Sennheiser Electronic 2SREK3K User Manual

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Bedienungsanleitung

Instructions for use

Notice d‘emploi

Istruzioni per l‘uso

Instrucciones de uso

Gebruiksaanwijzing

SR 3254
SR 3256

SR 3254

SR 3256

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Bedienungsanleitung..................................................................3

Instructions for use.................................................................. 31

Notice d’emploi........................................................................ 59

Istruzioni per l’uso................................................................... 87

Instrucciones de uso ............................................................. 115

Gebruiksaanwijzing .............................................................. 143

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SR 3254
SR 3256

Instructions for use

SR 3254

SR 3256

4

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32

Thank you for choosing Sennheiser!

We have designed this product to give you reliable operation
over many years. Over sixty years of accumulated expertise in
the design and manufacture of high-quality electro-acoustic
equipment have made Sennheiser a world-leading company in
this field.

Please take a few moments to read these instructions carefully,
as we want you to enjoy your new Sennheiser products quickly
and to the fullest.

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Contents

Contents ............................................................................................33

Safety instructions ..........................................................................34

SR 3254/SR 3256 transmitters ....................................................36

Delivery includes ..............................................................................37

Overview of operating controls ....................................................38

Indications and displays .........................................................................39

Preparing the transmitter for use ................................................40

Using the transmitter as a stand-alone unit ......................................40

Rack-mounting several transmitters ...................................................41

Connecting the transmitter to the mains ............................................43

Using transmitters in a multi-channel system ...................................44

Using the transmitter .....................................................................46

Switching the transmitter on/off .........................................................46

The operating menu of the transmitter ......................................48

Overview of the operating menu ..........................................................49

Selecting the frequencies to be stored in the channel
bank “U” –
Selecting a channel from the channel bank “U” or
“F” –
Switching between mono and stereo
operation –

TUNE ......................................................................................50

CHANNEL.........................................................................................51

MONO/STEREO ..................................................................51

Care and maintenance ....................................................................52

Cleaning the transmitter ........................................................................52

Replacing the fuse ....................................................................................52

If problems occur ... .........................................................................54

Error checklist ....................................................................54

Additional information ...................................................................55

Specifications ...................................................................................56

Connector assignment ............................................................................57

Accessories .......................................................................................58

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Safety instructions

y Please read these instructions carefully and completely

before using the transmitter.

y Make these instructions easily accessible to all users at all

times. Always include these instructions when passing the
transmitter on to third parties.

y Never open the transmitter, otherwise you can receive an

electric shock. If units are opened by customers in breach of
this instruction, the warranty becomes null and void.

y Keep the transmitter away from direct sunlight, central

heating radiators, electric heaters and similar sources of
heat. Ensure sufficient ventilation, especially when it is
mounted into a 19" rack.

y Water entering the housing of the transmitter can cause a

short-circuit and damage the electronics. Protect the
transmitter from damp and wet.

y Do not place any objects containing liquids on the top of

the transmitter.

y Use the transmitter in dry rooms only. Never expose it to

water (e.g. never place it in a position where it could be
subjected to water splashes).

y Only use a slightly damp cloth to clean the transmitter.

Attention! High volume!

This is a professional transmission system.
Commercial use is subject to the safety-at-work
regulations. Sennheiser, as the manufacturer, is
therefore obliged to expressly point out possible

health risks arising from use.

This system is capable of producing sound pressure exceeding
85 dB(A). 85 dB(A) is the sound pressure corresponding to the
maximum permissible volume which is by law (in some
countries) allowed to affect your hearing for the duration of a
working day. It is used as a basis according to the specifications
of industrial medicine. Higher volumes or longer durations can
damage your hearing. At higher volumes, the duration must be
shortened in order to prevent damage. The following are sure

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signs that you have been subjected to excessive noise for too
long a time:

y You can hear ringing or whistling sounds in your ears.
y You have the impression (even for a short time only) that

you can no longer hear high notes.

Intended use of the transmitter

Intended use includes

y having read these instructions especially the chapter “Safety

instructions”.

y using the transmitter within the operating conditions as

described in these instructions.

Improper use

Improper use is when you use the transmitter other than
described in these instructions or when you use the transmitter
under operating conditions different from those described in
these instructions.

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SR 3254/SR 3256 transmitters

With the wireless in-ear monitoring system, consisting of the
SR 3254 or SR 3256 stereo transmitter and the EK 3253
bodypack receiver, musicians, video and sound amateurs,
reporters/broadcasters, etc. can directly monitor the received
sound signals without troublesome cables or monitor speakers
being required. In addition, the system can also be used for any
application where talkback signals are to be transmitted.

The system has superb audio quality with an increased signal­to-noise ratio and dynamic range due to the inclusion of
Sennheiser’s HDX noise reduction system.

SR 3254

SR 3256

4

The SR 3254 is a single stereo transmitter in a 19" 1 U housing.

The SR 3256 consists of two complete stereo transmitters in a
19" 1 U housing.

The stereo transmitters have the following features:

y Easy to use
y Stereo/mono selector switch
y Switching bandwidth of 36 MHZ per transmitter
y Transmission frequencies tunable in steps of 5 kHz
y HDX noise reduction system with more than 90 dB signal-to-

noise ratio

y LC display for frequency, RF output power and deviation
y Rugged 19" housing with built-in mains unit; supplied with

rack-mounting kit

y Suitable for multi-channel applications
y RF output power of up to 100 mW

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The channel bank system

The SR 3254/SR 3256 transmitter is available in five
UHF frequency ranges:

Range A: 518 to 554 MHz
Range B: 626 to 662 MHz
Range C: 740 to 776 MHz
Range D: 786 to 822 MHz
Range E: 830 to 866 MHz

The transmitter has two channel banks with up to 16
switchable channels each. The channels of the channel
bank “F“ (fixed bank) have been factory-preset to
customer-specific transmission frequencies. These
frequencies cannot be changed.

The channel bank “U” (user bank) allows you to freely
select and store frequencies.

Recommended receiver

y EK 3253

Delivery includes

y 1 SR 3254 transmitter or

1 SR 3256 twin transmitter

y 1 rack-mounting kit
y 1 mains cable
y 1 telescopic antenna (with the SR 3254)

or
2 telescopic antennas (with the SR 3256)

y Instructions for use

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