PRODUCT INFORMATION
LX88-II Wireless System
User Guide
222 Hartrey Avenue, Evanston, IL 60202–3696, U.S.A.
Phone: 847-866–2200 Fax: 847-866-2279
In Europe, Phone: 49-7131-72140 Fax: 49-7131-721414
In Asia, Phone: 852-2893-4290 Fax: 852-2893-4055
Elsewhere, Phone: 847-866–2200 Fax: 847-866-2585
2000, Shure Incorporated
27A8582 (TG)
Printed in U.S.A.
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CONGRATULATIONS!
The LX88-II Wireless System is the finest in its class. This system will give you
excellent performance for years to come.
SYSTEM CONTENTS
The LX88-II Wireless System contains the following components:
• One LX88-II dual channel wireless receiver
• Two transmitters available in one of three different combinations (see System
Combinations below)
• Two antennas
• One PS20 (120 Vac) or PS20E (230 Vac) power adapter
• One hardware kit
• Two rackmount brackets
System Combinations
The LX88-II system includes one of the following three transmitter combina-
tions:
• Two handheld microphone transmitters (includes two swivel adapters and two
anti-roll devices)
or
• Two body-pack transmitters
or
• One handheld microphone and one body-pack transmitter (includes one swiv-
el adapter and one anti-roll device)
1
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LX88-II Receiver Features & Controls (Figure 1)
LX2 Handheld Microphone-Transmitter Features & Controls (Figure 2)
FRONT
1
4
5
1
2
3
4
2
1
3
2
3
BACK
BAT
4
7
6
6
8
9
7
MUTE
LX88-II DUAL CHANNEL RECEIVER FEATURES & CONTROLS
5
FIGURE 1
LX2
Front
1. Power Indicators.
2. RF Signal Indicators. Yellow indicates when RF (radio frequency) signals are re-
6
ceived from the transmitter.
3. Audio Peak Indicators. This light flickers occasionally in normal operation; is ON
LX2 MICROPHONE–TRANSMITTER FEATURES & CONTROLS
steadily when the audio input is overloaded.
FIGURE 2
4. Volume Controllers. Controls the audio output level.
5. POWER ON/OFF Switch.
1. Grille.
Back
2. Power ON/OFF Switch.
6. Antenna Connectors.
7. Independent Audio Output Connectors. There is a separate balanced XLR
3. Power/Battery Fuel Gauge. Indicates the power level of the battery.
1
connector and unbalanced / –inch phone jack for each channel.
4
4. Mic On/Mute Switch. “Mutes” the transmitter to prevent unwanted sounds
1
8. Mixed Channels Audio Output Connector. An unbalanced, / –inch phone
4
from being picked up by the receiver without turning the transmitter off.
jack connector mixes both channels into a single output. This comes in handy
when the mixer or amplifier has only one audio input.
5. Audio Gain Control. Provides audio level adjustment to accommodate dif-
9. Power Input Connector. Connects to a PS20 (120 Vac) or PS20E (230 Vac)
ferent sound sources.
power adapter.
6. Battery Cover. Access to the battery and the audio gain control.
2
3
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LX1 Body-Pack Transmitter Features & Controls (Figure 3)
SYSTEM INSTALLATION
MOUNTING THE RECEIVER
6
8
The LX88-II Dual Channel Wireless Receiver can be mounted in two ways: as a
stand-alone unit or as a rack-mount unit.
2
3
As a Stand-Alone Unit (Figure 4)
ON
MUTE BAT OFFPWR
1
4
5
7
INSTALLING RUBBER FEET
LX1 BODY-PACK TRANSMITTER FEATURES & CONTROLS
FIGURE 4
FIGURE 3
1. Turn the unit upside-down.
1. POWER ON/OFF Switch.
2. Place the rubber feet supplied with the package in the four corners of the base.
3. Turn the unit rightside-up. It can now be mounted on any flat surface, such as a
table, with the feet working as anchors to prevent slipping.
2. Power/Battery Fuel Gauge. Indicates the power level of the battery.
3. Input Jack. Tini “Q-G” input connector for microphones or instruments.
4. Mic On/Mute Switch. “Mutes” the transmitter to prevent unwanted sounds
As a Rack-Mount Unit
from being picked up by the receiver without turning the transmitter off.
1. Remove the two screws from each side of the receiver.
5. Belt Clip. Secures Body-Pack to clothing or guitar strap.
2. Position the mounting brackets over the holes on the sides of the receiver
and secure to the receiver with the screws from Step 1 (Figure 5).
6. Antenna. For best operation, the antenna must hang vertically, it should not
be coiled or bundled.
7. Audio Gain Control. Provides audio level adjustment to accommodate dif-
ferent sound sources.
8. Battery Compartment. Access to the battery.
RACK–MOUNTED RECEIVER
FIGURE 5
3. Secure the assembly to a standard audio equipment rack with four screws
(Figure 6).
INSTALLING RECEIVER IN A RACK
FIGURE 6
4
5
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4. If the antennas are to be remote mounted, insert the supplied plastic plugs
into the holes on the front of the brackets (Figure 7).
CONNECTING THE RECEIVER
There are two ways to connect the receiver to a mixer or a karaoke unit:
Two Independent Channels (Figure 9)
LX88-II
BACK
INSTALLING THE HOLE PLUGS
FIGURE 7
AUDIO MIXER
or KARAOKE
UNIT
NOTE: If you install the receiver in a rack mount, we recommend you front
mount or remote mount your antennas.
CONNECTING THE POWER SUPPLY
AC ADAPTER (PS20E)
1. Connect the ac adapter to the POWER jack on the rear panel of the receiver.
2. Plug the ac adapter into an appropriate power outlet.
CONNECTING SEPARATE CHANNELS
FIGURE 9
Connect the receiver outputs for channels 1 and 2 to the mixer or karaoke unit
CONNECTING THE ANTENNAS
inputs using balanced, 2–conductor, shielded cables with 3-pin XLR connec-
1
There are several ways the antennas can be connected to the receiver.
tors, or unbalanced, single–conductor, shielded cables with / -inch phone
4
plugs.
• When used as a stand-alone unit, attach the supplied quarter-wave antennas to
the antenna connectors on the receiver back panel. For best performance, the
receiver antennas should point straight up (Figure 8).
Two Channels Mixed Into One (Figure 10)
LX88-II
BACK
AUDIO MIXER
or KARAOKE
UNIT
AC ADAPTER (PS20E)
INSTALLING THE ANTENNAS
FIGURE 8
• If you wish to front mount the antennas, ask your Shure dealer for information
on the WA503 Front Mount Conversion Kit.
CONNECTING MIXED CHANNELS
FIGURE 10
• If you wish to remote mount the antennas, ask your Shure dealer for informa-
1
tion on the WA380 1/ -Wave telescoping antennas or WA490 / -Wave cable
Connect the Mixed Channels output to the mixer or karaoke unit input using
2
2
1
antennas and a WA421 cable extension kit.
an unbalanced, single-conductor, shielded cable with a / -inch phone plug.
4
6
7
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LX2 HAND-HELD MICROPHONE TRANSMITTER SETUP
Battery Installation (Figure 11)
Operating the LX2 Hand-Held Microphone Transmitters (Figure 13)
1. Press the POWER switch on the LX88-II receiver ON.
1. With the transmitter PWR ON/OFF switch in the OFF position, hold the upper
part of the transmitter and unscrew the battery cover.
2. Slide the transmitter POWER ON/OFF switch to the PWR position. Check the bat-
tery level. See Checking the Transmitter Battery.
3. Check the RF indicator on the LX88-II receiver to see if the radio signal is
being received.
4. Slide the transmitter ON/MUTE switch to the ON position and begin speaking
or singing.
NOTE: If the red PEAK light on the receiver does not flicker during the loud-
est sounds, the transmitter gain may need to be increased. See the Trans-
mitter Audio Gain Adjustment section.
5. During the performance or presentation, slide the ON/MUTE switch to the
MUTE position when the microphone is not being used.
LX2 MICROPHONE-TRANSMITTER BATTERY INSTALLATION
FIGURE 11
6. When the performance or presentation is over, slide the transmitter POWER
ON/OFF switch to the OFF position to conserve battery power.
2. Install a fresh 9V alkaline battery (DURACELL MN1604 recommended).
Make sure the battery terminals match the terminals in the transmitter.
3. Replace the battery cover.
LX2
Installing the Anti–Roll Device
TRANSMITTERS
The rubber anti-roll device prevents hand-held microphones from rolling off
onto the ground when they are set down on a flat surface, such as a table or
speaker cabinet. The anti-roll device proves an important safeguard in stage si-
tuations where the LX2 may be used by inexperienced microphone handlers.
To install the anti-roll device, simply slip it over the microphone handle and
slide it up so that it is positioned just below the label under the microphone grille,
as shown in Figure 12.
LX88-II
RECEIVER
LX2 HAND–HELD MICROPHONE SYSTEM OPERATION
FIGURE 13
ANTI-ROLL DEVICE INSTALLATION
FIGURE 12
8
9
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NOTE: The LX1 body-pack system is designed for use with other equipment
which is not included, such as lavalier microphones, guitars, headset micro-
phones, etc. See your Shure dealer for details on ordering the proper equip-
ment for your needs.
BODY-PACK TRANSMITTER SETUP
LX1 Body-Pack Transmitter Battery Installation (Figure 14)
-+
1. Clip the LX1 body pack transmitter to your belt or guitar strap.
2. Connect the lavalier microphone, headset or instrument adapter cable to the
body–pack transmitter (Figure 16).
3. Press the POWER button on the LX88-II receiver ON.
4. Turn the transmitter POWER switch ON. Check Power/Battery fuel gauge.
5. Check the RF Signal Indicator on the LX88-II receiver to see if the RF
LX1 BODY–PACK TRANSMITTER BATTERY INSTALLATION
signal is being received.
FIGURE 14
1. With the transmitter POWER ON/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
recommended). Observe proper battery polarity (“+/–”).
MICROPHONE CABLE OR
WA302 INSTRUMENT ADAPTER
CABLE
3. Close Battery compartment cover.
Operating LX1 Body-Pack Transmitters (Figure 15)
WH10
HEADSET
WM98 MIC
& A98KCS
HORN MOUNT
LX1 BODY-PACK TRANSMITTER CABLE CONNECTION
FIGURE 16
LAVALIER
MIC
6. Slide the transmitter ON/MUTE switch to the ON position and begin speaking
or playing your instrument.
WA302 INSTRUMENT
ADAPTER CABLE
NOTE: If the red PEAK light on the receiver does not flicker during the loud-
est sounds, the transmitter gain may need to be increased. See the Trans-
mitter Audio Gain Adjustment section.
LX88-II
RECEIVER
7. During the performance or presentation, slide the ON/MUTE switch to the
MUTE position when the system is not being used.
8. When the performance or presentation is over, slide the transmitter POWER
ON/OFF switch to the OFF position to conserve battery power.
LX1 BODY–PACK SYSTEM SETUP AND OPERATION
FIGURE 15
10
11
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or never on, the transmit audio level may require adjustment. Use the gain con-
trols as follows to adjust the equipment for the best sound quality.
CHECKING THE TRANSMITTER BATTERY
Battery Life Indicators
Remaining Transmitter
Operating Time*
6 to 20 hours
4 to 6 hours
To adjust the audio gain, locate the transmitter audio gain control and use the
supplied screwdriver to adjust the control.
Green
Green and Amber
Amber
• If the PEAK light is always on, decrease the audio gain by turning the gain con-
trol counter–clockwise (while the vocalist is singing or the musical instrument
is being played) until the PEAK light on the receiver flickers only occasionally.
2 to 4 hours
Red
1 hour or less
• If the PEAK light is never on, increase the audio gain by turning the gain control
clockwise (while the vocalist is singing or the musical instrument is being
played) until the PEAK light on the receiver flickers only occasionally.
* Estimated operating time assumes the use of a fresh 9 V alkaline battery (Duracell MN1604).
NOTE: The above battery life indicator readings apply for 9V alkaline batter-
ies ONLY. Transmitter operating time for rechargeable 8.4V nicad batteries
vary with type, brand and number of times the battery has been used. Actual
operating times for rechareable batteries are not predictable.
RECEIVER SQUELCH ADJUSTMENT (FIGURE 18)
WARNING: Batteries inside transmitters in long-term storage may corrode
and leak acid, causing damage to the transmitter. For long-term storage,
remove batteries from the transmitter.
SQUELCH
DECREASE
INCREASE
TRANSMITTER AUDIO GAIN ADJUSTMENT (FIGURE 17)
DECREASE GAIN
LX1
LX2
DECREASE
GAIN
INCREASE GAIN
LX88-II RECEIVER SQUELCH CONTROL ADJUSTMENT
FIGURE 18
INCREASE
GAIN
The receiver squelch control is factory preset at the 12 o’clock position
for optimum 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 re-
ceiver to demand a higher quality signal (less noise before muting), but it reduces
the operating range.
TRANSMITTER AUDIO GAIN ADJUSTMENT
FIGURE 17
The transmitter audio gain control has been factory preset to provide satisfac-
tory output. However, if the PEAK light on the LX88-II receiver is constantly on
• To lower the squelch threshold, rotate the control counterclockwise. This al-
lows a lower quality signal through (more noise before muting), but it extends
the operating range.
12
13
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TIPS FOR GETTING THE BEST PERFORMANCE
SPECIFICATIONS
• Maintain a line-of-sight between the transmitter and receiver antennas.
• Keep the receiver and antennas away from large metal objects.
• Avoid placing the receiver near computers or other RF generating equipment.
• Point the antennas straight up.
RF Carrier Frequency Range
169.445 to 221.350 MHz
Working Range
100 m (approximately 300 ft) under typical conditions.
Audio Frequency Response
• Avoid placing the receiver in the bottom of an equipment rack unless the an-
50 to 15,000 Hz, ±2 dB.
tennas are remotely located.
• Use the proper receiver antennas. / -wave antennas can be used if mounted
directly on the receiver or front mounted on the rack ears using the WA503
Audio Output Level (±15 kHz deviation, 1 kHz tone)
XLR connector (into 600 Ω load): –20 dBV (mic)
1
4
1
/ inch connector (into 3 kΩ load) –8.8 dBV (Hi Z)
4
1
4–
:
Front Mount Conversion Kit; / -wave or other ground-plane-dependent an-
2
1
/ inch connector (into 3 kΩ load) –18dBV (mix)
:
tennas must be used if antennas are remotely located.
Gain Adjustment Range
LX1: 40 dB
TROUBLESHOOTING
LX2: 25 dB
Impedances
LX1 (input): 1 MΩ
LX88-II (output): 600 Ω (XLR); 5 kΩ ( / -inch phone jack)
RF Power Output
LX1, LX2: 50 mW maximum (complies with FCC and IC regulations)
RF Sensitivity
–101 dBm, typical
Audio Polarity
Positive pressure on microphone diaphragm (or positive voltage applied to tip
of WA302 phone plug) produces positive voltage on pin 2 with respect to pin 3
of low impedance output and tip of high impedance / -inch output.
System Distortion (ref. ±15 kHz deviation, 1 kHz modulation)
0.7%
Power Requirements
LX1, LX2: 9V alkaline battery (Duracell MN1604 recommended). 8.4V Nicad (re-
chargeable) are optional but not recommended.
LX88-II: 12 Vdc (PS20, 120Vac; PS20E, 230 Vac Power Supply)
Current Drain
LX1: 31 mA average (40 mA max), LX2: 30 mA average (35 mA max)
LX88-II: 160 mA average (195 mA max)
Operating Temperature Range
Some common problems and their solutions are identified in the table below.
If you are unable to solve a problem, contact your dealer.
1
Problem
Solution
4
No sound; RF light(s)
not glowing.
• Make sure the transmitter and receiver POWER
switches are ON.
• Check battery.
• Check receiver squelch setting.
• Check receiver antenna connection(s).
• Make sure antennas are in line of sight of
transmitter.
1
4
No sound; RF and Audio Level • Turn up receiver audio VOLUME control.
meter lights glowing.
• Check for proper connection between receiver
and karaoke unit.
• Talk into microphone and observe receiver audio
level lights. If they glow, the problem is
elsewhere in the sound system.
Received signal is noisy or con- • Check battery.
tains extraneous sounds with
transmitter on.
• Remove local sources of RF interference.
• If using a guitar or other instrument, check
connections.
• Two transmitters may be operating on the same
frequency. Locate and turn one off.
-20° to 50° C (-4° to 122° F). NOTE: Battery characteristics may limit this
range.
• Signal may be too weak. Reposition antennas. If
possible, move them closer to transmitter.
Overall Dimensions
LX1: 82.6 mm H x 63.5 mm W x 26.2 mm D (3 / x 2 / x 1 / in.)
LX2/58: 241 mm L x 50.8 mm Dia. (9 / x 2 in.)
LX88-II: 44 mm H x 349 mm W x 194mm D (1 3/4 x 13 3/4 x 7 5/8 in)
Net Weight
LX1: 79.5 g (2.8 oz) without battery
LX2/58: 294.8 g (10.4 oz) without battery
LX88-II: 1.7 Kg (3.7 lbs)
1
1
1
4
2
32
1
2
Noise from receiver with trans- • Adjust receiver squelch control.
mitter off.
• Remove local sources of RF interference.
• Reposition receiver or antennas.
Momentary loss of sound as • Reposition receiver and perform another
transmitter is moved around per-
forming area.
“walkthrough” test and observe the RF
indicators. If audio dropouts persist, mark these
“dead spots” in performing area and avoid them
during performance.
Certification
LX1, LX2: Type-accepted under FCC Parts 90 and 74; IC certified under
TRC-78
14
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FURNISHED ACCESSORIES
LICENSING INFORMATION
Changes or modifications not expressly approved by Shure Brothers Inc.
could void your authority to operate the equipment. Licensing of Shure wireless
microphone equipment is the user’s responsibility, and licensability depends on
the user’s classification and application, and on the selected frequency. Shure
strongly urges the user to contact the appropriate telecommunications authority
concerning proper licensing, and before choosing and ordering frequencies
other than standard frequencies.
Receiver Rack Mount Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53A8425
Hardware Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90TZ1371
Swivel Adapter (hand-held only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WA370A
Anti-Roll Device (hand-held only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66A4083
OPTIONAL ACCESSORIES
Microphone Adapter Cable (LX1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WA310
Switchcraft TA4F Female 4-Pin Connector (LX1) . . . . . . . . . . . . . . . . . WA330
WARRANTY INFORMATION
In-Line Audio Switch (LX1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WA360
Shure Incorporated (“Shure”) hereby warrants that these products will be free
from defects in material and workmanship for a period of one year from the date
of purchase. At its option, Shure will repair or replace the defective product and
promptly return it to you, or refund the purchase price. Retain proof of purchase
to validate the purchase date and return it with any warranty claim. If you believe
this product is defective within the warranty period, carefully repack the unit, in-
sure it, and return it postpaid to:
1
/ -Wave Telescoping Antenna (169–185 MHz) . . . . . . . . . . . . . . . . WA380A*
2
1
1
/ -Wave Telescoping Antenna (185–200 MHz) . . . . . . . . . . . . . . . . WA380B*
2
/ -Wave Telescoping Antenna (200–230 MHz) . . . . . . . . . . . . . . . . WA380C*
2
Antenna/Power Distribution System, 120 Vac . . . . . . . . . . . . . . . . . . . WA404
Antenna/Power Distribution System, 230 Vac . . . . . . . . . . . . . . . . . . WA404E
1
1.8 Meter (6 ft.) Receiver-Mixer Cable ( / ” phone to XLR) . . . . . . . . WA410
4
6.1 Meter (20 ft.) Antenna Extension Cable . . . . . . . . . . . . . . . . . . . . . WA421
Antenna Rack Mount Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WA440
Passive Antenna Splitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WA470
Shure Incorporated
Attention: Service Department
222 Hartrey Avenue
Evanston, IL 60202-3696 U.S.A.
Telephone: (847) 866-5730
1
/ -Wave Cable Antenna (169–185 MHz) . . . . . . . . . . . . . . . . . . . . . . WA490A
2
1
/ -Wave Cable Antenna (185–200 MHz) . . . . . . . . . . . . . . . . . . . . . . WA490B
2
1
/ -Wave Cable Antenna (200–216 MHz) . . . . . . . . . . . . . . . . . . . . . . WA490C
2
Single Receiver Front-Mount Antenna Conversion Kit . . . . . . . . . . . . WA503
*Includes wall-mounting bracket for remote antenna placement
For service outside the United States, return the product to any authorized
Shure Distribution Center.
All claims of defects or shortage should be directed to the above address.
Please furnish model number, operating frequency, and date, place and proof of
purchase (such as a copy of your sales receipt) to establish warranty. Your letter
should include all pertinent details including applicable model or part numbers
and a brief description of the problem. Do not mail any units or parts to Shure
unless requested to do so by Shure’s Service Department. Any returned items
must have prior authorization. Unauthorized returns are delayed in handling;
these delays can be avoided by contacting Shure in advance and furnishing the
necessary information.
REPLACEMENT PARTS
SM58 Cartridge with Grille (LX2/58) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R158
AC Adapter . . . . . . . . . . . . . . . . . . . . . . . . . PS20 (120 Vac)/PS20E (230 Vac)
Matte Silver Grille (LX2/58) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RK143G
Belt Clip (LX1 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53A8247A
1
/ -Wave Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90A8380
4
Shure reserves the right to make design changes and product improvements
on any previously manufactured products. Shure also reserves the right to ship
new and/or improved products which are similar to the form, fit and function of
the originally ordered products.
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