Telex US2002 Multichannel Audiocom User Station

Telex US2002
Multichannel Audiocom User Station

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Telex US2002

The US-2002 is a simple, multichannel user station. It provides you with talk, listen, and call capabilities. You simply plug it into any AC power outlet from 100 - 240 vlots, add a microphone or headset, connect intercom stations to the back panel, and you're ready to communicate. Combine the US-2002 with different types of power supplies to create various Master Station configurations. The US-2002 can operate in an unbalanced mode to make it completely Clear-Com® compatible.

Features

• Speaker Station or Headset Station

Use the built-in speaker for listening and add an optional Telex MCP-90 series Gooseneck Panel Microphone for talk-back. Or, turn off the speaker volume, and plug in any of a variety of Telex headsets for private communication.

• Voice Activated Microphone (VOX)

Separate controls adjust the voice activation level for the headset microphone and panel microphone inputs.

• Public Address (PA) Output, with PA key

Use your intercom microphone to talk over a PA system.

• Back-lit Keys

Improves visibility in low-light.

• Incoming Call Indications

Red flashing call light, with beep tone if desired.

• Mic Kill Key

You can turn off all microphones on a channel to quickly clear the channel.

• Program Input for Each Channel

Connect any line-level audio source for monitoring in the speaker or headset, or for routing to the intercom channel. The program audio to the channel can be set to interrupt while the US2002 operator is talking on the channel.

• Expandable

Add more channels by connecting optional ES4000A Expansion Stations. Each ES4000A adds four additional channels (up to eighteen channels).

• Clear-Com® Compatible.

Specifications

Power Requirement

Phantom Power: 24 VDC nominal
Local Power: 12 to 15 VDC, 65 to 150 mA

Dimensions (H x W x D): 1.75" x 8.25" x 10.31" (44.5 x 209.5 x 261.9 mm)
Weight: approx. 2 lbs (0.9 kg)
Environmental Requirements

Storage: -20° to 80° C; 0-95% humidity, non-condensing
Operating: -15° to 60° C; 0-95% humidity, non-condensing

Dynamic-mic Headset

Microphone: 50 to 200 ohm, dynamic (balanced or unbalanced)
Headphones: 150 to 600 ohm, monaural
Connector Type: XLR-4M

Pin 1: Microphone low
Pin 2: Microphone high
Pin 3: Headphone high
Pin 4: Headphone low

Panel Microphone or Electret-mic Headset

Microphone: 5k ohm, electret (-57 dB)
Headphones: 150 to 600 ohm, monaural
Connector Type: MCP-90, stereo plug with threaded shaft connector

Program Input

Input Level: 100mV maximum
Voltage Gain: 25 +/-3dB
Output Level: 1.0 Vrms nominal, 2.3 Vrms maximum
Input Impedance: 75k ohms
Common Mode Rejection: Greater than 50 dB
Connector type: DB9F

Pin 1: Ground
Pin 2: Program 1 input low
Pin 3: Program 2 input low
Pin 4: NC
Pin 5: NC
Pin 6: Program 1 input high
Pin 7: Program 2 input high
Pin 8: NC
Pin 9: NC

Intercom Channels, Balanced Mode (SW2 set to BAL position)

Output Level: 1 Vrms nominal
Input Impedance: 300 ohms
Bridging Impedance: Greater than 10,000 ohms
Sidetone: -40 dB, 35 dB adjustable range
Call Signaling

Send: 20 kHz +/-100 Hz, 0/5 Vrms +/-10%
Receive: 20 kHz +/-800 Hz, 100 mVrms

Mic-Kill Frequency

Send: 24 kHz +/-300 Hz, 0.5 Vrms +/-10%
Detect: 24 kHz +/-800 Hz, 100 mVrms

Common Mode Rejection Ratio: Greater than 50 dB
Connector Type: One XLR-3M and XLR-3F pair, wired in parallel, for each channel

Pin 1: Common
Pin 2: +30 VDC input
Pin 3: Intercom audio high

PA Output

Output Level: 235 mVrms nominal
Connector Type: 1/8" Stereo Phone Jack

Tip: PA output high
Ring: Not used
Sleeve: Common

Speaker Output

Output Level: 0 dB nominal (1.0 Vrms max)
Output Impedance: 1000 ohms nominal
Frequency Response: 200 Hz to 8 kHz +1/-3dB
Connector Type: RCA Phono Jack

Tip: Speaker output high
Sleeve: Common

Expansion Input/Output

Type: 0 dB nominal (1.0 Vrms max)

Tip: Talk output
Ring: Listen input
Sleeve: Common

External Power

Type: 2.0 mm power jack

Internal pin: positive (+)
External shell: negative (-)

Headphone Amplifier

Voltage Gain: 30 +/-3dB
Maximum Output: 250 mW +/-10% into 150 ohms, 65 mW +/-10% into 600 ohms
Frequency Response: 200 Hz to 8 kHz +1/-3 dB
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 Gain

Mic to CHN: 25 +/-3dB, before limiting
Mic to Headphone: adjustable, 45 dB +/-10% maximum, into 150 ohms
Mic to PA: 15 +/-3dB, 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

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