Shure Lx1 User manual

LX Wireless System

27D8654 (BK)

2002, Shure Incorporated Printed in U.S.A.

LX Wireless System

User Guide

English

1

READ ME FIRST!

To get your system up and running in just a few minutes, follow the simple in-

structions on this page. For more detailed information, refer to the sections of

this guide that apply to your system.

Receiver Connections

1. Attach the antennas to the receiver antenna connectors.

2. Connect the AC power adapter to the receiver power connector; then plug it into an

ac electrical outlet.

3. Connect the receiver audio output to the sound system, using either a low- or high-

impedance audio cable.

Transmitter Connections

1. Open the transmitter battery compartment and insert a fresh 9-volt alkaline

battery. Observe proper battery polarity ( “+/–”).

2. If you are using a body-pack transmitter, connect the microphone or WA302 instru-

ment cable to the 4-pin connector on the transmitter.

Operating the System

1. Press the receiver POWER switch. The green POWER light on the receiver

illuminates.

2. Set the transmitter PWR/OFF switch to PWR and the ON/MUTE switch to ON. One

of the three lights on the transmitter illuminates, indicating both that the transmitter

is on and the amount of battery life remaining. Two sets of five RF level lights on the

receiver will also glow to indicate the strength of the received signal. The more lights

glowing, the stronger the signal.

3. Have someone talk or sing into the microphone, or play the musical instrument con-

nected to the transmitter. The audio level will be indicated as follows:

-Green lights (3) glowing indicates normal operation.

-Amber light glowing indicates approaching audio overload (should only occur

during loud signals).

-Red light glowing steadily indicates audio overload. If this happens, reduce the

transmitter gain until it flickers only during the loudest signals. Refer to the Trans-

mitter Audio Gain Adjustment section of this guide.

4. Adjust the receiver LEVEL control until the output level is compatible with the mixer

or amplifier input. In most cases, this control should be set fully clockwise.

YOU ARE NOW READY TO PERFORM!

IMPORTANT:Every wireless microphone installation is a unique situation, and can

present a variety of problems. Never attempt a live performance without first conduct-

ing a “walkthrough” test of the system in the performing area. If major changes (addi-

tional wireless systems or intercoms, relocation of scenery, etc.) have been made

since the last walk–through test, check the wireless system again—as close to perfor-

mance time as possible.

Wireless

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TABLE OF CONTENTS

SYSTEM COMPONENTS 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SYSTEM FEATURES 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LX1 BODY-PACK TRANSMITTER FEATURES, CONTROLS & INDICATORS 7. . .

LX2 HAND-HELD TRANSMITTER FEATURES, CONTROLS & INDICATORS 8. .

LX3 RECEIVER FEATURES, CONTROLS & INDICATORS 9. . . . . . . . . . . . . . . . . .

LX4 DIVERSITY RECEIVER FEATURES, CONTROLS & INDICATORS 10. . . . . . .

RECEIVER MOUNTING 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Single Rack Mounted Receiver 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Double Rack Mounted Receivers 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RECEIVER CONNECTIONS 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TRANSMITTER SETUP 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LX1 Body-Pack Transmitter Battery Installation 13. . . . . . . . . . . . . . . . . . . . . . . .

LX2 Hand-Held Microphone-Transmitter Battery Installation 13. . . . . . . . . . . . .

Checking the Transmitter Battery 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connecting a Lavalier Microphone or Instrument Cable to the LX1 14. . . . . . .

Attaching the LX1 to a Belt or Guitar Strap 15. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing the WA555 Grip/Switch Cover Accessory on the LX2 15. . . . . . . . . .

OPERATING LX1 BODY-PACK SYSTEMS 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPERATING THE LX2 HAND-HELD SYSTEM 17. . . . . . . . . . . . . . . . . . . . . . . . . . . .

GAIN AND SQUELCH ADJUSTMENT 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjusting the Transmitter Audio Gain Level 18. . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjusting the Receiver Squelch Control 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TIPS FOR ACHIEVING OPTIMUM PERFORMANCE 19. . . . . . . . . . . . . . . . . . . . . . .

TROUBLESHOOTING 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SPECIFICATIONS 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FURNISHED ACCESSORIES 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPTIONAL ACCESSORIES 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REPLACEMENT PARTS 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LICENSING INFORMATION 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

English

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SYSTEM COMPONENTS (FIGURE 1)

LX1

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LEVEL POWER

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RF A RF B AUDIO SQUELCH DIVERSITY

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RF AUDIO SQUELCH LEVEL POWER

LX3

WIRELESS

LX WIRELESS MICROPHONE SYSTEM COMPONENTS

FIGURE 1

Your LX Wireless Microphone System features a MARCADfixed frequency diver-

sity receiver operating in the VHF band between 169 and 240 MHz. Up to 12 LX wire-

less systems can be operated simultaneously in a single installation. Each LX system

contains a combination of the following items:

•One of the following transmitters:

LX1 Body-Pack Transmitter, with your choice of instrument cable or microphone,

or

LX2Hand-Held Microphone-Transmitter with your choice of interchangeable micro-

phone heads:

-SM58cardioid dynamic microphone

-BETA 58supercardioid premium dynamic microphone

-SM87 supercardioid condenser microphone

-BETA 87supercardioid premium condenser microphone

•One of the following half-rack size receivers:

LX3 Receiver

or

LX4 Diversity Receiver

•Both single and dual rack-mounting hardware

•One antenna (LX3 systems) or two antennas (LX4 systems)

•One of the following ac power adapters: PS40,PS40E, or PS40UK.

Wireless

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SYSTEM FEATURES

Shure LX Wireless Systems offer a number of exceptional features, including:

•Exclusive Shure MARCADCircuitry (LX4). MARCAD (MAximum Ratio Combin-

ing Audio Diversity)circuitry constantly monitors signals from both receiver sections

and combines them to create a single output signal. The result is improved reception

and exceptional freedom from dropouts.

•Half-Rack Receiver Size. The LX3 and LX4 receivers interface with the HR (half-

rack) format, and are supplied with both single and dual rack-mount hardware. An

optional WA503 accessory kit lets you front-mount antennas.

•Power/Battery Fuel Gauge. The LX1 and LX2 transmitters include a three-light

gauge that indicates both “power on”and the amount of battery life remaining. (Refer

to the Checking the Transmitter Battery section.)

•Dual RF Level Meters (LX4). Instead of a conventional single RF meter, the LX4

receiver has two meters, one for each antenna. The dual meters indicate received

signal strength at each antenna, and make it easier to identify and troubleshoot RF

“dead spots.”

•Audio Metering. A five-light audio meter helps to optimize transmitter gain setting

and lets you monitor audio level during operation.

•True Guitar Sound. Guitar players demanding the highest degree of sound quality

and reliability will appreciate the low noise and uncolored sound of the LX Wireless

System.

•Noise Squelch. This circuit analyzes signal quality instead of signal strength. This

virtually eliminates the possibility of annoying noise bursts coming through your re-

ceiver.

•Body-Pack Transmitter Belt Clip. The belt clip has a wider contact surface for a

better grip, and firmly holds thinner, more slippery materials. It can be removed or

inverted for special positioning.

•Grip/Switch Cover Accessory. The unbreakable WA555 grip/switch cover acces-

sory, supplied with all LX2 hand-held microphone-transmitters, prevents accidental

movement of the power and mute switches and provides a “grip”feel.

•Compact Power Adapter. The supplied ac power adapter incorporates small, in-

line transformers that save space on ac power strips. It also has mounting tabs so

it can be secured to any surface, as well as locking dc power connectors to prevent

accidental disconnection from the receiver.

English

5

LX1 BODY-PACK TRANSMITTER

FEATURES, CONTROLS, & INDICATORS (FIGURE 2)

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LX1 BODY-PACK TRANSMITTER FEATURES, CONTROLS & INDICATORS

FIGURE 2

1. Antenna. A flexible wire antenna is permanently attached to the bottom of the LX1

body-pack transmitter. For best operation, the antenna must hang in the vertical

position, and should not be coiled or bundled.

2. Battery Compartment. Hinged cover on bottom surface exposes the battery. Refer

to the Body-Pack Transmitter Battery Installation section.

3. Audio Gain Control. Allows audio level adjustment to accommodate various

sound sources (e.g., singing, speaking, or playing an instrument). A small screw-

driver is supplied to make adjustments (see the Setting Audio Level section).

4. Input Jack. This is a Mini- connector (TA4F) that provides connection with a variety

of lavalier and headset microphone cables, and the Shure WA302 instrument

adapter cable.

5. Power/Battery Fuel Gauge. When the Power switch is turned to the PWR position,

one or two of the three lights on the transmitter illuminates, indicating power to the

unit. The color of the glowing light(s) indicates the amount of battery life remaining.

Refer to the Checking the Transmitter Battery section.

6. Belt Clip. Allows the transmitter to be easily worn on a belt, waistband or guitar

strap.

7. Mic On/Mute Switch. “Mutes”the transmitter to prevent unwanted sounds from be-

ing picked up by the receiver without turning the transmitter off.

8. Power Switch. Turns transmitter power on and off.

Wireless

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LX2 HANDHELD MICROPHONE-TRANSMITTER

FEATURES, CONTROLS, & INDICATORS (FIGURE 3)

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LX2 MICROPHONE–TRANSMITTER FEATURES, CONTROLS, & INDICATORS

FIGURE 3

1. Grille. Protects the microphone cartridge and helps reduce breath sounds and wind

noise. The grilles for the various microphone heads differ in appearance.

2. Power Switch. Turns transmitter power on and off.

3. Power/Battery Fuel Gauge. When the Power switch is turned to the PWR position,

one or two of the three lights on the transmitter illuminates. The color of the glowing

light(s) indicates the amount of battery life remaining. Refer to the Checking the

Transmitter Battery section.

4. Mic On/Mute Switch. “Mutes”the transmitter to prevent unwanted sounds from be-

ing picked up by the receiver without turning the transmitter off.

5. Audio Gain Control. Provides audio level adjustment to accommodate different

sound sources. Refer to the Setting Transmitter Audio Level section.

6. Battery Cover. Removable cup hides battery and audio gain control.

English

7

LX3 RECEIVER

CONTROLS, FEATURES & INDICATORS (FIGURE 4)

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RF AUDIOSQUELCH LEVEL POWER

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OUTPUT

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LX3 RECEIVER CONTROLS, FEATURES, & INDICATORS

FIGURE 4

1. RF Presence Indicators. Glows amber when the antenna is receiving usable RF (ra-

dio frequency) signals.

2. Audio Level Indicators. Five lights glow to indicate audio signal strength. Green

lights indicate normal operation. An amber light indicates approaching overload

condition. A red light indicates excessive audio levels.

3. Squelch Control. Sets the point at which the receiver “mutes”when the transmitter

signal becomes noisy, weak or fails. This control is factory-set at the 12 o’clock position

to provide optimal operation in most applications.

4. Audio Output Level Control. Lets you adjust output level to match the input level

requirements of a mixer or amplifier. In most situations, this control should be set

fully clockwise.

5. Power On Indicator. This green light glows to indicate that the Power switch is on

and power is applied to the receiver.

6. Power On/Off Button. Turns the receiver on and off.

7. Output Connector. Quarter-inch phone jack provides unbalanced auxiliary level

(high-impedance) output.

8. Power Jack: Accepts power from the supplied AC adapter, or from any filtered 15

to 18 Vdc (400 mA minimum) supply. It will also accept the dc power cord from a

Shure WA405 Antenna Power/Distribution System.

9. Antenna Connector. UHF-type connector provides connection to the supplied

1/4-wave antenna or to coax cable used with a remote antenna. They also provide

connection to the optional Shure WA421 remote antenna cable kit used with optional

WA380 telescoping and WA490 cable-type 1/2-wave antennas.

Wireless

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LX4 DIVERSITY RECEIVER

CONTROLS, FEATURES & INDICATORS (FIGURE 5)

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RFA RF B AUDIO SQUELCH LEVEL

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ANTANT OUTPUTS

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MIC LINE

POWER

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LX4 DIVERSITY RECEIVER CONTROLS, FEATURES, & INDICATORS

FIGURE 5

FRONT

REAR

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1. Diversity Signal Indicators for A and B Antennas. These lights glow amber when

A, B, or both antennas are receiving usable RF (radio frequency) signals.

2. RF Level Indicators. Five lights per antenna glow to indicate RF signal strength.

The more lights that glow, the stronger the received signal. If none of these lights

glows, no signal is being received.

3. Audio Level Indicators. Five lights glow to indicate audio signal strength. Green

lights indicate normal operation. An amber light indicates approaching overload

condition. A red light indicates excessive audio levels.

4. Squelch Control. Sets the point at which the receiver “mutes”when the transmitter

signal becomes noisy, weak or fails. This control is factory-set at the 12 o’clock position

to provide optimal operation in most applications.

5. Audio Output Level Control. Lets you adjust output level to match the input level

requirements of a mixer or amplifier. In most situations, this control should be set

fully clockwise.

6. Power On Indicator. This green light glows to indicate that the Power switch is on

and power is applied to the receiver.

7. Power On/Off Button. Turns the receiver on and off.

8. Antenna Connectors. UHF-type connectors provide connection to the supplied

1/4-wave antennas or to coax cable used with remote antennas. They also provide

connection to the optional Shure WA421 remote antenna cable kit used with optional

WA380 telescoping and WA490 cable–type 1/2-wave antennas.

9. Output Connectors. XLR connector provides balanced low-impedance mic level

or line-level output. Quarter-inch phone jack provides unbalanced auxiliary level

(high-impedance) output.

10.Mic/Line Slide Switch: Controls output of balanced XLR connector. It can be set

for microphone (-20 dBV maximum) or line-level (+0 dBV maximum).

11.Power Jack: Accepts power from the supplied ac adapter, or from any filtered 15

to 18 Vdc (400 mA minimum) supply. It will also accept the dc power cord from a

Shure WA405 Antenna Power/Distribution System.

English

9

RECEIVER MOUNTING

Single Rack–Mounted Receiver (Figure 6)

If the receiver is to be located on a table or other horizontal surface, attach the four

adhesive bumpers to the bottom corners of the receiver. If the receiver is to be mounted

in an audio equipment rack, identify the rack-mount kits supplied with your system and

follow the appropriate assembly directions below.

1. Remove two screws from each side of the receiver.

2. Position the large mounting brackets over the holes on the sides of the receiver and

secure them to the receiver with the screws removed in Step 1.

3. If you are not going to front mount the antennas with a Shure WA503 Front Mount

Conversion Kit, insert the plastic plugs into the holes in the brackets.

4. Secure the assembly to a standard audio equipment rack with four screws.

SINGLE RACK–MOUNTED RECEIVER

FIGURE 6

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Double Rack–Mounted Receivers (Figure 7)

1. Remove the two screws on the outer side of each receiver.

2. Position the small mounting brackets over the holes on the outer side of each receiv-

er, and secure them with the screws removed in Step 1.

3. Remove the screws on the inner side of each receiver.

4. Position two link bars over the holes and secure them with the screws removed in

Step 3. For the receiver on the left, the link bar should be positioned so that its

threaded hole is toward the front of the receiver. For the receiver on the right, the

link bar should be positioned so that its threaded hole is toward the rear of the

receiver.

5. Place the two receivers next to each other so that the threaded holes in the link bars

line up, one on top of the other.

6. Fasten the receivers together by inserting a small screw from the top into the threaded

hole at the front of the link bar. Then insert the other screw from the bottom into the

threaded hole at the rear of the link bar.

7. Secure the assembly to a standard audio equipment rack, using four screws.

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DOUBLE RACK–MOUNTED RECEIVERS

FIGURE 7

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Wireless

10

RECEIVER CONNECTIONS (FIGURE 8)

1. Attach the supplied quarter-wave antenna(s) to the antenna connector(s) on the receiv-

er back panel. For best performance, the LX4 receiver antennas should be oriented

with the tips pointing away from each other at a 45°angle from vertical. The LX3 receiv-

er antenna should be vertical.

2. Connect the receiver output to the mixer or amplifier input, using a standard audio

cable with a female 3-pin XLR connector or 1/4-inch phone plug.

3. Connect the ac adapter to the POWER jack on the rear panel of the receiver.

4. Plug the ac adapter into an appropriate ac power source.

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1

RF AUDIO SQUELCH LEVEL POWER

34256

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ANT

OUTPUT

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12.5 –18.9 VDC

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LX3

AUDIO MIXER

RECEIVER CONNECTIONS

FIGURE 8

NOTE:If the receiver is rack-mounted, the antenna(s)must extend above the rack cabinet

or be remotely located.

Improved LX4 diversity performance may be obtained by installing one or both anten-

na(s) at a remote location and separating them by 1.5 meters (60 inches) or more.

Shure WA380 telescoping or WA490 cable-type 1/2-wave antennas are recommended

for remote location, and they should be connected to the receiver via WA421 Extension

Cable Kit(s) or other suitable low-loss cable.

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11

TRANSMITTER SETUP

LX1 Body-Pack Transmitter Battery Installation (Figure 9)

1. With the transmitter POWER PWR/OFF switch in the OFF position, press down on the

OPEN side of the battery compartment cover, slide it back and flip it open.

2. Insert a new 9V alkaline battery in the compartment (DURACELLMN1604 recom-

mended). Observe proper battery polarity (“+/–”).

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FIGURE 9

LX1 BODY–PACK TRANSMITTER BATTERY INSTALLATION

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IMPORTANT: A fresh 9V alkaline battery should provide 18 to 20 hours of

operation. However, an 8.4V nickel-cadmium (nicad)battery will only pro-

vide 3 hours of operation. Carbon-zinc and zinc-chloride batteries will not

provide sufficient power, and are not recommended.

LX2 Hand-Held Microphone-Transmitter Battery Installation (Figure 10)

1. With the transmitter PWR/OFF switch in the OFF position, hold the upper part of the

transmitter and unscrew the battery cover.

2. Install a fresh 9V alkaline battery (DURACELL MN1604 recommended). Make sure

the battery terminals match the terminals in the transmitter.

3. Screw the battery cover back into place.

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LX2 MICROPHONE-TRANSMITTER BATTERY INSTALLATION

FIGURE 10

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Checking the Transmitter Battery

Turn the transmitter PWR/OFF switch to the PWR position and observe that one or

two of the three lights on the transmitter glows. The amount of battery life remaining will

be indicated by the color of the light(s), as shown in the following table.

Battery Life Indicators Remaining Transmitter

Operating Time*

Green 6 to 20 hours

Green and Amber 4 to 6 hours

Amber 2 to 4 hours

Red 1 hour or less

* Estimated operating time assumes the use of a fresh 9 V alkaline battery (Duracell MN1604).

NOTE: A rechargeable 8.4V nicad battery causes the indicators to change more quick-

ly than if using a 9V alkaline battery. Actual times depend on the type and brand of bat-

tery used.

Connecting a Microphone or Instrument Cable to the LX1

(Figure 11)

1. Connect the microphone cable or instrument cable to the transmitter input jack.

2. Install the microphone by attaching it to the user’s tie, shirt, or collar (lavalier mic),

placing it over the user’s head (headset mic), or affixing it to an acoustic musical

instrument (instrument mic).

3. If using an instrument adapter cable, attach the other end of the instrument cable

to the instrument output connector.

MICROPHONE CABLE OR

WA302 INSTRUMENT ADAPTER

CABLE

LX1 BODY-PACK TRANSMITTER CABLE CONNECTION

FIGURE 11

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13

Attaching the LX1 to a Belt or Guitar Strap (Figure 12)

Attach the LX1 body-pack transmitter clip to a belt, waistband, or guitar strap by de-

pressing the tab marked PRESS and slipping the belt or strap between the transmitter

body and the belt clip, as shown in Figure 11. The clip holds tightest if the material is

drawn to the clip’s top wire (especially thinner guitar straps).

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BELT OR GUITAR STRAP

ATTACHING THE LX1 TO A BELT OR GUITAR STRAP

FIGURE 12

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Installing the WA555 Grip/Switch Cover Accessory

on the LX2 (Figure 13)

The LX2 transmitter comes with an external sleeve accessory (WA555) that pre-

vents accidental movement of the microphone controls without affecting RF perfor-

mance. It also provides the microphone with a “grip”feel. To install the grip/switch cov-

er, proceed as follows:

WA555 GRIP/SWITCH

COVER

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INSTALLING THE OPTIONAL LX2 GRIP/SWITCH COVER ACCESSORY

FIGURE 13

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123

1. Unscrew the battery cover.

2. Slide the cover over the microphone handle, “lip”end downward. The cover fits

snugly and requires additional pressure for the last inch of travel.

3. Reinstall the battery cover.

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LX1 BODY–PACK SYSTEM SETUP AND OPERATION

FIGURE 14

RECEIVER

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WM98 MIC

& A98KCS

HORN MOUNT

WH20

HEADSET

WA302 INSTRUMENT

ADAPTER CABLE

LAVALIER

MIC

Á

OPERATING LX1 BODY–PACK SYSTEMS (FIGURE 14)

1. Clip the LX1 body pack transmitter to your belt, waistband, or guitar strap.

2. Connect the lavalier microphone, headset or instrument adapter cable to the body–

pack transmitter.

3. If you are using a lavalier microphone, clip the mic to your tie, lapel, or other gar-

ment. If you are using a headset, put the headset on. If you are using a Shure WM98

microphone, insert it into an A98KCS horn mount and clamp it to your horn. If you

are using an instrument adapter cable, plug the cable into the instrument.

4. Slide the transmitter PWR/OFF switch to the PWR position. One of the three lights

on the transmitter illuminates.

5. Press the POWER button on the receiver. The green “power on”light on the receiver

and the RF light(s) illuminates.

6. Slide the transmitter ON/MUTE switch to the ON position and begin speaking or

playing your instrument.

NOTE: If the red PEAK light on the receiver does not flicker during the loudest sounds,

the transmitter gain may need to be increased. Refer to the Adjusting the Transmitter

Audio Gain Level section.Then, if the system is still not operating properly, consult the

Troubleshooting table.

7. During the performance or presentation, slide the ON/MUTE switch to the MUTE

position when the system is not in use.

8. When the performance or presentation is over, slide the transmitter PWR/OFF

switch to the OFF position to conserve battery power.

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15

OPERATING THE LX2 HAND-HELD SYSTEM (FIGURE 15)

LX2

TRANSMITTER

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LX2 HAND–HELD MICROPHONE SYSTEM OPERATION

FIGURE 15

1. Slide the transmitter PWR/OFF switch to the PWR position. One of the three lights

on the transmitter illuminates.

2. Press the POWER button on the receiver. The green power on indicator and the RF

light(s) illuminates.

3. Slide the transmitter ON/MUTE switch to the ON position and begin speaking or

playing your instrument.

NOTE: If the red PEAK light on the receiver does not flicker during the loudest sounds,

the transmitter gain may need to be increased. Refer to the Adjusting the Transmitter

Audio Gain Level section.Then, if the system is still not operating properly, consult the

Troubleshooting table.

4. During the performance or presentation, slide the ON/MUTE switch to the MUTE

position when the system is not in use.

5. When the performance or presentation is over, slide the transmitter PWR/OFF

switch to the OFF position to conserve battery power.

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GAIN AND SQUELCH ADJUSTMENT

Adjusting the Transmitter Audio Gain Level (Figure 16)

The transmitter audio gain level has been factory pre-set to provide satisfactory out-

put in most applications. However, for loud singers or high-output musical instruments,

the preset level may be too high, as indicated by the constant glow of the red light on

the receiver audio level meter. Soft-spoken talkers or singers may find that the factory

setting is too low, as indicated by the failure of the amber audio level light to light at all.

To adjust the audio gain, locate the transmitter audio gain control and use the sup-

plied screwdriver to adjust the control.

•For high sound pressure level applications, such as loud singing, decrease the au-

dio gain level by rotating the gain control counterclockwise (while the vocalist is sing-

ing or the musical instrument is being played) until the red audio level light on the re-

ceiver flickers occasionally.

•For low sound pressure level applications, such as soft–spoken talkers, increase

the audio gain level by rotating the gain control clockwise (while the vocalist is sing-

ing or the musical instrument is being played) until the red audio level light on the

receiver flickers occasionally.

NOTE: If using the WH20TQG headset, you must increase the gain level to the full

clockwise position. Then, if necessary, rotate the control back slightly.

FIGURE 16

LX1

INCREASE GAIN

DECREASE

GAIN

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INCREASE

GAIN

DECREASE GAIN

TRANSMITTER AUDIO GAIN LEVEL ADJUSTMENT

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17

Adjusting the Receiver Squelch Control (Figure 17)

The receiver squelch control is factory preset at the 12 o’clock position for op-

timum performance. No further adjustment is normally required. However, it is

possible to adjust the squelch control to emphasize either signal quality or system

range.

•To raise the squelch threshold, rotate the control clockwise. This causes the receiver

to demand ahigher quality signal (less noise before muting),but itreduces the operating

range.

•To lower the squelch threshold, rotate the control counterclockwise. This allows a

lower quality signal through (more noise before muting), but it extendsthe operating

range.

DECREASE

SQUELCH INCREASE

SQUELCH

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RF AUDIO

SQUELCH LEVEL POWER

LX4 LX3 DECREASE

SQUELCH INCREASE

SQUELCH

RECEIVER SQUELCH CONTROL ADJUSTMENT

FIGURE 17

TIPS FOR ACHIEVING OPTIMUM PERFORMANCE

•Maintain a line-of-sight between the transmitter and receiver antennas, if possible.

Avoid placing transmitter and receiver where metal or other dense materials may

be present.

•Avoid placing the receiver near computers or other RF generating equipment.

•Avoid placing the receiver in the bottom of an equipment rack unless the antennas

are remotely located.

•Use the proper receiver antenna(s). A 1/4-wave antenna can be used if it is mounted

directly on the receiver; use a 1/2-wave or other ground-plane-dependent antenna

if antennas are remotely located. Use the Shure WA503 Front-Mount Antenna Con-

version Kit to mount antennas on the front of the receiver.

•Mount 1/4-wave antennas with the antenna tips pointed away from each other at a

45°angle, and away from large metal objects.

•Use the proper antenna cable when remotely locating receiver antennas. For best per-

formance, use the Shure WA421 50 ΩRG-58 coaxial antenna cable, and the minimum

length necessary. For cable runs greater than 12.2 meters (40 feet), use RG–8 coaxial

cable.

•Mount diversity antennas at least1/4-wave apart [42 cm (17 inches) for VHF systems,

although a 1.5 m (60 inches) spacing is preferred]. For multiple system installations,

use the Shure WA405 Antenna/Power Distribution Kit or the WA470 Passive Antenna

Splitter to minimize the number of antennas and reduce interference.

•Use the Shure WA302 Instrument Cable when using the LX1 transmitter with a musi-

cal instrument.

•If using multiple wireless systems, maintain a distance of at least 3 meters (10 ft.)

between the transmitter and the closest receiving antenna.

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TROUBLESHOOTING

The table below identifies some common problems and their solutions. If unable to

solve a problem, contact your dealer or the Shure Service Department at 847-866-5733

(7:30 am to 4:00 pm CST). In Europe, call 49-7131-72140; other international users call

Shure in the U.S.A. at 847-866-2200.

Problem Solution

No sound; receiver RF light(s) and

AUDIO lights not glowing. Make sure POWER switches on transmitter

and receiver are on.

Check transmitter Power/Battery Fuel

Gauge to ensure that battery is providing

power. Replace battery if necessary.

Check receiver squelch setting.

Check receiver antenna connection(s).

Make sure at least one antenna is in the line

of sight of the transmitter. If necessary, re-

duce the distance between transmitter and

receiver.

No receiver sound; RF and Audio Level me-

ter lights glowing. Turn up the receiver audio output LEVEL con-

trol.

Check for proper connection between re-

ceiver and microphone mixer.

Talk into the microphone and observe the

receiver audio level lights. If they glow, the

problem is elsewhere in the sound system.

Received signal is noisy or contains

extraneous sounds with transmitter on. Check Power/Battery Fuel Gauge and re-

place battery if power is low.

Remove local sources of RF interference,

such as lighting equipment.

If using a guitar or other instrument, make

sure it is connected to the LX1 with a Shure

WA302 adapter cable.

Two transmitters may be operating on the

same frequency. Locate and turn one off.

Signal may be too weak. Reposition anten-

nas. If possible, move them closer to the

transmitter.

Adjust receiver squelch control.

Noise from receiver with transmitter off. Adjust receiver squelch control.

Remove local sources of RF interference,

such as lighting equipment.

Reposition the receiver or antennas.

Momentary loss of sound as transmitter is

moved around performing area. Reposition receiver and perform another

“walkthrough”test and observe the RF level

or Diversity signal indicators. If audio drop-

outs persist, mark these “dead spots”in the

performing area and avoid them during the

performance.

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19

SPECIFICATIONS

RF Carrier Frequency Range

169.445 to 240.000 MHz (available frequencies depend on the applicable regulations in the

country where the system is used)

Working Range

91 m (300 ft) under typical conditions. NOTE: Actual working range depends on RF signal

absorption, reflection and interference.

Audio Frequency Response

50 to 15,000 Hz, ±2 dB. NOTE: Overall system frequency response depends on the micro-

phone element.

Audio Output Level (±15 kHz deviation, 1 kHz tone)

XLR connector (into 600 Ωload): 0 dBV (line), –20 dBV (mic)

1/4inch connector (into 3 kΩload):–8.8 dBV

Gain Adjustment Range

LX1: 40 dB

LX2: 25 dB

Impedances

LX1 (input): 1 MΩ

LX3 (output): 3 kΩ(1/4-inch phone jack)

LX4 (output): 150 Ω(XLR); 3 kΩ(1/4-inch phone jack)

Modulation

±15 kHz deviation compressor-expander system with pre- and de-emphasis

RF Power Output

LX1, LX2: 50 mW maximum (complies with FCC and IC regulations)

Dynamic Range

>102 dB, A-weighted

RF Sensitivity

0.45 µV for 12 dB SINAD (typical)

Image Rejection

80 dB typical

Spurious Rejection

75 dB typical

Ultimate Quieting (ref. 15 kHz deviation)

>100 dB, A-weighted

Audio Polarity

Positive pressure on microphone diaphragm (or positive voltage applied to tip of WA302

phone plug) produces positive voltage on pin 2with respect to pin 3of low impedance output

and the tip of the high impedance 1/4-inch output.

System Distortion (ref. ±15 kHz deviation, 1 kHz modulation)

0.3% THD typical

Power Requirements

LX1, LX2: 9V alkaline battery (Duracell MN1604 recommended); 8.4V Nicad optional

LX3, LX4: 12.5 - 18 Vdc (negative ground), 400 mA

Battery Life

18 to 20 hours (with Duracell MN1604 9V alkaline battery)

Operating Temperature Range

-20°to 50°C (–4°to 122°F). NOTE: Battery characteristics may limit this range.

Overall Dimensions

LX1: 83 mm H x 64 mm W x 26 mm D (31/4x 21/2x 11/32 in.)

LX2/58, LX2/BETA 58: 241 mm L x 51 mm Dia. (91/2x 2 in.)

LX2/87, LX2/BETA 87: 216 mm L x 51 mm Dia. (81/2x 2 in.)

LX3, LX4: 43 mm H x 214 mm W x 183 mm D (111/16 x 87/16 x 73/16 in.)

Shure LX1 User manual

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