Sennheiser SR 3256 - Bedienungsanleitung

Instructions for use

SR 3254

SR 3256

SR 3254

SR 3256

Contents

Safety instructions ............................................................................2

SR 3254/SR 3256 transmitters ......................................................6

Delivery includes ................................................................................7

Overview of operating controls ......................................................8

Indications and displays ...........................................................................9

Preparing the transmitter for use ................................................10

Using the transmitter as a stand-alone unit ......................................10

Rack-mounting several transmitters ...................................................11

Connecting the transmitter to the mains ............................................14

Using transmitters in a multi-channel system ...................................15

Using the transmitter .....................................................................17

Switching the transmitter on/off .........................................................17

The operating menu of the transmitter ......................................19

Overview of the operating menu ..........................................................20

Selecting the frequencies to be stored in the channel bank “U” ...21

Selecting a channel from the channel bank “U” or “F” ....................22

Switching between mono and stereo operation ................................22

Care and maintenance ....................................................................23

Cleaning the transmitter ........................................................................23

Replacing the fuse ....................................................................................23

If problems occur ... .........................................................................25

Error checklist ...........................................................................................25

Additional information ...................................................................26

Specifications ...................................................................................27

Connector assignment ............................................................................28

Accessories .......................................................................................29

Manufacturer declarations ............................................................30

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.

Safety instructions

These instructions for use contain important safety

information.

Read these instructions.

Keep these instructions in a safe place. Always include these

instructions when passing the device on to third parties.

Heed all warnings.

Follow all instructions.

Operation

Use the device in dry rooms only. To reduce the risk of fire or

electric shock, do not expose the device to rain or moisture.

Objects filled with liquids, such as vases or coffee cups, must not

be placed on the device. Do not use the device near water or

liquids.

Never spill liquids of any kind onto the device. Should a spillage

occur, unplug the device and have it checked by a technician.

Never push objects of any kind through openings of this device

as they may touch dangerous voltage points or short-out parts

that could result in fire or electric shock.

Ensure sufficient ventilation. Do not block any ventilation

openings. Install in accordance with the manufacturer’s

instructions.

Do not install near any heat sources such as central heating

radiators, electric heaters, stoves, or other devices that produce

heat (e.g. amplifiers). Keep the device away from direct

sunlight and similar sources of heat.

The device is a Class 1 device. It must only be connected to

properly grounded power outlets.

This device is supplied with an IEC power cable complete with a

moulded mains plug. This is for your safety - do not tamper with

the mains. If the supplied cable does not fit your mains socket,

please consult a competent electrician for a replacement cable

that matches the power output sockets in your country, or to

replace the obsolete socket with one to current standards.

This device should be operated only from the type of power

source indicated on the marking label. lf you are not sure of the

type of power supply to your building, consult your dealer or

local power company.

Do not overload wall outlets and extension cords as this may

result in fire and electric shock.

Protect the power cord from being walked on or pinched,

particularly at plugs, convenience receptacles, and the point

where they exit from the device.

Only use attachments/accessories specified by Sennheiser.

Use only with the mountings specified by Sennheiser. When a

cart is used, use caution when moving the cart/device

combination to avoid injury from tip-over.

Unplug the device during lightning storms or when unused for

long periods of time.

Service

No user serviceable parts inside! Do not attempt to service this

device yourself as opening or removing covers may expose

dangerous voltage or other hazards. If devices are opened by

customers in breach of this instruction, the warranty becomes

null and void.

Refer all servicing to qualified service personnel. Servicing is

required if the device has been damaged in any way, such as

mains cable or plug damage, liquid has been spilled, objects

have fallen inside, the device has been exposed to rain or

moisture, does not operate properly or has been dropped.

Clean only with dry cloth.

Symbols on adhesive labels attached to the device

The adjoining adhesive label is attached to the devices back.

The symbols on this label have the following meaning:

This symbol is intended to alert the user to the presence of un-

insulated dangerous voltage within the product's enclosure

that may be of sufficient magnitude to constitute risk of fire or

electric shock.

This symbol is intended to alert the user to the risk of electric

shock if the unit cover or back is removed. There are no service-

able parts inside. Refer servicing to qualified personnel only.

This symbol is intended to alert the user to the presence of im-

portant operating and maintenance instructions in the litera-

ture accompanying this product.

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

signs that you have been subjected to excessive noise for too

long a time:

yYou can hear ringing or whistling sounds in your ears.

yYou 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

yhaving read these instructions especially the

chapter “Safety instructions”.

yusing the transmitter within the operating conditi-

ons 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.

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 signal-

to-noise ratio and dynamic range due to the inclusion of

Sennheiser’s HDX noise reduction system.

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:

yEasy to use

yStereo/mono selector switch

ySwitching bandwidth of 36 MHZ per transmitter

yTransmission frequencies tunable in steps of 5 kHz

yHDX noise reduction system with more than 90 dB signal-to-

noise ratio

yLC display for frequency, RF output power and deviation

yRugged 19" housing with built-in mains unit; supplied with

rack-mounting kit

ySuitable for multi-channel applications

yRF output power of up to 100 mW

SR 3254

SR 3256

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

yEK 3253

Delivery includes

y1 SR 3254 transmitter or

1 SR 3256 twin transmitter

y1 rack-mounting kit

y1 mains cable

y1 telescopic antenna (with the SR 3254)

2 telescopic antennas (with the SR 3256)

yInstructions for use

Overview of operating controls

Note:

Connections and operating controls marked with a star () in the above illustration

are those for the second transmitter of the SR 3256 twin transmitter.

Headphone output,

¼” (6.3 mm) jack socket

Headphone volume control

LCD bargraph for deviation of the left

channel (DEV L), with overmodulation

display (“PEAK”)

LCD bargraph for deviation of the

right channel and “MONO” (DEV R), with

overmodulation display (“PEAK”)

LCD bargraph for RF output power (RF)

Alphanumeric LC display

SET button

왖button (UP)

왔button (DOWN)

POWER button

Fuse holder and mains voltage

selection (230 or 115 V)

2-pin IEC mains connector

Cable grip for mains cable

Programming interface,

15-pin sub-D socket

Audio input, left (AF IN (L))

Audio input, right

(AF IN (R) + MONO)

Type plate

Antenna output

Indications and displays

Alphanumeric display

“FREQUENCY MHZ” display

“CHANNEL” display

LC dot CHANNEL

LC dot TUNE

LC dot MONO/STEREO

LC dot STEREO (transmitter is set to stereo operation)

LC dot MONO (transmitter is set to mono operation)

MUTE display (transmitter is muted)

6-step bargraph for RF output power

11-step deviation bargraph

(two separate bargraphs for the left and right channel)

Deviation display

The two bargraphs indicate the deviation of the audio signal

of the left and right channel. When the transmitter’s audio

input level is excessively high, “PEAK” lights up.

Display of the RF output power

The bargraph indicates the RF output power. During normal

operation, an RF output power of 100 % is indicated.

   

 



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