Sennheiser SER 1-3 User Manual download pdf (Page 95)

I7filku'gpoK transmitters

1012

A wide

dynamic range

through the

use of

"HiDyn"

compander circuitry.

Compact

model with

clip -on microphone

MKE 2012 (omnidirectional)

and

MKE 4012 (supercardioid).

Optional

selection

three

operating

modes:

Linear,

Limiter, HiDyn.

Compatible

with

existing systems.

This

1012

transmitter with

newly

developed

compander

circuitry for

reducing noise

levels is

further

development

of the familiar range

of portable

Mikroport

transmitters.

The housing from

1010

has

been used. The

exterior

distinguishing feature

is the

operating mode

selector

switch with 3

set-

tings:

"Linear"

No regulating

control,

deviation limited

only by

clipping.

"Limiter"

Deviation limited

by regulating

control.

"HiDyn"

Compander mode

and deviation limited

regula-

tory

control.

with all

compander processes

the

"HiDyn"

system

utilises linear pre-

emphasis in

the trans-

mitter.

Corresponding

de- emphasis

is used in

the

receiver.

Consequently

a "HiDyn " -compatible

receiver is

also necessary,

for

example EM 1026,

EM 1001

or EM 1003.

The

standard of noise

suppression

achieved

by the "HiDyn" process

astoundingly

good.

Whereas

without

"HiDyn"

under

otherwise

optimum

conditions a

signal to

noise ratio

of, for

example, 60 dB is

achieved, with

the "HiDyn"

system it is

possible

to achieve

value

of 72 dB

(CCIR 468,

peak valuation).

Where

the RF conditions

are less

than optimum

the gain

even

greater.

As the possibility

is not

to be

excluded

that the

1012

transmitter

may also

have

to operate

together with receivers

incapable

of coping with "HiDyn

the "HiDyn"

system

can

be switched

off by

the operating mode

switch

the

side of the housing.

The moulding

at the bottom

end

the

antenna is

used as a

switching tool.

the "Lim" position

the

1012

operates in

the

same

manner

as the

popular

1010

transmitter:

on exceeding

full

modulation

(rated

deviation) an

automatic level

limiter

comes

into

action.

In the

"Lin"

position

the automatic level

control is

switched off. The AF

signal is limited harshly

clipping 5 dB

above

full

modulation level.

The

1012

transmitter

is available in

the

following

versions:

1012

Mikroport transmitter, with

3 switchable wideband

transmission

frequencies

36.7/37.1/37.9

MHz and 10 mW

RF output.

1012

1012,

but

for

the West

German broadcasting

stations with

frequencies

between

32.55 and 38.05 MHz.

SK 1012 -1

1012,

but with 100

mW RF

output. The higher

output

reduces

the operating time

to approx. 30 % by

comparison with

the

1012.

This version is licensed

only for delivery

foreign

countries.

SK 1012 -1 R

1012.

but with 1C0

mW RF output.

Owing to the higher

output the operating

time

reduced

to about 30 % by comparison

with

the

1012.

This version is designed for

German broad-

casting

stations on frequencies

between 32.55

and 38.05 MHz.

SK 1012 -6

Narrow -band version

of the

1012. 1 frequency

the area of

30 to 45 MHz.

1012

-7

Narrow -band

version

as SK

1012

-6, but with 100 mW

RF output.

Technical

Data:

SK 1012

SK 1012-1

Carrier frequency

Max. frequency

separation

between

channel

and

channel 3

Frequency stability

temperatures

between + 10°

and +

40° C and deviation

% and -30 %

RF output to

dummy antenna

Radiated

power

Radiated

spurious and

harmonic

frequencies

Modulation

RF phase

position (RF input

voltage: frequency

deviation)

Rated

deviation

Peak

deviation

in operating

mode

linear

limiter

HiDyn

..........

Signal to noise ratio

(CCIR

468,

peak) relative

to rated

deviation,

input

sensitivity 10 mV

linear

limiter

HiDyn

Input

sensitivity

maximum

minimum

Input impedance

Input

socket wiring

connections

36.7/37.1

and 37.9 MHz

( switchable)

or 3 frequencies

between 30

and

MHz

1.5

MHz

better than

kHz

10mW

1 mW

1.5

MHz

better than

kHz

100mW

approx. 10 mW

s4nW

54nW

selective internally

by soldder

bridge

±40 kHz

±40

kHz

75 kHz

kHz

=60dB

?60dB

B70dB

± 75 kHz

kHz

60 dB

1 mV /±

kHz

deviation(typical)

200

/±

kHz deviation

(typical)

approx. 40 kG

approx.

40 k52

Pin 1 =

AF input, Pin

2 = earth (-

battery),

3 =

earth

battery), Pin

6, 7 (+

battery) must

connected

externally (remote

switching facility),

8 = screened

powering

voltage for

electret

capacitor microphones

Technical Data:

SK 1012

SK 1012-1

Range

of the sensitivity regulator

Control range

of limiting amplifier

Distortion factor throughout

modulation

range

Ntot (1000 Hz)

Modulation

display with mode

switch set to "TEST"

AF requency response

. . .

Roll -off

above 20 kHz

Preemphasis

Power

consumption

Power

supply

Operating time relative

battery

type

dB (typical)

LED, red

Hz to 20 kHz

dB -3

> 18

/Oct.

(active low pass)

µsec

approx. 15

9 V

battery

IEC

6 F 22

approx.

hours

with

Braunstein

(e. g.

Daimon No. 333)

approx. 5.5 hours. with

nickel

cadmium cell,

e. g. Varta Tr 7/8

approx. 32

hours

with

alkaline manganese

cell (e.

Mallory

1604)

Battery

status check with

operating

mode

switch

set to "TEST" . .

LED, green

Dimensions

in mm including

microphone

Weight

with

battery

and

microphone

FTZ

approval No

150x46 x24

226 g

M-68/80

dB (typical)

30 dB (typical)

LED,

red

Hz to 20 kHz

dB -3

> 18

/Oct.

(active low pass)

50 psec

approx.

9 V battery IEC 6

(Braunstein not

recommended

approx. 1.5 hours

approx. 6 hours

LED, green

150 x 46 x 24

226

M-68/80

1 2 ... 90 91 92 93 94 95 96 97 98 99 100 ... 147 148

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Sennheiser SER 1-3 User Manual Page 95

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