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CAUTION:
To reduce the risk of electric shock, do not remove cover (or back). There are no user serviceable parts
inside. Maintenance and repairs should be exclusively carried out by qualified service personnel.
The warning triangle with lightning symbol indicates dangerous uninsulated voltage inside the unit, which may cause an
electrical shock.
The warning triangle with exclamation mark indicates important operating and maintenance instructions.
Warning! This symbol indicates a hot surface. Certain parts of the housing can become hot during operation. After use, wait for a
cool-down period of at least 10 minutes before handling or transporting the device.
CAUTION! HIGH VOLUMES IN AUDIO PRODUCTS!
This device is meant for professional use. Therefore, commercial use of this equipment is subject to the respectively applicable national accident
prevention rules and regulations. As a manufacturer, Adam Hall is obligated to notify you formally about the existence of potential health risks.
Hearing damage due to high volume and prolonged exposure: When in use, this product is capable of producing high sound-pressure levels (SPL)
that can lead to irreversible hearing damage in performers, employees, and audience members. For this reason, avoid prolonged exposure to
volumes in excess of 90 dB.
NOTE:
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
INTRODUCTION
LD Systems U500 CS 4 - 4-channel wireless conference system
The U500
®
microphone stations feature a gooseneck condenser microphone with a hyper cardioid pattern. The heavy table base has a
button to turn on, off and mute, as well as an attenuation control and a switchable 130 Hz high-pass filter, which effectively reduces the
proximity effect and structure-borne sound in addition to the XLR microphone connector with 28 V phantom power. The high-contrast OLED
display shows the radio frequency, battery status, microphone station number, group and channel. The transmission range is 60 Hz - 16
kHz.
For fast and comfortable setting up of the system, the 4-channel receiver of the U500® conference system boasts an automatic frequency
and channel search, infrared synchronisation, a digital encoder and 4 buttons for direct access to the individual channels. The high-contrast
OLED display provides a complete overview of all functions and settings, such as the strength of the audio and radio signal or priority and
battery status of the microphone stations. To suppress crosstalk, feedback and comb filter effects, the number of microphones used at the
same time can be adjusted. The choice of automatic or manual gate setting and a pilot tone ensures top-notch sound quality and noise im-
munity of the U500® conference system. In addition to individual channel outputs, the receiver has a sum output; an access lock prevents
unauthorised changing of the settings, and the RS-232 interface allows integration into external control systems.
For system expansion, up to five U500® receivers can be daisy-chained and operated in master-slave mode: thus, up to 20 microphone
stations are available. The U500® conference system is available in three versions in the radio frequency ranges of 554 - 586 MHz,
662 - 694 MHz or 823 - 832 MHz + 863 - 865 MHz.
Wireless True Diversity UHF conference system
Automatic channel search
Automatic frequency search
Infrared frequency synchronisation of the receiver and microphone unit
Pilot tone
Priority circuit
Automatic and manual gate modes
Security lock
RS-232 interface for external control
