LRAD 1950XL EQUIPMENT MANUAL - portal.genasys.com

LRAD 1950XL EQUIPMENT MANUAL

Genasys Inc. 16262 West Bernardo Drive

San Diego, CA 92127 www.genasys.com

Catalog: LRAD-1950XL-MAN Manual Part No.: 114931-00 rev. B

Revised 13 Jul. 2020 Copyright, 2020, Genasys Inc.

LRAD 1950XL GENASYS INC.

ii

Contents

Contents ..................................................................................................................................... ii 1.0 Safety Precautions ................................................................................................................4

2.0 Introduction .........................................................................................................................6

3.0 Preparation for Use and Installation .....................................................................................6

3.1 Parts List ...........................................................................................................................6

3.2 Quick Setup Guide ...........................................................................................................10

4.0 Principles of Operation .......................................................................................................11

5.0 Operating Instructions ........................................................................................................11

5.1 Positioning the LRAD for Operation ................................................................................12

5.2 Aiming ............................................................................................................................13

5.3 Environmental Conditions Affecting Aiming ....................................................................13

5.4 System Interfaces ...........................................................................................................14

5.4.1 Main AC Power Switch .............................................................................................14

5.4.2 Electronics Panel Indicator LEDS ..............................................................................14

5.4.3 AC Input Connector ..................................................................................................15

5.4.4 Resettable Breaker...................................................................................................15

5.4.5 MP3 Control Unit Indicator LEDs ..............................................................................15

5.4.6 Voice Boost Switch ...................................................................................................16

5.4.7 Microphone Clip ......................................................................................................16

5.4.8 Sound Projection Switch ..........................................................................................16

5.4.9 MIC/USB Input .........................................................................................................16

5.4.10 Power/Volume Control ..........................................................................................17

5.4.11 Control Unit Connector ..........................................................................................17

5.4.12 Power On Hours Meter ..........................................................................................17

5.4.13 MP3 Player Control Buttons ....................................................................................17

5.5 Using the MP3 Player......................................................................................................18

5.6 Button Functions ............................................................................................................19

5.7 MP3 Control Unit LCD Display ..........................................................................................20

5.8 Downloading Files...........................................................................................................21

5.9 Changing the Alert Tone .................................................................................................22

5.10 Audio File Playback .......................................................................................................22

5.11 Using the Alert Tone .....................................................................................................22

5.12 Other MP3 Player Features ...........................................................................................22

6.0 The Recording Microphone ................................................................................................22

7.0 Maintenance, Troubleshooting and Servicing .....................................................................24

7.1 Preventive Maintenance .................................................................................................24

7.2 Fresh Water Rinse...........................................................................................................25

7.3 Cleaning the Head Unit Grill ............................................................................................25

7.4 Troubleshooting .............................................................................................................25

8.0 Preparation for Shipment ...................................................................................................27

9.0 Storage ...............................................................................................................................27


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10.0 Specifications ...................................................................................................................28

11.0 Technical Support .............................................................................................................29


Manual Part No.:114931-00 rev. B 4

1.0 Safety Precautions

The LRAD 1950XL is capable of producing sound pressure levels that have the potential to cause temporary or permanent hearing damage if not used properly. Always follow the safety precautions described in this manual as well as on the unit’s operator interfaces. The following conventions apply in this manual. Please note the warnings and take adequate measures to ensure safe operation of the unit. WARNING – Risk of injury or death. CAUTION – Risk of equipment damage. Before operating the LRAD 1950XL, do the following: 1. Read these instructions.2. Keep these instructions in a place known to and accessible by the potential operators of the

LRAD 1950XL.3. Heed all warnings contained in this document.4. Follow all instructions detailed in this document.5. Install in accordance with the instructions contained in this document.6. Do not install near any heat sources such as radiators, heat registers, stoves, or other

apparatus that produce heat.7. Do not connect or disconnect any cables to the unit while the primary circuit is live unless

the area is known to be non-hazardous.8. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug

has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong.

9. The wide blade or the third prong of the power cord is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

10. Protect the power cord from being treaded upon, excessively bent, creased, or pinched particularly at the point where the cable assemblies connect to the apparatus.

11. Only use attachments/accessories specified by themanufacturer.

12. Unplug this apparatus during lightning storms or when unused for long periods of time.

13. Refer all servicing to qualified service personnel. Servicing is required when the LRAD 1950XL has been noticeably or substantially damaged in any way, including cord or plug damage, seriously dented or breached housings, or if liquid has penetrated the interior of the device, or any accessories.

14. The LRAD 1950XL power cord shall be connected to a main socket outlet with a protective ground connection.

15. Follow the Operation Zones graphic on the back of the LRAD for guidance on exposure to high acoustic levels.

Figure 1: LRAD 1950XL Safe Zones

100m

800m

15m

10m



The following information refers to Figure 1: a. SPL can exceed 115dB within the indicated red areas at full power. Do not enter

these areas during operation.b. SPL can exceed 100dB within the indicated yellow areas at full power. These

areas are safe for up to 15 minutes with hearing protection.c. SPL is below 100dB in the green zone. This area is safe to enter without hearing

protection for up to 15 minutes.



2.0 Introduction

The LRAD 1950XL Long Range Acoustic Device is a powerful acoustic hailer that can be used to project loud, clearly intelligible messages to targets at distances up to 5 Kilometers (3.1 miles). The acoustic output from the LRAD projects from the Acoustic Array in a focused 30 degree “cone” of sound. Sound levels outside of this cone are greatly reduced as a result of the focused nature of the LRAD’s sound projection.

The LRAD includes a ruggedized MP3 player unit that can be used to store digital audio of any type, as well as a handheld microphone for reproducing live spoken messages. The LRAD’s MP3 player features a built in “Alert Tone” button that instantly broadcasts a loud, piercing alert sound that can be used to gain the target’s attention.

The LRAD 1950XL has the ability to produce a maximum continuous sound pressure level (SPL) of 155dB at one meter from the front of the device. With this high output, clear audible messages can be broadcast to targets at ranges of 1600 to 5000 meters, depending on weather conditions. This high acoustic output is achieved with a peak power consumption of 1120 Watts.

The LRAD operates using AC input power from a 90 to 260 VAC power source at 50 or 60Hz. The LRAD must be plugged into a grounded electrical outlet.

The LRAD is constructed of materials that are designed to survive in a marine environment with proper care and maintenance. A carbon-fiber speaker housing is fitted with 316 stainless steel hardware and other parts that are either powdercoated or hard anodized. The remote portable amplifier pack and remote MP3 control unit are environmentally sealed and can be used in all weather conditions. For further information on environmental specifications for this product, see the Specifications section of this manual.

3.0 Preparation for Use and Installation

3.1 Parts List

The LRAD 1950XL system components ship in reusable crates. The provided crates should be stored and used whenever shipping or transporting the LRAD. The following table lists the various parts that are included with the purchase of the LRAD 1950XL.



Table 1: LRAD-1950XL Parts List

Part Number Description Image

112376-02 ASSEMBLY, HEAD UNIT, LRAD 1950XL, GROUNDED, GRAY

114379-02 ASSEMBLY, YOKE, 1000X, 1950XL, LOCKING TILT,

1-1/8’ STUD, GRAY

112381-00 ASSEMBLY, AMP PACK, LRAD-1950XL, DUAL DIA WIRING

107266-00 CABLE ASSEMBLY, USB 2.0, DOWNLOAD, MP3,

D38999, 48 IN



107906-12 CONTROL UNIT, REMOTE ELECTRONICS, UNIVERSAL,

GRAY, SS

115394-00 MICROPHONE, RECORDING, NOISE CANCELLING ELEMENT,

METAL BUTTONS, SS

101562-02 ASSEMBLY, POWER CABLE, GROUND-FIRST, STRAIGHT

PLUG, 50 FT

101562-01 ASSEMBLY, POWER CABLE, GROUND-FIRST, STRAIGHT

PLUG, 12 FT

109403-35 CABLE, AMPLIFIER PACK TO HEAD UNIT, 35FT, LRAD-2000X

107920-00

CABLE ASSEMBLY, REMOTE CONTROL, 20 FT, SS

106584-00 CABLE ASSEMBLY, CD PLAYER, D38999 TO 3.5MM PHONE, SS



114931-00 MANUAL, LRAD 1950XL, PRINTED, LAMINATED

108089-00 KIT, DUAL TILT LOCK KNOBS, LRAD-1000Xi

104873-00 HANDLE, LRAD-1OOOX, REMOVABLE (QTY. 2)

100770-00 EARPLUG, FOAM, W/O CORD, NRR 33 DB, (QTY. 10)

100778-00 EARPLUG, BANDED, NRR 25 DB, (QTY. 2)

107767-02 COVER, SOFT, LRAD-1000X, GRAY



104758-00 PACKAGING, CRATE, LRAD-1000X

3.2 Quick Setup Guide

The LRAD 1950XL can be quickly set up for use by following these basic steps. Reference the pictorial parts list in the previous section to identify the parts mentioned below.

AC

outlet

1. Install the mounting yoke in an appropriate mounting system. LRAD offers variousmounting options.

2. Place the rubber washers from the tilt lock knob kit over the tilt axis studs so they areflush with the tilt axis flanges.

3. Lower the head unit onto the yoke, inserting the studs into the vertical slots in the yoke.4. Screw the tilt lock knobs onto the tilt axis studs and tighten.5. Install the removable handles on the back of the head unit.6. Open the lid of the amp pack.7. Connect either the 50 foot or 12 foot AC power cord and connect to an AC power outlet.8. Connect the 35 foot amp pack to head unit cable.9. Connect the 20 foot remote control cord to the amp pack and to the MP3 control

module.10. Connect the microphone to the control module.

WARNING: Always wear hearing protection when operating the LRAD.



4.0 Principles of Operation

The LRAD 1950XL uses an array of high efficiency acoustic transducers to produce a focused pattern of sound that can be aimed at a target for transmission of audible commands, warnings, and alert signals. The LRAD’s focusing effect produces a sound pattern that has its highest intensity directly in front of the device in a ‘cone’ of approximately 30 degrees. Outside of this 30 degree cone, the sound intensity drops dramatically. It is through this focusing of the sound beam that the LRAD is able to broadcast clear and intelligible audible messages thousands of meters.

The LRAD can broadcast audible content from the included MP3 Control Unit or from the handheld microphone. Audio from these devices is processed and amplified by a number of discrete class “D” digital amplifiers and the amplified analog audio signal is reproduced by the high efficiency, lightweight acoustic drivers in the LRAD’s Head Unit.

Rules of Engagement with the LRAD 1950XL will vary with each end user’s installation.

5.0 Operating Instructions

The following instructions offer a brief overview of the operation of the LRAD once it has been mounted, connected, and powered up.

1. Operators of the LRAD must wear hearing protection with 20 to 33 dB of attenuationwhen using the LRAD. The foam earplugs provided with the LRAD meet theserequirements.

WARNING!

AVOID PROLONGED EXPOSURE TO EXCESSIVE NOISE LEVELS.

TEMPORARY OR PERMANENT LOSS OR DEGRADATION OF HEARING CAN OCCUR.

HEARING PROTECTION IS REQUIRED WHEN OPERATING THE LRAD.

2. Aim the LRAD at the desired target using either of the integrated sighting mechanismsprovided on the sides of the unit. Center the crosshairs in the rear hole of the sight toensure proper alignment of the LRAD to the target. Use the handles at the rear of theLRAD to move the LRAD left/right or up/down to the desired position. Adjust thefriction by tightening/loosening the tilt lock knobs or the lock on the mount.



Target

Use alignment sight on

either side of the LRAD to

aim the acoustic beam on

target

Figure 2: Using the Sights

3. Adjust the volume control on the LRAD MP3 Control Unit to a medium setting (yellow orgreen). Ensure that the Voice Boost switch is set to OFF.

4. Select and play the desired audio track on the MP3 Control Unit OR key the microphoneto broadcast live speech. Adjust the volume, Output Power and Voice Boost settingsuntil you reach the desired volume level and are able to communicate with your target.

5.1 Positioning the LRAD for Operation

Many factors must be considered when positioning the LRAD 1950XL for hailing and warning operations. The LRAD 1950XL Operations Zones shown in Figure 1 must always be taken into account to ensure that personnel are not exposed to excessive sound pressure levels. Factors to consider when placing the LRAD 1950XL include, but are not limited to, the following:

• All long-range communication devices should have an unobstructed transmission path to the anticipated areas in which it will be aimed. Even small mast antennas may reflect some sound energy decreasing the effectiveness of the unit as well as increasing reflected noise levels for the operator and others nearby.

• Placement should be chosen so as to minimize or avoid transmission over decks or balconies where personnel may be located.

• Shipboard operations should place the LRAD 1950XL as close to the ship’s sides, bow, or stern as possible.



• When choosing a placement area to maximize unobstructed transmission path(s), care must be taken to ensure the LRAD 1950XL does not collide with any structures or equipment, nor encroach on personnel passageways when the unit is pivoted and manipulated through its full range of motion.

The LRAD 1950XL’s MP3 Control Unit and Microphone can be placed away from the Head Unit for operation by a second person. The system ships with a standard control unit cable. For pricing and delivery information on alternate cable lengths, please contact your Genasys sales representative.

5.2 Aiming

The LRAD 1950XL can be accurately aimed at the vehicle or personnel the operator is attempting to communicate with using one of the four attached visual sighting devices. The sights are located on the left and right sides of the LRAD 1950XL. The operator simply looks through the hole on the sight and aligns the target in the cross hairs.

NOTE: The LRAD 1950XL audio transmission is very directional. It may be necessary to make aiming corrections for strong crosswinds when communicating over long distances.

5.3 Environmental Conditions Affecting Aiming

At distances of 1000 meters or more, some environmental conditions will begin to have an impact on the clarity and volume of sound delivered to a target. These are some of the factors that will affect the LRAD’s ability to project clear audio to distances beyond 1000 meters.

• Temperature Gradients – Temperature gradients can behave like lenses to the acousticoutput of the LRAD, causing the acoustic beam to deflect and weaken. Temperaturegradients can be caused by varying terrain surfaces like blacktop, grass, water and byconditions such as shade and wind. Improved ranges can be achieved whenbroadcasting over a surface that has a consistent temperature, such as water, asopposed to broadcasting over terrain that may have large temperature variations, suchas a blacktop road being heated by the sun.

• Moisture and Humidity – Moisture and humidity in the air, such as fog or light rain, willhave a very small effect on the range of the LRAD. Also, moisture does tend to aggravatethe effects of wind on the range of the LRAD.

• Winds – High winds may cause the LRAD’s sound beam to shift, making it difficult to aimat long distances. Noting that the sound from the LRAD will take around 3 seconds toreach a target at 1000 meters, the user should attempt to compensate for this as well asfor any effects of cross winds.

• Noise Levels at the Target’s Position – High winds, engine noise, and other backgroundnoises will have to be overcome by the LRAD in order for the target to clearly hear andunderstand the LRAD. Targets that are indoors or protected by a barrier will not be ableto hear the LRAD as clearly as those who are out in the environment.



5.4 System Interfaces

The following illustration denotes the interfaces of LRAD’s Amplifier and MP3 Control Unit. Each feature is discussed in the following sections.

Figure 3: LRAD 1950XL Interfaces

5.4.1 Main AC Power Switch

This is an environmentally sealed single-throw double pole switch that connects and disconnects both the primary and neutral AC input lines to turn the unit on and off.

5.4.2 Electronics Panel Indicator LEDS

Power: LED illuminates in green when main power switch is on and AC is present.

Clipping: LED illuminates in yellow when input signal is too high. Excessive input signal level will cause distortion on the output and may damage the amplifier if applied continuously. When using the microphone, this means that the operator is shouting too loudly into the microphone and should adjust their voice level or the position of the microphone with respect to their mouth. When using an external audio device such as a CD player, this means that the output volume on the CD player is set too high and should be turned down until the Clipping LED no longer illuminates. The Clipping LED will not illuminate when using the LRAD’s Control Unit unless there is a malfunction in the Control Unit or the LRAD’s preamp.

CONTROL UNIT

CONNECTOR

POWER ON HOURS

METER

MAIN A/C

POWER SWITCHA/C INPUT

CONNECTOR

RESETTABLE

BREAKER

MIC/USB INPUT

MIC CLIP

MP3 CONTROL UNIT

INDICATOR LEDS

VOICE BOOST

SWITCH

POWER/VOLUME CONTROL

SOUND PROJECTION

SWITCH

MP3 CONTROL

UNIT DISPLAY LCD

PLAY/PAUSE

STOP

SKIP FWD.

SKIP REV.

BACKLIGHT

REPEAT MODE

ALERT TONE



Fault: LED illuminates in red when amplifiers have reported a general fault (over-temperature, over-current, or other) and have shut down or failed. Recycling the power may clear some types of faults. An over-temperature fault will clear after allowing the system to cool down.

5.4.3 AC Input Connector

The AC Power Input connector accepts 90 to 260 VAC from a 50 or 60 Hz supply. The AC is converted into 24VDC and fed to the LRAD’s amplifiers to power the unit. The connector provided is of the designation:

Amphenol DL series DL3102A18-10P

This connector provides four #12 pin contacts with a pre-earth/first mate last break protective ground circuit. The following figure shows the pinout for this connector: Pin A: AC Primary Line (BROWN WIRE) Pin B: Not Connected Pin C: Neutral Line (BLUE WIRE) Pin D: Earth Ground (GREEN/YELLOW WIRE)

5.4.4 Resettable Breaker

In the event of an internal electrical failure or short circuit, the resettable breaker will trip, disconnecting power to the unit for safety.

5.4.5 MP3 Control Unit Indicator LEDs

Power: LED illuminates in green when Volume/Power control is on and amplifiers have been powered up.

Clipping: LED illuminates in yellow when input signal is too high. Excessive input signal level will cause distortion on the output and may damage the amplifier if applied continuously. When using the microphone, this means that the operator is shouting too loudly into the microphone and should adjust their voice level or the position of the microphone with respect to their mouth. When using an external audio device such as a CD player, this means that the output volume on the CD player is set too high and should be turned down until the Clipping LED no longer illuminates. The Clipping LED will not illuminate when using the LRAD’s Control Unit unless there is a malfunction in the Control Unit or the LRAD’s preamp.

Fault: LED illuminates in red when amplifiers have reported a general fault (over- temperature, over-current, or other) and have shut down or failed. Recycling the power may clear some types of faults. An over-temperature fault will clear after allowing the system to cool down.

Figure 4: AC Input Connector Pinout



5.4.6 Voice Boost Switch

The LRAD features a Voice Boost switch which gives the LRAD greater range and intelligibility when broadcasting spoken voice recordings. When Voice Boost is ON, the total power level of the voice broadcast is increased by a significant factor. The signal processing enabled by the Voice Boost switch will also slightly distort the voice broadcast. This processing has shown to improve the intelligibility of the LRAD over long distances.

Voice boost is not recommended for use with the Microphone as it will increase the sensitivity of the Microphone and make the system prone to producing feedback. However, in some installations, when the microphone is sufficiently distant and acoustically isolated from the LRAD, the Voice Boost switch may be used. See the “Using the Microphone” section of this manual for further information on feedback.

5.4.7 Microphone Clip

This clip is provided for attaching the microphone when not in use.

5.4.8 Sound Projection Switch

Enables high pass filtering to reduce the overall beam spread of the projected sound from the LRAD. Select the narrow setting where nearby buildings or structures may cause reverberations. This will ensure that the target hears the communication more clearly and will reduce distortion caused by acoustic reflections from nearby structures. Select the wide setting to broadcast with a wider coverage area in an open environment, such as the open ocean.

5.4.9 MIC/USB Input

The microphone input/USB connector is provided for connection with the handheld microphone, an external audio device or for connecting to a USB enabled computer for the purpose of downloading audio files. The connector provided is of the following MIL-38999 Type III designation:

D38999/24KB35S

This connector provides thirteen #22 socket contacts. The following figure shows the pinout for this connector:

Pin 1: +5.2 VDC Out (provides power to another LRAD MP3 Player for daisy-chaining). Pin 2: Analog Audio Input Signal + Pin 3: Analog Audio Input Signal - Pin 4: Audio ground Pin 5: Not used Pin 6: Mic Pin 7: Mic GND Pin 8: Not used Pin 9: Not used Figure 5: Mic/USB Connector

Pinout



Pin 10: +5VDC input Pin 11: USB - Pin 12: USB + Pin 13: USB GND Note: Audio Input signal level is not to exceed 280mV RMS.

5.4.10 Power/Volume Control

The volume control knob allows the user to power on the amplifiers and to adjust the intensity or loudness of the acoustic output from the LRAD. Always start broadcasting at a low volume setting and adjust the volume up as conditions allow.

5.4.11 Control Unit Connector

The MP3 Control Unit input connector is provided for connection with the LRAD’s remote MP3 Control Unit. This connection accepts line-level audio in, control signals and provides power to the MP3 player. The connector provided is of the following MIL-38999 Type III designation:

D38999/24KB35S

This connector provides thirteen #22 socket contacts. The following figure shows the pinout for this connector:

Pin 1: Not Used Pin 2: Analog Audio Input Signal + Pin 3: Analog Audio Input Signal - Pin 4: DC ground Pin 5: Drain wire Pin 6: Not used Pin 7: Not used Pin 8: +12-24 VDC out Pin 9: +10 VDC in to relay Pin 10: Not Used Pin 11: Not Used Pin 12: Not Used Pin 13: Not Used Note: Audio Input signal level is not to exceed 280 mV RMS.

5.4.12 Power On Hours Meter

This meter displays the total number of hours that the amplifier module has been powered on.

5.4.13 MP3 Player Control Buttons

Button functions are detailed in section 5.6 of this manual.

Figure 6: LRAD Control Interface Pinout



5.5 Using the MP3 Player

The use of prerecorded messages is recommended whenever possible. Prerecording ensures that messages are appropriately worded and clearly broadcast to maximize the effectiveness of communications.

The LRAD 1950XL is supplied with a case-hardened MP3 player. This MP3 player allows operators to utilize approved prerecorded messages in the field. Some operators have found it useful to record a message in several different languages to meet their communication needs.

The MP3 player is preloaded with a number of warning and test messages that may be freely used or deleted as needed.

A sealed, ruggedized package houses an MP3 player unit capable of playing back audio in MP3, WAV and WMA formats.



5.6 Button Functions

The MP3 Control Unit’s buttons are environmentally sealed, backlit and are large enough for ease of operation with gloved hands.

The buttons are used to cycle through the available audio tracks, put the MP3 player into PLAY, PAUSE and STOP states, to control the backlight intensity of the buttons and the display, to toggle repeat mode, and to instantly toggle the LRAD’s high intensity Alert Tone. The following table summarizes each button’s functions.

Table 2: MP3 Player Button Functions



5.7 MP3 Control Unit LCD Display

The LCD display gives status and operating mode information to the user.

STATUS

FILE TYPE REPEAT MODE

TIME ELAPSED

AUDIO FILE NAME

Figure 7: MP3 Player Display

Status: The MP3 player status will read one of the following:

• PLAY – The selected file is under playback and should be heard through the LRADdepending on the LRAD’s volume setting.

• PAUSE – The selected file is paused and will resume playback when the pause/playbutton is pressed from the point in the file at which it was paused.

• STOP – The selected file is stopped and will resume playback when the pause/playbutton is pressed from the beginning of the file.

• ALERT – The LRAD Alert tone is being played and should be heard through the LRADdepending on the LRAD’s volume setting.

• ERROR – The MP3 player’s onboard memory is not formatted.

File Type: The display will read “MP3”, “WAV” or “WMA”, depending on the recording format of the digital media file selected.

Repeat Mode: The character “R” will be displayed here if the MP3 player is in repeat mode. In repeat mode, the selected file will play to the end and then automatically play again from the beginning in a continuous fashion until the stop button is pressed or until the player is taken out of repeat mode and the file plays to completion.

Time Elapsed: Displays the current playback time of the selected file. This counter resets when the file restarts in repeat mode.

Audio File Name: Displays the file name of the audio file selected. If the file name is too long to fit in the width of the display, the file name will continuously scroll right to left.



Upon first powering up, the MP3 player will display a splash screen indicating the current firmware version. To check the current firmware version, cycle the connection between the MP3 player and the LRAD and make a note of the splash screen.

Figure 8: MP3 Player Splash Screen

5.8 Downloading Files

In order to load additional audio files to the MP3 player, it must be connected to the USB port of a USB enabled computer.

First connect the USB download cable to the MIC/USB connector on the MP3 player, then connect the USB plug into the computer.

NOTE: Not following this order may cause the MP3 player to not be recognized by the computer. The MIL style connector on the MP3 player does not allow for a ground-first connection per the USB standard. By connecting the MIL style connector to the MP3 player first, the standard USB connector will then be allowed to establish a proper connection to the computer.

After connecting the MP3 player’s USB interface to the computer, the following will be displayed on the MP3 player after the initial splash screen:

Figure 9: MP3 Player Mass Storage Screen

The computer will automatically install USB mass storage drivers and will display two new “Removable Mass Storage” devices in the file management interface. The first installed drive will not be accessible, as this drive is reserved for system memory and is locked. The second installed drive is available to read and write files. Just drag and drop the files you need.



NOTE: If you would like the files on the MP3 player to be displayed in a certain order, simply drag each file, one by one, onto the MP3 player’s storage device. The skip buttons on the MP3 player will then display the files in the order in which they were copied to the device.

5.9 Changing the Alert Tone

The MP3 player contains a file named “ALERT.ATC”. This file will be played back whenever the Alert button on the side of the MP3 player is toggled. You may replace this file with any recording you like. Save the desired recording with the name “ALERT.ATC” and copy it to the MP3 player. This new file will now be tied to the Alert button and will play automatically when the Alert button is pressed.

5.10 Audio File Playback

1. Stop inputs from other audio input devices such as the microphone or an externaldevice.

2. Select the desired track with the Next File or Previous File buttons.3. Press PLAY to play the file.

5.11 Using the Alert Tone

The Alert Tone button located on the side of the MP3 player will activate a pre-recorded Alert sound. Press once for activation, press again for deactivation. The pre-installed Alert Tone is an intense, pulsating warning tone that is designed to be clearly heard at long distances.

Genasys Inc. recommends using the tone in 2-5 second bursts for maximum effectiveness when hailing a subject. Pressing the Alert Tone button will interrupt the recorded voice transmission.

• WARNING: The Tone Generator produces the loudest output from the LRAD 1950XL. Qualified personnel must ensure the area in front of the LRAD 1950XL is clear for 100 meters in front of the device before activating the tone in MAXIMUM mode.

5.12 Other MP3 Player Features

The LRAD MP3 Player features a brightness level button that will cycle the button and LCD brightness through 3 levels, including off. This is useful in compensating for glare and to avoid light signature when necessary.

6.0 The Recording Microphone

The LRAD 1950XL is provided with a recording microphone. This microphone features an integrated digital recording chip that can store approximately one minute of audio. This feature is extremely useful in situations in which a message needs to be recorded quickly for repeated continuous use, or where feedback cannot be avoided when talking through the microphone.



About microphone feedback: Microphone feedback is caused when the microphone picks up output from the LRAD, causing a loud harmonic hum through the device. Placing the microphone directly in the sound projection path of the LRAD and keying the ‘Push to Talk’ Button would result in the worst-case feedback scenario. This is because the sound being produced by the LRAD is being fed back into itself, causing a reverberation that amplifies certain frequencies, resulting in a loud screech or squeal from the device. The LRAD’s focused sound pattern allows for use of the microphone when standing behind the LRAD, where the sound from the LRAD is greatly reduced, however, there are some operational conditions that will inevitably cause feedback.

How to Limit Feedback:

• Adjust the volume: Lower the volume level of the LRAD until feedback is negated.

• Avoid reflections: If the output from the LRAD is bouncing off of a solid object such as abuilding and making its way back to the microphone, feedback will occur. Tryrepositioning the LRAD or the microphone to prevent the LRAD’s output from feedingback through the microphone.

• Maintain your distance: The farther away the microphone is from the LRAD, the lessfeedback you will experience. Only use the microphone behind the LRAD and keep itout of the main acoustic beam.

• Shield the microphone: If you can shield the microphone operator from the LRAD’sacoustic output, the microphone feedback will be reduced. Stand behind a physicalbarrier or inside a guard house or ship’s bridge. You may also use your free hand tocover the area surrounding the microphone to attempt to limit feedback.

• Use the push to talk button to your advantage: Releasing the PTT button on themicrophone immediately after speaking will limit feedback. Leaving the PTT buttondepressed will allow feedback to go through

In the event that a maximum power broadcast of a verbally spoken message is needed, the handheld microphone can be used to record, store and playback a message of approximately one minute in duration.

To record and play back using the recording microphone, reference the following figure and take the following steps:

• Press and hold the Record button (2).

• While holding the Record button, press and hold the Play button (3).

• The recording/playback indicator LED(4) will light green while the unit isrecording.

• The unit will record as long as the Record and Play buttons are held down and aslong as there is storage space in the internal memory.

• Speak your message into the microphone element (5) and release the Recordand Play buttons when done speaking.



• Press and release the Play button to initiate playback of the recording. Therecording/playback indicator LED will flash once when the recording has finishedplayback.

• Press and release the Play button again to halt playback of the recording.

• The recording will be stored on non-volatile memory, so the recording willpersist even after the LRAD is powered down.

• Repeating this record sequence will overwrite the recording on the microphone.

• The microphone will only store one recording at a time.

Figure 10: Recording Microphone Features and Controls

7.0 Maintenance, Troubleshooting and Servicing

7.1 Preventive Maintenance

The LRAD-1950XL requires minimal preventive maintenance. As the LRAD is an acoustic device, its acoustic elements must be in contact with the surrounding air in order to emit sound. While these elements are somewhat environmentally protected by the screen, it is best to keep the head unit covered when not in use. This will prevent moisture, salt, and dust buildup on the screen and will protect the unit from exposure to the elements.

Store the LRAD 1950XL inside of its shipping container when storing the system between uses.

PUSH TO TALK (PTT)

RECORD (REC)

PLAY

RECORDING/

PLAYBACK INDICATOR

LED

MICROPHONE

ELEMENT

1

2

3

4

5



7.2 Fresh Water Rinse

All connectors as well as all surfaces exposed to salt spray and/or dust should be rinsed periodically with fresh water, depending on the usage conditions. Recommended rinse-down frequency is weekly for shipboard installations.

In extremely corrosive environments, a lubricant may be applied to the connectors to repel water.

7.3 Cleaning the Head Unit Grill

The Head Unit Grill provides a partial barrier for the acoustic drivers in the head unit from dust, water and other elements, while allowing sound to pass through. Any blockage of this grill material may affect the acoustic performance of the LRAD.

If there is dust, mud, or other material buildup in the grill, it can be rinsed off with fresh water and a brush. Allow the LRAD’s Head Unit to rest with the grill facing down to let any moisture that has built up behind the grill during washing drain out.

7.4 Troubleshooting

7.4.1 Symptom: No green power LED on electronics panel after turning on the main power switch.

The green power LED indicates that the internal 48 VDC power supply has powered up and is ready to provide power to the amplifiers. If this LED is not lit, the internal AC to DC power supply has not powered up and is not producing any 48 VDC output.

• Check the electrical connection to the AC outlet to ensure that AC power is present andconnected.

• Check the operation of the hours meter. The hours meter operates on 48 VDC from thissupply and would indicate a failed power supply if it was not operational.

If none of these measures correct the problem, then the amplifier module will need to be replaced.

7.4.2 Symptom: Red fault LED is illuminated and there is low or no sound coming from the LRAD.

The red fault LED indicates that there is a general fault in one of the amplifiers. This could be a result of overheating, a shorted output, an over or under-voltage on the input to the amplifier’s power supply, or an amplifier failure. Some of these faults will self-heal. For example, an over-temperature fault will cause the amplifier to shut down until the temperature is back to normal. A fault caused by a shorted output will be cleared when the short is removed.



• Power down the Amplifier Module for ten to fifteen minutes and power on again to seeif a temporary fault will be cleared.

7.4.3 Symptom: Clipping LED is illuminated on Amplifier Module.

The clipping LED illuminates when the input signal from the microphone or MP3 player is too high. As a result of this excess signal, the output from the LRAD will sound distorted and if the LRAD is operated for long periods of time while clipping, permanent damage may occur to one or more of the drivers.

• If clipping is occurring when using the microphone, lower the level of your voice andincrease the distance between the microphone screen and your mouth when talkinginto the microphone.

• If clipping is occurring when using an auxiliary audio device connected through the MP3player, lower the output volume of the auxiliary audio device.

7.4.4 Symptom: The LRAD will not produce audio when using the MP3 Control Unit.

If the MP3 player powers up but will not produce audio through the LRAD, perform the following checks.

• Ensure that the LRAD’s volume knob is not set to minimum.

• Select a different audio track on the MP3 player or play the Alert Tone using the buttonon the side of the MP3 player. If a different audio track does work, upload the problemaudio file to a computer using the USB interface cable and attempt to play the file onthe PC to ensure that the audio file is recorded correctly.

• Test the LRAD’s audio output using the microphone. If there is still no output with themicrophone, the Amplifier Module may have to be repaired or replaced.

• If these steps do not correct the problem, the MP3 Control Unit may have to be repairedor replaced.

7.4.5 Symptom: MP3 Control Unit not recognized by computer or computer gives error message when connecting MP3 Control Unit.

The USB download cable provided with the MP3 control unit has a USB compliant connector at one end and a MIL-DTL-D38999 connector at the other. The MIL connector is not fully USB compliant and does not provide a mate first/break last ground connection as required by the USB standard. For this reason, it is important to plug the MIL connector into the MP3 player



first and then plug the USB connector into the computer. Not establishing the connection in this order can lead to problems with recognition of the USB device.

• Disconnect the USB connector from the computer, reboot the computer, and reconnectto the computer after a reboot.

• Inspect the USB download cable for damage and replace if necessary.

• Try connecting to a different USB port on the computer. Some systems such as laptopswith docking stations and USB hubs may give intermittent USB device recognitionerrors.

8.0 Preparation for Shipment

The LRAD should be shipped in its original shipping container.

9.0 Storage

As with any electronic product, the LRAD should be protected from excess heat and moisture during storage.

When not in operation, the LRAD Head Unit should remain covered with the provided cover.

For long-term storage, the LRAD should be stored in its shipping container.

The LRAD contains no hazardous energetic materials.

WARNING!

Two-man lift. Risk of injury or equipment damage.



10.0 Specifications

Mechanical

Acoustic

Environmental

Electrical

Dimensions 39” W x 36” H x 12” D (99cm x 91cm x 31cm)

Weight (Head Unit) 90 lbs. (41kg)

Construction Molded Low Smoke Composite, 6061 Aluminum, 316 Stainless hardware

Electronics Housing 22” W x 9” H x 15” D (56cm x 23cm x 38cm) Water Resistant Case

Maximum Peak Output 160 dB SPL @ 1 Meter, C-weighted

Maximum Continuous Output

155 dB SPL @ 1 Meter, A-weighted

Sound Projection (Acoustic Beam Width)

+/- 15° @ 1 kHz -3dB

Communication Ranges (Continuous Output)

5000 meter in ideal conditions 1600 meters with 88 dB of background noise

Random Vibration MIL-STD-810G, Method 514-4, Wheeled Vehicles

Shipboard Vibration MIL-STD-167-1A

Shipboard Shock MIL-S-910D, Class I, Shock grade B

SRS Shock MIL-STD-810G, Method 516.6, Procedure 1 (Functional Shock)

Low/High Temp: Operational

MIL-STD-810G, Method 501.5 & 502.5, Procedure II, -33° to 55° C

Low/High Temp: Storage MIL-STD-810G, Method 501.5 & 502.5, Procedure I, -40° to 70° C

Rain MIL-STD-810G, Method 506.5, Procedure I, Blowing Rain

Operating Humidity MIL-STD-810G, Method 507.5, Procedure II, Aggravated Cycle

Salt Fog MIL-STD-810G, Method 509.5

Safety MIL-STD-1474D

Peak Power Consumption 1120 Watts

Normal Power Consumption, Standby 150 Watts (average)

Normal Power Consumption for Voice Broadcasts 750 Watts (average)

Normal Power Consumption for Alert Tone 1120 Watts (peak)

Power Input 90-260 VAC 50/60 Hz

Electromagnetic Compatibility FCC Part 15 Class A radiated emissions, CE



11.0 Technical Support

Contact information for help and technical support is listed below.

Genasys Inc. 16262 West Bernardo Drive SAN DIEGO, CA 92127

[email protected]

Documents

LRAD 1950XL EQUIPMENT MANUAL - portal.genasys.com