Sennheiser TU-3 User manual

Brand: Sennheiser

Model: TU-3

Category: Microphones

Type: User manual

This manual is also suitable for

MKH 816 TU-3

Sennheiser TU-3 is a directional studio microphone appreciated for its high directionality, low equivalent sound pressure level, ruggedness and resistance to unfavorable climatic conditions, high sensitivity, and all-metal construction. This microphone is a transistorized RF condenser microphone requiring DC voltage for operation, which is led through the conductors of the connecting cable (A-B powering according to the German standard DIN 45595). Thanks to the special technical solutions implemented in this device, the user can enjoy high operational reliability, very good feedback attenuation, and a high field open-circuit transmission factor.

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Frequenzgang

Frequency response

Courbe de frequence

Beschaltung / Speisung

Wiring / Powering

Cäblage/ Alimentation

Symmetrische Tonaderspeisung nach DIN 45595

Balanced A-ß powering according to DIN 45595

Alimentation symetrlque par conducteurs

de modulation selon DIN 45595

MKH 816 TU-3

50 100 200 500 1000

2000 5000 10000 20000Hz!

--ru_nni I

i 23 i

' I

I I I

I 1 I I

L_uLu : 1

- J

Sollfrequenzgang mit Toleranzsehema MKH 816TU-3

Standard response eurve wifh foleranees MKH 816TU"3

Courbe de reponse de eonsigne avee toleranee MKH 816TU-3

Jedem Mikrofon legen wir das Origlnal-Meßprotokoll bei, gemessen von

50 20000 Hz,

The ollglnal diagram ISIneluded wlth eaeh microphone, measured from

50 20000 Hz.

Chaque miere est livre avee I'origlnal du proees-verbal des mesures entre

50 et 20000 Hz.

Abb.1

Fig.1

Unsymmetrische Tonaderspeisung

Unbalanced A-B powering

Aliment~tion asymetrique par conducteurs de modulation

MKH 816 TU-3

Richtdiagramm

Directional pattern

Diagramme de directivite

:--

-rn__n:

I 2 I

I I

I 3 I

I I

Lu_Iuu ---J

od"/m/cc

60"

)900

. !

J' /;

- /~ / /

1200

./ 2000 Hz -

--- . 1500 4000 Hz --

8000 Hz -.-

16000 Hz --

Abb.2

Fig.2

Abb.

Fig.3

- -,

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DIRECTIONALSTUDIO

MICROPHONEMKH816TU-3

response. The source impedance 01the Senn heiser condenser

microphones with A-B powering is so low (approx. 8 Q at 1000 Hz)

that an amplilier input with an impedance 01at least 400 Q will be

suitable. This is usual in the majority 01cases. However, il the Input

impedance is smaller than 400 Q, a reslstor 01appropriate

value should be placed in se ries with the microphone so that it

"sees" aleast 400 Q. The voltage division caused by this series

resistor must 01course be consldered. The same method can be

used when a highter output impedance 01the microphone is

demanded. In this case again aseries resistor can be used to

provide correct matching.

Senn heiser condenser microphones produce relatively large output

voltages; these can be up to 1volt with maximum sound pressure

levels. This has the advantage that even with long cables induced

interference signals can be disregarded. Also the internat noise

produced by the microphone does not contribute to the total noise

level. The microphones are litted with high Irequency lilters, wh ich

ensure that no high Irequency signals Irom the microphone can

allect the external circuitry, and also that the microphone Itsell is

protected Irom high Irequency disturbance. It is, therelore, not

necessary, even under the most dillicult conditions, to take special

precautions such as double screening 01the cables or the provision

01high Irequency lilters.

Sennheiser condenser microphones are polarised according to

DIN standard, i. e. when apressure signal strikes the capsule Irom

the lront pin 2 01the XLR-connector goes positive with relerence

to pin 3.

Delivery: 1 microphone

General Description

The directional studio microphone MKH 816 T is a transistorized RF

condenser microphone. The DC voltage necessary lor operation IS

led through the conductors 01the connecting cable (A-B powering

according to the German standard DIN 45595).

Features:

. High directionality

. Low equivalent sound pressure level

. Rugged and extremely resistantto unlavourable climatic

conditions

. High sensitivity

. All metal housing with black linish

Principle of high frequency circuit

The capsule 01an RF condenser microphone presents, contrary 10

low Irequency circuits, a low impedance output. Instead 01the high

polarization voltage normally required, a high Irequency capsule

needs only a high Irequency voltage 01about 10 volts, wh ich is pro-

duced bya built-in low noise oscillator (8 MHz). The low capsule

impedance leads to a high performance reliability 01the mlcropho-

nes.

Connection to balanced microphone inputs

In this case the microphone is simply connected to the input 01an

amplilier via a battery adapter MZA 16 TU or the power supply unit

MZN 14 TU.

Powering and connection

Sennheiser electronic introduced A-B powering, which was then

standardized in DIN 45595. As with dynamic microphones, only

two wires are required to connect the microphone when this

powering system is being used. The operating current is led along

the same wires as the audio Irequency signal, so that the circuitry in

the microphone does not have to be connected to earth. Because

01this earth Iree technique the highest possible values 01immunity

lrom noise or disturbance are achieved. For suitable powering units

see "Accessories".

The connection 01Senn heiser condenser microphones and

dynamic microphones as weil is carried out using the prlnciple 01

voltage matching. The advantages 01this system are that neither

impedance variations 01the microphone output nor 01the amplilier

input exercise a noticeable inlluence on the total Irequency

Connection to unbalanced microphone inputs

For connection to unbalanced inputs contact 3 01the connecting

cable between the powering unit and microphone has to be

grounded. Note: With the MZN 16 TU this is only possible after the

unit has been modilied.

Apart Irom cases where the microphone is being used lor proles-

slonal studio purposes, thls ISnot critical, as the large output voltage

01the mlcrophone combined with its low output impedance pro-

vides a large signal to noise ratio. Care should be taken, however,

that no multiple ground circults are lormed when the microphones

are mounted on tripods etc.

Connection to microphone inputs with high sensitivity

IIthe unit being used has a very high Input sensitivlty, i. e. when it IS

normally intended lor use with dynamic microphones, it can be

necessary to reduce the output voltage Irom the microphone by

means 01a voltage divider, which should be built into the micro-

phone cable at the mlcrophone input. By this means the large signal

on the microphone cable is maintained up to Just belore the micro-

phone Input, which results in a Increased signal to noise ratio.

Connection to mixers and sound recording equipment with

powering facilities

II an approprlate voltage source is available the condenser micro-

phone can be powered directly. The voltage should be 12 volts

:t 2 volt. Itshould be so stabilised and filtered, that the unweighted

noise voltage is less than 5 {lV and that the weighted noise compo-

nents are less than 2 {lv. The current consumption 01the micro-

phone is approximately 6 mA. According to the DIN standard the

resistors should be 2 x 180 Q. This means that the voltage drop

across the resistors is appprox. 2 V (Iig. 3).

MKH 816 T-3

Frequency response

Operating principle. . .

Dlrectional charactenstlc

Sensltivlty at 1000 Hz

Impedance at 1000 Hz

Nominalload. . . . . . . . .

Equlvalent sound pressure levelaccordlng

to CCIR468-1

curve A .

MaxImal s.p. I.

Supply voltage

Supply current . . .

Temperature range

Output plug

Wiring .

Dimensions in mm

Welght.

40 20000 Hz

Interferenee transducer

lobe

40 mV/Pa i: 1 dB

approx'8 Q, balanced, floating

"'" 400 Q (200 Q up to 10Pa)

approx. 26 dB

approx. 15 dB

15 Pa ("' 118dB)

12Vi:2V

approx. 6 mA

-1Q°C to + 70°C

3-pln XLR-3-plug,

system Cannon

1:ground. 2: audio, 3: audlo

19 r/J,555 lang

375 9

We reserve the right to alter speciticatlons. In partlcular wlth regard to technical

Improvements.

Accessories

Shock mount MZS 16

(Art-No. 2992)

Shock mount with rubber

suspended plastic clamps. Pre-

vents handling noise. Equipped

with 3/s"thread for mountlng to

mlcrophone booms, ceiling

mountings or tripods.

Windscreen-combination

MZW 816, MZS 16, MZP 816

(Art.-Nr.1930/2992/1932)

This comblnation consists of the

robust, light windscreen basket

MZW 816, shock mount MZS 16

and the inclinable plstol grip

MZP816. The combination is

particularly weil suited for out-

door reportlng use and features

easy handling and high Insensi-

tivity to wind and handling noise.

Windscreen and popp filter

MZW815

(Art.-No. 0896)

Sponge windscreen for

MKH 8161.

Battery adapter MZA 14 TU

(Art.-No. 2959)

For powering one condenser

microphone (AB-powering

according to DIN 45595).

Powering unit MZN 16 TU

(Art.-No.1237)

For simultaneously powering

two microphones (AB-power-

ing). Model with XLR-connec-

tors. Dimensions in mm:

168x120x50.

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SENNHEISERELECTRONICKG.

D-3002 WEDEMARK

TELEFON05130/600-0

TELEX924623

TELEFAX05130/6312

Printed in Germany Publ.1/92 18349/AO4

Sennheiser TU-3 User manual

Brand: Sennheiser

Model: TU-3

Category: Microphones

Type: User manual

This manual is also suitable for

MKH 816 TU-3

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