Sennheiser SR 3256, SR 3254 User Manual
SR 3254
SR 3254
Instructions for use
SR 3256
4
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.
1
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
2
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.
3
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 uninsulated 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 serviceable parts inside. Refer servicing to qualified personnel only.
This symbol is intended to alert the user to the presence of important operating and maintenance instructions in the literature 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:
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.
4
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 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.
5
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
6
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
7
Overview of operating controls
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
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
SET button
왖 button (UP)
왔 button (DOWN)
POWER button
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.
8
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.
9
Loading...