Sony WRT-808A User manual

3-866-919-21 (1)
WRT-808A
UHF
Synthesized Transmitter
1999 Sony Corporation [AU66]
Operating Instructions

2
Table of Contents
Precautions......................................................................... 2
Overview............................................................................. 3
Wireless Channels Selectable ........................................ 3
System Configuration .................................................... 3
Features .......................................................................... 4
Wireless Channel List ....................................................... 5
Parts Identification ............................................................ 6
Power Supply ..................................................................... 7
Channel Setting.................................................................. 8
Microphone System Operation ........................................ 9
Use of the Soft Case ......................................................... 11
Specifications..................................................... Back cover
•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 an active gas, clean its surface as well as
the connectors with a dry, soft cloth soon after use.
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.
Precautions

3
TV
channel
66
67
Frequency(MHz)
792.250 - 798.500b)
799.250 - 805.500b)
TV
System Configuration
The WRT-808A can be used with the WRR-802A/WRU-
806A UHF synthesized Diversity Tuner and also can be
used with the WRR-820A/840A/850A/855A UHF
Synthesized Diversity Tuner.
Sony 800 MHz band system models
a) For this models, the AN-820A UHF antenna and the WD-820A UHF
antenna divider are required.
b) When using the WRT-808A, 98 channels are selectable in frequency
band of 792.250-798.250MHz or 799.250-805.250MHz.
Transmitter or
microphone
WRT-805A
WRT-807A
WRT-808Ab)
WRT-810A
WRT-820A
WRT-822A
WRT-830A
WRT-860A
WRT-867A
The WRT-808A is a transmitter which converts a hand-held
dynamic microphone into a wireless microphone, ensuring
excellent sound quality of the microphone itself and
providing the convenience especially for Electronic News
Gathering (ENG), live and other Electronic Field Production
(EFP) applications. Combining with 800 MHz band Sony
UHF wireless microphone system, use this highly reliable
transmitter for broadcast and movie production purpose.
Wireless Channels Selectable
The transmitter and tuner of the wireless microphone system
are classified by frequency band.
A 792-806 MHz frequency band is assigned to the WRT-
808A/66 model, permitting it to operate on any of 98 carrier
frequencies in 125-kHz steps of Sony original channel plan
in the range of TV channels 66 and 67.
Note
The WRT-808A provides 98 channels as listed on page 5.
In building a UHF wireless microphone system, be sure to
combine a transmitter and a tuner having the same TV
channel number.
Overview
Frequency band
TV
Tuner
WRR-802A
WRR-805A
WRR-810A
WRR-820Aa)
WRR-840Aa)
WRR-850A a)
WRR-855A
WRR-860A
Model name

4
Features
Easy selection of 98 channels
The PLL synthesized system assures easy selection of 98
channels and full compatibility with Sony 800 MHz series
wireless microphone system.
Easy and reliable connection
The WRT-808A can be adapted to a wide variety of wired
microphone which has a XLR audio connector. The reliable
connection assures the noise-free operation.
Compact and lightweight
High density mounting technology enables this compact and
light weight transmitter, to allow you to move anywhere for
Electronic News Gathering (ENG) and Electronic Field
Production (EFP).
Operation powered by easily available batteries
Approximately four hours of continuous operation is
ensured with two AA-size (LR6) alkaline batteries. By
virtue of DC-DC converter, consistent output power is
assured over the life of the batteries.
Battery status information on both transmitter and
tuner
To avoid the battery failure, the WRT-808A shows the
battery status with the LED indication in green, red and
flashing. About one hour before the battery exhausted, the
WRT-808A gives the battery information to make the alarm
on the tuner WRR-802A/WRR-805A/WRR-850A/WRU-
806A.
LED indication of audio input
The AF/PEAK indicator allows you to comprehend the
condition of audio input level at a glance.
Continuous control of input attenuation
When an excessively strong audio signal is inputted, the
input level can be adjusted in the range of 0 to 50 dB
continuously.
When setting the 50 dB attenuation, the WRT-808A can
accept +4 dB (maximum 20 dB) line level input.
Selectable RF power output
You can select the RF output level either 50 mW or 10 mW
to suit the operating condition.
Overview

5
Channel Frequency(MHz) Channel Frequency(MHz)
66-26 795.375 67-26 802.375
66-27 795.500 67-27 802.500
66-28 795.625 67-28 802.625
66-29 795.750 67-29 802.750
66-30 795.875 67-30 802.875
66-31 796.000 67-31 803.000
66-32 796.125 67-32 803.125
66-33 796.250 67-33 803.250
66-34 796.375 67-34 803.375
66-35 796.500 67-35 803.500
66-36 796.625 67-36 803.625
66-37 796.750 67-37 803.750
66-38 796.875 67-38 803.875
66-39 797.000 67-39 804.000
66-40 797.125 67-40 804.125
66-41 797.250 67-41 804.250
66-42 797.375 67-42 804.375
66-43 797.500 67-43 804.500
66-44 797.625 67-44 804.625
66-45 797.750 67-45 804.750
66-46 797.875 67-46 804.875
66-47 798.000 67-47 805.000
66-48 798.125 67-48 805.125
66-49 798.250 67-49 805.250
Wireless Channel List
Channel Frequency(MHz) Channel Frequency(MHz)
66-01 792.250 67-01 799.250
66-02 792.375 67-02 799.375
66-03 792.500 67-03 799.500
66-04 792.625 67-04 799.625
66-05 792.750 67-05 799.750
66-06 792.875 67-06 799.875
66-07 793.000 67-07 800.000
66-08 793.125 67-08 800.125
66-09 793.250 67-09 800.250
66-10 793.375 67-10 800.375
66-11 793.500 67-11 800.500
66-12 793.625 67-12 800.625
66-13 793.750 67-13 800.750
66-14 793.875 67-14 800.875
66-15 794.000 67-15 801.000
66-16 794.125 67-16 801.125
66-17 794.250 67-17 801.250
66-18 794.375 67-18 801.375
66-19 794.500 67-19 801.500
66-20 794.625 67-20 801.625
66-21 794.750 67-21 801.750
66-22 794.875 67-22 801.875
66-23 795.000 67-23 802.000
66-24 795.125 67-24 802.125
66-25 795.250 67-25 802.250

6
3POWER/BATT indicator
4AF/PEAK indicator
5Input LEVEL control
6Channel select
switches 7RF power
output switch
1Microphone
connector
2POWER switch
Battery compartment
Microphone
release button
(under side of
the unit)
Parts Identification
1Microphone connector
Connect to a dynamic microphone which has a XLR type
connector.
2POWER switch
Turns the power of the transmitter ON or OFF.
3POWER/BATT indicator
When turning on the unit, the POWER/BATT indicator
lights in green. While in operation, the LED indicates the
battery condition.
See “Power Supply” on page 7.
4AF (audio frequency) /PEAK indicator
The AF/PEAK indicator lights in green when the supplied
audio frequency level is over the reference level. It lights in
red when the signal reaches the maximum level.
5Input LEVEL control
Controls the input attenuation level.
“–60” position provides 0 dB attenuation, and “–10”
position provides 50 dB attenuation.
6Channel select switches
Select the transmitting channel.
See “Channel Setting” on page 8.
7RF power output switch
In normal use, set the switch to “50”.
See “Use of RF power output switch” on page 10.

7
The transmitter can operate on two LR6 (size AA) alkaline
batteries continuously for about 4 hours at 25°C (77°F).
Installing the batteries
Power Supply
1Turn the battery-compartment screw counterclockwise.
2Match the polarities and insert the batteries.
3Close the lid.
Battery indication
When you turn the power on, the POWER/BATT indicator
lights in green.
While in operation, the POWER/BATT indicator shows the
battery condition as shown below.
Lights in green: Good
Lights in red: The battery level is low. About one hour
is left for continuous operation.
Flashing in red: The batteries are almost exhausted.
The unit does not work.
Promptly replace the batteries when the POWER/BATT
indicator lights in red or flashes.
When the POWER/BATT indicator lights in red on this unit,
the BATT indication on the tuner (WRR-802A/WRR-805A/
WRR-850A/WRU-806A.) starts flashing as a warning.
Note
The indication may be incorrect if the batteries are not new
when installed. If you plan to use the transmitter for a long
period, it is best to replace the batteries with new ones.
Two LR6 (size AA)
alkaline batteries

8
Power Supply Channel Setting
Caution
Turn off the transmitter when setting the transmitting
channel to eliminate interference or noise on other wireless
equipment.
Each “Wireless Channel” is represented on the unit by a 2-
digit TV channel number followed by another 2-digit
number, for example: 67-05.
Set the channel select switches for the clicked position of
the desired channel number by using a screw driver.
The left switch selects the TV band and the 10’s digit of the
transmitting channel. The right switch selects the 1’s digit of
the transmitting channel.
66
670
01
1
3
3
4
4
2
237
21
4
9
6
8
0
5
Set the left switch to “67” side “0”.
Set the right switch to “5” .
For the selectable wireless channels and frequencies, see
“Wireless Channel List” on page 5.
Notes on batteries
•Use new alkaline batteries, and check the recommended
“ useby” date on the bottom of the batteries.
•Do not pair different types of batteries.
•Always replace the two batteries together.
•The batteries are not rechargeable.
•Be careful to install the batteries with the correct polarity.
•When not using the transmitter for a long period, remove
the batteries to avoid leakage. If the batteries do leak, clean
all leakage from the unit. Leakage left in the unit may cause
poor battery contact. If there seems to be poor battery
contact, consult your Sony dealer.

9
To dettach a
microphone,
press the
microphone
release
button.
Microphone connection
If noise is heard
Depending on the environment where the system is
installed, outside noise or radio wave may disrupt the
transmission of certain channels.
To select a channel under this circumstance, turn off the
transmitter. Select a channel on the tuner, at which the RF
indicator is off. (A channel free from noise or radio wave
interference is selected.) Then, set the same channel on the
transmitter.
Sony microphones F-780/740/730/720/710, etc.
Attach a microphone
to the unit directly or
use a microphone
cable with XLR-3-11
and XLR-3-12 type
connectors.
Notes
•Be sure to set the arrow mark of the channel select switch
to the clicked position of the desired channel number. If
the switch does not click on the channel number, the
desired channel may not be set on the unit.
•If the channel select switches are operated while the
transmitter is on, the POWER/BATT indicator flashes in
green as a warning.
•If you set to any channel other than those listed in
“Wireless Channel List” on pag 5, the POWER/BATT
indicator flashes in green as a warning.
•While the POWER/BATT indicator is flashing, the RF
output signal send from the transmitter becomes lower
than the usable level.
While POWER/BATT indicator on the transmitter is
flashing, the RF input indicator on the tuner may light, if
the transmitter locates near the tuner.
Though the RF input indicator lights on the tuner, the
Sony tuner (equipped with muting function) makes neither
noise nor audio output.
•Make sure that the channel selected is the same as that
selected on the tuner used in the same system.
•If there is a TV broadcasting station near by, do not use
the station's channel.
Microphone System
Operation

10
Use of RF power output switch
The RF power output switch (located inside of the battery
compartment) selects the RF power output either 50 mW or
10 mW. In normal use, set the switch to “50” (factory preset
position).
50 mW output is suitable for optimum transmission over
long working distance.
10 mW output will be suitable for multi-channel operation
to eliminate the interference.
Use of input LEVEL control
When the AF/PEAK indicator lights in green continuously,
the supplied audio signal is continuously over the reference
level. If this occurs, use the input LEVEL control to avoid
sound distortion.
By turning the control to “–10”, the WRT-808A provides 50
dB input attenuation and can be inputted +4 dB (maximum
20 dB) line level signal.
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-802A/WRR-
805A/WRR-850A/WRU-806A, etc.
•Ensure that the transmitter 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, keep the transmitters at least
3m (10 feet) away from the tuner antennas when the
system is operated using a group which allows selection of
up to 11 channels.
•Do not grip the transmitter while using as it
will significantly degrade good
performance, causing dropouts, etc. Hold
the microphone itself as shown.
Microphone System Operation