Telex STRATUS Stratus 50-D User Instructions

Telex STRATUS Stratus 50-D User Instructions

Active noise reduction headset
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Telex
®
User Instructions
Stratus 50-D
Active Noise Reduction Headset

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Summary of Contents for Telex STRATUS Stratus 50-D

  • Page 1 Telex ® User Instructions Stratus 50-D Active Noise Reduction Headset...
  • Page 2 Replaceable Wide Head Pad Detented Sliders Adjust to Any Size Head Earcups Pivot on Two Planes to Conform to Patented Wearer Tension Adjust Knob (Comfort Flexible Boom Permits Precise Mic Placement Replaceable Ear Cushions Noise Canceling Patented Ball and Socket Electret Microphone Jointed Boom Rotates Overhead for Mic...
  • Page 3: General Description

    The Telex Stratus 50-D is a medium-weight, active noise-reduction headset with an amplified, noise-canceling, electret microphone. It provides up to 25+dB 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.
  • Page 4: Microphone Bias Voltage Requirements

    Microphone Bias Voltage Requirements The boom microphone operates on a voltage of 8-16 VDC. Output voltage is 50 ohms (Designed for radio input impedances from 50-600 ohms). If you are uncertain whether your avionics equipment meets this requirement, consult the avionics equipment manufacturer. Headset Power The headset will operate with either 4 AA batteries or panel power from 8- 32 Vdc.
  • Page 5: Headset Operation

    Headset Operation 1. Connect the headset as shown in Figure 4. Set the MONO/STEREO 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.
  • Page 6 Headset Operation (Cont.) 6. 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).
  • Page 7 Headset Operation (Cont.) 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 adjust both sides of the headband the same to keep the headband and pad properly centered over the head.
  • Page 8: Microphone Gain Adjustment

    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% or less battery life remaining. Microphone Gain Adjustment The microphone gain has been factory-adjusted to the nominal level required for FAA certification, and it should normally not require readjustment.
  • Page 9: Ear Cushion Replacement

    Ear Cushion Replacement To remove an old ear cushion, simply grasp it and pull it off the earcup. To install a new ear cushion, start at the top of the earcup. Place the flap on the back of the ear cushion over the lip along the top of the earcup. Then, pull the bottom of the ear cushion down over the lip at the bottom of the earcup.
  • Page 10: 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 and Amplifier: Element Type: Noise-canceling electret Frequency Response: 100 Hz - 3.5 kHz...
  • Page 11: Ordering Information

    ORDERING INFORMATION Stratus Headset, with electret mic, battery module, and carrying case ..Catalog no. 301125-000 Aircraft Power Cord ... Catalog no. 550216-001 1” Foam-filled ear cushions (package of 2) ... Catalog no. 800456-015 Headband Pad ... Catalog no. 800456-017 Replacement electret microphone ...
  • Page 12 Material 36 months, workmanship 36 months. Telex will, at its option, repair or replace, free of charge, such defective products subject to the following conditions: 1.
  • Page 13: Customer Service

    Non-Warranty Repairs - Equipment that is not under warranty must be sent prepaid to Telex. If requested, an estimate of repair costs will be issued prior to service. Once your approval for repair, and repair of equipment is completed, the equipment will be returned on a collect basis.
  • Page 14 Notes...
  • Page 15 Notes...
  • Page 16 38110-073 Rev D 7/02...

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