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 ................................. 14 Using the receiver ......................................................................... 15 Switching the receiver on/off .............................................. 15 Connecting the headphones ................................................. 15 Adjusting the volume ............................................................ 16 Adjusting the balance/FOCUS .............................................. 17 Activating/deactivating the lock mode ............................. 17 Attaching the receiver to clothing ...................................... 17 The operating menu ..................................................................... 18 The buttons ............................................................................. 18 Overview of menus ................................................................ 19 Working with the operating menu ..................................... 20 The operating menu of the receiver .......................................... 22 Adjustment tips for the operating menu ................................. 24 Selecting a channel – CHAN .................................................. 24 Selecting the frequencies to be stored in the channel bank “U” – TUNE ..................................................... 24 Scanning the channel bank for free channels – SCAN .... 25 Adjusting the squelch threshold – SQELCH ....................... 25 Stereo/FOCUS selection – ST-FOC ........................................ 27 Limiting the volume at the headphone output – LTD ..... 27 Activating/deactivating the frequency boost – HI-BST . 27 Selecting the standard display – DISLPY ........................... 28 Entering a name – NAME ...................................................... 28 Loading the factory-preset default settings – RESET ..... 29 Activating/deactivating the pilot tone evaluation – PILOT .................................................................. 29 Activating/deactivating the lock mode – LOCK ............... 29 Exiting the operating menu – EXIT ..................................... 30 If problems occur ... ....................................................................... 31 Error checklist .......................................................................... 31 Recommendations and tips ........................................................ 32 Maintenance and care .................................................................. 32 Additional information ................................................................ 33 Squelch ..................................................................................... 34 Specifications ................................................................................. 35 Connector assignment ........................................................... 36 Accessories .............................................................................. 36 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. Safety instructions .. Please read these instructions carefully and completely before using the receiver. .. Make these instructions easily accessible to all users at all times. Always include these instructions when passing the receiver on to third parties. .. Never open electronic units! If units are opened by customers in breach of this instruction, the warranty becomes null and void. .. Water entering the housing of the receiver can cause a shortcircuit and damage the electronics. Protect the receiver from damp and wet. Only use a slightly damp cloth to clean the receiver. .. Follow the safety instructions on the receiver. 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 c...