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Telex 50-D manual

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The rules should oblige the seller to give the purchaser an operating instrucion of Telex 50-D, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.

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The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Telex 50-D one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.

Unfortunately, only a few customers devote their time to read an instruction of Telex 50-D. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.

What should a perfect user manual contain?

First and foremost, an user manual of Telex 50-D should contain:
- informations concerning technical data of Telex 50-D
- name of the manufacturer and a year of construction of the Telex 50-D item
- rules of operation, control and maintenance of the Telex 50-D item
- safety signs and mark certificates which confirm compatibility with appropriate standards

Why don't we read the manuals?

Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Telex 50-D alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Telex 50-D, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Telex service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Telex 50-D.

Why one should read the manuals?

It is mostly in the manuals where we will find the details concerning construction and possibility of the Telex 50-D item, and its use of respective accessory, as well as information concerning all the functions and facilities.

After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.

Table of contents for the manual

  • Page 1

    User Instructions Te l e x ® Stratus 50-D Active Noise Reduction Headset[...]

  • Page 2

    Flexible Boom Permits Precise Mic Placement Earcups Pivot on T wo Planes to Conform to Wearer Replaceable Wide Head Pad Patented Ball and Socket Jointed Boom Rotates Overhead for Mic Placement on Either Side of Head Figure 1 Stratus Reference View Noise Canceling Electret Microphone Patented T ension Adjust Knob (Comfort Cam tm ) Detented Sliders A[...]

  • Page 3

    Page 1 General Description The T elex 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 accumulati[...]

  • Page 4

    Microphone Bias V oltage 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[...]

  • Page 5

    Page 3 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. 2. Rotate the entire boom overhead to wear the microphone on either the right or lef[...]

  • Page 6

    Page 4 Figure 8 Headband Pressure Adjustment HIG H MED IUM LOW KNOB ADJUSTMENT SETTI NGS 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). Proper performanc[...]

  • Page 7

    Page 5 9. V olume Adjustment When the microphone is worn on the left side, volume is increased by rotating the top of the volume controls toward the front of the head. Control operation is reversed when the microphone is worn on the right side (Figure 10). Headset Operation (Cont.) 8. Headband Size Adjustment T o adjust the headband size, move the [...]

  • Page 8

    Stratus Controls Power Switch the ON/OFF button to turn the Stratus on or of f. Green LED indicates power on. Low Battery Red LED indicates 20% or less battery life remaining. Figure 1 1 Stratus DSP Controller MIC GAIN ADJUSTMENT ACCESS Microphone Gain Adjustment The microphone gain has been factory-adjusted to the nominal level required for F AA c[...]

  • Page 9

    Figure 13 Wiring Diagram for Fixed-Wing V ersion RED BLK SHLD . 2 0 6 DI A. MI CROPHONE P L UG RED BLK SHLD . 25 0 DI A. SPEAKE R PL UG SPKR - L SPKR - R SPKR - GND MI C + MI C - Ear Cushion Replacement T o remove an old ear cushion, simply grasp it and pull it off the earcup. T o install a new ear cushion, start at the top of the earcup. Place the[...]

  • Page 10

    Page 8 Specifications Receivers: T ype: Dynamic Frequency Response: 50 Hz - 10 kHz Sensitivity: 95 ± 5 dB SPL (1 kHz, 1 mW input) Impedance (Max. V olume): Stereo.........................................300 ohms per side Monaural...................................................150 ohms Headset Power: 4AA Batteries or Panel Power from 8-32 Vdc Mi[...]

  • Page 11

    Page 9 ORDERING INFORMA TION Stratus Headset, with electret mic, battery module, and carrying case . ............................................. Catalog no. 301 125-000 Aircraft Power Cord ............................................ Catalog no. 550216-001 1” Foam-filled ear cushions (package of 2) ......... Catalog no. 800456-015 Headband Pad [...]

  • Page 12

    Page 10 LIMITED W ARRANTY — V ALID ONL Y IN UNITED ST A TES AND CANADA TELEX Communications, Inc. (“T elex”) warrants to the user , who originally purchased the product delivered with this card, that the product will be free from defects in material and workmanship for the following periods after such date of purchase: Material 36 months, wor[...]

  • Page 13

    Page 1 1 CUSTOMER SER VICE For information or technical assistance, call or write to T elex at: Customer Service Department T elex Communications, Inc. 12000 Portland Ave. So. Burnsville, MN 55337 U.S.A. (952) 884-4051 When returning equipment for repair , please enclose an explanation of the problem. And, if the equipment is covered under warranty[...]

  • Page 14

    Notes[...]

  • Page 15

    Notes[...]

  • Page 16

    381 10-073 Rev D 7/02[...]