Telex Audiocom BP-1002 User manual

Telex
Operating Instructions
Talk
Call
Chan
1
2
93507740-000 Rev G 05/2005
BP-1002/BP-2002
Belt Packs
Audiocom® Intercom System

2

3
INTRODUCTION
The Audiocom® BP-1002 and BP-2002 are microprocessor controlled one- and two-channel
intercom belt packs. An internal switch and jumper setting allows the units to be used with
Clear-Com®components, if desired. Other internal switch and jumper settings allow the unit to be
uniquely configured to the operator’s requirements.
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.
This product meets the Electromagnetic Compatibility Directive, 89/336/EEC.
®Audiocom is a registered trademark of Telex Communications, Inc., Burnsville, Minnesota 55337
®Clear-Com is a registered trademark of Clear-Com Intercom Systems

4
End-User License Agreement for Telex® Software
IMPORTANT - Please read this document carefully before using this product.
THIS DOCUMENT STATES THE TERMS AND CONDITIONS UPON WHICH TELEX COMMUNI-
CATIONS, INC. (the ‘COMPANY’) OFFERS TO LICENSE THE INSTALLED SOFTWARE OR PRO-
GRAM (the ‘SOFTWARE’) FOR USE WITH THE PRODUCT IN WHICH IT WAS INSTALLED. YOU
ARE AGREEING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT. IF YOU DO NOT
AGREE TO THE TERMS OF THIS AGREEMENT, DO NOT USE THIS PRODUCT. PROMPTLY
RETURN THE PRODUCT TO THE PLACE WHERE YOU OBTAINED IT FOR A FULL REFUND.
The installed software as supplied by the Company is licensed, not sold, to you for use only under
the terms of this license, and the Company reserves all rights not expressly granted to you. You
own the product or other media on or in which the Software is originally or subsequently recorded or
fixed, but the Company retains ownership of all copies of the Software itself.
1. License: This license allows you to use the Software for internal purposes only on a single
product in which it was installed.
2. Restrictions: (a)You may not market, distribute or transfer copies of the Software to others
or electronically transfer or duplicate the software. YOU MAY NOT REVERSE ENGINEER,
DECOMPILE, DISASSEMBLE, MODIFY, ADAPT, TRANSLATE, RENT, LEASE OR LOAN THE
SOFTWARE OR CREATE DERIVATIVE WORKS BASED ON THE SOFTWARE OR ANY ACCOM-
PANYING WRITTEN MATERIALS. (b) The Software and the accompanying written materials are
copy-righted. Unauthorized copying of the Software, including portions thereof or the written materi-
als, is expressly forbidden. (c) You understand that the Company may update or revise the Software
and in so doing incurs no obligation to furnish such updates to you.
3. Limited Warranty: The Company does not warrant that the operation of the Software will
meet your requirements or operate free from error. The Company DISCLAIMS ALL OTHER
WARRANTIES AND CONDITIONS EITHER EXPRESS OR IMPLIED, INCLUDING THE
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-
INFRINGEMENT OF THIRD PARTY RIGHTS.
4. Limited Liability: The liability of the Company for any claims arising out of this License based
upon the Software, regardless of the form of action, shall not exceed the greater of the license fee
for the Software or $50.

5
OPERATION
SYSTEM POWER
The BP-2002 belt pack receives power externally, in one of two ways:
• Via the intercom channel.
• Via the local-power (pin 2) of the intercom channel connector
The BP-1002 belt pack receives power externally, via the intercom channel.
Both the BP-1002 and BP-2002 will pass system power through to subsequent belt packs 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 and several jumpers
must be changed as described in the section on Clear-Com Setup in this manual.
The headset microphone type is initially set for single-ended dynamic operation. To change the microphone
type to balanced dynamic, refer to Table 2 for the position of JP9.
Figure 1. BP-2002 & BP-1002 Connections and Controls

6
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. The yellow indicator next to the 1 or 2 lights to show the active
channel. Press the Chan button to change the channel selection, the yellow indicator for that
channel will light.
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 : When there is an incoming call signal, the indicator is red. (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 : To send a call signal to all stations on a channel, press and 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
head phones. 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 themicrophone. (This control is accessible by removing one screw of belt clip.)
6. HEADSET CONNECTOR: This connector accepts a four-wire Telex® boom-microphone headset.
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
belt pack or other station on the channel.

7
Local Power Input (BP-2002 only)
Normally the BP-2002 is powered from the intercom system and will turn on with the intercom system.
The BP-2002 belt pack may also be powered from an optional power supply (18-30 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.
OPERATING MODES
The microprocessor within the BP-1002/BP-2002
controls four modes of operation that affects the Microphone Kill and Audible Call Alert features.
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Table 1. Operating Modes
Changing Modes of Operation:
Perform the following steps to change the mode of operation.
1. Both the Talk and Call indicators should be off.
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.
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).

8
INTERNAL SWITCHES, JUMPERS AND ADJUSTMENTS
There are several internal switches, jumpers and an adjustment that affect operation. These are
described below. To gain access to the switches, jumpers and the adjustment, 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.
Figure 2. Internal Switches, Jumpers and Adjustments. Note, if you have 9350-7749-000 board, figure 4 on page 19.
NOTE: Figure 2 shows a BP-2002 with the switches and jumpers in their factory default positions
(referenced in Table 2).
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 3.

9
NOTE: On the BP-1002, jumper JP6 must always have pins 2 and 3 shorted.
Side Tone Adjustment (R145)
The side tone 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.
Clear-Com Setup
Make the following switch and jumper changes when the belt pack is used with Clear-Com equip-
ment:
BP-2002
1. SW1 must be placed in the UNBAL position.
2. JP4 must have pins 1 and 2 shorted (U position).
3. JP5 jumper must be removed and placed on JP2.
4. JP2 must have pins 1 and 2 shorted (using jumper from JP5).
5. JP1 must have pins 1 and 2 shorted.
BP-1002
1. SW1 must be placed in the UNBAL position.
2. JP4 must have pins 1 and 2 shorted (U position).
3. JP6, JP5 must have pins 2 and 3 shorted at all times.
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Table 2. Default Settings. If you are using the 000 board, see page 19 for the default settings.

10
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Table 3. Internal Switches and Jumpers

11
Note: In case of local power use, install a jumper on pins 2 & 3 of U6
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 and jumpers JP4, JP5, JP2 and JP1 set to BAL position)
Pin 1 Common
Pin 2 Intercom audio low and +24 VDC input
Pin 3 Intercom audio high and +24 VDC input
Clear-Com Mode (Internal switch SW1 and jumpers JP4, JP5, JP2 and JP1 set to UNBAL
position)
Pin 1 Common
Pin 2 +30 VDC input
Pin 3 Intercom audio/call signal
BP-2002
Type: One XLR-6M and XLR-6F pair (callout 7 in Figure 1)
Audiocom® Mode (Internal switch SW1 and jumpers JP4, JP5, JP2 and JP1 set to BAL position)
Pin 1 Common
Pin 2 Local power (+24 VDC)
Pin 3 Channel A intercom audio low and +24 VDC input
Pin 4 Channel A intercom audio high and +24 VDC input
Pin 5 Channel B intercom audio low and +24 VDC input
Pin 6 Channel B intercom audio high and +24 VDC input
Clear-Com Mode (Internal switch SW1 and jumpers JP4, JP5, JP2 and JP1 set to UNBAL
position)
Pin 1 Common
Pin 2 Local power (14 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

12
SPECIFICATIONS
GENERAL:
Power Requirements:
Channel supplied: 24 VDC nominal, 45 to 70 mA
Local-power: (BP-2000 only) 24 VDC nominal (18 to 30 VDC), 45 to 70 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:
50 to 200 ohm dynamic microphone
150 to 600 ohm headphones
Balanced Intercom Channel:
Output Level: 1 Vrms nominal
Input Impedance: 300 ohm ±5%
Bridging Impedance: greater than 10,000 ohm
Call Signalling:
Send: 20 kHz ±100 Hz, 0.5 Vrms ±10%
Receive: 20 kHz ±800 Hz, 100 mVrms
Mic-Off Frequency:
Detect: 24 kHz ±800 Hz, 100 mVrms
Noise Contribution: less than -60 dB on the line

13
Unbalanced Intercom Channel:
Output Level: 480 mVrms ±10%
Input Impedance: 200 ohm ±5%
Bridging Impedance: greater than 10,000 ohm
Call Signalling:
Send: 12 ±3 VDC
Receive: 4 VDC minimum
HEADPHONE AMPLIFIER:
Voltage Gain:
20 ±3 dB from the line
Maximum Output:
60 mW into 150 ohm
Frequency Response:
200 Hz to 8 kHz with no more than 4 dB deviation
Audible Alert:
1 kHz, at the headset
Total Harmonic Distortion:
Less than 2% at 50 mW from the line
Sidetone:
20 dB minimum range, adjustable
DYNAMIC MICROPHONE AMPLIFIER:
Voltage Gain:
Mic to Channel; 45 ±3 dB, before limiting
Mic to Headphone; adjustable, 65 dB range into 150 ohm
Frequency Response:
200 Hz to 8 kHz +1/-3dB
Total Harmonic Distortion:
Less than 1% at Channel output at 1 kHz
ELECTRET MICROPHONE AMPLIFIER:
Voltage Gain:
Mic to Channel; 24 ±3 dB, before limiting
Mic to Headphone; adjustable, 45 dB ±10% into 150ohm
Frequency Response:
200 Hz to 8 kHz +1/-3dB
Total Harmonic Distortion:
Less than 1% at Channel output

14
Figure 4. Board Number 9040-7740-000.
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Default Settings

15
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
CAUTION
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 remov-
ing 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 102879-218,
1500 pF, 50V capacitor.

Figure 3. Printed Circuit Board

17
FACTORY SERVICE
All equipment returned for repair must be accompanied by documentation stating your return
address, telephone number and proof of date of purchase, along with a description of the problem.
In lieu of this, you may obtain a Return Authorization form from our Customer Service Department.
Customer Service Department
Telex Communications, Inc.
12000 Portland Avenue South
Burnsville, Minnesota 55337 U.S.A.
Telephone: [phone]
Fax: [phone]
Return equipment to:
Service Department
Telex Communications, Inc.
West 1st Street
Blue Earth, Minnesota 56013 U.S.A.
WARRANTY REPAIRS - If in warranty, no charge will be made for the repairs. Equipment being returned
for warranty repair must be sent prepaid and will be returned prepaid.
NON-WARRANTY REPAIRS - Equipment that is not under warranty must be sent prepaid to Telex. If
requested, an estimate of repair costs will be issued prior to service. Once your approval for repair,
and repair of equipment is completed, the equipment will be returned on a collect basis. Collect
charges may be avoided by sending a signed check for payment in full along with your signed
estimate approval form (the estimate includes the shipping charge).