SR 3254 SR 3256 Instructions for use 4 SR 3254 SR 3256
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.
Contents Safety instructions ............................................................................ 6 SR 3254/SR 3256 transmitters ...................................................... 8 Delivery includes ................................................................................ 9 Overview of operating controls ....................................................10 Indications and displays .........................................................................
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.
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.
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 channel bank system The SR 3254/SR 3256 transmitter is available in five UHF frequency ranges: Range A: Range B: Range C: Range D: Range E: 518 to 554 MHz 626 to 662 MHz 740 to 776 MHz 786 to 822 MHz 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.
Overview of operating controls Headphone output, ¼” (6.
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
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. 왘 Ensure that the base of the transmitter is clean and free from grease before mounting the rubber feet. 왘 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.
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 30). Setting up the transmitters The SR 3254 and SR 3256 transmitters heat up during operation. y Ventilation in fixed installations Ensure sufficient ventilation, especially when the transmitters are mounted into a desk or chassis.
Rack-mounting the transmitter and mounting the antennas to the front of the rack 왘 Mount the antenna holders to the handles of the transmitter as shown in the diagram on the left. 왘 Hook the two rack mount “ears” " to the rear of the transmitter. 왘 Pull the cables of the antenna holders in the rack mount “ears”. through the holes 왘 Secure the rack mount “ears” to the left and right of the transmitter using four recessed head screws respectively.
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 WARNING! Electric shock hazard! In case of improper handling, you may come into contact with electrically conducting parts and receive an electric shock when removing the fuse holder.
Connecting the mains cable 왘 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.
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 30): y A 2003 UHF passive directional antenna y A 1031 passive omni-directional antenna A 2003 A 1031 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.
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 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 %.
왘 First, set the volume control # to the lowest volume by turning it to the left as far as possible. Then gradually turn up the volume.
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 왖 , 왔 and SET buttons: Buttons 왖/왔 Mode Function of the button Display mode Selects a menu.
Overview of the operating menu Display mode Setting mode Press SET for 1 sec. SET Current channel : U 1... U 16, F 1... F16 SET: Selects the channel SET : Transmission frequency in steps of 5 kHz Current frequency SET SET Current channel or current frequency Changing the channel : U 1... U 16, F 1...
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 into the setting mode of the “TUNE” menu. The LC dot “TUNE” and the “FREQUENCY MHZ” display start flashing.
CHANNEL Selecting a channel from the channel bank “U” or “F” 왘 Press the 왖/왔 buttons to select the “CHANNEL” menu. The LC dot “CHANNEL” and the “CHANNEL” display light up. 왘 Press the SET button to get into the setting mode. 왘 Press the 왖/왔 buttons to select the desired channel. 1 Sek. 왘 Press the SET button to store your selection. “Sto.” briefly appears on the display. MONO/STEREO Switching between mono and stereo operation 왘 Press the 왖/왔 buttons to select the “MONO/STEREO” menu.
Care and maintenance Cleaning the transmitter CAUTION! Water can damage the electronics of the transmitter! Water entering the housing of the transmitter can cause a short-circuit and damage the electronics. 왘 Only use a slightly damp cloth to clean the transmitter. 왘 Before cleaning, disconnect the transmitter from the mains. 왘 If necessary, you can clean the transmitter with a slightly damp cloth. Do not use any cleansing agents or solvents.
If the replacement fuse also blows, please contact your local Sennheiser agent or send the transmitter, with a precise description of the trouble, to a Sennheiser service partner in your area. You can find the address of your nearest service partner in the enclosed service card or on the Internet at “http://www.sennheiser.com/sennheiser/icm.nsf/root/ service_partner”.
If problems occur ...
Additional information HDX noise reduction RF link Inherent noise of the RF link Transmitter Receiver Progress you can hear: The product family is equipped with HDX, the Sennheiser noise reduction system that reduces RF interference. It increases the signal-to-noise ratio in wireless audio transmission to more than 90 dB. HDX is a wideband compander system which compresses the audio signal in the transmitter in a 2:1 ratio (related to dB) to lift it above the inherent noise floor of the RF link.
Specifications 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 channels (frequencies tunable in steps of 5 kHz) Switching bandwidth 36 MHz Frequency stability ±10 ppm (-10° C to +55°C) Antenna output BNC socket, 50 Ω RF output power max.
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: FCC-Part 74.861 FCC ID: DMOSREK3K Canada: RSS-123 IC: 2099A-SREK3K EU: ETSI EN 300 454-1/-2 CE 0682! Connector assignment SR 3254/SR 3256 ¼“ (6.
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 antenna Cat. no. 003658 GZL 1019 A5 BNC-BNC coaxial cable, length 5 m Cat. no. 002325 GZL 1019 A10 BNC-BNC coaxial cable, length 10 m Cat. no. 002326 GZV 1019A BNC coupler Cat. no.
Warranty regulations The guarantee period for this Sennheiser product is 24 months from the date of purchase. Excluded are accessory items, rechargeable or disposable batteries that are delivered with the product; due to their characteristics these products have a shorter service life that is principally dependent on the individual frequency of use. The guarantee period starts from the date of original purchase. For this reason, we recommend that the sales receipt be retained as proof of purchase.
Sennheiser electronic GmbH & Co. KG 30900 Wedemark, Germany Phone +49 (5130) 600 0 Fax +49 (5130) 600 300 www.sennheiser.com Printed in Germany Publ.
