3
UWP SERIES COMMON FEATURES
Stable Transmission and Reception
The UWP Series Wireless Microphone System uses three core technologies to provide stable
transmission and reception:
PLL Synthesized System
Key to achieving stable transmission and reception is the use of a stable carrier signal to avoid
interference with other frequency channels and to allow the selection of a preferred channel from
multiple frequencies. The UWP Series achieves this by using a UHF PLL (Phase Locked Loop)
frequency synthesized system, which provides accurate carrier signal frequencies.
This system is used in both the transmitters and tuners, so that a stable carrier is generated at the
transmitter, and accurately tuned in at the tuner. This PLL-controlled system provides highly stable,
user-selectable frequencies in increments of 125 kHz.
Space Diversity Reception System
Typically, wireless microphone transmission systems can be subject to reception interruptions (signal
dropout), but the UWP Series reduces this to a minimum. By utilizing a space-diversity reception
system, it achieves stable reception by using dual-antenna inputs/reception circuits. These receive
signals over two different paths and automatically select the stronger RF signal for output. The
space diversity reception system is adopted in all UWP tuners – the portable tuner, half rack-size
tuner and tuner module alike. What´s more, the antennas of the portable and half-rack-size tuners
each allow for angle adjustments, which help to further eliminate signal dropout.
Tone Squelch Circuitry
When operating a wireless microphone system, it is essential that the tuner not pick up carrier
signals transmitted from other systems. In order to avoid this, the UWP Series transmitters transmit
a 32 kHz pilot-tone signal along with the audio signal. The tuner´s squelch circuit recognizes this
tone signal, and outputs the audio signal only when this tone signal is received. This function
prevents the output of unwanted signals and noise from other signal transmissions in the air, as
well as the RF noise and popping noise that occur when the transmitter is powered on or off.
Pre-Programmed Operating Frequencies
The transmitters and tuners included in the UWP Series incorporate preprogrammed frequencies
that meet the wireless-communication regulations of each country. The UWP Series operates within
the following frequency ranges:
• U models: 758 MHz to 782 MHz or 782 MHz to 806 MHz (188 selectable frequencies)
• CE models: 798 MHz to 822 MHz or 838 MHz to 862 MHz (189 selectable frequencies)
• AU models: 792 MHz to 806 MHz (102 selectable frequencies)
Simultaneous Multi-Channel Operation
The UWP Series allows simultaneous operation of up to 16 wireless microphones. Optimum
combinations of practically tested, interference-free frequencies are stored in the UWP tuners. By
using the pre-programmed frequency groups, users can easily choose interference-free frequencies
for the transmitters and tuners, simplifying the task of system setup.
