Overview
Features
The WRT-822B is a transmitter for a UHF synthesized
wireless microphone system to be used for broadcast
The features of the WRT-822B are:
or movie production purpose. This transmitter is
Phase Locked Loop (PLL) synthesized system
suitable for Electronic News gathering (ENG) and
Compact and lightweight
Electronic Field Production (EFP).
Remote battery alarm on tuner
Operation powered by easily available batteries
The microphone/transmitter and tuner of the wireless
LCD for coordinated operation control
microphone system are classified by frequency band.
Saved channel and input attenuation settings
A 24-MHz frequency band is assigned to each
Highly reliable electronic attenuator
microphone/transmitter and tuner model. In building
Compatibility with Sony lavalier microphone
a UHF wireless microphone system, be sure to
RF carrier with tone signal
combine a microphone/transmitter and a tuner having
Wide dynamic range and low noise
the same wireless channel (frequency).
Precautions
The unit is designed for use in ambient temperature
Lengthy use of the unit in such places or not cleaning
ˎ
range of 0 °C to 50 °C (32 °F to 122 °F).
it after its use in such places may shorten its life.
Do not place the unit on or near heat sources, such
When cleaning the unit, never use organic solvents
ˎ
ˎ
as lighting equipment, power amplifiers, or in a place
such as thinners or benzine, which will damage the
subject to direct sunlight or excessive moisture. In
finish of the unit.
such places, the external finish or internal parts of
The unit has been factory adjusted precisely. Do not
ˎ
the unit may be damaged.
tamper with its internal parts or attempt to repair it.
If the unit is used in a very humid or dusty place or
When defective conditions are encountered, batteries
ˎ
ˎ
in a place subject to expose to an active or corrosive
inside the unit may produce heat. If this happens, do
gas, clean its surface as well as the connectors with a
not touch the batteries directly with your hands.
dry, soft cloth soon after use.
Specifications
Transmitter and modulator section
General
Oscillator
Crystal controlled PLL
Operating temperature
synthesizer
0 °C to 50 °C (32 °F to 122 °F)
Type of emission
F3E
Storage temperature
Carrier frequencies Model available in USA:
–30 °C to +60 °C
U3032 model: 566 to 590 MHz
(–22 °F to +140 °F)
U4244 model: 638 to 662 MHz
Dimensions
63 × 103 × 17 mm (w/h/d)
Model available in Europe:
(2
/
× 4
/
×
/
inches)
1
1
11
2
8
16
CE38 model: 606 to 630 MHz
Mass
Approx. 145 g (5.1 oz)
CE62 model: 798 to 822 MHz
including batteries
Operating frequency band
24 MHz
Supplied accessories
Refer to the “Sony Wireless
Operating Instructions
Microphone System Frequency
Model available in USA (3)
List” supplied with this manual.
Model available in Europe (4)
RF power output
20 mW (50-ohm load)
Sony wireless Microphone System Frequency List (1)
Frequency stability Within ±15 kHz
Soft case (1)
Tone signal
32.768 kHz
Battery condition signal
Optional accessories
32.782 kHz
Lavalier microphones
Type of antenna
/
-wavelength wire
1
ECM-44BC, ECM-66BC, ECM-77BC, ECM-88BC,
4
Pre-emphasis
50 µs
ECM-166BC, ECM-322BC
Deviation
±5 kHz
Microphone cable
(–60 dBv, 1 kHz input )
EC-1.5CF
Frequency response
70 to 15,000 Hz
Design and specifications are subject to change
Signal-to-noise ratio
without notice.
60 dB or more (A-weighted,
modulation frequency 1 kHz,
with ±5 kHz deviation at
WRR-855S)
Audio attenuator
0 to 21 dB, variable in 3-dB
steps
Input level
–60 dBv at audio attenuator 0 dB
Maximum input level
–3 dBv at audio attenuator 21 dB
Power section
Power requirements
3.0 V DC (two LR6/size AA
alkaline batteries)
Battery life
Approx. 6 hours at 25 °C
(77 °F) with Sony LR6 alkaline
batteries
......................................................................................................
0 dBv = 1 Vrms
Error Messages
When a problem occurs, one of the following error message may appear on the display.
Measures
Messages
Contents
ERROR 11
An error occurred in backup memory data.
Contact your Sony dealer.
ERROR 21
The PLL synthesized circuit is in trouble.
ERROR 31
The battery voltage exceeds the allowable value.
Use the specified batteries.
Notes on Microphone System Operation
To operate with two or more channels, maintain a
Powering the transmitter on without checking
ˎ
ˎ
distance of at least 30 cm (one ft.) between each pair
the channel selection first may interfere with the
of transmitters.
operation of other microphones/transmitters, if the
For details of operation with two or more channels,
current setting is already being used.
refer to the Operating Instructions for the WRR-855S/
To prevent noise generation, keep the microphones
ˎ
862, etc.
and transmitters at least 3 m (10 feet) away from the
Ensure that the tuners set to channels not being used
antennas when the system is operated using a group
ˎ
which allows selection of up to 11 channels, and at
are either turned off or set to the minimum output
level.
least 6 m (20 feet) away when using a group which
When powering the transmitter on or off, to keep
allows selection of 12 channels.
ˎ
the noise to a minimum, set the audio output level
When there is a strong interference signal around
ˎ
from the tuner or mixer to a minimum.
the microphone system, such as an interference
caused by an active handyphone, noise may occur on
the microphone system.