Decade TRC-800 Manuale utente

HI-FI

STEREO

FMTRANSMITTERS

TRC-800

trRC-800S

INSTRUCTION

MANUAL

( USAversion)

9411-800-S

DECADE

TABLEOFCONTENT

SECTION

l: GENERAL

INFORMATIONS

A)Introduction

B)Description..

Warranty....

D)Warning.....

E)Technicalspecifications

SECTION

2: TNSTALLATION

A) Introduction

B)Receiving

inspection...

Connections.

D)Locationofthe

transmitter

andantenna.

SECTION3: OPERATION

A)Controls

andindicators

Input

and

output

connectors.....

C)Optimal

input

level.

SECTION

4: MAINTENANCE

AND ALIGNMENT

A)Maintenance

B)Frequency

selection..,,.,

power

level

adjustment

D)Bits

switchcodestable.

SECTION

5. APPLICATIONS

ANNEXES

r Adjustments

diagrams

r TRC-800technical

specifications

r TRC-8005

technical

soecifications

PAGE

SECTION1

GENERALINFORMATIONS

Introduction

Thank

you for purchasing

oneof the fineproducts

made

by DECADE

transmitters.Your new TRC-800 or TRC-800SHl-Fl STEREOFM

TRANSMITTER

is a veryhigh

performance

andhighreliability

piece

equipment.Before

using

it,please

read

thismanual

carefullyin orderto

obtain

the best possible

results

from your transmitter.The manual

contains

installation,

operation

andajustements

procedures

for DECADE

TRC-800

Watt)

Hi-Fimono

andTRC-800S

Watt)

of Hi-Fi

Stereo

Transmitters.

Description

TRc-800

andrRC-800S

transmitters

include

a crystal

controlledVCo,a

stereo

generator

(TRC-800S

only),

a RF

power

amplifier

and

a spurious

filter.Theyaccept

leftand right

audiosignals

on two types

of input

connectors:

I XLR3

600 Ohmsbalanced

inputs,

withsignallevels

ranging

from

-1

dBmmin.

to +22 dBmmax.;

I 114"

10K

ohmsunbalanced

inputs,

with

signallevelsranging

from

-15

dBmmin.

to +39 dBm

(70

VRMS)

max.

lnputlevel

canbe ajustedfrom

the INPUTLEVEL

control

on thefront

panel,

inorder

to get

theoptimum

modulation

level.

That

usefulfeature

makes

DECADE

transmittersvery versatile,

allowing

them to accept

audio

signalsfrom

many

sources:

cD players,

tape

decks,mixing

boards,

cinema

projectors,

etc.

Warranty

TRc-800

andrRC-800S

tranmitters

comewith a two (2)

years

warranty

thatcovers

parts

replacement

andlabor

required

to repair

anydefects

resulting

from

themanufacturing

process.

All

claimsmust

beauthorised

by DECADE

prior

to shipment

of a faulty

unitfor repairs

anda copyof

the

invoice

must

beincluded

the

shipment.

Shipingfees

areassumed

the

clientandDECADE

will

pay

for

thereturn

ofthe

repaired

unit.

D) Warning

DECADE

transmittersoperateonthe87.9MHz

- 107.9

MHZ

commercial

FMbroadcastband,sosignals

transmittedby themcanbereceived

anystandard

FMreceiver.Thus,

somecareshould

betakenin the use

made

outof

thesetransmitters.

DECADE

transmitters

inc.isnotresponsible

foranyloss

of profit

or laws

violation

duringtheutilisationof

theirtransmitters.

The CRTC (Canadian Radio-television

and Telecommunications

Commission)andthe DOC

(Department

Of Communications,

Canada)

legislate

theuseof FM

transmitters.Nolicence

isrequiredforindoor

use

ofthesetranmitters,aslong

thetransmitted

signal

ismostly

contained

inthebuildingintended

to becovered

bythe

transmitter

(ex.:

a concert

hall,

a church,

a theatre,etc.)Formost

applications,

a RF

power

level

from1 to 5 mWattsis

sufficientfor indoor

uses.

There

isa simple

test

thatcanbe performed

to verify

if the power

level

is adequate:with a

walkman

tuned

to the transmitter

frequency,

check

if the reception

good

everywhere

in the hall,

with no deadspots

(distortion,

noise

weakreception),

Then,

go outside

of the building

andmake

the same

verification,

except

thatthis

time,

youmust

have

bad

reception

(or

reception

atall)

around

thebuilding,wich

means

that

power

level

isnot

too

high

and

thusadequate

forindoor

use.lfyou

still

getgood

reception

outside

the building,

youwillhave

to lower

the RF

power

level

of the

transmitter

(refer

tomaintenance

andalignement,

section4).

For

outdoor

uses

CRTChasreleased

many

public

notices

on low power

transmitters,

allowing

their

use

specific

applications

such

as:

I drive-in

theatres;

r private

touristicand

attraction

siteswith

admissionfees;

I special

events

coveragenot exceeding

28 consecutives

daysin

duration;

r any

application

operating

under

theCRT-74regulations,

wich

allows

a tranmittingrange

of about

200 to 600 feet,

depending

on the

type

ofreceiver

used.

REFERENCES: public

notices

CRTC1993-45,

CRTC

1993-95

and

CRTC1990-1

11.

Technical

specifications

Refer

toannexes,

Technical

specifications

ofrRC-800

and

rRc-800s.

sEcTtoN

INSTALLATION

Introduction

Installation

of aDECADE

transmitter

includes

the

following

steps: 1)

receivinginspection;

2)mountingina rackorona shelf;3)connection

of the

ACsupplyand

audio

source;

location,installationandconnection

ofthe

antenna.

Receivinginspection

Checkthe transmitter

packaging

for any damagethat could have

occured

theshiping.

lf you

find

any

damage

thetransmitter,

keep

the packaging

for claiming

purposes

with the freightcompany.Any

damageshouldbe

noted

onthe

receiving

slipatthetimeofdeliveryand

the freight

company

advised

within 5 workable

days following

the

deliveryofdamagedunits.

Connections

After

installation

of thetransmitter

ina rack

or on a shelf,

plug

theAC

cable

inthe

AC receptacle

ontheback

panel,

andconnect

to a 12OV,

60 Hz

grounded

ACsocket.As withany

grounded

electricequipement,

it isnot

recommended

to use

a DECADE

transmitter

without

a grounded

AC socket,or removing

thegrouding

on thecable,

sincethat

may

resultin

shock

hazardsfor

thestaff

contactwithit.

Location

ofthetransmitterandantenna

DECADE

transmitters

aredesigned

for indoor

or outdoorusein a dry

environment,in temperatures

ranging

from -20 to 60 'C. In orderto

obtainoptimum

performances,

itis

recommended

to place

them

farfrom

anyelectromagnetic

noisesource

(transformers,

motors,

etc.).

Antenna

shouldbe

located

ascloseto the

centerof the

hall

orcoverage

area

possible,

and

ata sufficient

height

to give

thetransmitted

signal

aunobstructed

path

to everyseatorreceiving

point.

Concrete

walls

and

steel

beam

orsheets

greatly

attenuate

radio

waves,soavoidto have

the

transmitted

signal

path

going

through

them,Onthe

otherhand,

windows

arevery

permeable

to radiowaves,

so avoidlocatingthe antenna

near

themif

you

wish

to restrain

thecoverage

tothe

interiorofa building.

sEcTtoN3

OPERATION

Controls

and

indicators

TRC-800

and

TRC-800S:Input

level

controledbya

stereo

(TRC-800S)

potentiometer,

labeledINPUTLEVEL

and

located

onthe

front

panel.

One

ledindicates

the

modulationlevel:OVER

(red),

wich lightsup when

the

modulation

levelis equalor greater

than 2OOo/o,wich indicates

overmodulationstate

and

could

resultin distortionat thereceiving

end,

The OVER

indicatorshouldnever

or rarelylight,in order

to avoid

distortion.

Toallowa better

perception

of this

indicator,itsholding

time

hasbeen

lenghtened,

becauseof its

importance.

The

TRC-800S

transmitter

canbe

switched

frommono

to stereo

mode,

orderto let

you

usethebest

mode

for

yourparticular

application.

The

stereoselector

islocated

onthe

front

panel.

Whenin stereo

mode,

the

STEREO

indicatorlights

up, In mono,

onlythe RIGHTinput

is active

(balanced

orunbalanced)and

the

LEFTinputisignored.

Input

andoutputconnectors

TRC-800

and TRC-800S

transmitterscome with two sets of inputs:

RIGHT

and LEFTXLR3 balancedinputs

and RIGHTand LEFT114"

unbalanced

inputs,wich are the two most popular

types of input

connectors.

The RF outputhas a female

UHF (PL)

connectorand typicalload

impedance

is 50 Ohms.

Antenna

cable

(RG-8

or RG-58)

shouldnor

exceed200 feetin lenghtf

or RG-8

and

100feet

for RG-58,inorderto

minimise

the

power

lossin

thecable.

Optimal

input

level

Optimal

inputlevel

is reachedwhen the OVER

modulationindicator

remains

offmost

ofthetime.Adjust

the

inputlevel

controlto meet

that

condition,

lB qz&- 323

L-/ -::, --l -)>

MAINTENANCE

AND ALIGNMENT

A) Maintenance

No maintenance

is required

to keep

the transmitter

in top operating

condition.

lf anexternalcleaningappears

neccessary,

usea soft,damp

clothand

mild

soaponly,

Frequency

selection

The

transmitting

frequencyis

programmed

atthe

factory.lf a changeof

the

frequencywas

required,follow

thesesteps:

) from

the<bits

switch>codestable,on the next

pages,

select

the

appropriate

<bits

switch>codefor your

chosenfrequency

andset

the <bits

switch,,on the main boardaccordingly.

Refer

to the

,,adjustments

diagrams>attheendofthe

manualfor

the

location

the

<bits

switch>.

Connect a DC voltmeter

to the alligator

clips, with the positive

terminal

(+, red)

of the voltmeter

on the red

alligatorclip

andthe

negative

terminal

(-, black)of the voltmeter

on the black alligator

clip.

Selectthe 20 VDCscaleon the

voltmeter.

Using

a small,

non-conductive

flat screw-driver,turn the COARSE

tuningadjustmentof the VCO

until

you read

between0.5 and7.5

volts,Then

turn the FINE

tuningadjustmentuntil

you get a reading

between 3.0 and 5.0 volts. Your transmitteris now stabilisedon

theselected

frequency.

power

level

adjustment

A smallwhite

trimpot

labeledPOWER

(PWR)

and

locatednear

the<bits

switch>is usedto controlthe RF

power

level

of thetransmitter.

Turn

clockwise

to increaseRF

power

level

andcounterclockwise

to decrease

rt,

D) Bitsswitch

codestable

Freq

(MHz) 110

87.9

88.1

BB.3

BB.5

BB.7

ON OFF OFF ON OFF OFF ON OFF OFF OFF

ON OFF OFF ON OFF OFF OFF ON ON ON

ON OFF OFF ON OFF OFF OFF ON ON OFF

ON OFF OFF ON OFF OFF OFF ON OFF ON

ON OFF OFF ON OFF OFF OFF ON OFF OFF

BB.9

89.1

89.3

89.5

89.7

ON OFF OFF ON OFF OFF OFF OFF ON ON

ON OFF OFF ON OFF OFF OFF OFF ON OFF

ON OFF OFF ON OFF OFF OFF OFF OFF ON

ON OFF OFF ON OFF OFF OFF OFF OFF OFF

ON OFF OFF OFF ON ON ON ON ON ON

89.9

90.1

90.3

90.5

90.7

ON OFF OFF OFF ON ON ON ON ON OFF

ON OFF OFF OFF ON ON ON ON OFF ON

ON OFF OFF OFF ON ON ON ON OFF OFF

ON OFF OFF OFF ON ON ON OFF ON ON

ON OFF OFF OFF ON ON ON OFF ON OFF

90.9

91.1

91.3

91.5

ON OFF OFF OFF ON ON ON OFF OFF ON

ON OFF OFF OFF ON ON ON OFF OFF OFF

ON OFF OFF OFF ON ON OFF ON ON ON

ON OFF OFF OFF ON ON OFF ON ON OFF

ON OFF OFF OFF ON ON OFF ON OFF ON

92.1

92.3

92.5

92.7

ON OFF OFF OFF ON ON OFF ON OFF OFF

ON OFF OFF OFF ON ON OFF OFF ON ON

ON OFF OFF OFF ON ON OFF OFF ON OFF

ON OFF OFF OFF ON ON OFF OFF OFF ON

ON OFF OFF OFF ON ON OFF OFF OFF OFF

92.9

93.1

93.3

93.5

93.7

ON OFF OFF OFF ON OFF ON ON ON ON

ON OFF OFF OFF ON OFF ON ON ON OFF

ON OFF OFF OFF ON OFF ON ON OFF ON

ON OFF OFF OFF ON OFF ON ON OFF OFF

ON OFF OFF OFF ON OFF ON OFF ON ON

93.9

oA1

94.3

94.5

94.7

ON OFF OFF OFF ON OFF ON OFF ON OFF

ON OFF OFF OFF ON OFF ON OFF OFF ON

ON OFF OFF OFF ON OFF ON OFF OFF OFF

ON OFF OFF OFF ON OFF OFF ON ON ON

ON OFF OFF OFF ON OFF OFF ON ON OFF

94.9

95 1

953

95.5

957

ON OFF OFF OFF ON OFF OFF ON OFF ON

ON OFF OFF OFF ON OFF OFF ON OFF OFF

ON OFF OFF OFF ON OFF OFF OFF ON ON

ON OFF OFF OFF ON OFF OFF OFF ON OFF

ON OFF OFF OFF ON OFF OFF OFF OFF ON

I5.9

96.1

963

96.5

96.7

ON OFF OFF OFF ON OFF OFF OFF OFF OFF

ON OFF OFF OFF OFF ON ON ON ON ON

ON OFF OFF OFF OFF ON ON ON ON OFF

ON OFF OFF OFF OFF ON ON ON OFF ON

ON OFF OFF OFF OFF ON ON ON OFF OFF

96.9

97.1

97.3

97.5

97.-I

ON OFF OFF OFF OFF ON ON OFF ON ON

ON OFF OFF OFF OFF ON ON OFF ON OFF

ON OFF OFF OFF OFF ON ON OFF OFF ON

ON OFF OFF OFF OFF ON ON OFF OFF OFF

ON OFF OFF OFF OFF ON OFF ON ON ON

Freq.

(MHz) 1 z 510

97.9

98.1

98.3

98.5

oa7

ON OFF OFF OFF OFF ON OFF ON ON OFF

ON OFF OFF OFF OFF ON OFF ON OFF ON

ON OFF OFF OFF OFF ON OFF ON OFF OFF

ON OFF OFF OFF OFF ON OFF OFF ON ON

ON OFF OFF OFF OFF ON OFF OFF ON OFF

98.9

99.1

99.3

99.5

99.7

ON OFF OFF OFF OFF ON OFF OFF OFF ON

ON OFF OFF OFF OFF ON OFF OFF OFF OFF

ON OFF OFF OFF OFF OFF ON ON ON ON

ON OFF OFF OFF OFF OFF ON ON ON OFF

ON OFF OFF OFF OFF OFF ON ON OFF ON

99.9

00.1

100.3

00.5

1007

ON OFF OFF OFF OFF OFF ON ON OFF OFF

ON OFF OFF OFF OFF OFF ON OFF ON ON

ON OFF OFF OFF OFF OFF ON OFF ON OFF

ON OFF OFF OFF OFF OFF ON OFF OFF ON

ON OFF OFF OFF OFF OFF ON OFF OFF OFF

100.9

101

101.3

101.5

101.7

ON OFF OFF OFF OFF OFF OFF ON ON ON

ON OFF OFF OFF OFF OFF OFF ON ON OFF

ON OFF OFF OFF OFF OFF OFF ON OFF ON

ON OFF OFF OFF OFF OFF OFF ON OFF OFF

ON OFF OFF OFF OFF OFF OFF OFF ON ON

101

102.1

102.3

102

102.7

ON OFF OFF OFF OFF OFF OFF OFF ON OFF

ON OFF OFF OFF OFF OFF OFF OFF OFF ON

ON OFF OFF OFF OFF OFF OFF OFF OFF OFF

OFF ON ON ON ON ON ON ON ON ON

OFF ON ON ON ON ON ON ON ON OFF

02.9

03.1

103.3

03.5

103.7

OFF ON ON ON ON ON ON ON OFF ON

OFF ON ON ON ON ON ON ON OFF OFF

OFF ON ON ON ON ON ON OFF ON ON

OFF ON ON ON ON ON ON OFF ON OFF

OFF ON ON ON ON ON ON OFF OFF ON

103.9

104,1

04.3

04.5

104.7

OFF ON ON ON ON ON ON OFF OFF OFF

OFF ON ON ON ON ON OFF ON ON ON

OFF ON ON ON ON ON OFF ON ON OFF

OFF ON ON ON ON ON OFF ON OFF ON

OFF ON ON ON ON ON OFF ON OFF OFF

04.9

105.1

105.3

05.5

05.7

OFF ON ON ON ON ON OFF OFF ON ON

OFF ON ON ON ON ON OFF OFF ON OFF

OFF ON ON ON ON ON OFF OFF OFF ON

OFF ON ON ON ON ON OFF OFF OFF OFF

OFF ON ON ON ON OFF ON ON ON ON

05.9

06.1

IUb.J

06.5

106.7

OFF ON ON ON ON OFF ON ON ON OFF

OFF ON ON ON ON OFF ON ON OFF ON

OFF ON ON ON ON OFF ON ON OFF OFF

OFF ON ON ON ON OFF ON OFF ON ON

OFF ON ON ON ON OFF ON OFF ON OFF

106.9

107.1

107.3

107.5

107.7

107.9

OFF ON ON ON ON OFF ON OFF OFF ON

OFF ON ON ON ON OFF ON OFF OFF OFF

OFF ON ON ON ON OFF OFF ON ON ON

OFF ON ON ON ON OFF OFF ON ON OFF

OFF ON ON ON ON OFF OFF ON OFF ON

OFF ON ON ON ON OFF OFF ON OFF OFF

sEcTtoN5

APPLICATIONS

TheTRC-800

TRC-800-Smodelsare

certifiedunder

FCC

Part73 regulations.

A license

orexperimental

licenseisrequired

for

operationofsuchFM

transmitters

USA.

Pleasecontact

your

nearestFCC

bureauformore

details,

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