LEM L3000SD Manuale utente
The lighting flash with arrowshad symbol within an
equilateral triangle is intended to alert the user to the
presence of uninsulated “dangerous voltages” within the
product’s enclosure, that may be of sufficient magnitude to
constitute a risk of electric schok to persons.
The excalamation point within an equilater triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanyng the appliance.
IMPORTANT SAFETY INSTRUCTIONS
INSTRUCTIONS PERTAINING A A RISK OF FIRE, ELECTRIC SHOCK OR INJURY A PERSONS
WARNING - When using electric products, basic precautions should always be folowed, including the following.
1. Read all the SAFETY INSTRUCTIONS before using the product.
2. A reduce teh risk of injury, close supervision is necessary when the product is used near children.
3. Do not use this product near water - for example, near a bathtub, washbowl. kitchen sink, in a wet basement
or near a swimming pool or the like.
4. This product in combination whit headphones or an amplifier, may be capable of producing sound levels
that could cause permanent hearing loss. Do not operate for a long period of time at high volume level or at
level that is uncomfortable. If you experience any hearing loss or ringing in the ears, you should consult an
audiologist.
5. This product should be located so that its location or position does not interfere with its proper ventilation.
6. This product should be located away from heat sources such as radiators, hest register or other product
that produce heat.
/. The product may be connected a a power supply oly ot the type described on the operating instructions or
as marked on the product.
8. The product may be equipped with a polarized line plug (one blade wider then the other). This is a safety
feature. If you are unable a insert the plug into the outlet, contact an electrician a replace your obsolete
outlet. Do not defeat the safety purpose of the plug.
9. The power-supply cord of the product should be unplugged from the outlet when left unused for a long
period of time. When unplugging the power-supply cord, do not pull on the cord, but grasp it by the plug.
10. Care should be taken so that object do not fall and liquid are not spilled into the enclosure through
openings.
11. The product should be servived by qualified service personnel when:
A. The power-supply cord or the plug has been damaged; or
B. Objects have fallen, or liquid has been spilled into the product; or
C. The product has been exposed to rain; or
D. The product does not appear to operate normally or exhibits a marked change in performace; or
E. The product has been dropped or the enclosure damaged.
12. Do not attempt to service the product beyond that described in the user-maintenance instructions.
All other servicing should be referred to qualified service personnel.
13. WARNING - Do not place objects on the product’s power cord or place it in a position where anyone
could trip over, walk on or roll anything over it. Do not allow the product to rest on or to be installed over
power cords of any type. Improper installations os this type create the possibility of fire hazard and/or perso-
nal injury.
SAVE THESE INSTRUCTIONS
1
Warnings and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
The Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
The Transmitters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Handeld Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Bodypack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Contents
Contents
2
Warnings and Installation
✔ ✔
✔ ✔
✔ Connection to the mains supply
The unit is supplied with an external power supply. Before switching on the unit, make certain that the
mains voltage matches that shown on the power supply (a tolerance of up to ±10% is acceptable).
✔ ✔
✔ ✔
✔ Switching on and off
CAUTION: before switching on or off, make certain the sound system’s amplifiers are off: this will avoid
signal peaks, which are annoying and sometimes dangerous (particularly for speaker enclosures).
✔ ✔
✔ ✔
✔ Connecting and preventing or identifying interference
First of all, check that the apparatus is installed in a place free from industrial or RF (radio frequency)
interference. Avoid installing your equipment very near radio or TV sets, mobile phones, etc., as these
can cause noisy interference.
When connecting the other parts of your sound system, watch out for the so-called “ground loops”, which
could cause hum and jeopardize the products’s excellent Sound-to-Noise and low distortion characteristics.
The best way (even if not always feasible) to avoid ground loops is to connect the electric ground of all
the equipment to a single central point (“star” system). In this case, the central point can be the mixer.
✔ ✔
✔ ✔
✔ Protection and maintenance
Don’t force knobs or switches: these are designed and manufactured to respond to light pressure and
could be damaged if used with excessive force.
Take care of your connector cables, a very frequent cause of small/big problems. Always grip them by
the connector, avoid pulling them forcefully and wind them without forming knots or sharp bends: they’ll
last longer this way, and be more reliable, which is a definite advantage.
Avoid exposing the product to strong direct sunlight, high temperatures or intense vibrations, in very dusty
or particularly damp surroundings or, even worse, in the rain: this will help to avoid the risk of faulty
operation, deterioration or even electric shocks and fires.
The product is built in shock-resistant material. Nevertheless, protect it during transport with a flight-case
to avoid the risk of any casual accidents.
When you’ve finished using the apparatus, it’s always advisable to protect it from dust, but any dust that
does form should be removed using a cloth or a soft brush. Never use alcohol, acetone or any solvents.
The effect does not require any other maintenance.
✔ ✔
✔ ✔
✔ In the event of breakdown
All user-adjustable parts are external and easily accessed.
In the event of a breakdown, do not open the apparatus, but contact the nearest Generalmusic/Lem
Service Centre.
✔ ✔
✔ ✔
✔ Keeping the documentation
Keep this user’s manual for future consultation. Also remember that the effect will get a better price on
the secondhand market if (as well as being in good condition) it has its original documentation and
packaging.
Warnings and Installation
3
Introduction
LEM L3000-SD is an efficient, high-quality wireless microphone system, with an user-friendly control set.
The use of the UHF band (780-960MHz) enables the majority of interference problems afflicting lower
bands to be overcome. Shorter waves are less susceptible to reflection, so tend to saturate the area
round the transmitter better. The UHF band is therefore more suited to critical situations (stages or clubs
with a lot of lights and amplifiers) where reflections can cause problems for VHF sound waves.
The transmitter/receiver connection frequency has been pre-set on our premises and it is showed:
- on the products package;
- on the rear panel of the receiver;
- on the battery space inside the hanheld microphone;
- on the back of the bodypack transmitter.
The L3000SD receiver has two antennas and it makes use of the SWITCHING DIVERSITY technology.
This technology enables greater reliability and coverage than single antenna systems. In real time, the
circuitry automatically selects the antenna receiving the best signal, reducing breakdown and interference
risks. Switching between the two antennas, controlled by an opto-coupler, is immediate and totally noise-
free.
The system L3000SD comprises a receiver and four types of transmitter.
Introduction
RECEIVER
HANDHELD MICROPHONE
4
The transmitters are powered by normal alkaline batteries. The circuitry has been designed to reduce
current absorption to a minimum, ensuring longer operating times at considerably lower costs.
The receiver is powered by a normal 12V external power supply.
Introduction
BODYPACK with LAVALIER and HEADSET microphones and GUITAR CABLE
SERIES L3000SD
Component Name Description
Receiver L3000SD-RX UHF SWITCHING DIVERSITY receiver
Handheld microphone L3000-HTX UHF Handeld microphone
Bodypack transmitter L3000-BTX UHF Bodypack transmitter
Lavalier microphone LT-1 Lavalier microphone (to be used with bodypack)
Headsetmicrophone ST-1 Headsetmicrophone (to be used withbodypack)
Instrumentcable GT-1 Instrumentcable (to be used withbodypack)
5
Getting Started
To use the L3000-SD wireless microphone immediately, just carry out the following simple procedure:
1 - Connect the receiver audio output to the line input of a mixer or an amplifier.
2 - Connect the power supply to the DC IN socket and switch on the unit.
3 - Adjust the Squelch control until any interference is eliminated, obtaining an output signal free
from background noise.
4 - Switch on the transmitter (first fitting the batteries if they’re not already installed).
5 - Adjust receiver output volume and (if a bodypack transmitter is being used) transmitter volume.
Use the LED displays on the front panel to optimize input and output levels.
Getting Started
6
The Receiver
The Receiver
Front Panel
POWER
Power switch.
ON
LED indicating when the unit is on.
A & B
These two LEDs indicate which antenna the receiver’s Switching Diversity circuitry has selected.
AF-LEVEL
LED bargraph indicating audio output level.
When the red LED illuminates, this means the level is too high and will consequently distort. Adjust the
receiver’s volume control (and the bodypack transmitter’s, if used) in order to obtain the highest possible
distortion-free level.
RF-LEVEL
LED bargraph indicating receiver input level.
If the red LED illuminates, the signal being received is at maximum. If a bodypack transmitter is being
used, transmitter volume can be adjusted to obtain the highest possible distortion-free level.
VOLUME
Receiver output volume control potentiometer.
ANT-A & ANT-B
Connectors for connecting antenna A and B of the receiver.
7
Rear Panel
FUSE
Power supply circuit fuse.
In the event of a short-circuit, must be replaced with another of the same type and value.
DC INPUT
Connector for connection to the external power supply.
SQUELCH
Trimmer for controlling the noise threshold.
Enables to eliminate any interference on the signal. Turn the trimmer with a screwdriver until any unwanted
noise is eliminated.
UNBALANCED OUT
Unbalanced Jack output connector.
BALANCED OUT
Balanced XLR output connector.
The Receiver
8
The Transmitters
The Transmitters
Handheld Microphone
POWER SUPPLY LED
Shows that the microphone is on.
If the LED doesn’t light up when the microphone is switched on, replace the battery.
SWITCH
Switch for switching the microphone on and off.
For longer battery life, always switch off the microphone when not in use.
Battery replacement
When installing a new battery, switch off the microphone by setting the switch at OFF.
Use only 9V alkaline batteries.
Good quality batteries normally last on average 6-8 hours.
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