Sony WRT-810A User manual

Operating Instructions _ page3
_ Before using the unit, WRT-810A or WRT-820A,
please read this manual thoroughly and retain it for
future reference.
Manual de instrucciones pagina 23
Antes de utilizar las unidades WRT-810A o WRT-
- 820A, lea detenidamente este manual de
insirucciones, y consérvelo para futuras referencias.
Node d’emploi page 43
Lire attentivement ce mode d’emploi avant c’utiliser le
WRT-810A ou le WRT-820A, et le conserver pour
|, toute référence ultSrieure.
© 1991 by Sony Corporation

Owner’s Record
WRT-8104
The
model
number
is
located
at
the
grip
end
and
the
serial
number
inside the grip.
WRT-820A
The
model
and
serial
numbers
are
located
at
the
rear
of
the
unit.
Record
these
numbers
in
the
spaces
provided
below.
Refer
to
these
numbers
whenever
you
call
upon
your
Sony
dealer
regarding
this
product.
Model
No.
Serial
No.
i A
Notice for customers in the U.S.A.
Use of Sony wireless devices is reguiated by the Federal Communica-
tions 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.
Notice for customers in Canada:
Use of Sony wireless devices is regulated by the Department cf
Communications as described in their Telecommunications Regulatory
Circular TRC-78. A licence is normally required. The local district office
of DOC 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.

WHT OGUCHION sees cc cccs Secceecieceecc eles ce caecsecebceciceceds dssedevactvccedssesedstecucesateictsiess 3
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FRE CAUIIOINS -gccastiectne ca sepecesswecdestedevosic tendeauscouck oxavtivwtuate Maeoe tetev a geeestedene 6
PAmS IOGNUR CANON csi scthscitetescedceiissivewaiencakectccseedtncevbentamseadtidtacseccateics 7
INSONIMG Batteries oasis ccs. ccccaes sce nssvnnchgussnsacncessanisenscsvducdanFasteasacassivuctecnene 9
Changing the Channel Selection ...................cccsccsscscecssesesesseceeseeeeseeaees 10
Changing the Input Attenuation Setting 00... eeceeeceeeeeeeeneeees 12
Using the Microphone/Transmitter ................cccsccssscessceenssserecsneeteceeeees 15
SPOCIICAUONS sco. cietecsccsedeivceceesitued de dabcteee ato: seca diceiSecdees ayremeereeieest 16
Channels and Carrier Frequencies ..............scssecsccsssecescceseceeeteseeeseeenes 18
BIGCK DiRT sisi cox sotreeves thncsaesecsscnepstanietbinicastiae dein katdnatn eines 21
The WRT-810A and the WRT-820A are transmitters for an 800 MHz
band UHF synthesized wireless microphone system to be used for
broadcast or movie production purposes. The other system compo-
nents include the AN-820A UHF antenna, the WD-820A UHF antenna
divider, and the WRR-820A/840A UHF synthesized diversity tuner.
The microphones/transmitters and tuners are classified by frequency
band. See the table on the next page.
A 12 MHz frequency band (or two consecutive-numbered TV channels)
is assigned to each microphone/transmitter and tuner model. To
indicate the assigned frequency bands, the parenthesized numbers
following the mode! names in the table show the smaller of the assigned
TV channel numbers. in building up a UHF wireless microphone
system, be sure to combine a microphone/transmiiter and a tuner
having the same TV channel! number.

WAT-810A(64) WRR-820A(64)
WRT-820A(64) WRR-840A(64)
WRT-810A(66) WRR-820A(86)
AN-820A WD-820A
WRT-820A(66) WRR-840A(66)
WRT-810A(68) WRR-820A(68)
WRT-820A(68) WRR-840A(68)
A

Easy selection of 94 channels
With its sophisticated phase locked loop (PLL) circuit, the unit can
operate
on
any
one
of
94
carrier
frequencies
in
a
12
MHz
frequency
band
for
each
model,
selected
by
a
simple
button
operation.
Each channel is identified by a number consisting of a 2-digit TV
channel
number
and
a
2-digit
wireless
microphone
channel
number
(example: 68-23).
See
“Channels
and
Carrier
Frequencies”on
page
18
for
more
details.
Operation powered by widely available batteries
The
built-in
DC-DC
converter
allows
stable
operation,
for
up
to
eight
hours continuously, with just two L40 (LR6) alkaline batteries.
CPU and LCD for coordinated operation contro!
The built-in CPU controls the unit operation including the PLL circuit
function. The LCD shows the current channel number, the residual
battery
power,
the
input
attenuation
setting,
the
AF
input
level
and
the
RF output.
Saved channel and input attenuation settings
The unit stores the channel and the input attenuation settings 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
the
range
of
0
io
21
dB
in
3
dB
steps.
It
reduces
signal
distortion
when
an
excessively
strong
input
signal
is
received.
Handy audio input switch (WRT-810A)
You
can
use
the.
AF
switch
of
the
microphone
as
a
handy
audio
input
ON/OFF switch.
Compatibility with Sony lavalier microphones (WRT-820A)
The transmitter is compatible with Sony lavalier microphones, including
the ECM-166BC.
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.

e
0?
The
unit
is
designed
for
use
in
an
ambient
temperature
range
of
0°C
to
50°C
(32°F
to
122°F).
Do
not
place
the
unit
on
or
near
a
heat
source
such
as
lighting
equipment
or
a
power
amplifier,
or
in
a
place
subject
to
direct
sunlight
or
excessive
moisture.
In
such
places,
the
extemal
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
the
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.

Si a aS ha
WRT-810A WRT-820A
Cage --——__—-
Reduces noise caused
by the wind.
<Display section>
(See next page)
Wire anienna
-~———~~-Input connector
{ Connect the output connector of
i one of the following optional
Sony lavalier microchones:
AF switch
Switches
on
and
ECM-44SC/BC
off
the
audio
ECN-55SC/BC
input.
ECM-68SC/BC
ECN-77SC/8C
ECM-166BC
RF power output select
switch
Selects RF power output
2.5 mW or 10 mW.
2.5 mW: Suitable for a
working range of up to
30 m (98 feet).
You can also us¢ your wired microphone
by connecting it to this connector
with an optional EC-1.5CF microphone
cable.
Pin assignment
1 1 45 V ouiput
PNET ee ah A Om ene emt Oe cee
10 mW: Suitable for a
working
range
exceeding
bene
2
HOT
30
m
(98
jeet).
3
COLD
3
2
4
GND
Battery
holder
= a
2
a
s 5
i
bee paat pret aaiiaramaiacs.
POWER switch
Setting this switch to ON puts the unit in transmission mode,
recalling the channel! selection and the input attenuation setting.
Setting this switch to OFF tums off the unit, saving the
channel selection and the input attenuation setting.

Display section
AF indicator
The indicator appears when the input i
audio signal level is higher than needed
_ to obtain the reference deviation.
—<—<—<—<—_~S
rrr
RF
indicator
The
indicator
appears
when
the
RF
carrier
is being transmitted.
—
Wot er ani oH rong,
—————————-—— CH indicator
3 indicates the current wireless microhpne
channel selection in channel display or
channel set mode. When the unit is in
attenuation display/set mode, this
TVIATT
indicator
-
indicator
shows
“~
~”.*
indicates
the
current
TV
channel
selection
in
channel
display
or
channel
set
mode,
or
the
current
input
attenuation
setting
in
decibels
in
attenuation
dispiay/set
mode.
{
\BATT indicator
(a): The batteries are in good condition.
[al The residual battery power is below
the 50% level.
: The batteries are exhausted.
Replace them.
MOA men a ae seen he:
Aan a a
ere RA
|
+/—
buttons
—
see
a
ey
(When
this
indicator
appears,
Use
these
buttons
to
increment
or
the
whole
display
starts
flashing.)
decrement
the
channel
selection
in
channel
set
mode
or
the
input
attenuation
SET
button
setting
in
attenuation
display/set
mode.
Use
this
button
to
enter
channel
set
or
attenuation display/set mode.
+/-ISET buttons
+-— set
. rN
Use a ball-point pen or similar instrument
to
press
these
buttons.
:
i
ah
sais
*
The
example
shows
TV
channel!
display
on
the
WRT-810A(68)
or
'
WRT-820A(68).

| WRT-810A
Two L40 (LR6)
alkaline batteries
Two L40 (LR6)
alkaline batteries
Notes.
¢ Be sure to turn the POWER switch off before replacing the batteries.
When the unit is turned on with batteries which are exhausied, the
BATT indicator displayed may reflect their temporarily recovered
power which will reduce very quickly. Before starting extended
operation, replace the batteries in the unit even if the BATT indicator
shows [s] or (al :
Notes on batteries
oo e@ e @®
Be sure to insert the batteries with the correct polarity.
Do not pair different types of battery.
Always replace the two batteries together.
The batteries are not rechargeable.
When keeping the unit out of use for extended periods of time,
remove the batteries to avoid leakage.
Should the batteries be found to have leaked in the unit, replace them
with new ones after carefully wiping the leakage from the battery
holder or case.

1 While pressing the SET button, set the POWER switch to ON
to enter channel set mode.
The current channel selection will appear on the display.
AF RF B8ATT
af
SS a
TV/ATT CH
WRT-810A
ro
WRT-820A +
POWER AF
The example shows TV channel display on the WRT-810A(68)
or WRT-820A(68).
10
2 Press the + button to increment the curreni channel selection
or the — button to decrement it.
if you keep either button pressed, the channel! selection will be
incremented or decremented successively.
The setting will cycle the channel number from 68-01 through
The example shows TV channel display on the WRT-810A(68)
or WAT-820A(68).

3 Set the POWER switch to OFF to save the selected channel
number along with the current input attenuation setting.
AF RF BATT |
TV/ATT CH :
The unit cannot transmit in channel! set mode.
Make sure that the channel selected is the same as that selecied on
the WRR-820A/840A unit used in the same System.
Depending on the noise or interference conditions, the selectable
channels may not necessarily all be usable. If necessary, you can
determine the usable channels by stepping the channel selection
through a number of channels on the tuner with the microphone/
transmitter set to OFF. Those channels on which the RF indicator of
the tuner does noi light are usable.
If there is a TV broadcasting station nearby, to avoid possible
interference with broadcasing, do not use that station’s channel. _
The unit may not operate correctly if it is turned on again immediately
after turning off the power while in channel set mode. Pause for a few
seconds or more before turning on the power again.
14

You
can
change
the
input
attenuation
setting
in
3-dB
steps
in
the
range
Raise
the
setting
to
decrease
the
sound
volume
or
lower
it
to
increase
of
0
to
21
GB.
the
sound
volume,
using
the
following
procedure:
1
When
the
current
channel
selection
is
displayed
(that
is,
when
¢
Switching
from
channel!
set
mode
to
attenuation
display/set
the
unit
is
in
either
channel
set
mode
or
channel
display
mode
mode),
press the SET
button
to
enter
attenuation
dispiay/set
mode.
(Channe!
set
mode)
{Attenuation
display/set
mode)
‘aie 7 4 —_—- =
64
Ly
ot
eas
AF RF BATT TV/ATT CH : TV/ATT CH
TV/ATT CH
¢ Switching frorn channel display mode to attenuation display/
set mode
(Channel display mode) (Attenuation display/set mode)
The
current
input
attenuation
seiting
in
decibels
will
appear
on
es
ine
depiey:
TV/ATT
CH
TV/ATT
CH
The exampie shows TV channel display on the WRT-810A(68)
or WRT-820A(68).
12

3
Press
the
SET
button
to
return
to
the
previous
mode.
AF RF
{fen =
2 7- Bl
TV/ATT CH
BATT
AF
RF
BATT
kare ‘fg
TV/ATT CH
To save the input attenuation setting along with the
if
you
keep
either
button
pressed,
the
input
attenuation
setting
channel
number
selected
in
the
preceding
channel
set
will be incremented or decremented successively until it mode:
reaches
0
or
21
dB.
Set
the
POWER
switch
to
OFF.
AF RF BATT
TV/ATT CH
WR7T-820A g ON
=
The example shows TV channel display on the WRT-810A(68)
or WRT-820A(68).
13

¥Notes.
°
After
entering
attenuation
display/set
mode
by
pressing
the
SET
button
in
channel
set
mode,
if
you
do
not
press
any
button
for
about
five
seconds,
the
unit
will
return
to
channel
set
mode
automatically.
¢
The
attenuation
display/set
mode
entered
by
pressing
the
SET
button
in channel
display
mode
will
stay
until
you
press
the
SET
button
again.
lf
you
turn
off
the
unit
without
returning
to
channel
display
mode,
the
unit
saves
the
status,
so
that
it
will
enter
attenuation
display/set
mode
when
tumed
on
next
time.
©
Even
if
you
keep
on
pressing
the
+
or
—
button,
the
input
attenuation
setting
does
not
cycle.
After
being
decremented
to
0
dB
or
incremented to 21 dB, the setting stays unchanged unless you
change it in the reverse direction.
14

Select the channel to be used.
(Use the procedure in “Changing the Channel Selection” on
pages 10 and 11.)
2 Connect the lavalier microphone. (For WRT-820A only)
Microphone
(not supplied) ee
ao
i)
Jie
3 Set the POWER switch to ON.
|
=|
f
ie
\
foams
:
!
}
§
H
}
i
:
i
t
:
Le
oF an WRT-820A
tO . -(—)
UL
4 Set the AF switch to ON. (For WRT-810A only)
WRT-810A
oo
To prevent noise generation, 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 11 channels,
and at least 6 m (20 feet) away when using a group which allows
selection of 12 to 19 channels.
Ensure that the tuners set to channels not being used are either
turned off or set to the minimum output level (the LEVEL adusiment
knob set to MIN).
Turing the microphoneAransmitter on or off may generate some
noise. To minimize the impact of such noise, set the LEVEL
adjustment knob of the tuner being used to MIN beforehand.
Switching the unit on without checking the channel selection first may
interfere with the operation of other microphones/transmitiers, if the
current setting is already being used.
The WRT-820A unit may be put in the soft case upside down so that
its wire antenna points downward.
45

Transmiiter and Modulaior Section
Oscillator
Carrier frequencies
Tone signal
Type of emission
RF power output
Frequency stability
Spurious radiation
Type of antenna
Pre-emphasis
Reference deviation
Maximum deviation
Crystal controlled PLL synthesizer
94 settings at 125-kHz intervais
WRT-810A/820A (64): 770.125 to 781.875 MHz
WRT-810A/820A (66): 782.125 to 793.875 MHz
WRT-810A/820A (68): 794.125 to 805.875 MHz
32.768 kHz
110KF3E
WRT-810A: 10 mW/2.5 mW, selectable
(50 ohms)
WRT-820A: 10 mW (50 ohms)
Within +0.005%
Less than 2.5 pW
1/4 wavelength wire
50 ps
+5 kHz
+40 kHz
Maximum modulation frequency
Frequency response
Signal-to-noise ratio
Audio distortion
Audio attenuator
16
15 kHz
WRT-810A: 100 Hz to 13 KHz
WRT-820A: 100 Hz to 15 kHz
More than 60 dB (A-weighted, with reference
deviation at WRR-820A/840A)
WRT-810A: Less than 1.5% (with reference
deviation)
WRT-820A: Less than 1.0% (with reference
deviation)
0 to 27 GB, variable in 3-dB steps
Maximum input sound pressure level (for WRT-810A at 21-dB attenuation)
151 dB SPL
Maximum input level (for WRT-820A at 21-dB attenuation)
—3 dB (0 dB = 1 Vrms)
Microphone unit (WRT-810A)
Uni-directional dynamic type
Power Section
Power requirements 3 VDC (twoL40 (LR6) alkaline batteries)
Battery life About & hours at 25°C or 77°F (with Sony AM3
(LR6) alkaline batteries )
Current consumption Less than 170 mA (at 3 V)

General
Operating temperature
Storage temperature
Dimensions
Weight
Accessories supplied
0°C to 50°C (32°F to 122°F)
~30°C to +60°C (—22°F to +140°F)
WRT-810A: 48 x 238 mm (maximum dia./
length)
(1 5/16 x 9 3/e inches)
WRT-820A: 63 x 103 x 17 mm (w/hd)
(2 1/2 x 4 1/8 x 11/46 inches)
WRT-810A: About 300 g {including batteries)
(10.5 02)
WRT-820A: About 165 g (including batteries)
(5.8 02)
WRT-810A:
Microphone holder (1)
Stand adaptor PF 1/2 to NS 5/s (1)
WRT-820A:
Soft case (1)
Optional
accessories
(for
use
with
WRT-820A)
Lavalier microphones
ECM-44SC/BC
ECN-55SC/BC
ECM-66SC/BC
ECN-77SC/3C
ECM-166BC
Microphone cable
EC-1.5CF
Design
and
specifications
are
subject
to
change
without
notice.
17

776.125
776.250
776.375
776.500
776.625
776.750
- 776.875
777.000
777.125
777.250
777.375
777.500
777.625
777.750
777.875
778.000
778.125
778.250
778.375
778.500
778.625
778.750
778.875
779.000
749.125
779.250
779.375
779.500
779.625
779.750
779.875
780.000
780.125
780.250
780.375
780.500
780.625
780.750
780.875
781.000
787.125
781.250
781.375
781.500
787.625
781.750
781.875

WRT-810A/820A (66)
782.125
782.250
782.375
782.500
782.625
782.750
782.875
783.000
783.125
783.250
783.375
783.500
783.625
783.750
783.875
784.000
784.125
784.250
784.375
784.500
184.625
784.750
784.875
785.000
785.125
785.250
785.375
785.500
785.625
785.750
785.875
788.606
786.125
786.250
786.375
786.500
786.625
786.750
786.875
787.000
787.125
787.250
787.375
787.500
787.625
787.750
787.875
788.125
788.250
788.375
738.500
788.625
788.750
788.875
789.000
789.125
789.250
789.375
789.500
789.625
789.750
789.875
790.600
790.125
790.250
790.375
790.500
780.625
790.750
790.875
791.000
791.125
791.250
791.375
791.500
791.625
791.759
791.875
792.000
792.125
792.250
792.375
792.500
792.625
792.750
792.875
793.000
793.125
793.250
793.375
793.500
793.625
793.750
793.875

Channels and Carrier Frequencies:
WRT-810A/820A (68)
794.125
794.250
794.375
794.500
794.625
794.750
794.875
795.000
795.125
795.250
795.375
795.500
795.625
795.750
795.875
796.000
796.125
798.250
796.375
796.500
796.625
796.750
796.875
797.060
797.125
797.250
797.375
797.500
797.625
797.750
797.875
798.000
798.125
798.250
798.375
798.500
798.625
798.750
798.875
799.000
799.125
799.250
799.375
799.500
799.625
799.750
799.875
800.125
800.250
800.375
800.500
800.625
800.750
- 800.875
801.000
801.125
801.250
801.375
801.500
801.625
801.750
801.875
802.000
802.125
802.250
802.375
802.500
802.625
802.750
802.875
803.000
803.125
803.250
803.375
803.500
803.625
803.750
803.875
804.000
804.125
804.250
804.375
804.500
804.625
804.750
804.875
805.000
805.125
805.250
805.375
805.500
805.625
805.750
805.875