Sony WRT-822A User manual

US
FR
ES
3-866-667-11 (1)
WRT-822A
UHF
SynthesizedTransmitter
Operating Instructions
Mode d'emploi
Manual de instrucciones
Wireless Channel Lists/ Listes des canaux sans fil /
Listas de canales inalámbricos
1999 by Sony Corporation [U64] [U66] [U68]

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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.
Avis pour les clients au Canada:
L'usage des appareils sans-fil Sony est réglé par l'Industrie
Canada comme décrit dans leur Cahier des Normes
Radioélectriques CNR-123. Une licence est normalement
requise. Le bureau de l'Industrie Canada doit être contracté.
Lorsque l'opération de l'appareil est dans les limites de la
bande de radiodiffusion, la licence est émanée sur la base
de non-interférence, non-protection avec les signaux de
radiodiffusion.
L’utilisation de cet appareil est soumise aux deux conditions
suivantes : (1) cet appareil ne peut causer d’interférences, et
(2) cet appareil doit accepter toutes les interférences, y
compris les interférences capables de provoquer un
fonctionnement indésirable de l’appareil.
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-822A 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 licence.
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
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.

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English 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
Transmitting Channel Band ........................................... 4
Features .......................................................................... 5
System Configuration .................................................... 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
Wireless Channel Lists.................................................. L-1
English
US

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Overview
U66 model
A 782-794MHz frequency band is assigned to the WRT-
822A/66 model, permitting it to operate on any of 94 carrier
frequencies in 125-kHz steps of Sony original channel plan
in the range of TV channels 66 and 67.
For the selectable channels, see wireless channel list on page
L-2.
U64 model
A 770-782 MHz frequency band is assigned to the WRT-
822A/64 model, permitting it to operate on any of 94 carrier
frequencies in 125-kHz steps of Sony original channel plan
in the range of TV channels 64 and 65.
For the selectable channels, see wireless channel list on page
L-3.
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.
Transmitting Channel Band
The transmitter and tuner of the wireless microphone system
are classified by frequency band.
A 12-MHz frequency band (or two consecutive-numbered
TV channels, such as 68 and 69 of the WRT-822A/68
model) is assigned to each transmitter and tuner model.
In building a UHF wireless microphone system, be sure to
combine a transmitter and a tuner having the same TV
channel number.
U68 model
A 794-806 MHz frequency band is assigned to the WRT-
822A/68 model, permitting it to operate on any of 94 carrier
frequencies in 125-kHz steps of Sony original channel plan
in the range of TV channels 68 and 69.
For the selectable channels, see wireless channel list on page
L-1.

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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
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

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Overview
System Configuration
The WRT-822A can be used with the tuners listed below.
Transmitter or microphone
WRT- Frequency band
822A TV channel Frequency (MHz)
U64 64 770.125 - 775.875
65 776.125 - 781.875
U66 66 782.125 - 787.875
67 788.125 - 793.875
U68 68 794.125 - 799.875
69 800.125 - 805.875
Model name
a) These models cover only 68 and 69 channels.
b) For these models, the AN-820A UHF antenna and the WD-820A UHF antenna divider are required.
Tuner
WRR-800A
WRR-801A
WRR-802A
WRR-805A
WRR-810A
WRR-820Ab)
WRR-840Ab)
WRR-850Ab)
WRR-855A
WRR-860Aa)
MB-806A
WRT-805A
WRT-807A
WRT-808A
WRT-810A
WRT-820A
WRT-822A
WRT-830Aa)
WRT-860A
WRT-867Aa)
Sony 800 MHz band system models

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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
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.
Display example for U68 model
AB C
D

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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 Display example for U68 model
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

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Initiating Setting Mode
In Setting mode, you can change the transmission channel/
frequency and the attenuation level, or reset the accumulated
time indication.
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.
Changing the Transmitting Channel
1Confirm that the channel number flashes on the display.
If not, set the unit in Setting mode, and press the SET
button so that the channel number flashes.
If you want to change the channel in frequency
indication, press the SET button one more.
2Press the + or – button to select the channel.
Pressing the + button cyclically changes the channel
indication in the order shown on pages L-1 to L-3.
Pressing the – button changes it in reversed order.
If you keep either button pressed, the channel number
will be incremented or decremented successively.
Settings
Display example for U68 model
Channel selection
Attenuator adjustmentAccumulated time
indication reset
Frequency selection
Display example for U68 model
In channel selection mode
In frequency selection
mode
Display example for U68 model

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Attenuation level indication
3Once the desired channel number appears, 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 power only by setting the
POWER switch to ON, the transmitter will be set to
Transmit mode with the selected channel.
Notes
•The unit cannot transmit in Setting mode.
•Make sure that the channel selected is the same as that
selected on the tuner 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 not light are usable.
•If there is a TV broadcasting station near by, do not use
the station's channel.
•The unit may not operate correctly if it is turned on again
immediately after turning off the power while in setting
mode. Pause for a few seconds or more before turning on
the power again.
•When operating two or more UHF wireless microphone
Settings
systems using channels in different groups, ensure that the
systems are at least 100 m (330 feet) apart from each
other. (The same applies also when using channels in a
group if the different UHF wireless microphone systems
are installed where they are within sight of each other.)
Changing the Input Attenuation Setting
You can change the input attenuation setting in 3-dB steps
in a range of 0 to 21 dB. You can change it either in Setting
mode or in Transmit mode.
Changing in Setting mode
1Set the unit in Setting mode.
2Press the SET button until the attenuation level indication
appears on the display.
3Press the + or – button to select the attenuation level.
If you keep either button pressed, the level will be
incremented or decremented successively.

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Resetting the Accumulated Time Indication
The time indication accumulates time in hours and minutes
when the WRT-822A is on.
Reset the indication to “00:00” whenever you replace the
batteries so that it can display the running time of the
batteries.
1Set the unit in Setting mode.
2Press the SET button until the accumulated time
indication appears on the display.
3Press the – button.
The time indication resets to “00:00.”
While you see “00:00” indication, you can go back to
previous value by pressing the + button.
4Set the POWER switch to OFF to release Setting mode.
4Once the desired level appears, 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 power only by setting the
POWER switch to ON, the transmitter will be set to
Transmit mode with the selected attenuation setting.
Changing in Transmit mode
You can also change the input attenuation level during
transmission.
1If the attenuation level is not displayed, press the SET
button until the attenuation level indication appears on
the display.
2Press the + or – button to select the level.
Accumulated time indication

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Error Messages
When a problem occurs, one of the following error
messages may appear on the display.

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Transmitter and modulator section
Oscillator Crystal controlled PLL synthesizer
Type of emission F3E
Carrier frequencies
U64 model: 770.125 to 781.875 MHz
U66 model: 782.125 to 793.875 MHz
U68 model: 794.125 to 805.875 MHz
RF power output 10 mW
Frequency stability Within ±0.005%
Tone signal 32.768 kHz
Type of antenna 1/4-wavelength wire
Pre-emphasis 50 µs
Deviation ±5 kHz (–60 dBV1), 1 kHz input
with 0 dB audio attenuation)
Frequency response 70 to 13,000 Hz
Signal-to-noise ratio 60 dB or more
(A-weighted, with reference
deviation at WRR-800A/801A/
805A/ 810A/820A/840A/850A/
855A/860A)
Audio attenuator 0 to 21 dB, variable in 3-dB steps
Power section
Power requirements 3.0 V DC
(two LR6/size AA alkaline
batteries)
Battery life Approx. 8 hours at 25°C (77°F)
with Sony LR6 alkaline batteries
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 ×103 ×17 mm (w/h/d)
(21/2×41/8×11/16 inches)
Mass Approx. 145 g (5.1 oz) including
batteries
Supplied accessories
Operating Instructions (1)
Soft case (1)
Optional accessories
Lavalier microphones
ECM-44BC, ECM-55BC, ECM-66BC, ECM-77BC,
ECM-166BC, ECM-310BC, ECM-350BC
Microphone cable
EC-1.5CF
Design and specifications are subject to change without
notice.
Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1) 0 dBV = 1 Vrms

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Précautions
• Cet appareil est conçu pour utilisation à une température
ambiante de 0 à 50 °C.
• Ne pas placer cet appareil sur ou près des sources de
chaleur comme l’équipement d’éclairage ou les
amplificateurs, ou dans un endroit exposé au soleil ou à
une humidité excessive, au risque d’endommager la
finition extérieure ou les composants internes de
l’appareil.
• Si l’appareil est utilisé dans des endroits très humides ou
poussiéreux, ou en présence d’un gaz actif, en nettoyer la
surface et les connecteurs avec un linge propre et doux
immédiatement après utilisation sans quoi sa durée utile
pourrait être écourtée.
• Ne jamais utiliser de dissolvant organique tel que du
diluant ou du benzène pour le nettoyage, au risque
d’endommager la finition de l’appareil.
• L’ajustement de cet appareil est très précis. Ne pas
modifier les composants internes ni essayer de les réparer.
Français
Français
FR
Table des matières
Précautions ......................................................................... 3
Aperçu ................................................................................ 4
Canaux sans fil sélectionnables ..................................... 4
Caractéristiques.............................................................. 5
Configuration système ................................................... 6
Identification des composants .......................................... 7
Alimentation électrique..................................................... 9
Raccordement .................................................................. 11
Remarques sur le fonctionnement du système de
microphone ................................................................. 11
Réglages ............................................................................ 12
Activation du mode de réglage .................................... 12
Changement du canal de transmission......................... 12
Changement du réglage de l’atténuation d’entrée ....... 14
Remise à zéro de l’indication de temps accumulé ....... 14
Messages d’erreur ........................................................... 15
Spécifications.................................................................... 16
Listes des canaux sans fil .............................................. L-1

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Aperçu
Modèle U68
Une bande de fréquence de 794 - 806 MHz est assignée au
modèle WRT-822A/68, qui lui permet de fonctionner sur
l’une des 94 fréquences porteuses du plan des canaux
original Sony par incréments de 125 kHz dans la bande des
canaux de télévision 68 et 69.
Pour connaîtrelescanauxsélectionnables,voir“Listesdes
canaux sans fil” à la page L-1.
Modèle U66
Une bande de fréquence de 782 -794 MHz est assignée au
modèle WRT-822A/66, qui lui permet de fonctionner sur
l’une des 94 fréquences porteuses du plan des canaux
original Sony par incréments de 125 kHz dans la bande des
canaux de télévision 66 et 67.
Pour connaîtrelescanauxsélectionnables,voir“Listesdes
canaux sans fil” à la page L-2.
Modèle U64
Une bande de fréquence de 770 - 782 MHz est assignée au
modèle WRT-822A/64, qui lui permet de fonctionner sur
l’une des 94 fréquences porteuses du plan des canaux
original Sony par incréments de 125 kHz dans la bande des
canaux de télévision 64 et 65.
Pour connaîtrelescanauxsélectionnables,voir“Listesdes
canaux sans fil” à la page L-3.
Le WRT-822A assure une excellente qualité sonore du
microphone proprement dit ainsi que toute la convivialité
requise pour les applications de journalisme électronique
(Electronic News Gathering - ENG), en direct et de
production électronique sur site (Electronic Field Production
- EFP). Utilisez ce transmetteur hautement fiable en
combinaison avec un système de microphone UHF sans fil à
bande de 800 MHz Sony pour vos activités de télédiffusion
et de production cinématographique.
Canaux sans fil sélectionnables
Le transmetteur et le syntoniseur du système de microphone
sans fil sont classés par bande de fréquence.
Une bande de fréquence de 12 MHz (ou deux canaux de
télévision portant des numéros consécutifs, par exemple 68
et 69 sur le modèle WRT-822A/68) est assignée à chaque
modèle de transmetteur et de syntoniseur.
Lors de la configuration d’un système de microphone UHF
sans fil, veillez à combiner un transmetteur et un syntoniseur
ayant le même numéro de canal de télévision.

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ACL pour la coordination des opérations
L’unité centrale intégrée CPU commande le fonctionnement
de l’appareil, y compris du circuit PLL. L’affichage à
cristaux liquides (ACL) indique le numéro/fréquence du
canal en cours, la puissance résiduelle des piles, le réglage
de l’atténuation d’entrée, le niveau de sortie AF et le niveau
d’entrée RF.
Une indication de la durée de fonctionnement cumulée est
également fournie pour pouvoir contrôler rapidement la
durée d’utilisation des piles (par incréments d’une minute).
Sauvegarde des réglages de canal et d’atténuation
d’entrée
L’appareil mémorise les réglages de canal d’atténuation
d’entrée lorsqu’il est mis hors tension. Les réglages
mémorisés sont conservés même si vous retirez les piles. Par
conséquent, vous ne devez pas recommencer les réglages
lors de la prochaine utilisation.
Atténuateur électronique hautement fiable
L’atténuateur de niveau d’entrée intégré est réglable dans
une plage de 0 à 21 dB par incréments de 3-dB. Il réduit la
distorsion du signal lorsqu’un signal audio excessivement
puissant est entré.
Compatibilité avec les microphones de Lavalier Sony
Le transmetteur est compatible avec les microphones de
Lavalier Sony, y compris l’ECM-77BC.
Caractéristiques
Système synthétisé en boucle à verrouillage de phase (PLL)
Le WRT-822A comporte un circuit synthétisé en boucle à
verrouillage de phase (PLL) élaboré.
Compact et léger
La technologie de montage haute densité innovatrice
employée et le boîtier en magnésium ont permis de créer ce
transmetteur compact et léger, qui vous permet de vous
déplacer n’importe où pour vos activités de journalisme
électronique (ENG) ou de production électronique sur site
(EFP).
Alarme de piles à distance sur le syntoniseur
Ce transmetteur est capable de transmettre des “informations
d’état des piles” à des syntoniseurs Sony qui supportent la
fonction d’indication d’état des piles sur le transmetteur et le
syntoniseur.
Les informations sont envoyées aux syntoniseurs environ
une heure avant l’épuisement de la pile de façon à ce que
vous puissiez remplacer les piles du transmetteur.
Alimentation sur piles ordinaires
Le convertisseur CC-CC intégré à haute efficacité assure un
fonctionnement stable d’une durée d’environ 8 heures en
continu avec deux piles alcalines LR6 (AA).

6
FR
Modèles Sony à bande de 800 MHz
Aperçu
WRT- Bande de fréquence Transmetteur ou microphone
Désignation de modèle
Syntoniseur
WRR-800A
WRR-801A
WRR-802A
WRR-805A
WRR-810A
WRR-820Ab)
WRR-840Ab)
WRR-850Ab)
WRR-855A
WRR-860Aa)
MB-806A
WRT-805A
WRT-807A
WRT-808A
WRT-810A
WRT-820A
WRT-822A
WRT-830Aa)
WRT-860A
WRT-867Aa)
822A Canaux de télévision Fréquence (MHz)
U64 64 770,125 - 775,875
65 776,125 - 781,875
U66 66 782,125 - 787,875
67 788,125 - 793,875
U68 68 794,125 - 799,875
69 800,125 - 805,875
Porteuse RF avec signal de tonalité
L’appareil transmet la porteuse RF accompagnée d’un signal
de tonalité, ce qui permet au syntoniseur à circuit à
commande par tonalité de ne prélever que le signal audio
cible reçu.
Large plage dynamique et faibles parasites
Le système à compresseur/extenseur (compander) permet
une transmission stable sur une large plage dynamique avec
un minimum de parasites.
Configuration système
a) Ces modèles couvrent uniquement
les canaux 68 et 69.
b) Ces modèles requièrent une antenne
UHF AN-820A et un diviseur
d’antenne UHF WD-820A UHF.
Le WRT-822A peut être utilisé avec les syntoniseurs
mentionnés ci-dessous.