Description:
Speeches, government meetings, product announcements and other media events covered by reporters require multiple high quality audio feeds in the press room. The recording equipment may require a balanced or unbalanced line level or mic‑level signal. Each output feed must be isolated so that if one output is accidentally shorted or back‑fed, all other feeds and the public address system remain unaffected. An RDL RU‑ADA8D Audio Distribution Amplifier provides isolated audio output signals that drive a variety of audio jacks on a "Media Panel." An RDL RU‑MX4 Professional 4‑Input Mixer with selectable compressor is used to mix the audio sources. The line‑level mix is distributed by the RU‑ADA8D to up to 16 line‑level outputs on RCA, 1/4" phone, or XLR jacks. Any of these outputs could be padded down to mic level using RDL TX‑LM2 line‑level to microphone‑level transformers. All jacks shown are on Decora® compatible wall plates. These jacks are also available in the RDL AMS series should a custom rack or tabletop configuration be preferred. Video distribution may be added using RDL composite and VGA/XGA distribution amplifiers.

Description:
This example shows how to utilize a telephone line (input) port on an existing KSU to add paging from the telephone system to a background music (BGM) system. The ST‑TC1 acts as a virtual telephone line when connected to a KSU FX port. When that “line” is selected using any phone instrument connected to the KSU, the ST‑TC1 provides audio from the instrument mouthpiece to the ST‑VP2 Automatic Ducking Module. The ST‑VP2 automatically ducks the background music audio for the duration of the page, then ramps up the music at the end of the page. In this example an FP‑PA20A 70 volt amplifier is powering 70 volt loudspeakers in the office area. The ST‑TC1 provides relay contact closures when it is activated by a telephone instrument. The relay contacts can be used to provide additional functions when paging is active, including visual indicators or triggering a radio transmitter.

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.

Description:
A video source distributed to remote viewing areas such as public transport waiting areas or overflow meeting rooms is easily degraded by “ground loops”. The difference in ground voltage between the video source and monitoring locations can create herringbone patterns or rolling hum bars. Small “ground loop” voltages can easily impair the quality of a 1 Volt video signal. The RDL EZ‑HK2 at the monitor location removes the “ground loop” using a high quality video transformer in a shielded metal enclosure. The input jack is ground‑isolated. A ground‑lift switch allows the output jack shield to be lifted from the metal chassis if required.

Description:
The security camera at the top of the ski lift feeds an RDL TX‑TPS1C Active Three Pair Sender. At the end of about one mile of twisted pair cable, a TX‑TPR3C Twisted Pair Receiver feeds the video monitor in the security office. The TX‑TPR3C is set to terminate the twisted pair cable. GAIN and EQ controls are adjusted to compensate for cable losses. Note: Two audio pairs are also available on the RDL Format C modules. No audio is shown in this application; the audio channels could be used to provide talk‑back capability from the upper lift operator station.

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.

Description:
Random white noise generated by the ST‑NG1 White and Pink Noise Generator is fed to Input 2 of the HD‑MA35A Mixer Amplifier. A Paging Source is connected to Input 1 of the HD‑MA35A. The Mixer Amplifier can be programmed to attenuate (duck) the white noise by 25dB during a paging event. Ducking can be initiated either manually, from a contact closure on the paging device, or automatically by adjusting the Input 1 VOX sensitivity on the HD‑MA35A. The ST‑NG1 is powered directly from the 24 Vdc output on the rear of the HD‑MA35A.

Description:
This application shows the layout of a two zone noise masking system. The white noise line output from the RDL ST‑NG1 feeds the inputs of two RDL FP‑PEQ3 parametric equalizers. The FP‑PEQ3 equalizers allow the installer to flatten the noise spectrum in each zone. The line output of each FP‑PEQ3 is fed through RDL FP‑PA20A 20W, 70/100 V power amplifiers. The 70 V output of each FP‑PA20A feeds multiple 70 V speakers in its associated zone. Multiple equalizers and amplifiers may be added for larger systems with more zones.

Description:
Waiting rooms, airport terminals, dispatch centers, and operations hubs are just a few of the locations where multiple monitors of computer generated video are needed. The EZ‑VMD4 provides one local monitor plus three monitor outputs. Outputs offer wide RGB bandwidth for superb graphics reproduction and high resolution compatibility from VGA through QXGA. Front panel switches allow ID BIT selection and selection of TTL or Video 75 Ω sync. The compact size of the EZ‑VMD4 allows the use of this professional quality distribution amplifier even when equipment space is limited.

The EZ‑VMD4 is shipped with a high‑efficiency power supply that connects to a locking dc power jack.

Description:
The four broadcast studio control rooms located in the same building all receive a news feed from the local “News Room Studio” announce booth. The RDL HR‑MP2 Dual Channel Microphone Preamplifier produces line‑level audio from the news room microphone(s) to feed the RDL HR‑ADC1 Analog to Digital Audio Converter. Its digital output is connected to the RDL HR‑DDA4 Digital Audio Distributor which delivers an isolated digital audio feed to each control room. The format of each digital output is switch‑selectable AES/EBU, S/PDIF coaxial, or AES‑3ID. The HR‑ADC1, HR‑DDA4 and HR‑MP2 are rack mountable using optional RDL rack adapters. All three units may be powered from the same RDL 1000 mA 24 Vdc supply. Note that if stereo microphones are used in the announce booth, the equipment shown can preamplify and distribute both channels to the four control rooms.

Description:
The daily Calendar of Events listing at this hotel is generated from an office computer. An RDL EZ‑VM14 distributes the VGA signal of the schedule display to three monitors located near the entrances of the hotel meeting rooms. The wide bandwidth of the EZ‑VM14 insures that the same high resolution image seen at the local monitor is seen at each hotel monitor.

Description:
The RDL RU‑AFC2 Stereo Audio Format Converter provides bi‑directional interface between unbalanced consumer and balanced professional audio formats. The audio fidelity, low noise, low distortion and excellent crosstalk performance of the RU AFC2 are ideally suited to the most critical applications. The RU‑AFC2 receives the unbalanced stereo output from the CD player and converts it to professional balanced +4 dBu to feed a mixing console input. The balanced stereo mixer output is converted by the RU‑AFC2 to an unbalanced ‑10 dBV signal feeding the analog inputs of the digital audio recorder.

Description:
An RDL TX‑J2 Unbalanced Input Transformer provides a balanced mono audio source from the computer in this information kiosk. The FP‑PA18H 18 Watt Mono High Temperature Audio Amplifier provides ample power to drive the 8 Ohm speaker. Its integral compressor/limiter provides consistent levels for enhanced intelligibility without clipping. The ST‑PA18H is rated for operation between 0 and 70 degrees C (158 degrees F) so that it can operate comfortably when used in a space that is not temperature controlled.

Description:
This application allows the master location to talk to all four studios simultaneously and select which studio is heard by the master location.

Description:
The mixing of multiple phantom‑powered mics is often required in various stage or public meeting room installations. The STD‑150 mixes the mic signals equally and passes phantom voltage generated by the mic preamp back to each of the mics. Each mic should have the same gain and should operate from a wide range of phantom voltage, as there is a small phantom voltage loss through the STD‑150. The STM‑3 works well in most applications but for critical, low noise installations the FP‑MP1 is recommended. The gain of the three microphones is set on the STM‑3. If individual mic gain adjustment is desired, use the RDL FP‑MX4 (4 channel ultra‑low‑noise mixer with switchable phantom and gain for each mic).

Description:
One channel of the RDL HR‑MCP2 Dual Microphone Compressor is connected in‑line between each talent studio microphone and the mixer. The HR‑MCP2 automatically adjusts the volume for best intelligibility for a wide range of presenters’ speaking styles, from soft‑spoken to excited. Phantom voltage (IEC Standard 48 Volt) may be provided by the HR‑MCP2 to power any condenser microphone. The HR‑MCP2 provides transparent audio level adjustment and compression over a 25 dB range. It insures freedom from clipping and overload distortion, providing consistent audio levels throughout a broadcast and/or from one guest to the next. A single HR‑MCP2 provides automatic gain reduction for the two separate microphones, host and guest. Front‑panel LED metering strings simplify proper gain adjustment to produce the desired amount of normal and overload gain reduction. Without the HR‑MCP2, dynamic level extremes caused by untrained guests who become excited or suddenly approach the microphone can cause clipping in the mixer and require adjustment by the board operator. Installation of an HR‑MCP2 ahead of the mixer input prevents overload clipping and provides consistent levels to the mixer. The HR‑MCP2 is ideal for studio use as well as for crowd and audience microphones. The output of each HR‑MCP2 channel may be set to provide either mic or line level to the mixer.

Description:

An RDL FP‑MR2 Message Repeater plays back pre‑recorded messages and provides ducking or muting of the BGM source during message playback. The message repeater can be programmed to repeat automatically or may be triggered manually. Two dynamic or condenser microphones are pre‑amplified to line‑level by an RDL HR‑MP2 Dual Microphone Preamplifier. All three audio sources (BGM/Message Repeater, Paging Mic 1, Paging Mic 2) are distributed to each of the three floors of an office or retail building over readily available CAT5 cabling utilizing an RDL RU‑TPS4A Active Sender/Distributor and three TX‑TPR3A Active Receivers (one per floor). Each Active Receiver provides line‑level audio to an RDL HD‑MA35A Mixer Amplifier. The BGM/Message Repeater signal connects to Input 2 of the mixer amplifier on each floor. Input 1 of each mixer amplifier is fed from the Receiver output that corresponds with the Paging Mic (1 or 2) that will be used to page on that floor. Input 1 is set to "duck" the other amplifier input(s) so paging will take priority.

The RDL Format‑A twisted pair products provide flexibility and expandability for this multi‑zone paging system. Additional floors may be added using additional receiving modules and amplifiers./

Description:
This example shows a four channel audio distribution system. The system uses a compact, studio quality, stereo audio distribution amplifier to feed four separate headphone amplifiers. The headphone amplifiers have individual volume controls for easy user adjustablility. The output amplifiers deliver more than 50 mW into either high or low impedance headphones through a durable, metal ¼" (6.3 mm) headphone jack.

Description:
Speeches, government meetings, product announcements and other media events covered by reporters require multiple high quality audio feeds in the press room. The recording equipment may require a balanced or unbalanced line level or mic‑level signal. Each output feed must be isolated so that if one output is accidentally shorted or back‑fed, all other feeds and the public address system remain unaffected. An RDL RU‑ADA4D Audio Distribution Amplifier provides isolated audio output signals that drive a variety of audio jacks on a "Media Panel." An RDL RU‑MX4 Professional 4‑Input Mixer with selectable compressor is used to mix the audio sources. The line‑level mix is distributed by the RU‑ADA4D to up to 8 line‑level outputs on RCA, 1/4" phone, or XLR jacks. Three of its outputs are padded down to mic level using RDL TX‑LM2 line‑level to microphone‑level transformers. All jacks shown are on Decora® compatible wall plates. These jacks are also available in the RDL AMS series should a custom rack or tabletop configuration be preferred. Video distribution may be added using RDL composite and VGA/XGA distribution amplifiers.

Description:
The RU‑VCA6A (6 channel) and RU‑VCA2A (2 channel) Digitally Controlled Attenuators are arranged in a MASTER/SLAVE configuration to allow single point level control of the 7.1 surround sound source feeding the amplifiers. Either VCA module may serve as master. This application uses an RLC10K Remote Level Control to control the RU‑VCA6A. The RU‑VCA6A control output port is connected to the control input of the RU‑VCA2A, which is set to slave mode. The RU‑VCA2A follows the level setting of the RU‑VCA6A. Multiple VCA modules may be slaved from a single master module. The RU‑VCA6A and RU‑VCA2A offer clickless level adjustment, accurate tracking and outstanding wide‑band, low‑noise studio quality performance. They can be operated remotely by a variety of RDL single or multi‑point controls, third party controllers and/or locally via front‑panel pushbuttons. Each audio input and output may be wired balanced or unbalanced. The RU‑VCA6A and the RU‑VCA2A may be used independently in 5.1 surround and stereo systems.

Description:
This system uses an RU‑MX4 four‑channel studio‑quality mic/line mixer for rental staging applications. A cart is used for moving the mixer, microphones, and other AV gear to the location where they are required. The mixer output feeds a high quality XLR wall plate that is directly wired into the house audio system. The mixer provides user‑adjustable input gain for level matching as well as an output trim and level meter for total adjustability in a compact package. The RU‑MX4 provides phantom power for condenser microphones and has a switchable soft‑knee compressor to avoid transient overloads.

Description:
This example shows how to utilize telephone line (input) ports on an existing KSU to add two zones of paging from the telephone system. The ST‑TC1 acts as a virtual phone line when interfaced with a KSU FX port. When either “line” is selected using any phone instrument connected to the KSU, the associated ST‑TC1 provides an audio path from the instrument mouthpiece to the paging amplifier. In this example two FP‑PA20A 70 volt amplifiers are powering 70 Volt loudspeakers in the two office areas. The ST‑TC1 provides relay contact closures when it is activated by a telephone instrument. The relay contacts can be used to provide additional functions when paging is active, including visual indicators or triggering a radio transmitter.