Справочник Пользователя для Sony WRT-8B

Oscillator:

Crystal-controlled PLL synthesizer

Carrier frequencies:

AU model; 792 MHz to 806 MHz (TV channels 66 to 67)

Users may choose from 102 frequencies.

U model; 758 MHz to 782 MHz (TV channels 62 to 65) or 

782 MHz to 806 MHz (TV channels 66 to 69)
Users may choose from 188 frequencies on each model.

RF power output:

50 mW/10 mW (e.r.p.) selectable

Frequency response:

40 Hz to 20 kHz (typical)

Tone signal:

32.768 kHz

Type of antenna:

1/4 wave length wire (SMA-J type connector)

Reference deviation: 

±5 kHz (-60 dBV, 1 kHz input, MIC position)
±5 kHz (-20 dBu, 1 kHz input, LINE position)

Signal-to-noise ratio:

60 dB or more (A-weighted)

Attenuator adjustment range: 

0 to 40 dB, continuous

Max. input level:

-2 dBV (1 kHz input, MIC position)
+38 dBu (1 kHz input, LINE position)

Input level:

MIC level/LINE level switchable

Input connector:

Sony SMC9-4S type

Power requirements: 

DC 3.0 V (with two LR6 alkaline batteries)

Battery life:

Approx. 6 hours with Sony LR6 alkaline batteries at 25 °C (77 °F) at 50 mW output
Approx. 13 hours with Sony LR6 alkaline batteries at 25 °C (77 °F) at 10 mW output

Dimensions (W x H x D):

63 x 83 x 17 mm (2 1/2 x 3 3/8 x 11/16 inches)

Mass:

Approx. 140 g (4.9 oz) including batteries

Supplied accessories:

Soft case (x 1), spare battery case (x 1), microphone cable (x 1),
operation manual (x 1)

63.0 mm (2 

1

/

2

 inches)

17.0 mm 

(

11

/

16

 inches)

 Appro

x

. 200 mm (7 

7

/

8

 inches)

83.0 mm (3 

3

/

8

 inches)

Use of Sony wireless devices in the United States of America is regulated by the Federal

Communications Commission as described in Parts 15 and 74 of the FCC regulations.  

Users authorized thereby are required to obtain an appropriate license.

© 2002 Sony Corporation.  All rights reserved.

Reproduction in whole or in part without written permission is prohibited.

Features and specifications are subject to change without notice.

All non-metric weights and measures are approximate.

Sony is a registered trademark of Sony Corporation.

Distributed by

A Phase Locked Loop (PLL) frequency synthesized system is the core
technology used in the WRT-8B to achieve its outstanding carrier
stability, an essential performance factor in professional wireless
microphone systems.  This PLL-controlled system generates a highly
stable carrier frequency, which can be selected in increments of 125
kHz.  Users may choose from 102 frequencies with the WRT-8B AU
model, and from 188 frequencies with the WRT-8B U model.

The WRT-8B also transmits a 32 kHz tone signal along with the
program audio signal.  This tone is recognized by the squelch circuit
in Sony wireless microphone receivers so that the program signal is
only output when this tone signal is received.  This eliminates the
output of undesired signals and noise from other equipment, as well
as RF noise and popping when the transmitter is powered on or off.

The WRT-8B provides a choice of RF output powers.  The 10 mW
output is suitable for multi-channel operations such as in theater and
studio productions, while the 50 mW output is intended for the long-
distance transmissions typically required for sports and news
coverage.

The audio input level is selectable to either MIC or LINE level with a
switch on the side panel of the WRT-8B.  A variable attenuator is
located on the top panel.

This compact transmitter operates continuously for approximately 13*
hours on two AA-size alkaline batteries at 10 mW output power.  When
operating at 50 mW, it can operate continuously for approximately six*
hours.

*These times may vary depending on the operational environment.

An easy-to-read LCD indicates extensive information such as
operating channel/frequency, AF input level, RF output level,
transmitter battery status and accumulated operating time.  A red LED
indicator also flashes when the AF level exceeds a designated level.

As well as indicating battery status with the LCD indicator, a "low
battery warning" is transmitted which can be monitored by most Sony
receivers*.  In these receivers, a red LED starts flashing approximately
one hour** before the transmitter’s battery will be exhausted.

*WRR-810A, WRR-855A, WRR-855B receivers cannot receive the low battery warning.
**This may vary depending on the operational environment.

The WRT-8B accepts the output of a variety of professional lavalier
microphones fitted with an SMC9-4P connector, such as the Sony
ECM-77BC, ECM-44BC, ECM-166BC, ECM-310BC, and ECM-350BC. 

A-1094
MK7803V1TC02MAR

Printed in Japan on recycled paper