Siemens Q 20-A 1032 User manual with datasheet

SIEMENS

2Ol2 kW TV Transmitter

with Modulation at

Fixed lntermediate

Frequency

Band

lll

2Ol2

kW

TV

Transmitter

Band

ilt

with

Modulation

Fixed

Contents

1. General

2.

Special features

3.

Construction

4.

l\.4ode

5. Electrical data

description

of operation

at

lntermediate

Frequency

U

Published

Siemens

For

or other rights

Term6

For
in the

and Represenlatives

2

by

AG, Bereich

lhe

circuils,

ol delivery

questions

Federal

descriptions,

of third

on

Republic

Bauelemente,

parties

and rights

technorogy,

of Germany and

abroad

produkt-tnlormation,

and

tables indicated

are concerned.

to

change design

derivery

(see

list

and

of Sales

prices

Berlin

no responsibitrty

reserved.

prease

(West)

or the Siemens

Ofiices).

Balanstraße

contacr the

73, D-8ü)O

is assumed

offices

of siemens Akliengeseflschaft

Companies

as tar

München

palents

as

w

gO

1.

General description

This

2012 kW VHF band lll television transmitter contains two

separate amplifier

signals.

The standard version is
with the CCIB Recommendations

bandwidth). lf required
the FCC standard
OIFT standard
these

systems

chains, one

the

(525

(625

lines. B l\y'Hz channel bandwidth).

the transmitter is fully

lor vision

designed

for

(625

transmitter

lines.6 lvlHz

the other

operation

lines, 7 lviHz channel

can also be supplied to

for sound

in

accordance

channel bandwidth), or

color-compatible

NTSC. PAL or SECAN,4 standards.

lvlodulation

requirements

ty

signal level

translstors,

sound amplifier and diplexer
the

entire band lll range of 174 Io 23O l\.4H2. Before delivery,

they
The

at fixed lF assures the

with excellent long-term

stages up

power

the

tuned

are

to a

to 20

stages tetrodes. Both the

fixed

channel.

transmitter meets

stability.

power

W output

incorporate

picture

combining unit can be

The lower

transmitter is suitable for two-tone transmission according

to the IRT 2-carrier-process.
The layout

construction and
specifications of VDE
and the lEC.

Forced

from a three-phase
variations

is not

ol the equipment, the electrical and mechanical

safety devices are all

(Union

of German Electrical Engineers)

air cooling only is employed. The

t3o/..

greater

supplied as

380/220 V

than 37o, a mains regulator is required This

part

of the transmitter.

in

accordance

transmitter operates

50 Hz mains.

For

to the

gh qual-

h

and

tuned

with the

For

srlcon

over

mains

2. Special

ideas in

Latest
transmission and in air-cooled tetrode amplifiers

vision

stage

features

semiconductor drivers

in both the high

and

for vision and

pedormance

sound

in

lhe driver

final stages for

vision and sound.

Three tube stages, but only two types of tubes because driver
stage

vislon

and amplifier stage sound are

fitted with tubes

of

the same type.

l\,4odulation in vision and

power

frequency at

Common subcarrier frequency

section
Operation with

Sound section

low

bV incorporated

precision
prepared

sound section

level.

quartz

offset conditions

for mountihg of equipment suitable

for two-tone transmission in

process.

vision

Driver

sound assembled as independent units in one

generation
oscillator.

accordance with

at a fixed intermediate

for vision and sound

possible.

iRT 2-carrier-

"cabinet".
Comfodable servicing

using slide-in
prestages

and logical monitoring

Clear

cassette systems

vision/sound and

Non-volatile storage

memory
Exclusive use of silicon semiconductors in the driver interlock-

ing
Electronically

locations.

equipment

and

regulated

ciocked switched-mode

and in the semiconductor linear
The high voltage

provided

by modular construction

for

functional

the

of the control

panels.

of operations and interlocking.

maior faults at

of

power

supplies.

supply voltage for the

power

supplies

power

supply units contain silicon rectifiers

power

ampliliers.

in

the slide-in cassettes

units of the

failure;

driver

total of

from

with controlled breakdown voltage.

lndividual

voltage for

electronic control

tube.

each

of control

grid

and

screen-grid

49

3.

Construction

The

transmitter

system".

unbolted

tinal

Simple

cabinets,

amplilier

vision/sound

on castors.

Cooling
cabinets

air

can be

or lhrough

tomer's requirements.

The

transmitter

termediate

a mobile
All

assemblies,

cooling

The

Driver

including

equipment,

transmitter

vision/sound,

together

interlocking.
The

structural

cabled

together.

the

caotnet.

Dnvet

stage

wrth

v sron

power

with

Final

stage

the

using

power

with
LV2
stage LV3

suppljes.
RF

combining

with

diplexer

panel.

The

cabinet. The
housrng

Cooling

consisting
ln view

not

such th,ngs

equipment

of the

be housed

can be

floor.

transmitter.

with the

consjsts

semiconductor

with

control

units

The lower

(catiage

driver

supply

vision/sound,

amplifiers,

tetrode FIS

usjng

unit,

vision/sound

vision/sound

remaining

of filters,

noise

in the

sound-absorbing

4

is

built according

assembly

and mounting

supplied

the lloor

set up

Small

size

exception

are

housed

of the following

BTV (cabinet

linear

panel

are fitted

"Frame

amplifier

and

Vj

half

D)

LV1

equipment.

i.e.

2026

teüode

KE

type

(cabinet

fot

diplexer

space is

as measuring

blower

and

produced,

transmitter

one.

.modular

to the

of lhe transmitter

of the

driver

on units

either

permits

plales,

on a

in

cabinets.

that

are

through

depending

solid flat

setting

of the

necessary

cabinet

V)

amplifiers

for

switching

in

a

'occupies

contarns

using

(cabinet

BTE

the 20

CL.

and the

yL

1057

2O/2

occupies

at

piping

the

room

for vision

on transmitter

.frame

V1,,

the

tetrode

kW vision

2 kW

together

K)

kW and

the

client,s

equipment.

up

to

cooling

equipment

but

rather

E)

the lower

packaging

by

means

stage

and the

easily wheeled

the

top

of the

on the

floor,

without in_

up in

a container

external

units:

and sound

and are fixedly

upper half

yL

sound

RF

of

1057

amplifier

amplifi;r

power

with

changeover

ihird

disposal for

5 metres long.

should

in

an adjacent

of eäsily

out

cus_

and

complete

stage

the

of

good

The

the
control
the

long-term

transmitter

system issues

status information

transmitter

control
An

panel

interlock loop

any incorrect

must

be

adjusted from

as

way that
The

points,
greater
mechanically

the
breaker

sures

the
The

tinuous

the operator

mode

and

than 42

operators

in

accordance

that betore

energy

transmjtter

monjtoring

currents. ln

panels

of some
measuring
dicate

dislurbances

individual

The

stages.

quality

be checked

frequency pre-corrector

control

outputs

equipment.

with direclional

instruments
Extended

rack

as VF

monitorjng

in

the transmitter.

picture

ideally

is manned,

(in

the first

ensures

commands.

stabiljty

of the

suited for

instructions
back

to the

it

is

controlled

cabinet).

that no

Control

time

to

in no

time,

danger

is

operating

unmanned

to the

control

damage
knobs

of construction guarantees

connectors

locked.

without

sources

is fitted

V

are

out of reach

Thus,

any

with

any

action requjred

are

which

carry ljne

the

danger.

IEC

shorted

with

all instruments

and,

front

A visible

recommendation

and

and measurement

addition

instruments.

of the

at various

The lF

with

to

slide-in

and

transmitted

for

the

connection

and RF

couplers for

50 ohm input

of operation

gear.

VF

the above

units
Visual

deviations

instrument panel,

also

contain

displays

video

points.

Thus.

has additionally

of video

power

stages are

the

connection

impedance.

is

This rack

can accommodate

oscjlloscope,

from normal

and audio

conditions

operation.

transmitter

and

centre. When

press

by

are arranged

whatsoever.

that

doors

can be

and

sljders. whjch

conductors.

voltage

where

can be

key

buttons

caused

in

such

or voltages

necessary,

opened,

interlock

215-1.

for

servicing,

grounded.

of operating

for

necessary

voitages

the front

where necessary

and

sjgnal lamps

functionjng

sionals can

for

example

decoupled

possible

the video

frequency

provided

lF

of

and RF

on a

separate

75

test

such

Nyquist-demodulator,

makes

A remote

sends

the

on the

by

a

switch

are

by

as_

example,

for

con_

and

in_

of

ohm

test

test

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Prestage

vrsion/sound

4. Mode

Driver

vision/sound,

The

driver

vision/sound

and

sound

signals
tron required
power

amplifiers.

driver

stage

vision

driver

stage

linear

Semiconduclor

The

modular

in the

a cassette

mand

multlple

A

small front

The

v deo.

measuflng points

the front

ment with
operating

lhe

outout

tion.

The

vision

measuring

switches.
video

The linear
on

sirnilar lines

common

Dtivet
The

video

plifier

equivalent

to-peak

switched

cont ol ano

able.

Between

passive

is a

ceiver delay
bypassed.
video

signal

mediate

located

6

sound

amplifier

units

form

of

system

and

signaling

plugs.

panel

audio,

panels.

a rneasunng point

values.

frlters

and
values

These

signal.

amplifiers

sllde-in

stage

vision

signal is

and

a delay

inputs

and

a level

off and

measunng purposes

all-pass

errors.

The intermediate

n the

frequency

in

a thermostat

of

operation

BTV (cabinet

supplies

power

at the

to dlrectly

vision/sound

drive the transmitteis

The

dr ver

prestage

of the vision/sound

plug-ln

cassettes.

with associated power

lines

are made

provided

ts

and

intermediate

are

brought

The front

The

ano

sound

for

monitors

and

unit.

fed

equalizer. The

for

a

circuit for

the

vision

panel

space

tne video

branches

the

output

also

for vision

are

located

to the vision

a nominal

controjler.

amplifier

network

black level

This receiver

frequency

vision

modulator.

produced

is

of the vision

V)

completely

levels

and with

stages

can

section

which

are

vra

flexible

beneath

each row

frequency

out

to readily

also

contains
selector
behind

a white

for

switch for

these

lrequencV

have

monitors

power

and

check

the

and

sound

with

input

a

power

the

modulator

vision

amplifier

voltage

level

blankinq.

.neasJ.ing

and the

pre-equalization

delay

equalization

ls

The unmodulated

quartz

by a

modulator

processed

pre_correc-

the

vision/sound

be subdivided

are

grouped

suppltes.

constructed

tooether

The

cables with

of slide-ins.

outputs

available

a control instru-

control of the

panels

front

recerver

sync

that

contain

pulses

pre_correc_

derivate
threshold

are constructed

supply

via

a vision

has two

of 1 Voit

clipper that

For level

oritpul rs

vision

modulator

of the re_

can be

moduJaled

controlled

with

unit. The modu_

vision

final

into:

com-

and

points

contains

in the

in a

am_

peak_

can be

avair-

there

the

inter_

generator

lated lF
filter

exchanged if
required.

the
further
delay (v
ond

signal

housed in

group

delay

sion/sound

delay equalzer

signal now
a high

degree

(rise

mitter
The resulting
where

it is converted

frequency.

in

vides

sufficient

the

oscillator frequency

The lollowing
plete

frequency

on

amplifier
frequency.

Driver

The
duces

For the

quency

via a

stage saund

driver stage

lhe

purpose
modulated

the frequency
mainlained

disturbances

pauses

during
fringes

at the receiver.

synchronization

Linear

amplifier

The

transistor

nals

each to

Each linear

Frcquency preparation

The

auxiliary lrequency

originates

controlled in

oscillator. The lrequency

in a

perature-stable
A

special

split the

Precision

special
cassette

distributor

VHF

offset

additional

system.

passes

then

an individual

transmission

The next

delay

delay variat

equalzer

diplexe0.

passes

is regulated

through

of llnealzation

and

signal

phase)

now

time

The frequency

suppression

3/3 watt

range.

narrow-band

sound

I'eoJelcy

rrooutdted

of frequency

via a

difference

equal

to the

picture

of the

in

transmission

passes

linear

amplifiers

20 watts

amplifier

self

phase

a

required

is housed

excited VHF

locked

by

a thermostat

amplifier (RF

signal into

of the

oscillator

equipment

through

cassette.

according

equalizer in

in

on

the

vestigial

s available

The

to

pre-corrector

the lF

of the non-linearities

especia

passes

to lhe trcquency

to the required

converter

of undesired

and the

stages

The

contains

phase

between

line frequency

lf

the

automatically

needed

determining

auxiliary

are

broadband

RF

signal is

filter

centred

the

sound inter.nediate

stabilization

comparator

vision

by

an unmodulated

can

cause

pulses

sync

raise

to

drive the

n a

for frequency
oscillator

loop

by

bulfer amptifie0

the vision

and

circuit

that

can be housed

the vestigial

This

unit

can

to a different

the

for

equalizing

output voltage

a constant

path

signal

sideband

amplitude.

that

y

channel

contains

in the

product

frequency.

power

transmission

or

a filter

over the

then fed

on the

operating

sound modulator

this lF

in

such a

and

sound

(15

625 Hz).

sound

no moving

should

to

the vision

the vision

ide

s

ln

whose fiequency

be lost.

and

power

module.

conversion

the frequency

eiements

sound

is made

are kept

sides.

possible

in the

sideband

easily be

standard

equalizes

fitter.

A

the transmitter

from

the

sec-

The

provides

in the

trans-

ampljfier.

converter

pro_

that

frequencies.

com_

to the linear

that oro_

{requency.

signal is

fre_

way that

carriers is

ln this

way

carrier

lvloi16

lF

carrier.

sound

sig-

ampliflers.

is

quartz

of a

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ated

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driver

power

are

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cabinet

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the unit

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frequency

control

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pressure
switch

range.

grid

cavity

being monitored

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system.

power

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heater

voltage.

voltages

torized
with

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rectifier

bridge

that when
rises

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operating

the

protective

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amplifier

are
and

ln

driver there

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for

series regulators.

a folding

power

voltage

elements

circuitry.

the supply

smoothly

excess

on the magnetic

DC transducer

spark

equipment

important

and

monitored

outlet to the

order to monitor

panel

and

'with

stage

supply

with fault

monitoring

slide-in

consists

and RF measuring

memory

units

switches

of driver

on sliding frames.

driver

stage

to be

or the

combining

provision

is

no

is withdrawn

driver

circuitry

is

cooled

circuit

supplies

control

control

amplfier

The YL

cavity is

can be tuned

1057 tetrode

by forced

by a rnembrane

subject to

are separated

grid.

screen

and scieen

An

characteristic protects

supplying

rectifier

network.

lor

wth'avalanche

Special

up to

plate

of

gap

voltages

the RF lorward

and indicated.

is

a measu!.ing

is

the desired

current is

and in

and

cavity is

the

control

measures
switched

amplifier

parallel

currents in

displayed.

directional

of transmiftet

there is

and

the

interlocks

amplilier

equipment.

This

wheeled

for

air

into

unit

cabinet

the

operation

is

convection,

the IEC

into

individual

grid

grids

are

excess

the

plate

current

not

voltage
characleristic,'
have

on the

value

without

reglstered

principle.

with the

the

and reflected

The

air temperature

power

coming from

coupler

slide-in

mode

either

cassette unit

for

the individual

LVj

with assocF

All

of construction

the driver

as

circumstances

structural

of the

over

the entire band lll

operated in

type

grounded

the

differential

air-pressure

safety lock

units for

plale

and

controlled

voltages.

by transis_

protectjon

only the tetrode

comprises

in three-plate

been

taken

to ensure

filtered

output voltage

overshoot.

by a DC

ln

series with

tetrode

tube vision

power

at its

transducer

there is a

driver

at the inlet

the vision

equipped with

amplifier

The

circuit

but

output

probes

diode

for indicating

directional coupler is

entrance to the vision

The instruments

in

cated
forward

A free

control

and reflected

measuring

driver amplifier

equal forward

Control

The

cassette

panel

control

unil and is located
driver cabinet. lt
locking

devices

ampliliers
cation

ol operating

panel

P2" in the

and timing elements

tect

the tubes and

bances

Dynamic

FIF reflection

cause a
such

as failure

interlocking

or to

transmission.

A

disturbances,

permanent

disturbances

lmmediate

an

storage unit

disturbances in

power

supplies. ln

circuitry

ensures that

a failure are

The

status

merical illuminated

as

storage

for

connecting

BCD

coded digits

Apart

from the

panel

contains

integrated

FZ

analog
Preference

100

(Siemens)

to djgital

for

panel

point

LV1

and reverse

V3

panel

unit is

contains the

for the

of a

single transmitter

automatic

other

or excess

occur within

power

of

process

with 49 non-volatile

the

order to facilitate

stored.

of the memory

display.

elements. This

printer

a

pertinent

signal

only semiconductor

circuits

has

of the low

are

converters.

been

foMard

located

indicating

by means

driver.

E2

the

of

powers

provided

is

coupling

constructed

in

behind the

the vision

vision/sound

are

of a directional

"frame

switching,

driver and

conditions

ensure a reliable

interruption

in the

changeover

components

such

as switching

plate

current monitoring

of the

20 s.

supply voltage

if they

permanent

driver stages

occur

interruption

only disturbances

is indicated

polarized

Four

measure

or a remote

to a fault.

memory

relays

speed nojse-immune

used

and

operationat

given

to

units

and reflected

circulator at

power

driver

final

monitored

at

coefficients.

jn

final

and

also devices for

supervisory

by limit indicators.

the output

the form

V1"

monitoring

of

coupler with

of a

of the vision/sound

stages of the tetrode

,central

p.

unit

Logic

operating state

in the

event of

off the transmitter

power

devices, will

supplies if three

Static disturbances

lead

to an interruption

during the start-up

if

they occur during

fault memories

and fjnal

stages

troubte-shooting,

y

direc

by a

also

control unit

and

responsible

two-digit

per

relays

offers floating

which

counters,

circuits. For logic

amplifiers

that have

already

power.

This

the

are lo-

stage. The

the

vision

slide-in

and inter-

the indi-

control

circuits

pro-

and

djstur-

such

of the

procedure

indicates

and in their

logic

LED nu-

digit serve

contacts

outputs

the

control

operation

logic

series

for the

been

for

by

t

t

proved

in large-scale arrangements

mitting

SyStems.

The

circuits are designed

possible

Amplifier

Th s

wheeled out with vision/sound amplifier E3

cavities vision

immunity to

stage vision/sound, BTE

cabinet conta ns the sliding assembly unit that can be

amplif er

in

order to achieve the maximum

and

static

dynamic disturbances.

LV2'

as 20 kW

sound amp ifier LV3 as 2 kW f nal

tains

the associated

the RF measuring

key-operated

power

supplies and monitoring equipment.

and monltoring equipment together with the

IEC interlock with

the

the earthing circuit breaker. lt is not

sion/sound amplifler E1 outslde the

At the top

panel

and reflected

of

the

cabinet

there is the

E2 with the limit indicators for monitoring the torward

power

of driver stage D" and

amplifier E3 .

The 20

kW vis on

FS 2026

vision

the
operated

All

cavity circuits

CL whereas both the 2 kW

driver stage use a YL 1057 tetrode. All tetrodes are

in

power

grounded

are tunable

amplrier

control

employs a

grid

circuitry.

over the entire band lll.

I

ln

the conductor lines to the FIF

there are circulators

pling

to the vision

The

cavities are air

monitored

by a membrane air

present

driver amplifier and the

cooled.

inputs

in

order to

The

differential air

pressure

such as electronlc

(cabinet

stage sound.

visible

provided

cabinet.

detachable

E)

consisting

final

stage

separation

to operate

vision

lt also con-

instrument

vision/sound

tekode type

power

sound

the

of

provide

sound driver

amplifier and

amplifiers

cavity

one-way cou-

pressure

switch.

trans-

of the

point

the vi-

stage.

is

and

on

Directional couplers

are mounted behind

provide

free

measuring

with equal attenuation in both directions

the vision and sound

points.

power

amplifiers

to

Satety devices

Each transmitter has its own satety system in accordance with
IEC recommendation 215-1 . This
locking of the

firmly

either

key-locking cover
The key

parts

carrying high tension. These

bolted or, when access is

panels.

locking

part

includes:

the automatic changeover

switch tor driver stage D and vision/sound final stages

E), and

the anode

cavity circuits of

LV3. Each transmitter requires
The key is

by the mains circuit breaker. Then the

to unlock the
vision/sound final

grounding

grounded"
cavity of

These can now be
as routine ma ntenance

released

only

grounding

stages.

switch into the

releases

the

driver

stage
opened

aiter the mains has been switched ofl

switch in the driver stages

Then rotation

position

the mechanical lock on the anode circuit

or of

or

Measurement and control

provided

Each unit
monitoring most ot the important voltages,
levels.

is

with measurement

provides

both mains circuit breakers

unit (cabinet P), the

only one

marked filter circuit

the vision/sound

wrthoul

rep

danger

acement of CRTS

equipment

tor

required,

power

ampllfiers LV1 to

key.

key

same

of the appropriate

for

and test

currents and

mechanical

parts

are

provided

grounding

be used

can

in the

or

final

stage.

purposes

such

points

with

in

(cabinet

tor

power

The

anode cavity resonators are also included in the

safety switch system.

The vision/sound final stage following the key-operated

circuit breaker
transmitter. The

isolated

The mains

screen

is

the mains connection

corresponding

by automatic switches in the automatic controller.

power

supplies for heater voltage, control

grid

voltage

and

plate

and sound units. The control

electronically stabilized

by transistorized. short-circuit

mains

voltage

and

point

distribution

are separated

screen

grid

voltage regulators.

The high voltage rectifiers for

phase

bridge

t

been taken lo ensure that when the supply

filtered
Measuring

circuitry

voltage rises aperiodically to its desired

output

equipment

using avalanche type diodes. Care

All important voltages and

the

currents

plate

voltages are

js

in the tube amplifiers

vision/sound and the RF forward and reflected
outputs are monitored and

of the

cavities

power.

output

voltages

The voltage

rectified

are

displayed

directional couplers are used to couple

out.

proportional

in the control section of the

voltage is used to indicate the

limit

indicators at the top of the final stage cabinet.

proportional

in

tion

nector
indicators

to

reflected

the

the rectifier

of the directional coupler. l\,4eters equipped

also

probe

indicate

indicated. The

exit

separately. For monitoring

output

is

power

prestage.

power

subject

power

of the

to the

output

power

screwed onto the reverse

reflected

the

and sound stages.

The

transmitter is cut otf automatically

power

if

cut-out

set from the front,
marked

decreases or

thresholds for forward

points.

if

the

be directly read on the

can

reflected

and

via

power

reflected

the

IEC

mains

individual

for the

points

are

and

into vision

voltages are

switched

air temperatures

power

protected.

in

three-

has

on the

value.

at their

the RF

RF

is

evaluated

The

and

rectified

at the meters with

The voltage

peak

to

rectifica-

flow con-

with limit

final vision

limit instruments

is too high. The

power,

easily to be

power

scales at

Amplifier

staqe

:iF

vision/sound

FE

2012 kW

I

plexer

D

vision/sound

t-+ '

\b,

-!;

'i:

f

The RF

instrument

combining
There is

w th

meter
age, screen

sw tch-off rs actuated

panel

A test
the DC transducer
excess
with

supplied
comprises

Cooling

Forced

the heat

amplifiers
in the

A

a r f lter

heated

Su tabie

that the
to hinder

accumulation

conditioning

of the transmitter

Combining

This

v s

above the vision/sound

e

10

forward

a separate

each

can indicate

and reflected

panels

of the vision/sound

un t.

control

CFT According to

grid

grid

voltage,

current

by a dc measuring

also contains

current

p

ate

great precision

with the

the

counter

can be fed via

n

order to determine

current switch. This

using the

standard

the so-called

ol transmitter

air

caused

cabinet

pressure

to the

a r

choices

cabinets

cooling

and for the

out ol the

any

circuits are necessary

plate

by the

cooling

of the final

and

extraction blower

equtpment

c osed

of the inlet
are under

penetratton

of dust in the

unil is

chosen to

locatlon.

unit vision/sound,

cabinet unit

contains

on/sound diplexer w th the FIF

diplexer

g.

for measuring

equ

pment.

powers

panel

with multimeter

the selector

screen

plate

or

current. The

for

ind

a socket into

threshold

potentiometer

accessories.

test set

1 and a

power

of other thermally

stages.

supplies fresh

parts

lo be

coo ng

system

and outlet

slght

excess

unf ltered

of

cab nets.

particular

suit

KE

instrument

changeover

is

available for

are indicated

final

stage and

switch

grid

vollage.

on the

of

associated

setting.

plate

excess current

probe

The

control

cat ng excess

currenl

the test wind ng

the

threshold of the

can

be determ

arrangement

The arrangement

multizet .

in

order to remove

dissipation in

coo ed

air flow rates ouarantee

pressure

air that

The

size of the air

(cabinet

panel

the tetrode

loaded

air

through an

and extracts the

in"order

could cause

requirements

K)

K1 and the

pane

. Space

general

the

the

parts

use.

volt-

of

ned

power

The

is

delivered v a the vis

antenna

The vs

coupler and can
230 N/Hz). For

coo ng is

neg ig
matched

the

diplexer are thus approximately

reject

An improvement

channel frequencres

match

of the relect on

Superv

tional
vision/sound

mitter

from

mismatch
by the limit indtcator

lvloreover.
attenuation coefficients
directional
demodulator.

The FF
enables s\\i

The following

a)

Output of

s the normal

b)

Output of vision/sound

delivered

outlet without

on/sound

diplexer s

be tuned

throughputs

provided

Detuning

bly sma l. This

sound rejection filters.

ranges.

on

n

bandpass

is ach

inductance

ng

bands.

sion of transm

coupler with rect

dipiexer that

to the antenna.

vision/sound

the

ng a

set value,

on the reflected

there

are two directional

coupler for the

switchover

ilch

panel

ng

operat

swrtchtng

v

sion/sound

setup

by the tinal

onlsound
any

performance

n

order to increase

tter

fier

lf the reflected power

diplexer

connected

operat

a bypass circuit:
ln the case

the motor driven

un

t and to switch

dire(ty inlo

of double

RF

the

lha RF

switch in the

swirching

stages for vision
dip

interaction.

built in the iorrn

over the

in

excess of 20/2 kW iorced

due to

to

exer

the common

of a coaxial

entire band lll

temperature

produced

is

by a

The nput impedance

constant in

characteristic in

eved by filters

operation is facilitated

probes

indicates

the RF

connection

above

ons of the

at the RF

the matching

to the

antenna

carr er interlock

power

couplers with matched

to test

of a televtsion instrument

the vision/sound

otrlput

ons are

possible:

diplexer (WA)

diplexer

transmitters.

to dummy toad (KA)

it is

automatic

output of the vision/sound

device.

the

the vision

with adjustable

the

side steepness

by

output

on the RF line

exceeds due to

meter

points

as well as

the

of

to antenna

possible

changeover

and

sound

bridge

(j

74 to

a t

changes s

pair

of

values

respective

a direc

of the

of the trans-

is released

diplexer

transmitter.

(A)

which

or to

to

bypass

diplexer

of

t

one

Automalic
(cabinet

The
automatically
event

rnitter

which

reserve

ability' in

While

lhe
lo the

an interruptlon

is
immediately

of
ously

to

t

The
reserve

can

Cabinet

case

are
are

Lamp
with

double

Central

with
changeover,
logic

Cross

with the
remote

t

RF

w

''b'

Mains

wlth
and

The
assemblles

the individual

transmittea',

''automatic

lf

Cent'ar

become

CO'nrnandb

the

"remote.

The

over from

if

if

transmitler

The

available

the

follow

a)

Output

antenna (A).

b)

Output

antenna (A)

P)

operalion

failure

of

there

are

swilching. thereby

the whole

the operatlng

motor

dummy

automatically

quality

and with

operating

the

dummy load

two

transmitters

transmitter

be remotely

P includes

of a

double instailation,

common
as follows:

panel

the bank

unit

control

the

switch

for

the RF

connection

central

connections

two-way

th motor

to the

antenna

distribution

the

key-locked

the

third

cassette

the

control

then lhe

possible

appropriate

automatic

the

any

command

prescribed

the

BF

circuits in

ng

arrangements:

vision

of

of sound

changeover

of unmanned

switches

interruption.

of

are two

operated

driven

according

transrnitter

switch. the reserve

load

and can thus

occurs in

switched

takes

over the

the normal

transrnitter

and

is entirely

controlled.

the

to both

Pl

lamps

of

and

of the automatic

panel

panel

and

the transmitter

switch.

unit

connections

for

switch

drive for

switching the

and the

unit

circuit

mains

unit

central

which

have

transmitters,

switching

changeover".

panel

is switched

conlror

only from

from

tne rpmole

operations

changeover

operating

for

a

output

is not

achieved.

the vision/sound

transmrller (B)

transmitter (T)

unit

over to reserye

to

to

passive

with

stations requires

ln the

complete identical

to the

producing

installation.

is

connecled

be

lested

the

operating

over to

can be

are identical.

central

transmitters.

for

the reserve

prograrn

power.

passes

lhen

checked.

arbitrary.

changeover

those

The

indicating

changeover

The

parts

p2

for local

and remote

preselector

p3

for transmitter

commands

P4

and

outputs

dummy load.

p5

breakers

.

control

priority

in

of operating

such

for

panel,.contains

over the

as.,preselection

from

local

ilstructions

'centrai

the

equrpmenl

mode

switch

untt'

causes

transmiüer

particular

power

to the

switch

of either

diplexer

dummy load (KA)

dummy toad (KA)

load.

SAW

equipment that

or spare sections in

case

of a double trans-

transm

principle

a h

transmitler

tters a,

pass

of

gh

degree of,'avail-

to the

antenna via

is connected

and serv ced.

transmitter

the service

transmitter

without

the

any

The

through

cho

The

are

various

operating

communication.

deterioration

outpul of the

the RF

ce of operating

entire transm tter

unit, where,

combined which

SUbassemblies

state

unit.

operation, automatic

with

the control

control

cables

of transmitter

transmitters

a, and.

those

switching

devices in

of operating

transmittef,.

and

ooeration,,to

Orthp whore

control

a.rive

is in

an automalic

reserve

state is not

the vision

installalon

oanel,,. The

here

also if

position

the

transmittei

obeyed

or sound

enable

or to

or to

and b,

ve

When

which

previ­switch

and

in the

of the

and

.'a,

or

sub_

change_

or

There are

a) Jf the

b)

the

The

a

closed.

Apart lrom

the

lunctiona

low

The

ally a

transmitters, from
are branched

The

especialy required
dummy load
an air-cooled

The mains

circurt breakers

for

phase

b

two rnain

power

output

because
below
power

carrier lock
transmission

reserve
ln the

changeover

transmitter

possible

status

block of indicator

'central

speed noise-immune

of. say,

the threshold

supply is

transmitter

case

disruption

of the

the

control

units. The logic

'cross

connection

part

of the

still n

is imited

of lnterruption

of transmitters

is runn

double transmitter

power

central control

the RF

and

sent to

cabinet has

the motor

monltor

with

dummy

power

of an

protects

spare

calometric

distributor

for

transmitters

,.\

,.t;]

ix'

Automatic

with incorporated

changeover

groups

of faiiure

of the linal

aging

of the

value.

switched

up to the

operation. ln

to two

ls

not

on standby.

ng in

standby

of transmission

larnps.

even when the

supplies

panel"

has

functions

integrated

unit' is

switches

the

space to

by

the

customer.

power

load.

contains

air-cooled

the motor

unit

dummy

oad

types:

gradually

stage

CRT until the

then ftrst the reserve

normal value

this way

seconds.

power

to the

is instantaneous.

state. the

is 7

power

the interruption

even when the

supply

maximum

s.

switching is indicated

cabinet

with rectifiers

and

only semiconductor

employ Siemens

circuits.

a separate

panel.

cassette support.

be

Here

and frorn

fitted

with equipment

module

the lines

the remote

e.g. a water-cooled

measuring

a" and

dummy

if

one mains

not

load. An

equipment

only the interlocked

b but also

associated

phase

decreases

drops

transmitter

with

the

the

lf the reserve

by

doors are

smoothinq.

circuits as

FZ

1OO

but function-

from

both

control

or

a socket

should fail.

of

lnstallation

advice

lnstallation

Together

such
vision/sound,

diplexer

tribution
perlormed

built according

This enables

in
of the

The

access

using

Since
imperative.

in a
The transmitter

undefloor

either

The cabinets

parts

None ot
cabinets.

local

prestages

as

vision/sound,

units

to meet any

order

transmitter

transmitter

to the

a switch

the units

vehicle

from

allowing

architectural

with associated

as separate

This

space,

below or

the external

These require

in cabinets

vision/sound,

instrument

RF changeover

and the

one

rear. The

as a

can be

dummy

to the so-called

to modily

special

room.

free standing

is

room high

are on casters,

is valuable

mobile station.

can be

required; cooling

as

from above.

disassembled,

transport

cooling

conditions

power

supplies

driver

panels,

lamp

and

load are

subassemblies.

modular

the normal

requirements

in the

paneis

rear

voltage

when

mounted

in containers

mounting

can

spanner.

access

the transmitter

flat

on

devices

arrangements

into account

all transmitter

stages,

control

panel,

the

housed

i.e the

packaging

mode of

due

transmitter

be easily

trom the

ground

air can be

the size ot

by air

or

is included

stages,

amplifiers

and

panels,

dis-

mains

in the cabinets,

system

nature

with

not

take

is

an

the

transmitter

installation

to the

room

removed

rear is

is mounted

above

or

admitted

the separate

freight

in the
that

Vision/soundPrestage

1
2 Vision/sound
3 Combining
4 Circuit
5
6 Radial

7
8
I

10 Air shaft
11 Air

breaker

filter

Air

blower

Axial blower

Regulator
Dummy

load

mixing

circuit

final stage

unit

(inlet

(exhaust

t

air)

ai4

12

Example

of cooling

from above

t_

transmitter

0

Example

ol cooling lrom

below transmitter

l\

tl ::

.'

Example

of cooling via

underfloor

space

13

Electrical data

5.

General

output

ratio vision

of operation

power

ot single

to sound

RF
Power
Frequency range

Transmitter tuning range

Video frequency modulation bandwidth of

lvlode

Color systems

Frequency deviation at 100%

lvlaximum f requency deviation

AF modulation bandwidth

for

GCIR

and double transmitter

modulation

Cooling

Cooling agent
Allowable temperature range

air at

period

room

entrance

perlormance

relative humidity

room

transmitter

Cooling

for

specified

Maximum allowable

in operating

Warm-up

in

to transmitter

vision

standard

channel

B

kw

20/2

10: 1 or

1741o
0 to 5 l\.4H2
Vision:

Sound:

NTSC.

a

>

30 to 15 000

Air

+5 to +45'C

+

96n

<

20: 1

230 l\,4H2

A5C

F3

PAL, SECAI\i]

kHz

50
70 kHz

10 to +45'C

rn3x.

21

min

30

(channels

(negative)

Hz

+26'C

5

to 12)

RF

output

Nominal output

Vision transmitter

transmitter

Sound

Mains supplyl)

Power consumption including blower

power

power

(sync. peak

(carrier

and

power)

power

power)

a\ 20/2 kW

nominal

white level

power

b\ 2o/2 kw

nominal

black

c)

Operating

2012 kW nominal

Reserve
nominal
black level

Phase loading
Fuses

power

level

transmitter with

üansmitter with

power

(NH

fuse)

power

on dummy

to antenna

2012 kW

load;

consumption

Single transmitter

>20

kw

>2.0

kw

3x3BO/220

V

t3%

15%

H2

50

approx. 32 kVA

cosq>093

approx. 45 kVA

cosq>093

max.

3x80

65

A

A

Double transmitter

>20

kw

>2.0 kw

3><380/220

V

i.3"k

50Hzt5%

approx.

(|

cos

approx. 45.5 kVA

ct

cos

approx.

q

cos

max. 130

2x(3x80

or 3x125

>

>

>

32,5

0.93

0.93

90.5

0.93

A

A)

A

kVA

kVA

Reserve
running
standby

transmitter

'L","

L

Blower

Air inlet
Air

outlet

Mains voltage regulalor

Heat dissipation

Operating and reseTVe transmitter unit 2012

Nominal

power

switched on:

a) into transmitter room
b) into cooling room

1)

Larger mains

14

vollage fluctuations necessitate a mains

kW

voltage regulalor

7.5

kW

0.75 kw

3x20 kVA

<

kW

2.4

1.0 kw

=

io be connecled

in series

kW

2x 7.5

kW

2x 7.5

(3x20

2x

or 3x40 kVA

<

4.8

<

2.0 kw

kVA)

kW

. External drive
f

^

J

'

,

Vision

Output

Termination

The
is

l\y'ax.

of the load impedance >

l\y'ode

Amplitude
with

Method

Frequency

Setting

[,4ax.

generated

lntermediate

lnput for
lnput

External

Switchover

Number
Video

Return

up to 6 l\ilHz >

Video

Cross-talk rejectjon

VF

Preservation
l\4odulation

White levet

White tevel

VF

lnherent

a)

b) with receiver

Delay

signal

a)

without

transmitter

power

measured

designed

at

output of the vision/sound

output

allowable return

of operation

partial

of modulation

the transmitter

of

for unbalanced

negative modutation

suppression

accuracy

deviation

jn

transmitter

frequency

channel and lF

voltage

for channel

channel modulation

"local/external"

inputs

of

frequency

loss

of VF input

input

voltage for

inputs for

frequencies

of black level

failure
clipper

ctipping

group

delay frequency

delay

without receiver

without

without

without receiver

sound

sound trap in

difference

(referred

sound

pre-correction

between luminance

connection with

loss

of the lower

of carrier frequency

over

3 months i

and lF

input

for frequencies

color

composite signal

between

pre-correction

trap in

both

up to

6 MHz

response

demodulator
demodulator

to

trap in

- putses)

20 T

pre-correction

demodulator

diplexer

sideband

and color

b) with receiver pre-correction

with sound

lntercarrier

and

unmodulated

Linearity

Linearitv m

for frequencies

from

Linearity
modulation

trap in

signal-to-noise

sound

!!lL

:

'

Sm:r

from

10 to 75%

for

color

range

demodulator

ratio (up

transmitter)

0.5 to 4 MHz

carrier frequency
from 10

to 87.S%

to

I OO kHz modulation

in the modulation

4.43

MHz in the

range

- 20 kW

O

SO

18 dB

AsC

lntermediate

sideband filter

delay equalization for
lF amplitude

better than t

150 Hz

39.9 NIHZ

e unbatanced

50

:

Vrnrs

|t',

ta

automatic switchover
precision

(to

2

be switched

75 O

34 dB

Vpp

=

>

56 dB
black
arbitrarily long

resumed

be

can
can be adjusted

within r 35 ns

within t 50 ns referred

curve with 400 ns

go/"

<

< 4"k

>

38 dB relative

>

0.9

>

0.9

frequency

and

0.1

to 1 V

+ l,l

otfset mode

positive

1 V

level

blanking

automatically

switched

with separate

phase

50 Hz

i.e.

from

to 87.716666

over locally

r

without

duration allowable.

otf

at 4.8 l\rHz

lo 30 kHz

modutation,

group

delay

transmitter

correction.

71.383333

of the regulating

of

operataon

3 dB

after resumption

to

distortion and

NiHz

N/Hz

or externa

adjustable

deterioration

Normal

ARD standard

deviation

lF vestiqial

equalization,

voltage

y)

of sync signal

state

modulation.

of

at

'15

Deviation

peak

from

Aud

o

square wave

the

of

differential

voltage

10 to 87.5% at 4.43 N/Hz

at transmitter

frequency

in

transrent

the modulation

pulse

phase
output

(tilt)

when modu

range

run

of the

in the modulation

ating by 50

10 to 75';

oi

range

Hz

the sync

<

<

a

!

3'

2"k

Al\il

signal{o-noise ratio relative to black-white step

Hum (up

a)

b) Noise

Spurious emission

to 1 kHz)

(100

kHz to

[,4H2, unweighted)

5

a) Harmonics

b) Spurious

outside

(inherent

the vision

combination signals

channel)

Sound transmitter

FIF

measured at

Termination

The output

unbalanced
Max. allowable return

load impedance

lvlode

Frequency

Method

Frequency

Setting accuracy

Centre

up to

lntermediate

a) for sound
b) for sound

External
Number

AF input

Adjustment range
Gradation
AF frequency
Distortion factor
lntermodulation

power

output

outpul of vision/sound

of the transmitter is designed for

termination with

of operation

modulation

of modulation

frequency

a

kHz

50

frequency

channel 1

channel

drive

AF inputs 1

of

input

of

response between

between

diplexer

loss of the

deviation at modulation

devaation r 150 Hz + K^r lines

2 33.158 MHz

of AF input

voltage

divider continuous

30 and 15,000

40

and 15,000 Hz

dz

dt

Noise

modulation

Unweighted FM voltage

lmq6

with

Weighted FNi voltage

with tmod

Unweighted

500 Hz) for 40 to 15,000 Hz

=

:

Hz)

500

AM

voltage

(referred

(referred

(referred

to 30 kHz

to

kHz

30

to 100% AM)

asynchronous

Spurious

emission

Harmonics

Subsidiary waves
signals

16

outside

(inherent

the

operating channel)

combination

10/75%

Hz within

deviation

deviation

>
>

<

<

>

50 A

>

F3

lntermediate frequency modulation (F3)

with line frequency

better than i 50 Hz

(K

33.4 N.4Hz

as in vision transmitter

lnput for

>

3-pole socket similar
with lock

-4

<

s

=

>

>
>

<

=

(peak rating)

43 dB

(rms

56 dB

rating)

lmw

1

t,W

2 kW

18 dB

:

352 for 33.4 Ny'Hz sound lF)

(Standard

second

O balanced

2000

to +8 dBm

1

1 dB

1

referred to

7o

0.6%

1o/o

60 dB

63 dB

50 dB

1 mW

1 pW

G)

sound channel

(600

to DIN 41

for 150

relerred

kHz deviation

to 500

kHz deviation

50

prepared

EJ on request)

524

Hz

U

synchronized

t-

b

Diplexer

Throughput

Vision

transmitter

Vision

transmitter

Sound

transmitter

Frequency

vision/sound

Cooling

Forced

lnput

Vision
VSWR

Sound input

VSWR

Output

The
for
Admissible

Decoupling

Vision

Vision

Sound

vtston
at vision

Attenuation

Sound

Vision

air cooling

impedance

input

in

in

impedance

output

unbalanced

input

carrier

carrier hequency

transmitter

transmitter

transmitter

vision/sound

peak

power

rms

range

diprexer

pass

pass

of the

load

reiection

to sound input

frequency

carrier frequency

tuning

with

output terminaled

band

band

diptexer is

termination

VSWR

input

to absorber

input

jnput

to

power

range

up to

Sd e

dimensioned

with

at

lv

ls

lv >

to

antenna

antenna

at ts

at fv

max.22.5

max. 13.5

max. 2.5

fi4

e unbalanced

50

<

1..1

50 e unbatanced

<

1.06

(2

50

<

1.4

>

25

- 40

20

<

0.7 dB

0.2 dB

=

kW
kW
kW

b 2go MHz (channers

(4

>

ar

26

(4

>

ar

(4

ar >

15.5 dB)

dB
dB

dB

30

s to 12)

dB)

dB)

Measuring points

RF

measuring

Directional

I

forward

RF

and

output voltage

Output
Directivity

lF

measuring

(via

buffer

lF

output voltage

Output

VF

measuring point

Output voltage

Output

points

couplers

reflected

for

power

from

directionat

points

amptitier)

coupler loops

Output LV1

b

=

:

VF

I V

(20

LV3 (2

RF

switch

only

1

V

socket

0.3 1

amplifier

Output LV2

Output
2x

output diplexer

(Output

to

dummy

yms
50 A

4.'1l9.5

>

34 dB

Output modulator

Output RSB filter

yms

b

O

50

Output

:

Vpp

75

e

picture)

kW

kW sound)

vision/sound

to antenna.

in

case ot double

or 1.8/5.6

0.1 V

socket

Output RF

transmitter)

request

on

switch

17

Sideband

d8

spectrum

I

8

-12

16

-20

I

-24

t

-3

4

Overall

Nyquist demodulator

gain

v

a

vision transmitter and

of

ol vision

1214

1)

transmitter

6 MHz

N
(MHz)

4.43

<

-1.25 -20

to 0.75

-1.25

4.75

-o.5

4.25
0 +0.5

+1.5

+4.5

+3 to

+5

+5 to +5.5

>

+5.5

Upper
limit

-30

+0.5

+o_5

+0.5
+0.5

relerence

+0.5
+0.5

+0.5

-20

Lower

(dB)

-4.0

-1

-0.5

-o.5

value

-1.0

-2.5

.0

dg

0

-10

-r0ö

1)

Gain of

switched-on sound trap

1 2

Transmitter wilh

Nyquist

o/t

100

50

20

0

receiver

demodulator

1

3 4

_

precorrection,

RF +

\

5 6MHz

I,e

measuring dernodulator

lF with

receiver standard

with

curve and

sound

lrap

frel

(MHz)

0to1.5

1.5

4

4.43

5

>

5.5

lrd

(MHz)

<

-1.65

-1.65

-1.35

-1

-0.5

+0.5

+1

+'1.4

+1.5
+1.6
+2.5
+3.5
+4.43

Tolerance a
(dB)

+1/-1

relerencevalue

+1/-1.5

+ 1/-2

.5

+'t /-1

+1/-24.5

-.30

Arel

Lower Upper
limit

0
n

0
0

15

0

4A

75

91 .5

95
relerence

95
95
80

63

ekt

2

0.8

0.8

8.5
25
52
85

101.5

105

value

105
105

95

71

Transient ot vision transmiüer

lrom 55% to 75% ol

-1000 -600 -200

18

peak

voltage and vice versa

0 200

and

Nyquist

demodulator

lor steps

Time t

(ns)

x75

1100

!200

t[400 to 1000]

1[400

to 1000]

Limit

ek\

-10

+11

!7

t
t

5

3lor

overhang

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