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PRIORITIZED PAGING Voice-Over/Paging with Multiple Paging Locations
PRIORITIZED PAGING
Voice-Over/Paging with Multiple Paging Locations
AN-2041
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‑VP1 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.

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.
PRIORITIZED PAGING Paging from Multiple Locations
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.
SOURCEFLEX SYSTEM - Two Zones Two Room Tanning Salon
SOURCEFLEX SYSTEM - Two Zones
Two Room Tanning Salon
AN-2002
Description:
This application distributes program sources, typically music, to two (up to four) different zones using RDL’s SourceFlex system. The stereo outputs from two separate audio sources are converted to balanced mono signals using two RDL TX‑J2s. These signals feed SAS‑8i SourceFlex Audio Input Chassis inputs. The SAS‑8i allows the installer to set the maximum listening level at each station. Each tanning room has an SAS‑RC8 Room Control Station that allows customers to select a program source and adjust the audio level. The system shown accomodates up to eight audio sources and supports up to four zones. Additional zones may be added using available RDL control modules.
REMOTE AUDIO SOURCE SELECTION & LEVEL CONTROL Restaurant or Club Sound System with Four Sources
REMOTE AUDIO SOURCE SELECTION & LEVEL CONTROL
Restaurant or Club Sound System with Four Sources
AN-2138
Description:
The RU‑SX4A Balanced Audio Switcher is controlled by the RCS4S Remote Channel Selector to select 1 of 4 audio sources. The output of the RU‑SX4A is connected to the audio input of the HD‑PA35UA. The HD‑PA35UA is a 35 Watt constant voltage amplifier with an internal VCA which is controlled by an RLC10KMS Remote Level Control with Muting. The HD‑PA35UA features an integral audio compressor that controls clipping. The RCS4S and RLC10KMS are mounted inside a two gang box* with an RDL CP‑2S Stainless Steel Cover Plate.
AUTOMATIC CONTROL OF RESTAURANT AV SYSTEM POWER Conserve Energy and Provide Unattended Operation
AUTOMATIC CONTROL OF RESTAURANT AV SYSTEM POWER
Conserve Energy and Provide Unattended Operation
AN-2107
Description:
The RDL FP‑ECC1 Energy Conservation Controller automatically powers up the electronics for this restaurant when needed and powers down the equipment when the restaurant is vacant to conserve energy and reduce operating costs. Motion sensors in the restaurant public areas trigger the FP‑ECC1 to switch on the system equipment power outlets. Continued activity in the seating areas will retrigger the FP‑ECC1 to keep the system turned on. After a switch‑selectable time period of 15, 30, or 60 minutes with no activity, the FP‑ECC1 will turn off the system electronics. No operator intervention is needed to turn the system on or off. An STM‑2 Microphone Preamplifier amplifies the reception desk paging microphone to line level. The associated push‑to‑talk switch causes the ST‑VP1 Voice‑Over/Paging Module to insert paging mic announcements through the house system. The D‑ECR1L Power On/Off Remote Control allows the system to be manually turned on and/or off. It also provides a system master level control to adjust the volume of the RU‑PA40D 40 Watt Stereo Power Amplifier.
AUDIO DISTRIBUTION OVER TWISTED PAIR Multi-Zone Paging w/BGM and Message Repeater
AUDIO DISTRIBUTION OVER TWISTED PAIR
Multi-Zone Paging w/BGM and Message Repeater
AN-2144
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./

INTERCOM USING SINGLE REMOTE SPEAKER Speaker Serves Dual Duty as Microphone and Speaker
INTERCOM USING SINGLE REMOTE SPEAKER
Speaker Serves Dual Duty as Microphone and Speaker
AN-2021
Description:
This intercom application reduces the hardware requirements for a secure or weatherproof call box like those found in drive‑through talkback systems or secured entryways. The ST‑IC1 Intercom Amplifier input accepts a dynamic mic or phantom powered condenser mic. It can also use an 8 Ω or a 45 Ω speaker as a microphone element. An ST‑LCR1 Logic Controlled Relay is used in this application to switch a remote speaker so that it can function alternately as a speaker and as a microphone.
PATIO AUDIO SYSTEM House Audio System with MP3 Player and 4 Outdoor Rock Loudspeakers
PATIO AUDIO SYSTEM
House Audio System with MP3 Player and 4 Outdoor Rock Loudspeakers
AN-2026
Description:
A stereo unbalanced audio signal from the house audio system is summed and converted to a balanced mono signal using the TX‑J2 Unbalanced Input Transformer. The patio is equipped with a DS‑CIJ3 Consumer Input Jack Decora® plate that provides connectivity for an MP3 music player or other stereo audio source. Source selection is controlled by the house audio system and volume is controlled using the house audio system and/or the MP3 player, if it’s in use. An RDL FP‑PA20A 20 Watt 70 Volt Audio Power Amplifier powers four 70 Volt outdoor rock speakers in a patio seating area. Each speaker is tapped at 5 Watts, for a total of 20 Watts. Using a 70 Volt system allows for the use of smaller cable sizes which reduce system costs and simplify the installation. An RDL FP‑PA20B 20 Watt 25 Volt Audio Power Amplifier may be used in place of the FP‑PA20A if a 25 Volt system is desired.
AUTOMATIC CONTROL OF HOTEL AUDIO SYSTEM POWER Conserve Energy and Simplify Unattended Operation
AUTOMATIC CONTROL OF HOTEL AUDIO SYSTEM POWER
Conserve Energy and Simplify Unattended Operation
AN-2105
Description:
The RDL FP‑ECC1 Energy Conservation Controller automatically powers up the electronics for this hotel meeting room when needed and powers down the equipment when the audio sources are not in use to conserve energy and reduce operating costs. “Trigger” inputs bridge the mic and/or line level signals from the room to switch the system equipment on. Once on, the presence of a line level signal from the RU‑MX4 Mixer at the “hold” input keeps the system powered. After a switch‑selectable time period of 15, 30, or 60 minutes with no audio, the FP‑ECC1 will turn off the system electronics. No operator intervention is needed to turn the system on or off. The RLC10K wall control connected to the ST‑VCA3 Voltage Controlled Amplifier allow adjustment of background music levels when there is no live event in the room. The D‑ECR1L Power On/Off Remote Control allows the system to be manually turned on and/or off. It also provides a system master level control to adjust the volume of the RU‑PA40D 40 Watt Stereo Power Amplifier.
DISTRIBUTED AUDIO FOR EXERCISE FACILITY SourceFlex System Provides Individual Headphone Stations
DISTRIBUTED AUDIO FOR EXERCISE FACILITY
SourceFlex System Provides Individual Headphone Stations
AN-2088
Description:
Each piece of exercise equipment is outfitted with an RDL SAS‑HC8 Headphone Control Station so that users can select from eight audio programs and adjust volume to their own preference. Six audio sources in this system are associated with video monitors at the front of the room. A TX‑J2 Unbalanced Input Transformer is used to combine each stereo signal to mono. Two other channels are from radio or satellite receivers. The SAS‑8i Audio Input Chassis also provides an “all call” paging input.

The SAS‑8i supports four SourceFlex listening stations and multiple SourceFlex expansion chassis’. Listening station expansion may be added in groups of two with the SAS‑82 2 Station Audio Controller or in groups of eight with the SAS‑8C 8 Station Audio Controller. There is no practical limit to the number of listening stations in any system. Connections between the controller and each listening station use a multi‑conductor twisted‑pair cable. The SourceFlex system is reliable and cost effective without the problems of wireless systems with rechargable batteries.
COMMERCIAL PRIORITY PAGING SYSTEM Facility-wide Paging Interrupts Background Music System
COMMERCIAL PRIORITY PAGING SYSTEM
Facility-wide Paging Interrupts Background Music System
AN-2014
Description:
This system demonstrates how an auxiliary 70 V paging system can override the loudspeakers from a local 70 V background music system (BGM) using the TX‑PCR1 Paging Controlled Relay. In normal operation, the BGM 70 V speaker line will route through the normally closed contacts of the TX‑PCR1 to the local 70 V loudspeakers. The auxiliary 70 V system (in this case the Paging/Announcement System) feeds both the 70 V input and the normally open contacts on the relay unit (TX‑PCR1). When a signal is present on the auxiliary 70 V line, the relay unit senses the signal and throws the DPDT relay routing the auxiliary amplifier to the local loudspeakers.
ROOM COMBINING IN FUNERAL HOME SPACE RCX-5C System Allows Flexible Use Of Facility
ROOM COMBINING IN FUNERAL HOME SPACE
RCX-5C System Allows Flexible Use Of Facility
AN-2001
Description:
An RCX Room Combining System allows independent audio systems in up to five separate zones to be combined as one single system or to be combined with one or more adjacent zones. The funeral home in this example has a public space that may be divided by partitions into two or three separate areas. Each of these three zones is equipped with an RCX‑2 Room Control to select between local audio sources or background music, and to adjust speaker volume in the zone. Local mic and/or line‑level audio sources connect through the RCX‑J3 Audio Input Plate. When partitions are opened, the RCX‑5C Controller is used to combine the audio inputs and controls to feed all the speakers in the combined area. The FP‑PA20A 20 Watt RMS Audio Power Amplifier drives 70 Volt speakers in each zone.
BASIC PAGING OVER BACKGROUND MUSIC User-Controlled Voice-Over Paging with 70 V Amplification of BGM and Paging
BASIC PAGING OVER BACKGROUND MUSIC
User-Controlled Voice-Over Paging with 70 V Amplification of BGM and Paging
AN-2050
Description:
This system allows a push‑to‑talk tabletop microphone to interrupt background music during paging. The system can be set up to completely remove the background music or to simply duck the music to a preset level. The ST‑VP2 Automatic Ducking Module allows the end user to dial in exactly how much ‘ducking’ of the music is desired. The ST‑GCA3 Gain Control Amplifier insures consistency of level from the paging source. The system uses a 20 watt 70 V amplifier driving two 70 V speakers each tapped at 10 Watts.
AUTOMATIC MESSAGE PLAYBACK WITH PAGING Background Music with Message Repeater and Priority Paging
AUTOMATIC MESSAGE PLAYBACK WITH PAGING
Background Music with Message Repeater and Priority Paging
AN-2143
Description:

An RDL TX‑J2 Unbalanced Input Transformer is used to sum and balance the stereo consumer output from the background music source. The TX‑J2 output is connected to the balanced music input of the FP‑MR2 Message Repeater which ducks the background music during message playback. The message plays at regular intervals set on the front‑panel interval timer DIP switches.

Audio from the FP‑MR2 is connected to Input 2 of the RDL HD‑MA35A Mixer Amplifier. A priority paging microphone is connected to the HD‑MA35A Input 1 which is set to duck signals from all other inputs to the mixer amplifier. The constant voltage output of the mixer amplifier provides 35 W RMS for the connection of 25 V, 70 V or 100 V loudspeakers.

The FP‑MR2 is powered directly from the 24 Vdc output on the rear of the HD‑MA35UA. A computer or any other unbalanced line‑level source may be used to transfer a recorded message to the FP‑MR2.

AUTOMATIC TIMED MESSAGE PLAYBACK Background Music With Message Repeater
AUTOMATIC TIMED MESSAGE PLAYBACK
Background Music With Message Repeater
AN-2142
Description:

The RDL FP‑MR2 Message Repeater stores a single recording up to one minute forty seconds in duration. The message is played back at regular intervals set on the front‑panel interval timer DIP switches.

An RDL TX‑J2 Unbalanced Input Transformer is used to sum and balance the stereo consumer output from the background music source. The TX‑J2 output is connected to the balanced music input of the FP‑MR2. When message playback is triggered, the music is faded down 20 dB or completely off (switch‑selectable on the FP‑MR2). At the conclusion of the message, the normal background music level is restored.

Amplification for 70V loudspeakers is provided by an RDL FP‑PA35A Audio Amplifier with compression. A computer or any other unbalanced line‑level source may be used to transfer a recorded message to the FP‑MR2.

AMPLIFICATION FOR OUTDOOR POLE-MOUNT SPEAKERS Pole Mounted Power Amp Operation in Extreme Temperatures
AMPLIFICATION FOR OUTDOOR POLE-MOUNT SPEAKERS
Pole Mounted Power Amp Operation in Extreme Temperatures
AN-2125
Description:
This outdoor parking area is equipped with speakers mounted in the lamp structures to provide music and paging coverage. Speakers in each pole are powered by an RDL FP‑PA18H 18 Watt Hi‑Temp Audio Amplifier. The amplifier module is mounted in an unventilated watertight enclosure at the base of each pole. The poles recieve direct sunlight causing the potential for high internal ambient air temperatures. The highly efficient FP‑PA18H is ideally suited to this environment. It is designed for operation in ambient temperatures up to 70 degrees Celsius (about 158 degrees Fahrenheit) and contributes negligible heat to the ambient temperature inside the pole. The amplifier’s integral compressor/limiter insures maximum intelligibility by keeping average power levels high and preventing clipping. The FP‑PA18H combines RDL's high audio performance standards with the capability of operation in harsh temperature environments. Notes: 1] If it is desired to monitor the operation of the complete system, the audio detector included in each FP‑PA18H can be wired back to the system audio rack to confirm that audio is being received and amplified at each pole. 2] If the FP‑PA18H is acquired with an RDL power supply, that supply must be located in an ambient environment not to exceed 40 degress C. FP‑PA18H modules are available without a power supply for use with high temperature supplies or in systems using distributed 24 Vdc power. Contact RDL Technical Support for more information.
PRIORITIZED PAGING Automatic Ducking with Multiple Paging Locations
PRIORITIZED PAGING
Automatic Ducking with Multiple Paging Locations
AN-2062
Description:
This application provides multiple paging locations, with priority assigned to each location. Each location has a mic equipped with a PTT (push‑to‑talk) momentary pushbutton. The STM‑2 preamp for each microphone should be installed near the associated mic. Wiring between each STM‑2 output and the corresponding ST‑VP2 is balanced, connected with shielded or unshielded twisted‑pair cable. When any microphone is used, 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.

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.
PAGING DISTRIBUTION IN OFFICE COMPLEX Common Paging for Multi-Story Office Building
PAGING DISTRIBUTION IN OFFICE COMPLEX
Common Paging for Multi-Story Office Building
AN-2108
Description:
Installed UTP (unshielded CAT5, CAT6 or similar) cable can be used to distribute facility‑wide paging to multiple floors or zones. The facility paging source for this multiple story building is fed to the RDL TX‑TPS1A Active Single Pair Sender. Its output is fed to a twisted pair receiver on one floor, then in turn to additional receivers on the other floors. All connections use UTP terminated with RJ45 plugs. A TX‑TPR1A Active Single Pair Receiver on each floor delivers line‑level paging audio to the local amplifier. Each Format A twisted pair receiver bridges the UTP cable, allowing the source signal to continue on to multiple receivers. The receivers are powered from the TX‑TPS1A sender. (Note: If the total distances between the receivers exceeds the recommended cable length for the cable type used, one or more additional power supplies may be required. If needed, an additional power supply may be connected to any of the receiver modules. Consult the Format‑A twisted pair data, or RDL technical support for more information.)
DISTRIBUTED OUTDOOR SOUND User Audio Input And Level Control
DISTRIBUTED OUTDOOR SOUND
User Audio Input And Level Control
AN-2031
Description:
An unbalanced stereo audio signal (RCA jacks or Mini‑jack) from an external source (MP3 shown) is summed and converted to balanced mono using the DS‑CIJ3 Consumer Input Jack plate. An RDL FP‑PA20A 20 Watt Audio Power Amplifier feeds 70 Volt outdoor loudspeakers in the patio seating area. The wall‑mounted RLC10KS Remote Control allows users to adjust the audio level on the patio. The RLC10KS controls the ST‑VCA3 Voltage Controlled Amplifier which sets the audio input level to the power amplifier. An FP‑PA20B 20 Watt 25 Volt Power Amplifier may be used in place of the FP‑PA20A if a 25 Volt system is desired.
DISTRIBUTED OUTDOOR SOUND User Audio Input Automatically Overrides House Audio in Local Zone
DISTRIBUTED OUTDOOR SOUND
User Audio Input Automatically Overrides House Audio in Local Zone
AN-2032
Description:
An unbalanced stereo audio signal from the house audio system is summed and converted to a balanced mono signal using the TX‑J2 Unbalanced Input Transformer. The ST‑ACR Audio Controlled Relay normally connects the house audio source to the FP‑PA20A 20 Watt Audio Power Amplifier which feeds 70 Volt outdoor loudspeakers in the patio seating area. The patio is equipped with a DS‑CIJ3 Consumer Input Jack plate to connect an unbalanced stereo audio source (RCA jacks or Mini‑jack, MP3 shown). When a source is connected and playing audio, the ST‑ACR2 detects the audio and switches the amplifier input from house audio to the connected source. The patio speakers will distribute the locally connected source as long as it is playing. When the local source is finished, the ST‑ACR2 switches back to the house audio. An FP‑PA20B 20 Watt 25 Volt Power Amplifier may be used in place of the FP‑PA20A if a 25 Volt system is desired.
STEREO REMOTE AUDIO LEVEL CONTROL Studio Quality Volume Adjustment for Professional and Consumer Applications
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.
BACKGROUND MUSIC WITH MICROPHONE PAGING Simple Retail Space BGM System with Dual Microphone Paging
BACKGROUND MUSIC WITH MICROPHONE PAGING
Simple Retail Space BGM System with Dual Microphone Paging
AN-2135
Description:
In this application, an RDL HD‑MA35U 35 Watt Mixer Amplifier is used for background music and microphone paging. An RDL STD‑150 Passive Audio Combiner/Divider ‑ 150Ω combines signals from 2 dynamic or condenser microphones and feeds the paging input of the mixer amplifier. A background music source is inserted into any line‑level input. The Mixer Amplifier can be set to fade down (duck) the background music during a paging event. Automatic ducking is enabled usng the ducking selectors, sensitivity and release delay adjustments on the rear panel. An RDL RLC10K Remote Level Control is provided to adjust the output level of the amplifier. This remote control is designed to be mounted in a standard US single gang electrical box (or RDL WB‑1U Universal Wall Box for international installations) with an RDL CP‑1 Cover Plate. Bass and Treble tone controls are provided on the amplifier front panel.
ADDING A ZONE TO AN EXISTING DISTRIBUTED 70 V SYSTEM
ADDING A ZONE TO AN EXISTING DISTRIBUTED 70 V SYSTEM
AN-2025
Description:
A 70 V audio signal is being distributed to multiple zones in a facility. The RDL TX‑70A provides for the expansion of the existing 70 V system by converting the 70 V signal to an unbalanced line level signal. The unbalanced audio signal feeds the FP‑PA20A 20 Watt 70 V Audio Power Amplifier, which powers the speakers in the additional zone. The TX‑70A is equipped with a level trimmer for achieving optimal signal level.
AUTOMATIC POWER CONTROL OF RETAIL AUDIO SYSTEM Conserve Energy and Save Cost by Automating System Power-Up and Power-Down
AUTOMATIC POWER CONTROL OF RETAIL AUDIO SYSTEM
Conserve Energy and Save Cost by Automating System Power-Up and Power-Down
AN-2109
Description:
To conserve energy and reduce operating costs, the RDL FP‑ECC1 Energy Conservation Controller is used to automatically power up the background music system in this retail store when needed and to power down the equipment when not needed. A magnetic switch on the door is used as a trigger to switch the system on. Once on, an occupancy sensor (motion detector) is used to monitor activity in the space and hold the system in a powered state. After a switch‑selectable time period of 15, 30 or 60 minutes of no activity (motion), the FP‑ECC1 will turn the BGM system off. No operator intervention is required to power the system on or off. A TX‑J2 is used to provide a balanced mono sum of the background music receiver output. The D‑ECR1L Power On/Off and Level Control Remote allows for manual power‑up/down operation of equipment controlled by the FP‑ECC1 and provides a convenient remote volume control for the RU‑PA40D 40 Watt Stereo Power Amplifier. Notes: 1] A larger audio amplifier may be used in larger systems; 2] If the RU‑PA40D is located with the BGM receiver, the TX‑J2 is not required.
BASIC BACKGROUND MUSIC Simple Retail Space BGM System
BASIC BACKGROUND MUSIC
Simple Retail Space BGM System
AN-2134
Description:
The RDL HD‑PA35U 35 Watt Power Amplifier is equipped with a single unbalanced stereo summing input for connecting a background music source. This amplifier includes an analog compressor/limiter allowing it to produce clear audio output levels that normally require an amplifier with a much higher output power rating. The HD‑PA35U shuts down (standby “sleep” mode) when audio is absent and automatically turns on when needed. In this application, an RDL RLC10K Remote Level Control is provided to adjust the output level of the amplifier. This remote control is designed to be mounted in a standard US single gang electrical box (or RDL WB‑1U Universal Wall Box for international installations) with an RDL CP‑1 Cover Plate. Bass and Treble tone controls are provided on the amplifier front panel.
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