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®
Tele x
User Instructions
Stratus 50 Digital
Active Noise Reduction Headset
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The Stratus 50 Digital provides the best noise reduction available on the market. Detented Sliders Replaceable Adjust to Wide Head Pad Any Size Head Earcups Pivot on Patented Two Planes to Tension Conform to Adjust Knob Wearer (Comfort tm Cam ) Replaceable Ear Cushions Ball and Socket Jointed Boom Rotates Noise Canceling Overhead for Mic Flexible Boom Permits Electret Microphone Placement on Either Precise Mic Placement Side of Head Figure 1 Stratus 50 Digital Reference View This device complies
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General Description The Telex Stratus 50 Digital is a medium-weight, active noise-reduction headset with boom-mounted microphone. It provides up to 25+dB patented digital tonal noise reduction of engine and blade noise, up to 15+dB of analog broadband noise reduction, and 29+dB of passive noise reduction. At 90 Hz the accumulative total is 50+dB of noise reduction - the best in the marketplace. Design Features (See Figure 1) Fit and Comfort The Stratus 50 Digital incorporates unique features th
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Auto Shut-Off The Stratus 50 Digital contains noise-sensing features to measure ambient noise levels. When ambient noise levels are low for 5 to 7 minutes continuously, the headset automatically shuts off. This feature will prolong battery life and prevent discharge of batteries if the headset is accidentally left on after use. Cellphone / audio interface The Stratus 50 Digital includes a unique amplified interface allowing for the connection of a cellular telephone and an audio input simultan
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Headset Power The headset will operate with either 4 AA batteries or panel power from 8-32 Vdc. Panel Power Option An optional power cord is provided for use in negative ground electrical systems only. Do not attempt to use with positive ground electrical systems. The power cord is designed to connect the battery module to the aircraft power via the cigarette lighter jack. Power Cord 0 45 Locking Figure 2 Panel Power Option Battery Power The battery module requires 4 AA batteries. Alkaline bat
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Headset Operation (cont.) 2. Connect the headset as shown in Figure 4. If using the standard version, set the stereo/mono headphone switch to match the type of sound system in your aircraft. If the headset is set for stereo and the intercom is set for mono, sound will only come out of one earcup. Mute Switch To Radio Microphone “IN” Jack Cell Phone Jack Auxilary Jack To Radio Receiver “OUT” Jack Stereo/Mono Switch Figure 4 Headset Connections 3. Connect cellular telephone and/or audio input de
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Headset Operation (cont.) 8. With the headband resting securely on the top of the head, check that the ear cups are centered over the ears. Reposition them if necessary by moving the headband sliders up or down (See Figure 9 on the next page). Proper performance depends on proper fit of the headset as described below. 9. Headband Pressure Adjustments: There are three pressure settings. Increasing the pressure will improve the seal between the earcup and the head for greater noise reduction. To c
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Headset Operation (cont.) 10. Headband Size Adjustment To adjust the headband size, move the earcup sliders up or down on the headband (Figure 9). Size is properly adjusted when the earcups are centered over the ears. It is important to make the same adjustments on both sides of the headband the same to keep the headband and pad properly centered on the head. Figure 9 Headband Size Adjustment 11. Volume Adjustment When the microphone is worn on the left side, volume is increased by rotatin
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Stratus Controls Power Switch the ON/OFF button to turn the Stratus on or off. Green LED indicates power on. Low Battery Red LED indicates 20 percent or less battery life remaining. Figure 11 Stratus Battery Box Microphone Gain Adjustment The microphone gain has been factory-adjusted to the nominal level required for aviation use, and it should normally not require readjustment. Any changes to the mic gain should be done by a qualified avionics technician. To access the gain trimmer, insert a s
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Wiring Diagram .206 DIA. MICROPHONE PLUG MIC + RED MIC - BLK SHLD .250 DIA. SPEAKER PLUG SPKR - L BLUE RED SPKR - R WHITE BLK SHLD SPKR - GND Figure 13 Standard Version Page 8
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Specifications Receivers: Type: Dynamic Frequency Response: 50 Hz - 10 kHz Sensitivity: 95 ± 5 dB SPL (1 kHz, 1 mW input) Impedance (Max. Volume): Stereo.........................................300 ohms per side Monaural...................................................150 ohms Headset Power: 4AA Batteries or Panel Power from 8-32 Vdc Microphone: Element Type: Amplified noise-canceling electret Frequency Response: 100 Hz - 3.5 kHz Sensitivity: -50 ± 6 dB (ref: 1V/ µbar at 1 kHz with 12 Vdc supp
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Ordering Information Stratus Headset, with electret mic, battery module, and carrying case (Dark Grey/Black) Catalog no. PRD000010000 Aircraft Power Cord ........................................................ Catalog no. 550216001 1” Foam-filled ear cushions (package of 2) ................. Catalog no. 800456021 Headband Pad .............................................................. Catalog no. 800456017 Replacement electret microphone ............................... Catalog no. 800136100
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TELEX COMMUNICATIONS, INC. - LIMITED WARRANTY Uniform Limited Warranty: Telex branded products are warranted by Telex Communications, Inc. against malfunction due to defects in materials and workmanship for a specified period, as noted in the individual product line statements below, beginning with the date of original purchase by the end-user. If such malfunction occurs during the specified period, the product will be repaired with new or remanufactured equivalent parts and products or replaced
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CUSTOMER SERVICE For information or technical assistance, call, write, or email Telex at: Customer Service Department Telex Communications, Inc. 12000 Portland Ave. So. Burnsville, MN 55337 U.S.A. (952) 884-4051 www.telex.com/aircraft When returning equipment for repair, please enclose an explanation of the problem. And, if the equipment is covered under warranty, please enclose a copy of your proof of purchase. The equipment must be accompanied by documentation stating your name, return address
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Notes Page 13
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LIT000010 Rev A www.telex.com/aircraft 04/2006
