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SR 3254
SR 3256
Instructions for use
4
SR 3254
SR 3256
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Contents Safety instructions ............................................................................2 SR 3254/SR 3256 transmitters ...................................................... 6 Delivery includes ................................................................................7 Overview of operating controls ...................................................... 8 Indications and displays ........................................................................... 9 Preparing the tr
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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 devi
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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 plu
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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 servi
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Intended use of the transmitter Intended use includes having read these instructions especially the chapter “Safety instructions”. 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
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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 increas
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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
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Overview of operating controls Headphone output,
Fuse holder and mains voltage ¼” (6.3 mm) jack socket selection (230 or 115 V) Headphone volume control 2-pin IEC mains connector LCD bargraph for deviation of the left Cable grip for mains cable channel (DEV L), with overmodulation Programming interface, display (“PEAK”) 15-pin sub-D socket LCD bargraph for deviation of the Audio input, left (AF IN (L)) right channel and “MONO” (DEV R), with Audio input, right over
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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
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Preparing the transmitter for use Using the transmitter as a stand-alone unit Mounting the transmitter feet To ensure that the transmitter cannot slip on the surface on which it is placed, four self-adhesive soft rubber feet are supplied. Ensure that the base of the transmitter is clean and free from grease before mounting the rubber feet. Fix the rubber feet to the base of the transmitter by peeling of the safety paper and fitting them as shown in the diagram on the left. Attention! Some fu
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Rack-mounting several transmitters You can use the supplied rack mount “ears” to mount the transmitter into a 19" rack (1 U). If you wish to mount the antennas to the front of the rack, use the GA 3030-AM antenna mount (see “Accessories” on page 29). When rack-mounting the device, please consider that, during operation, the ambient temperature within the rack may significantly rise above room temperature. However, the ambient temperature within the rack must not exceed the temperature limit spec
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Setting up the transmitters The SR 3254 and SR 3256 transmitters heat up during operation. Ventilation in fixed installations Ensure sufficient ventilation, especially when the transmitters are mounted into a desk or chassis. Provide for a duct of sufficient size to ensure a free air flow between the trans- mitters. Sufficient ventilation in a rack When operating several transmitters in a rack, ensure sufficient ventilation or cooling. We recommend not stacking more than two transmitter direct
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Rack-mounting the transmitter and mounting the antennas to the front of the rack Mount the antenna holders to the handles of the transmitter as shown in the diagram on the left. Hook the two rack mount “ears” " to the rear of the transmitter. Pull the cables of the antenna holders through the holes in the rack mount “ears”. Secure the rack mount “ears” to the left and right of the transmitter using four recessed head screws respectively. Connect the cables of the antenna holders to
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Connecting the transmitter to the mains The transmitter can be connected to 230 V or 115 V AC. Before you plug the mains connector into the wall socket, please first check that the transmitter is set to the correct mains voltage! The set voltage is shown at the top of the fuse holder
. Selecting the mains voltage Electric shock hazard! WARNING! In case of improper handling, you may come into contact with electrically conducting parts and receive an electric shock when removing the fuse holder.
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Connecting the mains cable Insert the supplied mains cable into the socket on the transmitter and pass the cable through the cable grip. Note A cable grip is particularly important when the transmitter is permanently rack-mounted. Inside the rack there are often a large number of cables – a cable grip prevents the cables from pulling each other out. Using transmitters in a multi-channel system You can combine several transmitters to make a multi-channel system. To do so, you require an antenna
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Mounting and connecting remote antennas Use a remote antenna when the transmitter position is not the best antenna position for optimum transmission. You can choose between two antennas (see “Accessories” on page 29): A 2003 UHF passive directional antenna A 1031 passive omni-directional antenna A 2003 Use a low-attenuation 50-Ω cable to connect the antenna to the transmitter. Ready-made antenna cables from Sennheiser are available as accessories with length of 5 m and 10 m. If possible, use
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Using the transmitter Switching the transmitter on/off Press the POWER button to switch the transmitter on or off. After switch-on, the LC display is backlit and the last transmission frequency set is displayed. Until the PLL has locked on the desired transmission frequency, the transmitter is muted. “MUTE” appears on the display and the LCD bargraph for RF output power (RF) indicates 0 %. Note The POWER button works in the secondary circuit of the integrated mains transformer, and thus
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Connecting the headphones/monitoring the audio signal Attention! High volume! Even short exposure to high volume levels can damage your hearing! Set the volume for the connected headphones to the minimum before putting the headphones on. Do not listen at higher volume levels than with loudspeakers. Connect headphones with a ¼“ (6.35 mm) stereo jack plug to the headphone output to monitor the stereo audio signal present at the audio inputs AF IN (L) and AF IN (R) + MONO. Note Even during
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The operating menu of the transmitter Via the operating menu, you can quickly and easily change the following settings: Menu Function of the menu TUNE Setting a transmission frequency for the channel bank “U” (user bank) CHANNEL Selecting a channel from the channel bank “U” or “F” MONO/STEREO Switching between mono and stereo operation The buttons In the operating menu, all settings can be made using the , and SET buttons: Buttons Mode Function of the button / Display mode Selects a menu.
