Sennheiser SR 3256 - Manual

4 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 enclosurethat may be...

5 Intended use of the transmitter Intended use includes y having read these instructions especially thechapter “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 otherthan descr...

7 The channel bank system The SR 3254/SR 3256 transmitter is available in five UHFfrequency 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 16switchable channels each. The...

8 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 c...

9 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 fo...

10 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 onwhich it is placed, four self-adhesive soft rubber feet aresupplied. 왘 Ensure that the base of the transmitter is clean and free ...

11 Rack-mounting several transmitters You can use the supplied rack mount “ears” to mount thetransmitter into a 19" rack (1 U). If you wish to mount theantennas to the front of the rack, use the GA 3030-AM antennamount (see “Accessories” on page 29). When rack-mounting the device, please conside...

12 Setting up the transmitters The SR 3254 and SR 3256 transmitters heat up duringoperation. y Ventilation in fixed installations Ensure sufficient ventilation, especially when the transmittersare mounted into a desk or chassis. Provide for a duct ofsufficient size to ensure a free air flow between ...

14 Connecting the transmitter to the mains The transmitter can be connected to 230 V or 115 V AC. Beforeyou plug the mains connector into the wall socket, please firstcheck that the transmitter is set to the correct mains voltage! The set voltage is shown at the top of the fuse holder . Selecting th...

15 Connecting the mains cable 왘 Insert the supplied mains cable into the socket on thetransmitter and pass the cable through the cable grip. Note A cable grip is particularly important when the transmitter ispermanently rack-mounted. Inside the rack there are often alarge number of cables – a cable ...

16 Mounting and connecting remote antennas Use a remote antenna when the transmitter position is not thebest antenna position for optimum transmission. You canchoose between two antennas (see “Accessories” on page 29): y A 2003 UHF passive directional antenna y A 1031 passive omni-directional antenn...

17 Using the transmitter Switching the transmitter on/off 왘 Press the POWER button to switch the transmitter on or off.After switch-on, the LC display is backlit and the lasttransmission frequency set is displayed. Until the PLL has locked on the desired transmission frequency,the transmitter is mut...

18 Connecting the headphones/monitoring the audio signal Attention! High volume! Even short exposure to high volume levels can damage yourhearing! Set the volume for the connected headphones to theminimum before putting the headphones on. Do not listen athigher volume levels than with loudspeakers. ...

19 The operating menu of the transmitter Via the operating menu, you can quickly and easily change the following settings: The buttons In the operating menu, all settings can be made using the 왖 , 왔 and SET buttons: Canceling an entry When in the setting mode of a menu, you can cancel your entryat a...

20 Overview of the operating menu Display mode Setting mode Press SET for 1 sec. SET SET SET Current channel : U 1... U 16, F 1... F16 SET : Selects the channel : Transmission frequency in steps of 5 kHz Current frequency SET Changing the channel Current channel or current frequency : U 1... U 16, F...

21 TUNE Selecting the frequencies to be stored in the channel bank “U” Via the “ TUNE ” menu, you can freely select the frequencies to be stored in the channel bank “U” (user bank). 왘 Press the 왖 / 왔 buttons to select the “ TUNE ” menu. The LC dot “ TUNE ” lights up. 왘 Press the SET button to get in...

23 Care and maintenance Cleaning the transmitter 왘 Before cleaning, disconnect the transmitter from the mains. 왘 If necessary, you can clean the transmitter with a slightlydamp cloth. Do not use any cleansing agents or solvents. Replacing the fuse 왘 Disconnect the transmitter completely from the mai...

25 If problems occur ... Error checklist If problems occur that are not listed in the above table or if the problems cannot besolved with the proposed solutions, please contact your local Sennheiser agent forassistance. Problem Possible cause Possible solution No operation indication No mains connec...

26 Additional information HDX noise reduction Progress you can hear: The product family is equipped with HDX , the Sennheiser noise reduction system that reduces RF interference. It increases thesignal-to-noise ratio in wireless audio transmission to morethan 90 dB. HDX is a wideband compander syste...

27 Specifications Note: The above data also apply to the second transmitter in the SR 3256. RF characteristics Frequency ranges 518–554, 626–662, 740–776, 786–822, 830–866 MHz Transmission frequencies 1 channel bank with up to 16 factory-preset channels 1 channel bank with up to 16 freely selectable...

28 Connector assignment Overall unit Power supply 115/230 V AC +10 % / –15 % Power consumption SR 3254 max. 13 W Power consumption SR 3256 max. 23 W Dimensions (without rack mount “ears”) 436 x 228 x 43 mm (19", 1 U) Weight SR 3254 approx. 3,300 g Weight SR 3256 approx. 4,000 g Type approval USA...

29 Accessories AC 3000-EU Active Antenna combiner Cat. no. 009424 AC 3000-UK Active Antenna combiner Cat. no. 009410 AC 3000-US Active Antenna combiner Cat. no. 094409 A 1031-U Passive omni-directional antenna Cat. no. 004645 GA 3030-AM Antenna mount Cat. no. 004368 A 2003 UHF Passive directional an...

30 Manufacturer declarations Warranty regulations The guarantee period for this Sennheiser product is 24 months from the date of purchase. Excluded areaccessory items, rechargeable or disposable batteries that are delivered with the product; due to theircharacteristics these products have a shorter ...