Telex F.01U.118.742, F.01U.118.743 User manual

Operating Instructions

BP-1002/BP-2002 Beltpacks
Audiocom® Intercom System

93507740000 Rev J 5/2006

Proprietary Notice

The product information and design disclosed
herein were orignated by and are the property
of Telex Communications, Inc. Telex reserves all
patent, proprietary design, manufacturing,
reproduction, use and sales rights thereto, and
to any article disclosed therein, except to the
extent rights are expressly granted to others.

Copyright Notice

Copyright 2006 by Telex Communications, Inc.
All rights reserved. Reproduction, in whole or in
part, without prior written permission from Telex
is prohibited.

Warranty Notice

See enclosed warranty card for further details.

Customer Support

Technical questions should be directed to:

Customer Service Department
RTS/Telex Communications, Inc.
12000 Portland Avenue South
Burnsville, MN 55337 USA
Telephone: [phone]
Fax: [phone]
Factory Service: 800-553-5992

Return Shipping Instructions

to the following address and must include
the Proof of Purchase for warranty repair.
Upon completion of any repair, the
equipment will be returned via United
Parcel Service or specified shipper,
collect.

Factory Service Department
Telex Communications, Inc.
8601 Cornhusker Hwy.
Lincoln, NE 68507 U.S.A.
Attn: Service

This package should include the
following:

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Customer Service Department
Telex Communications, Inc. (Lincoln, NE)
Telephone: [phone]
Fax: [phone]
Factory Service: 800-553-5992

Please include a note in the box which supplies
the company name, address, phone number, a
person to contact regarding the repair, the type
and qunatity of equipment, a description of the
problem and the serial number (s).

Shipping to the Manufacturer

All shipments of product should be made via
UPS Ground, prepaid (you may request from
Factory Service a different shipment method).
Any shipment upgrades will be paid by the
customer. The equipment should be shipped in
the original packing carton. If the original carton
is not available, use any suitable container that
is rigid and of adequate size. If a substitute
container is used, the equipment should be
wrapped in paper and surrounded with at least
four (4) inches of excelsior or similar shock­absorbing material. All shipments must be sent

FCC STATEMENT

This equipment uses, and can radiate
radio frequency energy that may cause
interference 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 computing device pursuant to
Subpart B, Part 15 of FCC Rules which
are designed to provide reasonable
protection against such interference
when operated in a commercial
environment. Operation of this equip­ment in a residential area may cause
interference which the user (at his own
expense) will be required to correct.

15

C61

Sidetone

Mic Gain

Mic Gain

WARNING: IF YOU HAVE A BP-1002/2002 WITH A 9030-7740-XXX CIRCUIT
BOARD, YOU WILL NEED TO OBTAIN

REVISION H

OF THIS USER MANUAL.

INTRODUCTION

The Audiocom®1 BP-1002 and BP-2002 are microprocessor controlled
one- and two-channel intercom beltpacks. An internal switch and jumper
setting allows the units to be used with Clear-Com®2 components, if
desired. Other internal switch and jumper settings allow the unit to be
uniquely configured to the operator’s requirements.

OPERATION

SYSTEM POWER

The BP-1002 / 2002 beltpack receives power externally in one of two
ways:

• The intercom channel

• The local-power (pin 2) of the intercom channel connector

Figure 3. Printed Circuit Board

14

Both the BP-1002 and BP-2002 will pass system power through to
subsequent beltpacks that are “daisy chained” together.

INITIAL BP-1002/BP-2002 SETUP

The channel termination is initially set for balanced operation, which
is compatible with other Audiocom® equipment. If the unit is going to
be connected to Clear-Com equipment, one switch must be changed
as described in the section on Clear-Com Setup in this manual.

The headset microphone type is auto-sensing, which means it
automatically determines if an Electret or Dynamic headset is
attached to the unit.

1. Audiocom® is a registered trademark of Telex Communications, Inc., Burnsville,
Minnesota 55337

2. Clear-Com® is a registered trademark of Clear-Com Intercom Systems

3

APPENDIX A

OPTIONAL FOOTBALL MODIFICATIONS

GENERAL DESCRIPTION

In Audiocom® Intercom Systems, the Mic-Kill feature is used to turn off any activated
microphones on a selected channel. The Mic-Kill feature is activated when the beltpack
receives a 24 kHz signal from the channel. In some applications the Mic-Kill and Call
signal features are not desired and need to be disabled.

ELIMINATING MIC-KILL AND CALL SIGNAL

TO PREVENT DAMAGE TO THE EQUIPMENT, THESE MODIFICATIONS SHOULD ONLY
BE MADE BY QUALIFIED TECHNICIANS.

If desired, the Mic-Kill and Call signal features can be disabled in the BP-2002/BP-1002 by
removing a surface-mounted capacitor from the printed circuit board. Perform the following:

1. Before making changes to the printed circuit board,
disconnect all power and line connections from the beltpack.

2. Refer to Figure 3 and locate C61 on the underside of
the printed circuit board.

3. Remove capacitor C61 from the printed circuit board.

RESTORING MIC-KILL AND CALL SIGNAL

To restore the Mic-Kill and Call signal features, replace C61 with Telex® part number
102881-140, 1500 pF, 50V capacitor.

CAUTION

Figure 1. BP-2002 & BP-1002 Connections and Controls

4

13

SPECIFICATIONS

GENERAL:

Power Requirements:

Channel supplied: 24 VDC nominal, 40 to 100 mA
Local-power: 24 VDC nominal (21 to 30 VDC), 40 to 100 mA

Environmental Requirements:

Storage: -20ºC to 80ºC; 0% to 95% humidity, non-condensing
Operating: -15ºC to 60ºC; 0% to 95% humidity, non-condensing
Dimensions: 5.0" (127 mm) H x 3.5" (88.9 mm) W x 1.8" (45.7 mm) D
Weight: 1.5 pounds (0.68 kg)

INTERFACE REQUIREMENTS:

Headset:

1000 - 3000 ohm electret microphone
50 - 200 ohm dynamic microphone
150 to 600 ohm headphones

Input Level:

4 mVRMS (nominal)

Balanced Intercom Channel:

Output Level: 1 VRMS nominal
Terminating Impedance: 300 ohm ±5%
Bridging Impedance: greater than 10,000 ohm
Call Signalling:

Send: 20 kHz ±100 Hz, 500 mVRMS ±10%
Receive: 20 kHz ±800 Hz, 100 mVRMS

Mic-Off Frequency:

Detect: 24 kHz ±800 Hz, 100 mVRMS
Noise Contribution: less than -60 dBu on the line
Total Harmonic Distotion: less than 1% at channel output for normal input

Unbalanced Intercom Channel:

Output Level: 775mVRMS ±10%
Terminating Impedance: 200 ohm ±5%
Bridging Impedance: greater than 10,000 ohm
Call Signalling:

Send: 12 ±3 VDC on the line

Receive: 4 - 15 VDC from the line
Total Harmonic Distotion: less than 1% at channel output for normal input

HEADPHONE AMPLIFIER:

Maximum Output:

4.5 ±10% VRMS into 150Ω headset

Frequency Response:

200 Hz to 8 kHz ±2 dB

Audible Alert:

1 kHz, at the headset

Total Harmonic Distortion:

Less than 1% at less than 3.5 VRMS into 150Ω headset

Sidetone:

20 ±3 dB minimum range, adjustable

EXTERNAL CONNECTIONS & CONTROLS

NOTE: The numbers refer to the callouts in Figure 1.

1. VOLUME CONTROL: Use this control to adjust the headset listen level.

2. CHAN BUTTON AND INDICATORS: The Chan button (only on the BP-2002) allows the
user to select which intercom channel is active. Press the Chan button to
change the channel selection. The yellow indicator next to the channel number
lights to show the active channel.

3. CALL BUTTON AND INDICATOR: The Call function allows the user to send or receive
signals to other devices on the intercom channel selected. The Call button
operates in two ways:

Call receive

(If Audible Call Alert is enabled, incoming calls will cause beeps in the
headset.) On the BP-2002, calls can be received on the selected
channel only.

Call send

hold the Call button until a verbal response is received. The indicator will
glow red. On the BP-2002, calls can be sent on the selected channel
only.

4. TALK BUTTON AND INDICATOR: The Talk button activates the headset microphone
and operates in two ways:

Latched Mode:
Tap the button once to talk. The indicator will glow green. Tap the button
again when finished with a conversation.

Momentary Mode:
Press and hold the button to talk momentarily. Release the button when
finished talking.

NOTE: On the BP-2002, if no headset is connected when the Talk button is
pressed, the Talk button will have the same function as the Chan button.

5. SIDETONE CONTROL: When using a headset, this control adjusts your own voice
level heard in the headphones. To adjust the level, tap the Talk button once to
turn on the headset microphone. Then, use a small flat-blade screwdriver to
increase or decrease your voice level while talking into the microphone. (This
control is accessible by removing one screw in the belt clip.)

6. HEADSET CONNECTOR: This connector accepts a four-wire Telex® boom­microphone headset.

: When there is an incoming call signal, the indicator is red.

: To send a call signal to all stations on a channel, press and

12 5

7. INTERCOM CHANNEL CONNECTORS: On the BP-2002, intercom channels are
connected via a pair of 6-pin connectors (one male and one female). The male
and female connectors are wired together in parallel, providing a “loop through”
at each connector pin. Use one connector to connect to the intercom
channel. Use the other connector to “daisy chain” a cable to the next beltpack
or other station on the channel.

Local Power Input

Normally the BP-2002 is powered from the intercom system and will turn on
with the intercom system. The BP-2002 beltpack may also be powered from
an optional power supply (21-30 VDC) connected between pin 2 (+) and pin
1 (-) of the intercom channel connector.

8. INTERCOM CHANNEL CONNECTORS: On the BP-1002, the intercom channel is
connected via a pair of 3-pin connectors (one male and one female). The male
and female connectors are wired together in parallel, providing a “loop through”
at each connector pin. Use one connector to connect to the intercom channel.
Use the other connector to “daisy chain” a cable to the next belt pack or other
station on the channel.

CONNECTOR PIN CONFIGURATIONS

Headset Connector

Type: XLR-4M (callout 6 in Figure 1)

Pin 1 Headset microphone low
Pin 2 Headset microphone high
Pin 3 Headphone high
Pin 4 Headphone low

Intercom Channel Connectors
BP-1002

Type: One XLR-3M and XLR-3F pair (callout 8 in Figure 1)

Audiocom® Mode (Internal switch SW1 set to BAL position)

Pin 1 Common
Pin 2 Intercom audio/call low and +24 VDC input
Pin 3 Intercom audio/call high and +24 VDC input

Clear-Com Mode (Internal switch SW1 set to UNBAL position)

Pin 1 Common
Pin 2 +30 VDC input
Pin 3 Intercom audio/call signal

OPERATING MODES

The microprocessor within the BP-1002/BP-2002 controls four modes of
operation that affect the Microphone Kill and Audible Call Alert features. These
modes can be seen in Table 1.

BP-2002

Type: One XLR-6M and XLR-6F pair (callout 7 in Figure 1)

Audiocom® Mode (Internal switch SW1 set to BAL position)

Pin 1 Common
Pin 2 Local power (21-30 VDC)
Pin 3 Channel A intercom audio/call low and +24 VDC input
Pin 4 Channel A intercom audio/call high and +24 VDC input
Pin 5 Channel B intercom audio/call low and +24 VDC input
Pin 6 Channel B intercom audio/call high and +24 VDC input

Clear-Com Mode (Internal switch SW1 set to UNBAL position)

Pin 1 Common
Pin 2 Local power (21 to 30 VDC)
Pin 3 Channel A +30 VDC input
Pin 4 Channel A intercom audio/call signal
Pin 5 Channel B +30 VDC input
Pin 6 Channel B intercom audio/call signal

6

11

Table 2. Internal Switches and Jumpers

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Changing Modes of Operation:

Perform the following steps to change the mode of operation.

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1. Both the Talk and Call indicators should be off and the headset should be connected

2. Press and hold the Talk key, then press and hold the Call key, then release both keys.
The Call indicator should now glow red. (The number of beeps heard in the headset
indicates the current mode of operation.)

3. Press the Call key to change to the next mode of operation. Each press of the Call key
will cause the BP-1002/BP-2002 to change to the next mode of operation.

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4. When the desired mode is reached, press the Talk key to select that mode and exit the
mode changing function. (Beeps will be heard in the headset when the mode changing
function is exited. The number of beeps heard indicates the selected mode of
operation.)

NOTE: Each time the intercom system power is turned on, the beltpack will reset to the
default mode of operation (Mode 2).

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7

INTERNAL SWITCHES, JUMPERS AND ADJUSTMENTS

There are several internal switches, jumpers and adjustments that affect operation. These
are described below. To gain access to the switches, jumpers and adjustments,
disconnect all power and line connections. Remove two screws from the top of each side
and two screws from bottom of each side. Switch, jumper and adjustment locations are
shown in Figure 2.

SW1

JP1

JP3

BAL

UBL

JP2

R145

D

D

R156

U7

Sidetone Adjustment (R145)

The sidetone adjustment is accessible either internally (refer to Figure 2) or by
removing the belt clip mounting screw (callout 5 in Figure 1).

To adjust the level of your own voice heard in the headphones, tap the Talk button once
to turn on the headset microphone. Then, use a small flat-blade screwdriver to
increase or decrease your voice level while talking into the microphone.

Mic Gain Adjustment (R156)

The Mic Gain adjustment is accessible internally on the board (R156) See Figure 2.

To adjust Mic Gain, do the following:
Using a Phillips head screw driver, turn the Mic Gain pot clockwise to increase the gain
(or counter-clockwise to decrease the gain).

Clear-Com Setup

Make the following switch and jumper changes when the belt pack is used with Clear­Com equipment:

BP-1002/2002

1. SW1 must be placed in the UNBAL position.

R13

SW3

SW5

SW4

Figure 2. Internal Switches, Jumpers and Adjustments.

NOTE: Figure 2 shows a BP-2002 with the switches and jumpers in their factory default
positions. SW5 does not exist on the BP-1002 board

The SIDETONE adjustment is also accessible behind the screw that holds the belt clip
(callout 5 in Figure 1).

The functions of the internal switches and jumpers are described in Table 2.

NOTE: On the BP-1002, jumper JP3 must always have pins 2 and 3 shorted.

8

9