Sennheiser EK 3253 Instructions For Use Manual

Wireless in-ear monitoring system.
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EK 3253
Instructions for use


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  • Page 1

    EK 3253 Instructions for use...

  • Page 2: Table Of Contents

    Contents Safety instructions ... 6 Delivery includes ... 7 EK 3253 bodypack receiver ... 8 The operating controls ... 9 Indications and displays ... 10 The LC display ... 10 Preparing the receiver for use ... 13 Inserting and replacing the batteries ... 13 Inserting and charging the accupack ...

  • Page 3: Table Of Contents

    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.

  • Page 4: Safety Instructions

    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).

  • Page 5: Delivery Includes

    Intended use of the receiver Intended use includes having read these instructions especially the chapter “Safety instructions”. using the receiver within the operating conditions as described in these instructions. Improper use Improper use is when you use the receiver other than described in these instructions or when you use the receiver under operating conditions different from those described in these instructions.

  • Page 6: Ek 3253 Bodypack Receiver

    The system has superb audio quality with an increased signal- to-noise ratio and dynamic range due to the inclusion of Sennheiser’s The EK 3253 bodypack receiver has the following features: Easy to use...

  • Page 7: The Operating Controls

    The operating controls Headphone output (PHONES), 3.5 mm jack socket Antenna Red LED for operation and battery status indication (LOW BAT/ON) Green LED for RF signal indication (RF) Charging contacts button rocker button (UP/DOWN) Battery compartment Battery compartment cover Unlocking button button LC display On/off/volume control...

  • Page 8: Indications And Displays, The Lc Display

    Indications and displays The LC display Alphanumeric display “B.CH“ – appears when the channel bank and the channel number are displayed “MHz“ – appears when the frequency is displayed 4-step battery status display Lock mode icon (lock mode is activated) “PILOT”...

  • Page 9

    Red LED lit up: Red LED flashing: The batteries are/the accupack is going flat In addition, the 4-step battery status display panel provides information on the remaining battery/accupack capacity: 3 segments: 2 segments: 1 segment: Battery icon flashing: Modulation display of the received transmitter The level display for audio signal “AF”...

  • Page 10

    “PILOT” display The “PILOT” display pilot tone evaluation is activated (see “Activating/deactivating the pilot tone evaluation – PILOT” on page 29). RF signal indication The level display for RF signal “RF” shows the strength of the received RF signal. In addition, the green LED (RF) front of the receiver lights up when an RF signal is being received.

  • Page 11: Preparing The Receiver For Use, Inserting And Replacing The Batteries

    Preparing the receiver for use Inserting and replacing the batteries For powering the EK 3253 receiver, two 1.5 V AA size batteries are required. Press the two unlocking buttons compartment cover Insert the two batteries as shown in the diagram above. Please observe correct polarity when inserting the batteries.

  • Page 12: Inserting And Charging The Accupack

    Inserting and charging the accupack The receiver can also be powered via the rechargeable Sennheiser BA 2015 accupack. Insert the accupack into the battery compartment as described above. The receiver has two charging contacts contact on its short sides. The accupack can be recharged while remaining in the receiver.

  • Page 13: Using The Receiver, Switching The Receiver On/off, Connecting The Headphones

    Using the receiver Switching the receiver on/off To switch the receiver on, turn the volume control right until it clicks. The red LED To switch the receiver off, turn the volume control left until it clicks. The red LED Note: The receiver has a short switch-on delay.

  • Page 14: Adjusting The Volume

    Connect the supplied earphones or any Sennheiser stereo headphones with 3.5 mm stereo jack plug to the headphone output (PHONES) First, set the volume control turning it to the left as far as possible. Then gradually turn up the volume.

  • Page 15: Adjusting The Balance/focus, Activating/deactivating The Lock Mode, Attaching The Receiver To Clothing

    Adjusting the balance/FOCUS During stereo operation – and provided that the standard display is shown – the rocker button serves to adjust the balance between the left and right stereo signal. During FOCUS operation, the rocker button serves to adjust the relative levels of the two separate channels in the mixed mono signal (see “Stereo/FOCUS selection –...

  • Page 16: The Operating Menu, The Buttons

    The operating menu The buttons Buttons Mode Standard display Operating menu Setting mode Standard display Operating menu Setting mode Standard display Operating menu Setting mode To ... get into the operating menu get into the setting mode of the selected menu store the settings and return to the previous menu level In stereo operation:...

  • Page 17: Overview Of Menus

    Overview of menus Display Function of the menu CHAN Selecting a channel TUNE Setting a receiving frequency for the channel bank “U” (user bank) SCAN Scanning the channel bank for free channels SQELCH Adjusting the squelch threshold ST-FOC Stereo/FOCUS selection Limiting the volume at the headphone output HI-BST Activating/deactivating the frequency boost...

  • Page 18: Working With The Operating Menu

    Working with the operating menu By way of example of the “TUNE” menu, this section describes how to use the operating menu. After switching on the receiver, the standard display is shown on the display panel. Getting into the operating menu Press the button to get from the standard display into the operating menu.

  • Page 19

    Adjusting a setting Press the By briefly pressing the / rocker button, the display jumps either forwards or backwards to the next setting. In the “CHAN”, “TUNE”, “NAME” and “BAL/FOC” menu, the rocker button features a “fast search” function. If you hold down a button, the display cycles continuously.

  • Page 20: The Operating Menu Of The Receiver

    The operating menu of the receiver EXIT CHAN Changing the channel TUNE Setting the frequency for channel bank “U” SCAN Scanning for free channels SQELCH Setting the squelch threshold ST--FOC Switching between stereo and FOCUS operation Limiting the volume at the headphone output HI--BST Boosting the...

  • Page 21

    HI-BST DISPLY Switching between the standard displays NAME Assigning the receiver a name RESET Loading the factory- preset default values PILOT Activating/deactivating the pilot tone evaluation LOCK Activating/deactivating the lock mode EXIT Exiting the operating menu CHAN Stereo selection Focus selection Adjusting the balance/ Focus...

  • Page 22: Adjustment Tips For The Operating Menu

    Adjustment tips for the operating menu Selecting a channel – Via the “CHAN” menu, you can switch between the channels in the channel banks “F” (fixed bank) or “U” (user bank). The channel bank “F“ has up to 16 switchable channels that are factory-preset to customer-specific receiving frequencies.

  • Page 23: Scanning The Channel Bank For Free Channels – Scan

    Press the button to confirm your selection. The receiver changes immediately to the new frequency. Scanning the channel bank for free channels – SCAN Before putting one or several transmission links into operation, you should scan the channel bank for free channels. Starting the scan and storing the scan result Before starting the scan, switch all transmitters of your system off, since channels used by switched-on...

  • Page 24

    Note: Before adjusting the squelch threshold to a different setting, use the volume control connected headphones to the minimum. There are three possible squelch setting: LO = low MID = middle = high High volume levels can damage your hearing! CAUTION! When in the setting mode of the “SQELCH”...

  • Page 25: Stereo/focus Selection – St-foc, Limiting The Volume At The Headphone Output – Ltd

    Stereo/FOCUS selection – ST-FOC Via the “ST-FOC” menu, you can switch between stereo and FOCUS operation. In both operating modes, the corresponding transmitter has to be set to stereo operation. When the receiver is set to stereo operation, the left-right signals are available as usual.

  • Page 26

    Selecting the standard display – Via the “DISPLY” menu, you can select the standard display: Selectable standard display “FREQ” “NAME” “CHAN” Entering a name – Via the “NAME” menu, you can enter a freely selectable name for the receiver. You can, for example, enter the name of the performer for whom the adjustments have been made.

  • Page 27: Loading The Factory-preset Default Settings – Reset

    Press the select the next character. Have you entered the name completely? Press the button to store your setting and to return to the previous menu level. Loading the factory-preset default settings – RESET Via the “RESET” menu, you can load the factory-preset default settings.

  • Page 28

    Press the two unlocking buttons compartment cover Press the appear on the display. Press the display. Confirm your selection by pressing the “STORED” appears on the display and the lock mode is deactivated. Exiting the operating menu – Via the “EXIT” menu, you can exit the operating menu and return to the standard display.

  • Page 29: Adjusting The Squelch Threshold – Sqelch, If Problems Occur, Error Checklist

    If problems occur that are not listed in the above table or if the problems cannot be solved with the proposed solutions, please contact your local Sennheiser agent for assistance. Possible solution Replace the batteries or recharge the...

  • Page 30: Recommendations And Tips, Maintenance And Care

    Recommendations and tips ... for the receiver The antenna must not be in direct contact with the body..for optimum reception Reception range depends to a large extent on location. There should be a “free line of sight” between transmitting and receiving antennas.

  • Page 31: Additional Information

    Additional information noise reduction Transmitter 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. 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.

  • Page 32: Squelch

    Squelch Pilot tone squelch When set to stereo operation, the transmitter adds a 19-kHz pilot tone to the audio signal. The receiver checks incoming audio signals to see if the pilot tone is present. In the absence of the 19-kHz signal, the receiver’s audio output will remain muted, even if a strong RF signal is present.

  • Page 33: Specifications

    ±20 ppm (-10 to +55°C) typ. 1.5 μV at 52 dBA typ. 75 dB typ. 75 dB typ. 90 dB 4 steps: OFF 5 dBμV MID: 15 dBμV 25 dBμV Sennheiser 40–15,000 Hz ≥ 91 dB(A) ≤ 0.9 % 3.5 mm jack socket...

  • Page 34: Connector Assignment, Accessories

    AF output power (at peak deviation, 1 kHz Overall unit Temperature range Power supply Nominal voltage Power consumption Power consumption with switched-off receiver Operating time (with batteries) Operating time (with BA 2015 accupack) Dimensions in mm Weight (incl. batteries) Type approval IE 4 earphones Frequency response Max.

  • Page 35

    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.

  • Page 36

    Sennheiser electronic GmbH & Co. KG 30900 Wedemark, Germany Phone +49 (5130) 600 0 Fax +49 (5130) 600 300 Printed in Germany Publ. 08/05 512765/A01...

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