Williams Sound T4 Manual de usuario

Williams

Sound

Corp.

Personal

PA/FM

Broadcasting System

Installation

and User Manual

for

Transmitter Models

and

T4P

and Receiver Models

R7-4,

and

R7\00

Personal

Broadcasting System

INSTALLATION AND USER MANUAL

lhmsm

ltter Controls and Features

.................

.•...•..•....

Tran

smitter Set-up and Operation •

..........•

....

...

.....

Antenna Connection

••

•.

••

. ,

...•..•......

.............

Power

Connection

.....

..........

...........

...

.......•.

Audio Connection

........•.............................

•

...

Using Microphone Inputs with the Model

T4P

Transmitter

•

• 6

Audio Level Check

.....•.

. . .

.....

....

.....

..••..•.•..

Setting the "

Cut" Switch

.•...

.......

• . .

•

.•.

•.

•..

System Check-out

...

.........

•

•.•.•...

.•............

Receiver Instructions

........

.•..................•........

Receiver Management

...

.................••..

. . .

..•..

.....•.

Battery Information

...............

.........

.......••..

....

Remote Coaxi

Antenna Installation

..................

.•.•....

Troubleshooting for the Model

Transmitter .

....••.

........•...

Troubleshooting f

the Model T4P

Tra

nsmi

.....

.•

• . .

....

io Interference Problems

.....

.........

...

......

....

System Specifications

...............

.....

. .

....

........

Personal

System Installation

INTRODUCTION

The Personal PA/FM Broadcasting System has been designed for easy

installation by persons with minimal

electroniCi:

experiehce. Some

ex-

perience with sound systems will be helpful. Please read the manual com-

pletely and pay close attention to the antenna location guidelines if the

remote antenna is used. Taking a few minutes now to read the instruc-

tions

save time and ensure proper system operation.

TRANSMITTER CONTROLS AND FEATURES,

MODELS

AND T4P

Tt)ere are two Personal PA/FM Transmitter models. Look at the drawings

below to identity your Transmitter.

ON AUlllD

Model

Front Panel Jacks

The

Transmitter does not have microphone jacks on the front panel.

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Model

T4P

The

T4P

Transmitter has three jacks on the front panel. "Mic 1;·

Mic 2,"

and "Tape Out." The "Mic 1" and

"Mic

jacks are low-impedance, un-

balanced microphone inputs tor dynamic

electret microphones. Both

microphone inputs are mixed together

the Transmitter. The

ape Out"

jack is a

Ohm line level output for tape recording or feeding a sound

system.

Front Panel Indicators

The Transmitter front panel has two indicator lights, "POWER" and

'.AUDIO."

The "POWER" light shows that the unit is on, and the '

'.AUDIO

light indicates sufficient audio input level. Because the Transmitter draws

very little power, it ,does not have a power switch and can be left plugged

continuously.

-1-

Rear Panel Controls and Connections

Model

and

T4P

have identical rear panel controls and connections.

Refer

Figure

PERSONAL

P,4/FM

Tran.mllte<

t.'odel

PPA

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Figure

The "Hi-Z Line Input" is an unbalanced, high impedance input for line

level signals

(0.04

to 4 Vrms).

The

"Lo-Z

Bridging Line Input" is a balanced bridging input for line

level signals from professional balanced line systems. Both line inputs are

mixed within the Transmitter.

The "Input Atten" Switch is used with the '1\udio" indicator light to set

the proper line input level. The "0" (left) position does not attenuate or

reduce the line input level. The

"-20"

(center) position attenuates the line

input signal 20 dB. The ·•

-40"

(right) position attenuates the llne input

signal 40 dB.

The "

Cut" Switch provides low frequency attenuation. The

" (left)

position does not reduce the low frequencies. The

"1"

(center) position

the recommended position and provides a slight low frequency cut (

-10

80 Hz). The ''2" (right) position provides a steep low frequency cut

(

-10

dB at 240 Hz). The

"Lo

Cut"

switch is used to temporarily overcome

hum problems produced by the sound system or to tailor the Personal

System frequency response. It is sometimes desirable to cut low fre-

quencies to improve speech intelligibility for hearing impaired listeners.

The

_,Rem

ote Antenna" Connector

a 75 Ohm, F-type connector for

the optional Coaxial Antenna.

The "Monitor" Jack is used to monitor the input signal to the Transmit-

ter stage. An

8-16

Ohm earphone

headphone plugs into the 3.5mm jack.

TRANSMITTER SET-UP AND OPERATION

Step

Install the Whip Antenna

The whip antenna fits into the hole on top

the Transmitter cabinet. Push

the antenna straight through the hole. The antenna threads onto a bolt

mounted on the circuit board. Guide the antenna onto the bolt and turn

it clockwise to tighten.

only needs to be finger-tight. Extend the antenna

its

full height when ready for use.

Alternately, the optional half-wave Coaxial Antenna may be used instead

of the Whip Antenna if the system will be rack mounted. The Coax An-

tenna attaches to the connector labeled "Remote Antenna" on the back

of the Transmitter.

See page

for further instructions on using the Coaxial Antenna..

Step 2. Connect the Transmitter to Power

Power

Plug the power cord into a

120

Volt,

60 Hz outlet. There

no power switch

on the Transmitter, so it will be on continuously when it is plugged

in.

The

green "Power" indicator on the front panel of the Transmitter should glow

when the power is connected,

Step

Audio Connections

Connecting the Transmitter to a sound system amplifier:

"The Hi-Z Line Input" is the most commonly used input connection. The

"Lo•Z Bridging Line Input" is used with professional balanced line sound

systems.

use the "Hj.Z Line Input":

Locate the audio cable included with the system. It has an RCA connec-

tor on both ends. Plug one end of the audio cable into the Transmitter

''Hi-Z Line Input" jack. The other end plugs into an audio output jack on

the sound system amplifier or mixer. Suitable connections are:

1st

Choice: "TAPE OUT"

"LINE OUT'' jack

2nd Choice: "BOOSTER"

"BRIDGING" jack

3rd Choice: Speaker Terminal, 8 Ohm tap

---------

"Tape

Out"

"Line Out Connection

Refer to Figure 2.

Make sure the jack is an OUTPUT jack. An INPUT jack will not provi

the

proper signal level.

Amplifier

T~PE

Mixer @

Figure 2

you have a tape recorder connected to the "

TAPE

ack

, you may

order a Y-connector (Part No.WCA 003) from Williams Sound,

purchase

one at a local stereo

radio parts store. The Y-connector allows both the

tape recorder and Transmitter to

plugged into the TAPE

OUT

jack as

in Figure

Power

Unit

'(-C

ONNECTOR

Tape

corder

Figure 3

BOOSTER OR BRIDGING JACK CONNECTION

See Instructions for TAPE OUT

LINE

OUT

connection.

NOTE:

Some

amplifiers use 1/4" phone jacks for audio connections. If

your amplifier or mixer has this type of jack, you will need to order a

1/4

phone plug to RCA jack adaptor (Part No. CNA 007) from Williams Sound,

purchase one

a local radio parts store.

Speaker Terminal Connection:

the

amplifier

does

not

have

suitable

line

level

output jack, the

Transmit-

ter

may

connected

the 8

Ohm

speaker

terminals.

This

type

con-

nection

may

noisy or susceptible

interference.

not connect

the

Transmitter

remote

speaker

location

or interference

likely.

CAUTION!

not connect

the

Transmitter

volt

speaker

terminal

the unit will

damaged.

connect

the

audio cable

the

speaker

terminals,

cut off

one

the

RCA

plugs

and

strip

the

wires.

Refer

Figure

for

connection

detalls.

Amplifier

SPEAKERS

Audio

Cable

c:=::::::,.._J

Figure

use the "Lo·Z Bridging Line Input":

The

Lo-Z

Bridging

Line

Input

10K

Ohm,

balanced

bridging input

for

connection

professional

balanced

line

systems.

Use

shielded

cable,

and

appropriate

XLR

connectors

connect

the

Transmitter

to a

balanced

line-

evel

mixer

amplifier

output.

Refer

Figure

for

connection

details.

Mixer

LINE

OUT

Wiring Diagram, Microphone Cable

XLR

Audlo

Cable

•

..___

....

---

!.----

• ----...

Figure

-5-

USING DIRECT MICROPHONE INPUTS WITH

THE

T4P

TRANSMITTER

The

T4P

Transmitter has been designed to

accep~

two low-impedance

microphones with 1/4" plugs. It can accommodate either dynamic or elec-

tret microphones. The microphone(s) plugs into the ''Mic 1" or "Mic 2"

jack on the front panel of the Transmitter. Williams Sound offers several

microphones for use with the

T4P

Transmitter. If you wish to use a dif-

ferent microphone, follow these wirlng guidelines.

Dynamic Mies:

Use a Mono

1/4"

Phone Plug.

Connect the positive (in-phase) lead

the tip of the plug. Connect the

negative (return and shield) leads

the sleeve of the plug.

Electret Mies Which Include a Battery:

Follow directions for Dynamic Mies above.

Electret Mies Without a Battery:

Use a Stereo 1/4" Phone Plug. Connect the positive (in-phase) lead

the

ring

of the plug. Connect the negative (return and shield) leads

the

sleeve.

not make any connection to the tip of the plug.

If the microphone is connected properly, speaking into it should cause

"Audio'' indicator light to flash. The two mic(ophone inputs are mixed

in the

T4P

preamplifier stage. The microphone inputs are also mixed with

the line level input for voice-over effects, etc.

the

T4P

connected

a sound system, follow the directions given

for the standard-Model

on page 3.

Step

Check Audio Level.

If you are using the

T4P

Transmitter with line inputs, you will now

need a program source for the Personal

PA.

Have someone speak into

a sound system microphone or connect a tape player or radio

play music

through the sound system. Make sure the sound system is on.

check

the audio level:

Start with the "Input Atten" switch set to the

-40

dB (right) position.

Plug one of the Receiver earphones into the "Monitor" jack. Listening

with the earphone, you should be able to hear the program source

clearly.

Watch the '1'.udio" lndlcator light on the front panel.

4. If the Audio light is not flashing, move the "Input Atten" switch to the

-20 dB (middle) position.

5, If the Audio

light

still does not flash, move t~e "Input Atten" switch to

the odB (left) position.

With the proper input level, the Audio indicator light will flash regularly,

in time with the program source. Optimum input signal level is

0.04

Volt

rms to 4 Volt rms. If you cannot achieve this input level with the

Input

Atten" switch, you will have to adjust the level at the program source.

you are using the

T4P

Transmitter with direct microphone inputs, set the

Input Attenuator Switch on the back panel of the

T4P

Transmitter to the

"-40

dB"

(right) position to reduce residual noise. The input attenuator

switch affects only the line level inputs. The "AUDIO" light should flash

when someone speaks into the Personal

microphone.

Step

Set the "Lo

Cut"

Switch

Start by setting the "Lo

Cut"

switch on the "1" (center) positioh. The "Lo

Cut'' switch affects both the microphone and line inputs. It can

used

to reduce hum from line level inputs

to improve speech intelligibility for

hearing impaired listeners. Most hearing impaired listeners lose sensitivi•

ty to high frequencies. Setting the Lo Cut switch in the "1" or

"2"

positioh

flattens the perceived system frequency response. The

"Lo

Cut"

switch

function is detailed

page 2.

Step 6.

Test

the System with a Receiver

Open a Receiver box and install the battery and earphone, folloWing the

receiver instructions. Stand near the antenna and turn the receiver on.

Listen for the broadcast, using the program source you connected earlier.

If you can't hear the broadcast, first try another Receiver

another bat-

tery.

you

have ordered rechargeable batteries, note that they are shipped

in a discharged state. They must be charged for

14-16

hours before their

initial

use.

If these suggestions don't work, consult the troubleshooting

section. ·

Step

Check the System Range

Slowly walk away from the antenna while listening with the Receiver.

Walk throughout the seating area to check the range.

You

may find cer-

tain areas where the signal suddenly disappears. This is called a

"drop--

out"

and is a normal occurence within a building due to reflections and

cancellations

the radio signal. Moving slightly to the right or left will

restore the signal.

THE

SYSTEM

WORKING

CORRECTLY:

The orange "Audio" light

the front of the transmitter should flash regular-

ly with the input signal. The signal should

clear and undistorted in the

receivers. A slight amount of background hiss is normal. A hum

buzz-

ing sound indicates a problem. System range should be 300 to 500 feet

between the transmitting antenna and the receivers.

-7-

PERSONAL

RECEIVER

INSTRUCTIONS,

MODELS

R7,

R7M,

R7-4

AND

R700

Instructions for Models

R7,

R7M, and

R7-4:

Plug the earphone into the jack. The listener should use the earphone in

their best ear. If the listener wears a hearing aid, they should remove

It and use the earphone in its place. For more severe hearing losses,

the listener may use the optional Neckloop_(Part No. NKL

001)

with their

hearing aid if the aid is equipped with. a

" (telecoil) switch.

A variety of earphone and headphone devices are available from

Williams Sound to suit individual preferences and degrees of hearing

loss. See publication SPC

011.

2. Battery Installation

Replacement-Open

the battery compartment

by lifting the thumb tab at the bottom ofthe Receiver. Connect the bat•

tery to the snap. Wind excess wire around the battery posts. Slip the

battery into its compartment and snap the lid shut. Avoid excessive

twisting or pulling on the battery wires.

3. Turn the Receiver on by rotating the control knob in the direction of

the arrow on top of the case.

Turn

ing the knob in the direction of the

arrow will increase the volume. Turning the knob against the arrow will

decrease the volume.

avoid battery drain, make sure the Receiver

is turned off when not in use. If the Receiver is left on, the battery will

go dead overnight.

For Models

R7M

and

R7-4

, refer to the instructions included with the

Receiver for additional user information.

Instructions

for'

Model R700 Monitor Receiver:

1. Plug the R700 power cord into a 120

VAC

, 60 Hz electrical outlet.

2. Attach the wire antenna (included)

the antenna connector on the rear

panel of the receiver.

Turn

the power switch on and turn the volume co

rol up until you hear

the signal from the transmitter.

Optional antennas are available to extend the pick-up range of the

R700

The ANT 003 Mic-Stand Antenna or the ANT 006 Coaxial Antenna,

may be used with R700.

5. An external loudspeaker may be used instead of the lnternal

loudspeaker in the R700. Connect the (+) terminal of the loudspeaker

to the tip connection of a

¼"

mono phone plug. Connect the (- ) ter-

minal of the loudspeaker to the sleeve connection of the

phone

plug. The R700

Will

deliver approximately

maximum Into an 8 Ohm

speaker.

Este manual sirve para los siguientes modelos

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