Sony WRT8P Users Manual

DRAFT

UHF Synthesized Transmitter

Operating Instructions

Before operating the unit, please read this manual thoroughly and
retain it for future reference.

WRT-8P

©2006 Sony Corporation

Owner’s Record

The model number plate is located on the side and the serial number is located inside
the battery compartment. Record the model and serial numbers in the space provided
below. Refer to these numbers whenever you call upon your Sony dealer regarding
this product.

Model No. WRT-8P 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.

This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with
minimum distance 20cm between the radiator and body (excluding extremities:
hands, wrists and feet).

FCC Radiation Exposure Statement:

The available scientific evidence does not show that any health problems are
associated with using low power wireless devices. There is no proof, however, that
these low power wireless devices are absolutely safe. Low power Wireless devices
emit low levels of radio frequency energy (RF) in the microwave range while being
used. Whereas high levels of RF can produce health effects (by heating tissue),
exposure to low level RF that does not produce heating effects causes no known
adverse health effects. Many studies of low level RF exposures have not found any
biological effects. Some studies have suggested that some biological effects might
occur, but such findings have not been confirmed by additional research. The WRT­8P has been tested and found to comply with the Federal Communications
Commission (FCC) guidelines on radio frequency energy (RF) exposures.

2

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 license 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 license is issued on no­interference, 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.

IC Exposure of Humans to RF Fields

The installer of this radio equipment must ensure that the antenna is located or
pointed such that it does not emit RF field in excess of Health Canada limits for the
general population; consult Safety Code 6, obtainable from Health Canada’s website
www.hc-sc.gc.ca/rpb”

3

Table of Contents

• Overview (Features) ---- 5

• Precautions ---- 5

• Parts Identifications ---- 6

• Power Supply ---- 9

• Settings ---- 10

Initialing setting mode
Setting the transmission channel
Setting the attenuation level of the audio input
Setting the RF output power
Setting the +48V power supply

• Attachment and installation procedures ---- 13

• Notes on microphone system operations ---- 14

• System Configurations ---- 15

• Error Messages ---- 16

• Specifications ---- 17

4

Overview

Precautions

The WRT-8P is a plug-on 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 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 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.

• Lengthy use of the unit in such
places or not cleaning it after its
use in such places may shorten
its life.

The features of the WRT-8P are:

•Converts a wired microphone to a
wireless microphone via an XLR-type
connector.

•Compact and lightweight metal body
provides high durability and good
balanced handling.

•250 mW high RF output power for
stable long-distance transmission.

•Selectable RF output power: 250
mW/50 mW.

•+48 V power supply capability.

•Switchable input level: MIC/LINE

•Attenuator function allows adjustment
of the audio-input level.

•A backlit LCD provides extensive
information.

•Optimized balance when combined
with the F-112 dynamic microphone.

• 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.

5

Parts Identification

Audio input connector

2

AF/PEAK indicator

8

(Audio input LEVEL)

+48V indicator

9

Display section

1

3

H

SET button

4

- , + buttons

POWER switch

5

AF LEVEL control

6
7

MIC / LINE selector

10

Battery lid

6

Parts identification

1

Display section

A AF (audio input) indication

Appears whenever an audio signal
stronger than the reference level is
received.

B RF (antenna output) indication

Appears during signal transmission
from the antenna.

C RF power indication

Shows the RF output power setting.

See “Changing the RF Output Power.”

D BATT (battery) indication

Shows the battery condition.

See “Battery indication” in “Power
Supply” section.

2

Audio input connector

Connect the following Sony’s
microphones: F112, ECM-678, ECM­674 or a line output cable from Sony’s
portable mixer DMX-P01.

Caution

When connecting a microphone or a
cable to the unit, be sure to turn the
unit off.

3

SET button

In Transmitting mode, press this
button to change the indicated items in
the lower half of the LCD display.

The SET button is also used to enter
the Setting mode and select the item to
be set.

4

+ / – buttons

In setting mode, select the
transmission channel, frequency and
RF output power setting using either of
these buttons, or set/reset the +48V
power supply.

5

POWER switch

E CH (channel) indication

Shows transmitting channel.
Each time you press the SET button in

Transmitting mode, the channel
indication changes as follows.

Turns the transmitter ON or OFF.

Note

Be sure to connect a microphone or a
cable before turning the power ON.

AF LEVEL control

6

Adjusts the audio level from the audio
input connector.

7

Parts identification

6

AF LEVEL control

Adjusts the audio input level from the
audio input connector .

7

MIC/LINE select switch

Set this switch to MIC when a
microphone is connected to the audio
input connector; set it to LINE when
an audio mixer, etc. is connected to the
audio input connector.

For details, on the use of this switch,
see “Adjusting the Audio Input Level.”

Note

Before changing to the MIC position
from LINE position, be sure to turn the
unit off to avoid a noise when the
+48V power supply is turned on, or
adding high output level audio signal.

8

AF/PEAK indicator

The green or red color indicates the
strength of the audio input signal level.

9

+48V indicator

The indicator shows the +48V power
supply is enable when MIC/LINE
switch is in MIC position.

10

Battery lid

Slide the battery lid to release the lock
and open the battery compartment.

8

Power Supply

WRT-8P can be powered by one 6LR61 (9V) alkaline battery for about five hours of
continuous operation (at 25°C, 77° F) .

The battery condition Indication are given below:

Battery indication

When you turn the power on, the battery condition is shown by the BATT indication
in the display section.

When the indication in column 4 starts to flash, replace the batteries with new one.
Be sure to check the expiration date printed on the new battery before using it.

NOTE

The indicated battery condition may not be correct if the battery was not new when
installed. If you plan to use the component for a long period, it is recommended that
you replace the battery with brand new one.

Notes on battery

Battery may leak or explode if mistreated. Be sure to follow these instructions.

• Be sure to install the battery with the correct polarity.

• The battery are not rechargeable.

• When not using the component for a long period of time, remove the battery to
avoid leakage. If the battery dose leak, clean all leakage from the battery
compartment and the component. Leakage left in the compartment and the component
may cause poor battery contact. If there seems to be poor battery contact, consult your
Sony dealer.

Inserting the battery

1 Slide the battery lid to release the lock
and open the battery compartment.

2 Align one new 6LR61 (9V) alkaline
battery with the polarity markings and
insert them into the battery compartment,
and then close the cover.

9

Settings

NOTE

• The transmitter cannot transmit in
Setting mode.

• Make sure that the channel selected
on the transmitter is the same as
that selected on the tuner being
used in the same system.

• Depending on the noise or
interference conditions, all
selectable channels may not be
usable. If necessary, you can
determine which channels are
usable by cycling the channel
selection through a number of
channels on the tuner with the unit
set to OFF. Those channels for
which the RF indicator on the tuner
does not light are usable.

Initiating Setting Mode

In Setting mode, you can change the
transmission channel/frequency and
the RF output power level, or +48V
power supply.

To Enter Setting Mode

While holding down the SET button,
set the POWER switch to ON.

The transmitter enters Setting mode
and the indication before the
transmitter was previously turned
OFF flashes on the display section.

Each time you press the SET button,
the setting items are cyclically
switched as shown below.

• If there is a TV broadcasting station
near by, do not use the station’s
channel.

• The transmitter may not operate
correctly if it is turned on
immediately after being turned off
in Setting mode. Wait for a few
seconds before turning the power
on again.

• The channel numbers and
frequencies of your transmitter are
shown on the “Sony Wireless

Microphone System Frequency
List” supplied with the manual.

MIC or LINE

10

Settings

Changing the Transmitting
Channel

The transmitting channel can be
selected through either the channel
number or the frequency.

1 Set the transmitter to Setting mode.

2 If the channel number (or frequency)

indication does not appear, press the
SET button until the channel number (or
frequency) indication appears.

3 Press the + or – button to select the
channel number (or frequency).

Pressing the + button cycles the
indication in the order shown in the
tables in the “Sony Wireless

Microphone System Frequency List”

supplied with the manual. Pressing the –
button cycles the indications in the
opposite direction.

Hold down the button to change the
channel number (or frequency) quickly.

Changing the RF Output
Power

You can select the RF output power from
the levels of H (250mW) and L (50 mW)
in Setting mode.

1 Set the transmitter to Setting mode.

2 Press the SET button until the RF

output power indication appears on the
display.

3 Press the + or – button to select the
setting: H (250mW) or L (50 mW).

4 Set the POWER switch to OFF to
release Setting mode. Or, press the SET
button to continue operations in Setting
mode.

The next time you turn on the transmitter
by setting the POWER switch to ON, the
transmitter enters Transmit mode with
the selected RF output power.

11

Settings

Adjusting the Audio Input
Level

You can change the audio input level in
a range of -60 dBV to –40 dBV (when
the MIC/LINE selector is at MIC
position) or –20 dBV to 0 dBV (when
the MIC/LINE selector is at LINE
position).

1 Set the MIC/LINE select switch
according to the equipment connected
to the audio input connector.

When a microphone is connected to this
unit, set the selector to MIC position;
when a mixer, etc., is connected, set it
to LINE position.

Setting the +48V power
supply

You can set the +48V power supply for
the electric condenser microphone in
Setting mode.

1 Set the transmitter to Setting mode.

2 Press the SET button until the “MIC”

or “MIC+48” indication appears on the
display.

2 Turn the AF LEVEL control so that
the AF/PEAK indicator does not light in
RED color continuously.

Occasional lighting of the AF/PEAK
indicator in RED is acceptable.

3 Press the + button to select the setting
“MIC+48”, or press the – button to select
the setting “MIC”

“MIC+48” shows the +48V power is set,
and it is supplied when MIC/LINE
switch is set to MIC position in Transmit
mode.

4 Set the POWER switch to OFF to
release Setting mode. Or, press the SET
button to continue operations in Setting
mode.

The next time you turn on the transmitter
by setting the POWER switch to ON, the
transmitter enters Transmit mode with
the selected power supply setting.

12

Attachment and Installation Procedures

Attaching a microphone or
a cable

1 Turn the connector ring left.

2 Insert to the connector of a microphone

or a cable plug until the end.
3 Turn the connector ring right to fix the
latch against a microphone or a cable.

Inserting into the supplied
soft case

Insert the WRT-8P into the supplied
soft case with the rear side up, and
close the flap.

Attaching a microphone or
a cable

Turn the connector ring left to lose the
latch.

13

Notes on microphone system operations

• 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 WRR­802/805/855/862, 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 (50 mW)
when multiple channels are used
simultaneously, and keep the
microphones and transmitters at
least 6 m (20 feet) away from the
antennas when the system is
operated using a group which
allows selection of up to 8 channels,
and at least 12 m (40 feet) away
when using a group which allows
selection of 9 channels.

• When there is a strong interference
signal around the microphone
system, such as an interference
caused by an active handy phone,
noise may occur on the microphone
system.

• Before to be attached or removed
the microphone or cable, turn down
the volume of the equipment
connected to the tuner. Otherwise,
noise will be produced.

14

System Configurations

Example of typical system

Microphone

F-112

Portable mixer

DMX-P01

Microphone

ECM-678
ECM-674

Plug-on transmitter

WER-8P

Portable tuner

WRR-855B
WRR-861B
WRR-862B

Portable tuner

WRR-861B
WRR-862B

Portable mixer

DMX-P01

Camcorder

PDW-530/530P/510/510P

15

When a problem occurs, one of the following error message may appear on the display.

16

Specifications

Transmitter and modulator section

Oscillator Crystal controlled PLL synthesizer
Carrier frequencies 758.125-781.875MHz (U6264 model)

782.125-805.875MHz (U6668 model)
Operating frequency band 24 MHz
RF power output 250 mW/50 mW
Tone signal 32.768 kHz
Battery condition signal 32.782 kHz
Pre-emphasis 50 µs
Deviation +/- 10 kHz (–60 dBV, 1 kHz input, MIC)

+/- 10 kHz (-18 dBu, 1 kHz input, LINE)
Maximum deviation +/- 40 kHz
Audio input attenuation 0 to 20 dB (MIC, LINE)
Audio input pad 40dB(LINE)
Frequency response 50 to 18,000 Hz
Signal-to-noise ratio 60 dB or more (A-weighted, modulation frequency 1 kHz,

with +/- 10 kHz deviation at tuner)

Power section

Power requirements 9.0 V DC (one 6LR61, alkaline battery)
Battery life Approx. 2.5 hours at 25°C(77° F )

with Sony 6LR61 alkaline battery (250 mW)

Approx. 4 hours at 25°C(77° F )

with Sony 6LR61 alkaline battery (50 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 44 x 106 x 44 mm (w/h/d)
Mass Approx. 230 g (including battery)

Supplied accessories

Operating Instructions (1)

Sony Wireless Microphone System Frequency List (1)

Soft case (1)

Design and specifications are subject to change without notice.

0 dBV = 1 Vrms

17

Specifications

Dimensions

H

106

SONY R Model. WRT-8P

UHF SYNTHESIZED TRANSMITTER5

Name plate

44

44

Design and specifications are subject to change without notice.

Unit: mm

18

Printed in Japan

19