Sony 798 MHz to 822 MHz - Manual (Page 27)

27
Recommended Wireless
Microphone Systems for
DVCAM
The UWP Series of wireless microphones have two spe-
cific packages designed for portable/camera use. Each
package has been carefully compiled to meet with a
range of operational requirements that are able to adapt
to all your operational needs. The UWP Series excels in
transmission stability. Sophisticated wireless technolo-
gies, developed for top-of-the-line Sony wireless micro-
phone systems, have been incorporated, including the
UHF PLL-synthesised system, space-diversity reception
and a tone squelch function. These capabilities are typ-
ically found only on high-end wireless systems.
Features
Stable Transmission and Reception
The UWP Series Wireless Microphone System uses
three core technologies to provide stable transmission
and reception:
PLL Synthesised 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 synthesised system, which pro-
vides the use of 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 frequen-
cies in increments of 125 kHz.
Space Diversity Reception System
In general, wireless microphone transmission systems
can be subject to reception interruptions (signal
dropout), but the UWP Series reduces this to a mini-
mum. By utilising a space diversity reception system, it
achieves stable reception by using dual-antenna
inputs/reception circuits that receive signals over two
different paths and automatically selecting the stronger
RF signal for output. The space diversity reception sys-
tem 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 helps to
further eliminate signal dropout.
Tone Squelch Circuitry
When operating a wireless microphone system, it is
essential that the tuner does not pick up carrier signals
transmitted from other systems. In order to avoid this,
the UWP Series handheld microphone and portable
transmitter transmit a 32-kHz pilot-tone signal along
with the audio signal. The squelch circuit of the UWP
Series tuners recognises this tone signal, and will output
the audio signal only when this tone signal is received.
This function virtually prevents the output of unwanted
signals or 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: 798 MHz to 822 MHz or 838 MHz to 862 MHz
(189 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, simpli-
fying the task of system setup.
WIRELESS MICROPHONE SYSTEMS
Photo shows portable tuner mounted on a camera.