Telex US2002 manual External Power, Headphone Amplifier, Panel Microphone Amplifier

Page 36

External Power

Type: 2.0 mm power jack

Internal pin: positive (+)

External shell: negative (-)

Headphone Amplifier

Voltage Gain: 30 ±3 dB

Maximum Output: 250 mW ±10% into 150 ohms, 65 mW±10% into 600 ohms

Frequency Response: 200 Hz to 8 kHz +1/-3db

Incoming Call Beep Tone: 2 kHz, at the headphones

Total Harmonic Distortion: Less than 0.2% at 200 mW

Sidetone: 18 ±2 dB, adjustable

Panel Microphone Amplifier

Voltage Gains:

Mic to CHN; 25±3 dB, before limiting

Mic to Headphone; adjustable, 45 dB ±10% maximum, into 150 ohms Mic to PA; 15 ±3 dB, 235 mVrms ±10%

Frequency Response: 200 Hz to 8 kHz +1/-3dB

Total Harmonic Distortion: Less than 0.2% at CHN output

VOX Range: -75 to -30 dB, -60 dB factory set

Intercom User Station US2002 - 36

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Contents Telex Page FCC Statement Table of Contents Index of Figures Introduction US2002 Reference View See numbered features, Features Configuration Pre-check UnpackingConfiguration Switch Settings Headset Microphone Type Selection DIP Switch Jumper Description Setting for Jumpers For binaural operation with 2 speakersMounting Configurations Central Master Station vs Remote StationExternal Program Input and PA Output Intercom User Station US2002 Intercom User Station US2002 Intercom User Station US2002 Intercom User Station US2002 Intercom User Station US2002 Intercom User Station US2002 US2002 Headset Station Configuration with 2 Power Supplies Typical Remote Headset Station Typical Remote Monaural Speaker Station Typical Remote Binaural Speaker Station An example of all locally powered US2002 intercom stations External Audio Input and PA Output Audiocom Intercom Cables Intercom User Station US2002 Power-Up Check Intercom User Station US2002 US2002 Bottom View Normal vs Programming Mode Volume AdjustmentReceiving Calls Microphone Mute During Talk Using Mic Kill General Dynamic-mic HeadsetPanel Microphone or Electret-mic Headset Program InputPA Output Speaker OutputExpansion Input /Output External Power Headphone AmplifierPanel Microphone Amplifier Factory Service and Parts Information Page Quick Reference 9350-7748-000 Rev. A, 1/2003