Telex US2000A User Manual

Telex

User Instructions

Volume

Panel Mic

Headset

AllTalk

US2000A

Listen

Call

Listen

Talk

Call

Mic Kill

Talk

Model US2000A Intercom User Station

Audiocom

Intercom Systems

FCC Statement

This equipment uses and can radiate radio frequency energy that may cause interfer ence to radio communications if not installed in accordance with this manual. The equipment has been tested and found to comply with the limits of a Class A comput ing device pursuant to Subpart J, Part 15 of FCC Rules which are designed to pro vide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area may cause interfer ence which the user (at his own expense) will be required to correct.

This product meets Electromagnetic Compatibility Directive 89/336/EEC.

Introduction

Thank you for purchasing the Audiocom US2000A Intercom User Station. We hope the many design features of this product will satisfy your intercommunication requirements for many years to come. To get the most out of your new intercom station, please take a few moments to look through this booklet before using the US2000A for the first time.

Table of Contents

Description ...............4

Features ................5

Installation ...............6

Unpacking ..............6

Configuration Pre-check ...........6

Mounting Configurations ...........11

Connections..............12

Cables ...............13

Power-Up Check ............27

Test Tone ..............27

Sidetone Adjustment ............27

Voice-Activated Microphone (Vox) Setup .......29

Operation ...............31

Normal vs Programming Mode .........31

Volume Adjustment ............31

Receiving Calls .............31

Calling an Intercom Channel ..........32

Microphone Mute During Talk .........32

All Talk ..............32

Public Address (PA) ............33

Turning the Program Inputs On and Off .......33

Using Mic Kill .............33

Using Voice-Activated Microphone (Vox) .......34

Incoming Call Beep On/Off ..........34

Specifications ..............35

Factory Service and Parts Information .........38

Quick Reference..............39

Description

The US2000A Intercom User Station is designed for stationary use by personnel who

may require selective access to two or more intercom channels. It can be rack

mounted or used as a desktop station. For rack mounting, optional hardware is re

quired. For desktop use, four rubber feet are supplied.

The US2000A can be used as a simple, multi-channel user station. Typically, in this

application, no program sources or public address output are connected, and some

advanced features can be disabled: the station simply provides talk, listen and call

capability for a single user. Alternatively, the US2000A can function as a master sta

tion. In this configuration, most or all advanced features are activated. Also, program

inputs and a public address output may be connected. This configuration is ideal for

command and control personnel such as directors, supervisors, etc.

The basic US2000A can communicate with two intercom channels. This number can

be increased by connecting optional ES4000A Expansion Stations. Each ES4000A

adds four additional channels, and up to four of these expansion stations can be con-

nected for a total of eighteen channels.

US2000A

Volume

Vox

Panel Mic

Headset

Mic Kill

All Talk

Listen Listen

Call Call

Tal k Tal k

PGM 1

CHN 1

PUSH

VOL

PGM 2

VOL

CHN 2

PROGRAM

INPUTS

12-15 VDC

SPEAKERS

LINE LEVEL

1VRMS

EXP

P.A .

OUT

BAL - OUT UNBAL - IN

Figure 1. US2000A Reference View (See numbered features, page 5)

PUSH

Features

1. Dynamic-Mic Headset Connector: Accepts headsets with monaural headphones and ei ther a balanced or unbalanced dynamic microphone.

2. Panel Mic / Electret-mic Headset Connector: Accepts an electret gooseneck microphone, such as the Telex Model EGM-12N or EGM-18N, or a monaural, electret-mic headset.

3. Volume Control: Adjusts headphone volume only. If an external speaker is used, volume is adjusted at the speaker.

4. Vox Trimmers: Used with the voice-activated microphone feature. Separate trimmers adjust the voice activation level for the headset and panel microphones.

5. Headset and Panel Mic Keys: Used to manually activate either the headset or panel micro phone, whichever is being used.

6. All Talk Key: Used to talk to all stations that are listening on all channels. This includes both US2000A channels and all channels of any connected ES4000A Expansion Stations.

7. PA Key: If the US2000A is connected to a public address system, this key may be used to talk over the public address system.

8. Mic Kill Key: Used to turn off the microphones on any intercom stations on a channel. Also used to activate the program inputs and the audible beep feature for incoming calls.

9. Intercom Talk Keys: Momentary or latching (hands-free) operation possible.

10. Call Keys: Used to place calls on intercom channels and to indicate incoming calls.

11. Intercom Listen Keys: Momentary or latching operation possible.

12. Program Inputs Connector and Trimmers: Each intercom channel has its own program in put and level adjust trimmer. The program inputs may be turned on or off via the front panel, and they may be set to interrupt during talk if desired.

13. Local Power Jack: An optional PS-L local power supply can be connected to power the US2000A from an AC outlet instead of from the intercom channels.

14. PA Output: Connects to a public address system.

15. Expansion Out Connector: Connects to an ES4000A Expansion Station.

16. Speaker Output Jacks: A single powered loudspeaker or dual powered loudspeakers may be connected for monaural or binaural listening.

17. Intercom Channel Connectors and Audiocom / Clear-Com* Selector Switch: Two connec tors are provided for each channel for loop-through connection of multiple intercom sta tions. The selector switch sets the US2000A for compatibility with either Audiocom or Clear-Com channel connector pin-outs, channel power requirements, and call signaling re quirements.

* Brand names mentioned are the property of their respective companies.

Installation

Unpacking

The package contains the following items. Contact the shipper or your Audiocom dealer immediately if anything is damaged or missing. Detach and fill out the regis tration card and return it to Telex to properly register your US2000A.

Quantity Description

1 US2000A Intercom Station 1 Warranty and registration card 1 User Manual 4 Rubber feet for desktop use of the US2000A 1 Termination plug for special applications (Figure 13

, page 24)

Configuration Pre-check

Before connecting the US2000A make sure that it is properly configured for your intended usage. Figure 2

shows the locations of the configuration jumpers and switches. To access internal switches and jumpers, remove one screw from the top cover and three screws from each side. Note that switch SW2 can be accessed through the back panel.

If you change any switch settings while the US2000A is operating, you must

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perform a reset: either cycle power off then on, or simultaneously press the All Talk and Listen 1 keys, then release them. The sidetone controls are adjusted after power-up and are normally accessed through the bottom cover.

Channel 2 Sidetone

SW1

1 2 3

SW3

Channel 1 Sidetone

SW2

Figure 2. Locations of Configuration Jumpers and Switches

Table 1. Configuration Switch Settings

Switch

Description Settings Default

Number

DIP Switch SW1 (Internal)

SW1-1 Headset microphone type

SW1-2 Call signal send, channel 1

SW1-3 Call signal receive, channel 1

SW1-4 Call signal send, channel 2

SW1-5 Call signal receive, channel 2

SW1-6 Mic kill signal send

SW1-7 Program 2 interrupt

SW1-8 Program 1 Interrupt

Push-button Switch SW2 (BAL-UNBAL Switch on Back Panel)

Audiocom or Clear-Com

operation

DIP Switch SW3 (Internal)

On: Unbalanced Off: Balanced (Typical)

On: Enabled Off: Disabled

On: Interrupt during talk Off: No Interrupt

Out: Audiocom (Balanced) In: Clear-Com (Unbalanced)

Setting

Off

Out

SW3-1 Incoming call beep, headset

SW3-2* Listen 1 to speaker 1 only

SW3-3 Incoming call beep, speaker 1

SW3-4 Incoming call beep, speaker 2

SW3-5* Listen 2 to right headphone

SW3-6* Listen 2 to speaker 2

SW3-7* Listen 2 to speaker 1

SW3-8* Listen 1 to left headphone

* Set all to monaural or all to binaural. Do not mix settings.

On: Disabled Off: Enabled

On: Enabled (Binaural) Off: Disabled (Monaural)

On: Enabled (SW3-1 must be off) Off: Disabled

On: Enabled (Monaural) Off: Disabled (Binaural)

On: Enabled (Binaural) Off: Disabled (Monaural)

On: Enabled (Monaural) Off: Disabled (Binaural)

Off

Headset Microphone Type Selection DIP Switch

SW1-1 applies only to a dynamic-mic headset connected to the dynamic-mic headset jack on the front panel. If the headset specifications indicate the microphone type is balanced, or if you are unsure, leave this switch in the off (default) position. If the specifications indicate an unbalanced microphone set SW1-1 to on.

For best results in noisy environments, a noise canceling (directional or

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cardioid) microphone is highly recommended. This is especially true if you are using the vox feature.

Mic Kill Send Enable DIP Switch

The US2000A can generate an inaudible signal which will turn off the microphones on all intercom stations on a channel (for stations that detect this signal). This feature is useful, for example, when an unattended microphone has been left on and is causing unnecessary noise on a channel. By default, Mic Kill is not enabled. To activate this feature set SW1-6 to the on position.

Program Interrupt DIP Switches

If you plan on using external program sources with the US2000A, you have a choice of whether or not you want the program audio to shut off on the intercom channel while you are talking. By default, program audio does not interrupt during talk. You can change this as follows:

1. For channel 1 program interrupt during talk, set SW1-7 to on .

2. For channel 2 program interrupt during talk, set SW1-8 to on .

Incoming Call Beep DIP Switches

If call signal receive is enabled (switches SW1-3 and SW1-5), incoming calls will be indicated by red-flashing Call keys. An optional beep tone can also be used. Internal switches enable the beep tone. You can then turn the beep tone on or off via the front panel during normal operation. Enable the beep tone as follows:

1. Make sure the call signal receive DIP switches are on (SW1-3 and SW1-5).

2. For incoming call beep in a headset, set SW3-1 to off.

3. For incoming call beep in speaker 1, set SW3-1 to off and SW3-3 to on.

4. For incoming call beep in speaker 2, set SW3-1 to off and SW3-4 to on.

5. The procedure to turn incoming call beep on or off during operation can be found on page 34

Monaural or Binaural Operation DIP Switches

The US2000A can be used with a single speaker or monaural headphones (single- or double-sided) for monaural operation. In this case, all audio signals are combined and sent to the headphones and the Speaker 1 jack on the back panel. The US2000A can also be used with two speakers for binaural operation. In this case, channel 1 is sent to the Speaker 1 jack and channel 2 is sent to the Speaker 2 jack. Binaural headphone operation is not supported.

For monaural operation with headphones or one speaker (factory default):

1. Set SW3-2 to off.

2. Set SW3-5 to on.

3. Set SW3-6 to off.

4. Set SW3-7 to on.

5. Set SW3-8 to on.

For binaural operation with 2 speakers:

1. Set SW3-2 to on.

2. Set SW3-5 to off.

3. Set SW3-6 to on.

4. Set SW3-7 to off.

5. Set SW3-8 to off.

Balanced/Unbalanced Switch (SW2)

This switch is set at the factory to the balanced (BAL) position for use with Audio com intercom channels. Set the switch to the unbalanced (UNBAL) position for use with a Clear-Com intercom system.

Direct Program Listen Enable / Disable Jumpers

By default, each US2000A program input can be heard by all intercom stations that are listening on the corresponding intercom channel. This includes the US2000A. (Program input routing to the intercom channels can be turned on or off via the US2000A front panel programming. See "Turning the Program Inputs On and Off", page 33

.) Additionally, all program signals can be routed directly to the US2000A speaker or headset. This lets the US2000A operator hear the program inputs even if they are not being routed to the intercom channels. To disable direct program listening in the speaker or headset for one or more program inputs, reset the appropriate jumper as shown in Table 2

Table 2. Direct Program Listen Enable / Disable Jumpers

Jumper Description Settings for Jumpers J3 Program 1 direct to Headset or Speaker J6 Program 2 direct to Headset or Speaker

Pins 2&3 Shorted: Enable Pins 1&2 Shorted: Disable

Mounting Configurations

The US2000A can be used on a desktop, or it can be rack mounted. For desktop use, install the 4 rubber feet supplied with the US2000A. For rack mounting, use optional Audiocom RMK Rack Mount Kits (Figure 3).

You will have to perform the sidetone adjustment (page 27) after all compo

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nents are connected. However, when the US2000A is rack mounted, you may not be able to access the sidetone trimmers. In this case, you can position the US2000A in the rack and make all required connections. Then, adjust the sidetone trimmers before installing and tightening all rack mount screws.

RMK-S Single-Unit Rack Mount Kit

for one 1/2-rack wide Audiocom component*

RMK-D Dual-Unit Rack Mount Kit

for two 1/2-rack wide Audiocom components*

RMK-M Multi-Unit Rack Mount Kit

for mixed 1/2-rack and 1/4-rack wide Audiocom components*. Mounts one 1/2-rack wide unit with 1/4-rack wide components, or 3 1/4-rack wide components.

* 1/2-rack wide components: US2000A, ES4000A, PS2000L, SPS2000A,

PS4000, PS-X, SPK-2000.1/4-rack wide components: SPK-1000

Figure 3. Audiocom RMK Rack Mount Kits

Connections

Central Master Station vs Remote Station

The US2000A can be used in a variety of configurations as a speaker station or as a headset station. Additionally, it can be used as a central master station or as a remote station. When used as a central master station, the US2000A is placed in the same lo cation as the system power supplies, and if an SPS2000A power supply is used, the US2000A can take advantage of the SPS2000A built-in speaker for speaker output. When used as a remote station, the US2000A is not at the same location as the power supplies, and if it is being used as a speaker station, a separate speaker must be sup plied. Figures 4 the US2000A when used as a central or remote headset or speaker station.

All Locally Powered Stations

Any US2000A can be locally powered by connecting a PS-L Local Power Supply. This is shown as an option in Figures 4 system where all stations are powered from local power supplies, with no central power supply. This is illustrated in Figure

External Program Input and PA Output

Connections for external program input and PA output are shown in Figure 14

ES4000A Expansion Station Connection (Optional Component)

through 12, starting on page 15, illustrate several configurations for

through 12. A special case is an intercom

13, page 24.

, page 25.

Refer to the ES4000A User Instruction Manual for detailed connection information.

+ 28 hidden pages

Telex US2000A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual