Sony WRT-822A User manual

3-866-667-31 (1)
WRT-822A
UHF
SynthesizedTransmitter
Operating Instructions
1999 by Sony Corporation [AU66]

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Precautions
•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.
Table of Contents
Precautions ......................................................................... 3
Overview............................................................................. 4
Features .......................................................................... 4
System Configuration .................................................... 5
Wireless Channels Selectable ........................................... 6
Parts Identification ............................................................ 7
Power Supply ..................................................................... 9
Connections ...................................................................... 10
Notes on Microphone
System Operation....................................................... 10
Settings.............................................................................. 11
Initiating Setting Mode ................................................ 11
Changing the Transmitting Channel ............................ 11
Changing the Input Attenuation Setting ...................... 12
Resetting the Accumulated Time Indication ............... 13
Error Messages ................................................................ 14
Specifications.................................................................... 15

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Overview
Features
Phase Locked Loop (PLL) synthesized system
The WRT-822A has a refined phase locked loop (PLL)
synthesizer circuit.
Compact and lightweight
Innovative high-density mounting technology and
magnesium case have enabled the creation of this compact
and lightweight transmitter, which lets you move anywhere
for Electronic News Gathering (ENG) and Electronic Field
Production (EFP).
Remote battery alarm on tuner
This transmitter has capability of transmitting “Battery
status information” to Sony tuners which support the battery
status indication on both transmitter and tuner.
The information is sent to the tuners in approx. one hour
advance to battery exhaust so that they can safely replace
batteries of the transmitter.
Operation powered by easily available batteries
The built-in high efficiency DC-DC converter allows stable
operation, for about 8 hours continuously, with two LR6
(size AA) alkaline batteries.
LCD for coordinated operation control
The built-in CPU controls operation of the unit, including
the PLL circuit function. The LCD shows the current
The WRT-822A ensures excellent sound quality of the
microphone itself and provides 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.

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channel number/frequency, the residual battery power, input
attenuation setting, AF input level and RF output.
An accumulated operation time indication is also provided for
simple control of the time of battery use (in one-minute
increments).
Saved channel and input attenuation settings
The unit stores the channel and the input attenuation setting
when it is turned off. The saved settings are retained even if
the batteries are removed. Therefore, when using the unit
next time, you need not make the same settings again.
Highly reliable electronic attenuator
The built-in input level attenuator is adjustable in a range of
0 to 21 dB in 3-dB steps. It reduces signal distortion when
an excessively strong audio signal is inputted.
Compatibility with Sony lavalier microphone
The transmitter is compatible with Sony lavalier
microphones, including the ECM-77BC.
RF carrier with tone signal
The unit transmits the RF carrier accompanied by a tone
signal, enabling the tuner with a tone squelch circuit to take
out only the target audio signal received.
Wide dynamic range and low noise
The compander (compressor/expander) system enables
transmission over a wide dynamic range with minimum
noise
System Configuration
The WRT-822A can be used with the tuners listed below.
Sony 800 MHz band system models
a) For this models, the AN-820A UHF antenna and the WD-820A UHF
antenna divider are required.
Frequency band Model name
TV
channel
66
67
Frequency
(MHz)
792.250 - 798.500
799.250 - 805.500
Transmitter or
microphone
WRT-805A(66)
WRT-810A(66)
WRT-820A(66)
WRT-822A(66)
Tuner
WRR-805A(66)
WRR-810A(66)
WRR-840A(66)a)
WRR-860A(66)

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Wireless Channels Selectable
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10-66052.29772-66005.59710-76052.99772-76005.208
20-66573.29782-66526.59720-76573.99782-76526.208
30-66005.29792-66057.59730-76005.99792-76057.208
40-66526.297 03-66578.597 40-76526.997 03-76578.208
50-66057.29713-66000.69750-76057.99713-76000.308
60-66578.29723-66521.69760-76578.99723-76521.308
70-66000.39733-66052.69770-76000.00833-76052.308
80-66521.39743-66573.69780-76521.00843-76573.308
90-66052.39753-66005.69790-76052.00853-76005.308
01-66573.397 63-66526.697 01-76573.008 63-76526.308
11-66005.39773-66057.69711-76005.00873-76057.308
21-66526.39783-66578.69721-76526.00883-76578.308
31-66057.39793-66000.79731-76057.00893-76000.408
41-66578.397 04-66521.797 41-76578.008 04-76521.408
51-66000.49714-66052.79751-76000.10814-76052.408
61-66521.49724-66573.79761-76521.10824-76573.408
71-66052.49734-66005.79771-76052.10834-76005.408
81-66573.49744-66526.79781-76573.10844-76526.408
91-66005.49754-66057.79791-76005.10854-76057.408
02-66526.497 64-66578.797 02-76526.108 64-76578.408
12-66057.49774-66000.89712-76057.10874-76000.508
22-66578.49784-66521.89722-76578.10884-76521.508
32-66000.59794-66052.89732-76000.20894-76052.508
42-66521.597 05-66573.897 42-76521.208 05-76573.508
52-66052.59715-66005.89752-76052.20815-76005.508
62-66573.59762-76573.208

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BATT
–
+
SET
OFF
ON
AFRF
CH
4SET
button
5POWER
switch
Battery
holder
Wire antenna
3Audio
input
connector
2+/– buttons
1Display section
SET
Use a ballpoint pen or
similar instruments
to press +/– , SET
buttons.
Parts Identification
1Display section
ABC
D
AAF (audio input) indication
Lights when an audio signal over the reference level is being
supplied.
BRF (antenna output) indication
Lights when a signal is being transmitted from the antenna.
CBATT (battery) indication
Displays the status of the batteries.
See “Battery indication” on page 9.
DCH (channel) indication
Displays the transmission channel.
Each time you press the SET button in normal Transmit
mode, the channel indication changes to the frequency, input
attenuation and accumulated time indications as shown on
the next page.

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Parts Identification
In Attenuation indication mode, it displays the input
attenuation setting in dB, which can be changed in a range
of 0 to 21 dB in 3-dB steps.
In Accumulated time indication mode, it displays the
accumulated time of battery use (in one-minute increments).
For adjustments, see “Changing the Transmitting Channel”
on page 11, “Changing the Input Attenuation Setting” on page 12
or “Resetting the Accumulated Time Indication” on page 13.
2+ (+ selection) / – (– selection/reset) buttons
In setting mode, select the transmission channel, frequency
and attenuator level using either of these buttons, or reset the
time-of-use indication to “00:00” with the – button.
For Setting mode, see “Settings” on page 11.
Channel indication
Attenuation indication
Accumulated time
indication
Frequency indication
3Audio input connector
Connect the output connector of the following Sony lavalier
microphones: ECM-44BC, ECM-55BC, ECM-66BC,
ECM-77BC, ECM-166BC, ECM-310BC, ECM-350BC.
You can also use your wired microphone by connecting it to
this connector with an optional EC-1.5CF microphone cable.
See “Connections” on page 10.
4SET button
In normal Transmit mode, this button changes the indication
items of the display section as shown on the left column.
In Setting mode, this button selects the item to be set. To
initiate the setting mode, set the POWER switch to ON
while holding this button down.
For setting the transmit channel, input attenuation or
resetting the time-of-use indication in Setting mode, see
“Settings” on page 11.
5POWER switch
Turns the power of the transmitter ON or OFF.
When you set this switch to ON without holding any other
button, the transmitter is set to normal Transmit mode and
transmits the signal of the selected channel.
When you set this switch to ON while holding the SET
button down, Setting mode is initiated. No signal is
transmitted in Setting mode.
Note
Be sure to connect a microphone before turning the power
ON.

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Two LR6 (size AA)
alkaline batteries
The transmitter can operate on two LR6 (size AA) alkaline
batteries continuously for about 8 hours at 25°C (77°F). Battery indication
When you turn the power on, the battery status appears in
the BATT indication on the display section.
When the batteries reach stage 3shown in the table, the
battery indication on the tuner also starts flashing.
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.
Notes on batteries
•Use new alkaline 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 battery holder case and the unit.
Leakage left in the holder case and the unit may cause
poor battery contact. If there seems to be poor battery
contact, consult your Sony dealer.
Power Supply
Installing the batteries
1Slide the battery-holder catches inward (in the direction
of the arrows bb
bb
b B) to take out the battery holder.
2Match the polarities and insert the batteries.
3Set the battery holder in the original position.
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Microphone (not supplied)
Caution
When connecting a microphone to the unit, be sure to turn
the unit off.
To connect a microphone
The WRT-822A accepts the following Sony lavalier
microphones:
ECM-44BC ECM-55BC ECM-66BC
ECM-77BC ECM-166BC
ECM-310BC ECM-350BC
You can also use your wired microphone by connecting it to
this connector with an optional EC-1.5CF microphone cable.
To secure the microphone cable connection, be sure to turn
and lock the connector cover as illustrated below.
For the input attenuation adjustment, see page 12.
Connections
•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 tuner which is used
with the WRT-822A.
•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, keep the 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 11
channels, and at least 6 m (20 feet) away when using a
group which allows selection of 12 channels.
Notes on Microphone
System Operation