Telex Network Card BP 1002 User Manual

Operating Instructions  
BP-1002/BP-2002 Beltpacks  
Audicom Intercom Systems  
9350-7740-000 Rev K  
08/2008  
 
Table  
Of  
Contents  
Introduction ..........................................................................................1  
External Connections and Controls ......................................................3  
Operation ..............................................................................................5  
System Power ........................................................................................5  
Initial BP-1002/2002 Setup ..................................................................5  
Operating Modes ..................................................................................5  
Changing Modes of Operation .............................................................6  
Internal Switches, Jumpers and Adjustments .......................................6  
Sidetone Adjustment (R145) ..................................................................7  
Mic Gain Adjustment (R156) ................................................................7  
Clear-Com Setup ...................................................................................8  
BP-1002/2002 .......................................................................................8  
Connector Pin Configurations ..............................................................9  
Specifications ......................................................................................10  
Optional Football Modifications ........................................................11  
General Description ...........................................................................11  
Eliminating Mic-Kill and Call Signal .................................................11  
Restoring Mic-Kill and Call Signal ....................................................11  
 
 
CHAPTER 1  
Introduction  
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.  
®1  
The Audiocom BP-1002 and BP-2002 are microprocessor controlled one- and  
two-channel intercom beltpacks. An internal switch and jumper setting allows the  
®2  
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.  
®
1. Audiocom is a registered trademark of Telex Communications, Inc., Burnsville, MN  
55337.  
®
2. Clear-Com is a registered trademark of Clear-Com Intercom Systems.  
Introduction  
1
 
FIGURE 1. BP-2002 & BP-1002 Connections and Controls  
2
Introduction  
 
External Connections and Controls  
NOTE:  
The numbers refer to the callouts in Figure 1.  
1.  
2.  
Volume Control -  
Use this control to adjust the headset listen level.  
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 allow 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, call can be sent  
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.  
Introduction  
3
 
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 Phillips head  
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.  
7.  
Headset Connector -  
This connector accepts a four-wire Telex boom-  
microphone headset.  
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 beltpack or other  
station on the channel.  
4
Introduction  
 
CHAPTER 2  
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 (BP-2002  
only)  
Both the BP-1002 and BP-2002 will pass system power through to subsequent  
beltpacks that are “daisy chained” together.  
Initial BP-1002/2002 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.  
Operating Modes  
The microprocessor within the BP-1002/2002 controls four (4) modes of operation  
that affect the Microphone Kill and Audible Call Alert features. These modes can be  
seen in Table 1 on page 6.  
Operation  
5
 
Changing Modes of Operation  
Perform the following steps to change the mode of operation.  
NOTE:  
Both the Talk and Call indicators should be OFF and the headset should  
be connected.  
9. Press and hold the Talk key, and then press and hold the Call key.  
10. Release both keys.  
The Call indicator should now glow red. (The number of beeps heard in the  
headset indicates the current mode of operation.)  
11. Press the Call key to change to the next mode of operation.  
Each press of the Call key will cause the BP-1002/2002 to change to the next  
mode of operation.  
12. 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 hears 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).  
TABLE 1. Modes of Operation  
Mode (beeps)  
Mic Kill  
Disabled  
Enabled  
Audible Call Alert  
Disabled  
1
2 (default)  
Disabled  
3
4
Disabled  
Enabled  
Enabled  
Enabled  
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 the bottom of each side. Switch, jumper and adjustment  
locations are shown in Figure 2.  
6
Operation  
 
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 and Mic Gain adjustment are 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 on page 8.  
Sidetone Adjustment (R145)  
The sidetone adjustment is accessible either internally (refer to Figure 3) or by  
removing the belt clip mounting screw (callout 5 in Figure 1 on page 2).  
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 Phillips head 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) (refer to  
Figure 3) or by removing the belt clip mounting screw (callout 5 in Figure 1 on  
page 2).  
Operation  
7
 
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 beltpack is used with  
Clear-Com equipment.  
BP-1002/2002  
>
SW1 must be placed in the UNBAL position.  
TABLE 2. Internal Switches and Jumpers  
Jumper/  
Default  
Setting  
Switch  
Jumper or Switch Function  
Number  
Power Select  
Channel One Power: pins 2 & 3 shorted  
(On BP-1002, pins 2 & 3 are always shorted  
Pins 2 & 3 are  
shorted  
JP1 and JP2  
SW1  
Channel Two Power: pins 1 & 2 are shorted  
Clear-Com/Audiocom®  
BAL  
Unbalanced/Balanced Line  
Pins 2 & 3  
shorted  
JP3  
JP5  
Must be left on default  
Pins 1 & 2 Shorted  
Pins 1 & 2  
shorted  
8
Operation  
 
Connector Pin Configurations  
Headset Connector  
Type: XLR-4M (callout in Figure 1)  
Pin 1  
Headset Microphone Low  
Pin 2  
Pin 3  
Pin 4  
Headset Microphone High  
Headphone High  
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  
Pin 2  
Pin 3  
®
Common  
Intercom audio/call low and +24VDC input  
Intercom audio/call high and +24VDC input  
Clear-Com Mode (Internal switch SW1 set to UNBAL position)  
Pin 1  
Pin 2  
Pin 3  
Common  
+30VDC input  
Intercom audio/call signal  
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  
Pin 2  
Pin 3  
Pin 4  
Pin 5  
Common  
Local Power (21-30VDC)  
Channel A intercom audio/call low and +24VDC input  
Channel A intercom audio/call high and +24VDC input  
Channel B intercom audio/call low and +24VDC input  
Channel B intercom audio/call high and +24VDC input  
Pin 6  
®
Clear-Com Mode (Internal switch SW1 set to UNBAL position)  
Pin 1  
Pin 2  
Pin 3  
Pin 4  
Pin 5  
Pin 6  
Common  
Local Power (21-30VDC)  
Channel A +30 VDC input  
Channel A intercom audio/call signal  
Channel B +30VDC input  
Channel B intercom audio/call signal  
Operation  
9
 
Specifications  
General  
Power Requirements:  
Channel Supplied: 24VDC nominal, 40 to 100mA  
Local Power: 24VDC nominal (21 to 30VDC), 40 to 100mA  
Environmental Requirements:  
Storage: -20°C to 80°C; 0% to 95% humidity, non-condensing  
Operating: -15°C to 60°C; 0% to 95% humidity, non-condensing  
Dimensions: 5.0” (127mm) H x 3.5” (88.9mm) W x 1.8” (45.7mm) D  
Weight: 13oz. (0.4kg)  
Interface Requirements  
Headset:  
1000-3000 Ohm electret microphone  
50-200 Ohm dynamic microphone  
150-600 Ohm headphones  
Input Level:  
4mVRMS (nominal)  
Balanced Intercom Channel:  
Output Level: 1 VRMS nominal  
Terminating Impedance: 300 Ohm ±10%  
Bridging Impedance: greater than 10,000 Ohm  
Call Signaling  
Send: 20kHz ±100Hz, 500mVRMS ±10%  
Receive: 20kHz ±800Hz, 100mVRMS  
Mic-Off Frequency  
Detect: 24kHz ±800Hz, 100mVRMS  
Noise Contribution: less than -60dBu on the line  
Total Harmonic Distortion: less than 1% at channel output for normal input  
Unbalanced Intercom Channel:  
Output Level: 775mVRMS ±10%  
Terminating Impedance: 200 Ohm ±10%  
Bridging Impedance: greater than 10,000 Ohm  
Call Signaling  
Send: 12 ±3VDC on the line  
Receive: 4 -15VDC from the line  
Total Harmonic Distortion: less than 1% at channel output for normal input  
Headphone Amplifier  
Maximum Output:  
4.5 ±10% Vrms into 150Ω headset  
Frequency Response:  
200Hz to 8kHz ±2dB  
Audible Alert:  
1kHz, at the headset  
Total Harmonic Distortion:  
Less than 1% at less than 3.5VRMS into 150Ω headset  
Sidetone:  
17dB minimum range, adjustable  
10 Operation  
 
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 24kHz signal from the channel. In some application 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-2002/1002  
by removing a surface mounted capacitor from the printed circuit board.  
To remove the capacitor, do 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, 1500pF, 50V capacitor.  
Operation 11  
 
FIGURE 3. Printed Circuit Board  
12 Operation  
 
Notes  
Operation 13  
 
 

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