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3-206-989-13 (1)
UHF Synthesized
Transmitter
Sony Corporation 2002 Printed in Japan
Operating Instructions
WRT-8B
Owner’s Record
The model and serial numbers are located at
the rear of the unit. Record the serial number in
the space provided below. Refer to these
numbers whenever you call upon your Sony
dealer regarding this product.
Model No. WRT-8B Serial No.____________
Notice for customers in the
U.S.A.
Use of Sony wireless devices is regulated by the
Federal Communications Commission as
described in Part 74 subpart H of the FCC
regulations and users authorized thereby are
required to obtain an appropriate license.
You are cautioned that any changes or
modifications not expressly approved in this
manual could void your authority to operate this
equipment.
IMPORTANT NOTE: To comply with the FCC
RF exposure compliance requirements, no
change to the antenna or the device is
permitted. Any change to the antenna or the
device could result in the device exceeding the
RF exposure requirements and void user’s
authority to operate this device.
Notice for customers in Canada
Use of Sony wireless devices is regulated by the
Industry Canada as described in their Radio
Standard Specification RSS-123.
A licence is normally required. The local district
office of Industry Canada should therefore be
contacted. When the operation of the device is
within the broadcast band, the licence is issued
on no-interference, no-protection basis with
respect to broadcast signals.
Operation of this device is subject to the
following two conditions: (1) this device may not
cause interference, and (2) this device must
accept any interference, including interference
that may cause undesired operation of the
device.
The term “IC:” before the radio certification
number only signifies that Industry Canada
technical specifications were met.
Notice for customers in Europe
U.K. 854.125 - 862 MHz
Germany
798 - 822 MHz
Norway 800 - 820 MHz
Luxembourg
800 - 830 MHz, 854.125 - 862 MHz
Belgium 854.125 - 862 MHz
Denmark
800.100 - 819.900 MHz
France 470 - 830 MHz
Italy 800 - 820 MHz
Sweden 800 - 820 MHz
Switzerland
800 - 820 MHz
Finland 800 - 814 MHz
Iceland 800 - 814 MHz
Austria 774 - 790 MHz
Netherlands
774 - 782 MHz
• The unit is designed for use in ambient temperature
range of 0°C to 50°C (32°F to 122°F).
• Do not place the unit on or near heat sources, such
as lighting equipment, power amplifiers, or in a
place subject to direct sunlight or excessive
moisture. In such places, the external finish or
internal parts of the unit may be damaged.
• If the unit is used in a very humid or dusty place or
in a place subject to expose to an active or corrosive
gas, clean its surface as well as the connectors with a
dry, soft cloth soon after use.
Precautions
Overview
The WRT-8B is a transmitter for a UHF synthesized
wireless microphone system to be used for broadcast
or movie production purpose. This transmitter is
suitable for Electronic News gathering (ENG) and
Electronic Field Production (EFP).
The microphone/transmitter and tuner of the wireless
microphone system are classified by frequency band.
A 24-MHz (USA and Europe)/14-MHz (Australia)
frequency band is assigned to each microphone/
transmitter and tuner model. In building a UHF
wireless microphone system, be sure to combine a
microphone/transmitter and a tuner having the same
wireless channel (frequency).
Features
The features of the WRT-8B are:
–Phase Locked Loop (PLL) synthesized system
–Compact and lightweight
–Selectable RF power output: 50 mW and 10 mW
–Switchable input level and variable attenuator
–Remote battery alarm on tuner
–Operation powered by easily available batteries
–LCD for coordinated operation control
–Compatibility with Sony lavalier microphone
–RF carrier with tone signal
–Wide dynamic range and low noise
Lengthy use of the unit in such places or not
cleaning it after its use in such places may shorten
its life.
• When cleaning the unit, never use organic solvents
such as thinners or benzine, which will damage the
finish of the unit.
• The unit has been factory adjusted precisely. Do not
tamper with its internal parts or attempt to repair it.
Error Messages
When a problem occurs, one of the following error message may appear on the display.
Messages
ERROR 11
ERROR 21
ERROR 31
Contents
An error occurred in backup memory data.
The PLL synthesized circuit is in trouble.
The battery voltage exceeds the allowable value.
Transmitter and modulator section
Oscillator Crystal controlled PLL
synthesizer
Carrier frequencies Model available in USA:
758 to 806 MHz
Model available in Europe:
470 to 606 MHz
614 to 862 MHz
Model available in Australia:
792 to 806 MHz
Operating frequency band
Model available in USA and
Europe:
24 MHz
Model available in Australia:
14 MHz
Refer to the “Sony Wireless
Microphone System Frequency
List” supplied with this manual.
RF power output 50 mW/10 mW e. r. p.
Tone signal 32.768 kHz
Battery condition signal
32.782 kHz
Type of antenna
1
/
4
-wavelength wire
Pre-emphasis 50 µs
Deviation ±5 kHz
(–60 dBV, 1 kHz input, MIC)
±5 kHz
(–20 dBu, 1 kHz input, LINE)
Maximum deviation ±40 kHz
Frequency response
40 to 20,000 Hz
Signal-to-noise ratio
60 dB or more (A-weighted,
modulation frequency 1 kHz,
with ±5 kHz deviation at tuner)
Specifications
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 (50 mW)
Approx. 13 hours at 25°C
(77°F) with Sony LR6 alkaline
batteries (10 mW)
General
Operating temperature
0°C to +50°C (32°F to 122°F)
Storage temperature
–30°C to +60°C
(–22°F to +140°F)
Dimensions 63 × 83 × 17 mm (w/h/d)
(2
1
/
2
× 3
3
/
8
×
11
/
16
inches)
Mass Approx. 140 g (4.9 oz)
including batteries
Supplied accessories
Operating Instructions (1 set)
Sony Wireless Microphone System Frequency List (1)
Soft case (1)
Scribble sheet (supplied with European model only)
(1)
Battery case (1)
Microphone cable (1)
Optional accessories
Lavalier microphones
ECM-44BC, ECM-77BC, ECM-166BC, ECM-
310BC, ECM-350BC
Design and specifications are subject to change
without notice.
0 dBv = 1 Vrms
............................................................................................
Hereby, Sony Corporation, declares that this
WRT-8B is in compliance with the essential
requirements and other relevant provisions of
Directive 1999/5/EC.
Note:
In some countries additional frequency bands
may be used with the agreement of the national
authority.
Note for customers in Austria:
Before use, it is necessary to obtain individual
permission of the local telecommunications
spectrum authority.
Note for customers in Switzerland:
Before use, a request of concession for a
wireless microphone (Frequency Class 3) has to
be submitted to Bakom.
Note for customers in Finland:
To own and use, it is necessary to obtain an
individual licence of the Telecommunications
Administration Center.
Note for customers in Luxembourg:
Before any use of an equipment, the frequencies
required have to be, if necessary according to
the regulations in force, assigned prior to usage
by the “ILT”.
Note for customers in Italy:
The use of this product within Italy is subject to
article 334 of the Postal and
Telecommunications regulations.
Nota per i clienti in Italia:
L’uso del prodotto sul territorio italiano è
soggetto alle regolamentazioni del Codice
Postale e delle Telecomunicazioni art. 334.
Note for customers in Belgium:
Using this transmitter with 50 mW RF output
power is not allowed. Be sure to set the RF
output power to 10 mW.
Note for customers in Norway:
Using this transmitter with 50 mW RF output
power requires the frequency license.
Measures
Turn the transmitter OFF, then turn it
ON again to clear the backup memory.
Channel group is reset to 00
(European model only), channel is
reset to 01, and RF output power is
reset to H, respectively.
Turn the transmitter OFF, then turn it
ON again. If it does not work, contact
your Sony dealer.
Use the specified batteries.
Notes on Microphone System Operation
•
To operate with two or more channels, maintain a
distance of at least 30 cm (one ft.) between each pair
of transmitters.
For details of operation with two or more channels,
refer to the Operating Instructions for the WRR-802/
805/855/862, or WRU-8N with MB-8N, etc.
•
Ensure that the tuners set to channels not being used
are either turned off or set to the minimum output
level.
•
When powering the transmitter on or off, to keep the
noise to a minimum, set the audio output level from
the tuner or mixer to a minimum.
•
Powering the transmitter on without checking the
channel selection first may interfere with the
operation of other microphones/transmitters, if the
current setting is already being used.
•
To prevent noise generation, set the RF power
output to L (10 mW) when multiple channels are
used simultaneously, and keep the microphones and
transmitters at least 3 m (10 feet) away from the
antennas when the system is operated using a group
which allows selection of up to 8 channels, and at
least 6 m (20 feet) away when using a group which
allows selection of 9 channels.
For details on how to set the RF output power, see
“Changing the RF Output Power” on the reverse
side.
•
When there is a strong interference signal around the
microphone system, such as an interference caused
by an active handyphone, noise may occur on the
microphone system.