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Connection

Using the headset to the aircraft radio or intercom system as shown in Figure 5.

Stereo Mono Switch

This switch is located on the Y-cord (Figure 5). Set the switch to stereo for aircraft 
with a stereo intercom system. Set the switch to mono for monaural intercom systems 
or for direct connection to the aircraft radio.

Cell Phone/Audio Interface

The Echelon 25XT includes a unique amplified interface allowing for the connection 
of a cellular telephone and an audio input simultaneously. This configuration allows 
the user to set up before take-off and eliminates the need to re-configure cords and 
equipment when operating the aircraft.

the other unique feature of this interface is the ability to obtain power from the 
aircraft’s communications system. By amplifying the inputs, the Echelon 25XT 
allows the user to adjust volume level at the headset contributing to the ability to not 
need re-configuring while in flight.

FIGURE 5.

Echelon 25XT Connectors

Summary of Contents for Echelon 25XT

Page 1: ...User Instructions Echelon 25XT Noise Reduction Headset LIT000014 Rev B 6 2009...

Page 2: ...SPECIFICALLYEXCLUDED WITHOUT LIMITATION ARE THE WARRANTIES OF MERCHANTABILITY FITNESS FOR USE OR FOR A PARTICULAR PURPOSE AND WARRANTIES ARISING FROM COURSE OR DEALING OR USAGE OF TRADE OR ANY OTHER M...

Page 3: ...om 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 equipmen...

Page 4: ...6022 Replacement Head Pad 1 590637000 Cord Clip 1 800136100 Microphone Element Assembly 1 800456021 Foam Ear Pads set of 2 1 800456000 Windscreen 1 CME000009000 Carrying Case 1 550216002 Cell Phone Ac...

Page 5: ...dband Pressure Adjustment 5 Left or Right Side Microphone Placement 6 Connection 7 Stereo Mono Switch 7 Cell Phone Audio Interface 7 Volume Adjustment 8 Microphone Gain Adjustment 8 Ear Cushion Replac...

Page 6: ......

Page 7: ...3 FIGURE 1 Echelon 25XT Noise Reduction Headset...

Page 8: ...earcup sliders up or down on the headband Size is properly adjusted when the earcups are centered over the ears It is important to make the same adjustments to both sides of the headband to keep the...

Page 9: ...pressure setting do the following 1 Remove the headset 2 Fold the earcup inward as shown in Figure 3 3 Rotate the Comfort Cam adjustment knob to the desired setting 4 Repeat for both earcups Both sid...

Page 10: ...ophone Placement To adjust the microphone to the left or right do the following 1 Rotate the boom as shown inFigure 4 2 Reshape the boom so the microphone is at the corner of the mouth FIGURE 4 Rotati...

Page 11: ...a unique amplified interface allowing for the connection of a cellular telephone and an audio input simultaneously This configuration allows the user to set up before take off and eliminates the need...

Page 12: ...rmation see the Bosch website www telex com aircraft Volume Adjustment When the microphone is worn on the left side volume is increased by rotating the top of the volume controls clockwise Control ope...

Page 13: ...an old ear cushion do the following Grasp the ear cushion and pull it off the earcup To install a new ear cushion do the following 1 Starting at the top of the earcup place the flap on the back of th...

Page 14: ...Press and release the catch on the microphone element 2 Carefully pull out the element NOTE Avoid pulling the microphone wires 3 Pull the plastic connector housing to unplug the microphone element FIG...

Page 15: ...phone Type Noise canceling electret condenser Output Impedance 50 Ohm Frequency Response 100Hz 3 5kHz Sensitivity 50 6dB ref 1V bar Operating Voltage 8 16Vdc Cords and Plugs Cord 5 5ft 1 7m y cord wit...

Page 16: ......

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