F.01U.196.221 Rev.
Ascend Proprietary Notice The product information and design disclosed herein were originated by and are the property of Bosch Security Systems, Inc. Bosch reserves all patent, proprietary design, manufacturing, reproduction, use and sales rights thereto, and to any article disclosed therein, except to the extent rights are expressly granted to others. Copyright Notice Copyright 2011 by Bosch Security Systems, Inc. All rights reserved.
Ascend 3 FAA The Telex Ascend Headset (with or without microphone) is approved for aircraft use under FAA TSO-C139. The conditions and tests required for the TSO approval of this article are minimum performance standards. It is the responsibility of those installing this article, either on or within a specific type or class of aircraft, to determine that the aircraft installation conditions are within the TSO standards. TSO articles may have separate approval for installation on aircraft.
Ascend Headset Configuration Table NOTE: The table below displays the combination of the headset and cord/boom assembly which have been FAA TSO C139 approved.
Table of Contents Headset Configuration Table ............................................................................................................................... 4 INTRODUCTION ......................................................................................................................... 9 Important Safety Instructions ...................................................................................................................9 General Description ...............................
Ascend Charge the Battery ............................................................................................................................................. 32 WIRING DIAGRAMS ................................................................................................................35 SPECIFICATIONS ....................................................................................................................37 Specifications ........................................................
List of Figures FIGURE 1. FIGURE 2. FIGURE 3. FIGURE 4. FIGURE 5. FIGURE 6. FIGURE 7. FIGURE 8. FIGURE 9. FIGURE 10. FIGURE 11. FIGURE 12. FIGURE 13. Single-Sided Headset Reference View ............................................................................. 11 Dual-Sided and ANR Dual-Sided Headset Reference View ............................................ 12 Filler Module ....................................................................................................................
Bosch Security Systems, Inc. Ascend Technical Manual F.01U.196.221 Rev.
CHAPTER 1 Introduction Important Safety Instructions 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Be sure, while wearing the headset, you are still able to hear all warning tones and signals. If you cannot hear the warning tones or signals, you may need to adjust your headset. 6. This headset is capable of producing sound pressure levels above 100dB SPL. 7. Refer all servicing to qualified service personnel.
Introduction Ascend Features Three (3) Headset Frame Options - Installation Options - Modular Design - The Ascend gives you three (3) options when selecting the type of headset perfect for your environment: • Single-Sided Headset without ANR (Active Noise Reduction) • Dual-Sided Headset without ANR • Dual-Sided Headset with ANR The Ascend has two (2) options for aircraft installation; dual plug or XLR. You can take your headset to any aircraft installation and plug right in and get to work.
Ascend Introduction 11 Headset – Single-Sided FIGURE 14. Single-Sided Headset Reference View 1. Headset Adjustment Slider. For more information, see “Headset Adjustment and Sizing” on page 21. 2. Headband Cushion 3. Temple Pad 4. Ear Cushion 5. Windscreen 6. Boom Mic 7. Side Pads Bosch Security Systems, Inc. Technical Manual F.01U.196.221 Rev.
Introduction Ascend Dual-Sided Headset Reference Diagram FIGURE 15. Dual-Sided and ANR Dual-Sided Headset Reference View 1. Headset Slider 2. Headband Cushion 3. ANR Switch (ANR equipped module only) NOTE: The switch label is used to determine the on and off position for ANR 4. Battery Module/Filler Module 5. Ear Cup Cushions 6. Microphone Module 7. Microphone Windscreen 8. Side Pads Bosch Security Systems, Inc. Technical Manual . F.01U.196.221 Rev.
Ascend Introduction 13 Filler Module FIGURE 16. Filler Module The Filler Module can be used to fill any unused module spots. It can be used on either side of the headset, left or right ear cup. Battery Charger FIGURE 17. Battery Charger Reference Diagram 1. Operation Mode LED - For more information, see “Battery Module” on page 31. 2. Module Release Button 3. Power Supply Connector NOTE: The battery charger uses a universal power pack with a mini-USB connector.
Introduction Ascend Battery Charger Power Supply FIGURE 18. Standard Power Supply and Plug Adapters Standard Power Supply 1. Wall Pack 2. US Plug (standard) World Power Supply Adapters (Optional - p/n PRD000253005) 3. UK Plug (optional) 4. Euro Plug (optional) 5. Australian Plug (optional) Bosch Security Systems, Inc. Technical Manual F.01U.196.221 Rev.
CHAPTER 2 Configuration and Installation CAUTION: The Ascend was designed for use in multiple application settings. When using the headset in an aviation application, use the following sections to verify the proper configuration and settings. Before First Use Battery Charging For information on charging the battery, see “Charge the Battery” on page 32. Battery Installation For information on installing the battery, see “Remove and Replace Modules” on page 19. Bosch Security Systems, Inc.
Configuration and Installation Ascend Installation Instructions NOTE: The Ascend headset dip switches have been set from the factory for use in the most common applications. We recommend these switches not be changed unless necessary.
Ascend Configuration and Installation 17 Install the XLR Plug Headset in an Aircraft To install the XLR plug headset in an aircraft, do the following: > Insert the XLR plug into the XLR jack on the aircraft audio panel. For a detailed XLR plug wiring diagram, see Figure 25 on page 35. Audio Input Installation The Ascend headset can also be used to listen to music, GPS information, etc.
Configuration and Installation Bosch Security Systems, Inc. Ascend Technical Manual F.01U.196.221 Rev.
CHAPTER 3 Operation and Maintenance Operation Instructions Remove and Replace Modules All input modules, batteries, filler modules, etc. are removed and replaced the same way. IMPORTANT: When removing a module, put only enough pressure on the module release button to pop the module out. The module release button is designed to be used with fingers only. Do not use any sharp objects or tools to press the module release button. To remove a module, do the following: 1.
Operation and Maintenance 2. Ascend Slide the module out and up taking care to clear the mounting tab from the mounting tab hole. To replace a module, do the following: 1. Align the mounting tab with the mounting tab hole. 2. Slide the module into place. 3. Press down on the module, snapping it into the ear shell. Bosch Security Systems, Inc. Technical Manual F.01U.196.221 Rev.
Ascend Operation and Maintenance 21 Headset Adjustment and Sizing The headset should fit comfortably over the head and ears without pinching or gapping. A comfortable fit is conducive to effective and pleasant use. FIGURE 19. Proper Headset Placement To adjust the headband size, do the following: 1. With the headset resting securely on the top of the head, slide the ear shell up and down to center the ear cup over the ear. 2.
Operation and Maintenance Ascend Boom Mic Adjustment From the factory, the boom mic is installed on the left side of the headset. However, you can interchange the boom mic for right-side use, see “Remove and Replace Modules” on page 19. For best clarity, place the boom mic as close to the mouth as possible and speak into the mic (see Figure 20). FIGURE 20. Boom Mic Movement Bosch Security Systems, Inc. Technical Manual F.01U.196.221 Rev.
Ascend Operation and Maintenance 23 Turn the ANR On/Off (ANR Capable Headset Only) ANR is used to reduce unwanted noise in the headset from the surrounding environment. The ANR switch is located on the left ear shell, as seen in Figure 21. FIGURE 21. ANR Switch To turn ANR on, do the following: > On the left ear cup, move the ANR switch to the up position (indicated by 1 on the label). To turn ANR off, do the following: 1.
Operation and Maintenance Ascend Configure the Speaker Volume Speaker Volume is configured using dip switch settings located on the main board of the headset. The switch bank is located on the boom mic module and the listen only module. To access the dip switches, do the following: NOTE: Dip switches are located on the boom mic module and the listen only module. This feature is not available on the audio input module.
Ascend Operation and Maintenance 25 Set Mono or Left Only Mode Audio on the headset can be configured to be heard either Mono or Left Only. This means it can come from both sides of the headset or from the left side only. This configuration is done through setting dip switches located on the interface module. Dip Switch Settings NOTE: The two (2) left-most switches are used to configure mono or left only operation. TABLE 2.
Operation and Maintenance Ascend Replace the Earcup and Headband Cushion There are two (2) cushion replacement points on the Ascend Headset; two (2) ear cup cushions for dual-sided headsets (one (1) ear cup cushion for single-sided headsets) and one (1) headband cushion. To replace the ear cup cushion, do the following: 1. Grasp the old ear cushion and pull it off the ear cup. 2.
Ascend Operation and Maintenance 27 To replace the three-cushion version headband cushion, do the following: 1. Grasp the headband cushion. 2. Pull the old cushion off the headband. 3. Align the new top cushion to the top of the headband. 4. Align the right side cushion to the right side of the headband. 5. Align the left side cushion to the left side of the headband. 6. Firmly press the new headband cushions in place. Replace the Windscreen To replace the wind screen, do the following: 1.
Operation and Maintenance Ascend Adjust Microphone Gain The microphone gain has been factory-adjusted to the nominal level required for aviation use, and should not require adjustment. Any changes to the microphone gain should be done by a qualified avionics technician. NOTE: Adjustments should be made in small increments. To adjust the gain trimmer, do the following: 1. Insert a small, flathead screwdriver through the access hole in the boom mic module. 2.
Ascend Operation and Maintenance 29 Care and Maintenance Clean the Headset When cleaning your headset, do the following: • • IMPORTANT: use a soft, slightly damp cloth (water only). if necessary, a mild mix of soapy water may be used. Excessive water can damage the headset and cause short circuits electrical components of the unit. Do not use solvents or chemicals when cleaning your headset as it may cause damage or inoperability.
Operation and Maintenance Bosch Security Systems, Inc. Ascend Technical Manual F.01U.196.221 Rev.
CHAPTER 4 Battery Module Battery Module The battery module is only used to: • • • provide power for the ANR when the aircraft does not provide power for the ANR when not connected to the aircraft provide enhanced audio quality when the audio input module is installed. Replace the Battery A battery is required only when you are not plugged into a power source, such as an aircraft audio panel, to power the ANR. CAUTION: If this is the first time using the batteries, see “Charge the Battery” on page 32.
Battery Module Ascend Charge the Battery IMPORTANT: FIGURE 23. Before installing the battery for the first time, charge the battery for at least an hour and a half to ensure a fully charged unit. A fully charged battery lasts approximately 40 hours between charges. Battery Charger Reference Diagram The battery charger has an LED, shown in Figure 23, that displays two (2) color states: Green LED – The charger is on. Red LED – The battery is being charged.
Ascend Battery Module 33 To charge a battery, do the following: 1. Plug the power supply into an electrical outlet. 2. Attach the power supply to the charger. The LED lights green. 3. Align the mounting tab with the mounting tab hole on the battery charger. 4. Slide the battery module into place. 5. Press down on the battery module, snapping it into the battery module. The LED lights red while the battery is charging, and lights green when it is finished charging. Bosch Security Systems, Inc.
Battery Module Bosch Security Systems, Inc. Ascend Technical Manual F.01U.196.221 Rev.
CHAPTER 5 Wiring Diagrams FIGURE 24. Dual Plug Wiring Diagram FIGURE 25. 5-Pin XLR (male) Wiring Diagram Bosch Security Systems, Inc. Technical Manual F.01U.196.221 Rev.
Wiring Diagrams FIGURE 26. Ascend Music/Entertainment Module Connector Wiring Diagram Bosch Security Systems, Inc. Technical Manual F.01U.196.221 Rev.
CHAPTER 6 Specifications Specifications Headset XLR panel power / input power 6mA @ 28Vdc Speaker Frequency Response ±6dB, 350Hz - 3kHz Distortion <10% @ 110dB SPL, 350Hz - 3kHz Sensitivity 90 ±5dB SPL/mW (standard volume setting) Impedance at Plug 600 ±20% Overload 300mW @ 1kHz, 8hr Acoustic Quality No spurious sounds with 10mW to speaker, 350Hz - 6kHz Headsets and Handsets with Active Circuits Meets speaker requirements with ANR on or off. Microphone Frequency Response 100Hz - 10kHz per DO-214 fig.
Specifications Ascend Insulation Resistance >10M between exposed materials and electrical circuit Cord Flexibility No damage when coiled Connector Flexibility >25,000 cycles Pullout Strength >10kg Drop Resistance No failures after 12 drops from 1m onto concrete floor Final Distortion Meets mic and speaker distortion requirements after applicable environmental tests of DO-160 Noise Reduction (where applicable) Up to 12dB noise reduction between 100Hz to 2000kHz Receives power from boom microphone conne
CHAPTER 7 Troubleshooting and FAQs PROBLEM SOLUTION My ANR (Active Noise Reduction) is no longer working. • • Verify the headset is plugged in. • If using a battery, verify the battery is charged. • If you have verified the previous bullets, then send the unit in for repair. My headset does not work with my cell phone or MP3 player. • Verify the cord for the device is plugged in firmly. I need parts for my headset. • Contact technical support for the part number you are looking for.
Troubleshooting and FAQs Ascend Available Accessories Ear Cushion, Pair ......................................................................................................................................................................... PRD000253000 Microphone Windscreen.............................................................................................................................................................. PRD000253001 Headband Pad ..............................................
Ascend Bosch Security Systems, Inc. Troubleshooting and FAQs 41 Technical Manual F.01U.196.221 Rev.
Bosch Security Systems, Inc. Telex Headsets Phone: 1.800.898.6723 (technical support) Email: repair.lincoln@us.bosch.com Website: www.telex.
