation is played, the TX-AVX module in each conference room detects the video signal, switches off any local video and routes the presentation video to the projector. The TX-AVX slave output controls the ST-SSR1 which switches off any local audio and routes the presentation audio to the projector or other audio amplifier used in the room. Two ST-SSR1 modules may be connected for stereo. Automatic switching insures the presentation will be viewed in every conference room.

ELIMINATE AUDIO HUM IN BOARD ROOM OR CONFERENCE ROOM

Galvanic Isolation for Audio “Ground Loop”

AN-2099

Description:

A laptop computer that is connected to AC power typically produces a “ground loop” if its audio output is connected to a sound system amplifier. The difference in ground voltage between the computer and amplifier causes a hum in the audio signal. Small “ground loop” voltages can produce high audio hum levels from the speakers. The RDL EZ-HK1 between the computer and the amplifier removes the “ground loop” using a stereo pair of high quality audio transformers in a
shielded metal enclosure. The input jacks are ground-isolated. A round-lift switch allows the output jack shields to be lifted from the metal chassis if required. Audio connections are easy to interface between jack types. The EZ-HK1 input provides both stereo RCA jacks and a stereo mini-jack. The output
also is provided on stereo RCA jacks or a stereo mini-jack.

ELIMINATE AUDIO AND VIDEO HUM IN MEETING ROOM

Galvanic Isolation for Audio and Composite Video “Ground Loops”

AN-2098

Description:

Picture and sound quality from the player on the equipment cart is easily degraded by a “ground loop”. The difference in ground voltage between the audio/video source and monitoring locations can create herringbone patterns or rolling hum bars in
the video, and hum in the audio. Small “ground loop” voltages can easily impair the quality of audio and/or video signals. The RDL EZ-HK3 removes the “ground loop” using a stereo pair of high quality audio and video transformers in a shielded metal enclosure. The input jacks are ground-isolated. A ground-lift switch allows the output jack shields to be lifted from the metal chassis if required.

CORPORATE CONFERENCE/PRESENTATION CENTER

Audio/Visual, Wireless Mic System, 3 Channel Mixing with 40 Watt Amplifier

AN-2051

Description:

This Conference/Presentation center is equipped with multiple wall input plates for auxillary audio/video sources such as a laptop computer and wireless microphone. The system includes a mixer with remote volume and muting control. Wall plates are shown at the front of the room where presentations are normally staged. The video input jack is wired directly to the projector using a standard VGA video cable. All signal and control connections between the three wall plates and the mixer use CAT5 wire. The remote controlled mixer is used to set audio levels from the audio input wall plates. The volume and muting controls are located at the front of the room allowing easy access before and during presentations. The amplifier is switched to mono and 4Ω; the output is driving four 8Ω speakers. All wall controls and panels are available in RDL standard white/gray or in stainless steel with custom labeling available.

PRIORITIZED PAGING

Paging from Multiple Locations

AN-2016

Description:

This application provides multiple paging locations, with priority assigned to each location. Each location has a mic with a PTT (push-to-talk) momentary pushbutton that provides external switching contacts. The STM-2 preamp for each microphone should be installed near the associated mic. Wiring between each STM-2 output and the corresponding ST-LCR1 is balanced, connected with shielded or unshielded twisted-pair cable. When a PTT button associated with a microphone is depressed, the music fades down and paging becomes active. The highest priority mic overrides the lower priority mic(s). This arrangement may be carried out for an unlimited number of paging locations. If the background music source provides only unbalanced outputs, an STA-1M Audio Line Amplifier may be used to provide a balanced signal at the proper level.

If solid state switching is preferred, an ST-SSR1 Solid State Audio “Relay” may be substituted for each ST-LCR1.

The FP-PA20A 20 Watt Power Amplifier feeding 70 Volt speakers is used in this example. RDL offers a wide range of power amplifiers for paging
and public address applications.