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BP-325
Users Manual
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RTS BP-325 Users Manual

II
I
MODEL BP-325
Belt-pack Inter com S tation
User Manual
9350-5690-00 Rev. M 8/2008
PROPRIETARY NOTICE
SHIPPING TO THE MANUFACTURER
COPYRIGHT NOTICE
Copyright 2007 by Telex Communications, Inc. All rights reserved. Reproduction, in whole or in part, without prior written permission from Telex is prohibited.
WARRANTY NOTICE
See the enclosed warranty card for further details.
CUSTOMER SUPPORT
Te chnical questions should be directed to:
Customer Service Department RTS/Telex Communications, Inc. 12000 Portland Avenue South Burnsville, MN 55337 USA Telephone: 800-392-3497 Fax: 800-323-0498 Factory Service: 800-553-5992
RETURN SHIPPING INSTRUCTIONS
Customer Service Department Telex Communications, Inc. (Lincoln, NE) Telephone: 402-467-5321 Fax: 402-467-3279 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 quantity of equipment, a description of the problem and the serial number(s).
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 shock-absorbing material. All shipments must be sent 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 East Cornhusker Hwy. Lincoln, NE 68507 U.S.A. Attn: Service
This package should include the following:
Qty Description Part No.
1 Final Assy, BP325, Gray 9010673800
Final Assy, BP325, Rev
2.0
Final Assy, BP325, Black 9010673821 1 User Manual 9350569000 1 W arranty Statement 38110387 1 EMC & LVD Statement 38109675
9010673820
Contents
Chapter 1 - Connections And Operation
Connections .................................................................................................................................................1
Headset ........................................................................................................................................................1
Intercom Channels ......................................................................................................................................1
Operation ....................................................................................................................................................2
Programmable Options ...............................................................................................................................3
Factory Settings ..........................................................................................................................................3
Jumpers (W1-w7) ........................................................................................................................................4
Sidetone Adjustment ....................................................................................................................................5
Alternate Powering Methods ......................................................................................................................5
General ........................................................................................................................................................5
Method One: One Channel Operation With A Non-rts Power Supply .......................................................5
Line Input Connector Wiring For 1-channel Operation With Non-rts Power Supply ................................6
Bottom View Of The Main Circuit Board ...................................................................................................6
Line Loop Connector Wiring For 2-channel Operation With Non-rts Power Supply. ...............................6
Line Input Connector Wiring For 2-channel Operation With Non-rts Power Supply ................................6
Method Two: Two Channel Operation With A Non-rts Power Supply .......................................................7
Table
Of
Chapter 2 - Replacement Parts
Where To Obtain Parts ...............................................................................................................................9
Electrical Parts .........................................................................................................................................10
Chapter 3 - Specifications And Drawings
Specifications ............................................................................................................................................15
Drawings ...................................................................................................................................................16
Front Panel Board Assembly, Bp325 ........................................................................................................17
Main Board, Bp325 ...................................................................................................................................18
Rear Panel Assembly, Bp325 ....................................................................................................................19
Rear Panel Assembly, Bp325 ....................................................................................................................20
Final Assembly, Bp325 .............................................................................................................................21
Schematic Diagram, Front Panelcircuit Board ........................................................................................22
Schematic, Main Board Page 1 .................................................................................................................23
Schematic, Main Circuit Board Page 2 ....................................................................................................24
Bp-325 Cable Assemblies ..........................................................................................................................25
CHAPTER 1
CONNECTIONS AND OPERA TION
This section describes operation of the BP325 as supplied from the factory . Use of an RTS power supply to power the intercom system is assumed. For options and use of an alternate power source (See “PROGRAMMABLE OPTIONS” on page 3. and See “ALTERNATE POWERING METHODS” on page 5..

CONNECTIONS

Headset

Connect a headset using one of the three headset connectors on the back panel. The MONO HEADSET and STEREO HEADSET connectors are for monaural or stereo dynamic-mic headsets. The CARB-MIC HEADSET connector is for a monaural carbon-mic headset. Refer to the specifications for pin-outs of these connectors if needed.

Intercom Channels

Connect the BP325 to the intercom system using the LINE INPUT connector on the back panel.
If desired, connect an additional intercom station to the intercom system using the LINE LOOP connector on the back panel.
1
CONNECTIONS AND OPERATION
T
AL
K
T
AL
K
C A L L
RTS SYSTEMS
BP325 PORTABLE HEADSET STATION
MONO
HEADSET
LINE LOOP
AUX I/O
CARB-MIC HEADSET
LINE
INPUT
PGM VOL
STEREO
HEADSET
REMOVE COVER
4 5
1 2
3
6 7 10b 8 9
10a
10a
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Channel 1 talk button, indicator light and listen volume control.
Channel 2 talk button, indicator light and listen volume control.
Call button and indicator light.
Carbon-mic headset jack. May also be used for external mic switch. See "Programable Options".
Program volume control. Active only when using the line loop connector for optional program input.
See "Programable Options".
Monaural dynamic-mic headset jack.
Intercom line loop connector for connection to additional intercom stations. May also be used for external program input, external mic switch, or a non-standard power source. See "Programable Options" and "Alternate Powering Methods".
Intercom line connector. For connection to intercom system.
Stereo dynamic-mic headset jack.
Rear cover removal to set options: Loosen two screws (10a) and remove one screw (10b).

OPERATION

1. Attach the BP325 to your belt or other convenient location using the belt clip on the rear panel.
2. Put on the headset and adjust the listen volume controls while listening to the intercom channels.
3. A TALK button may be activated in either of two ways:
Momentary Mode: Press and hold the TALK button, then speak into the microphone. The green talk LED will remain lit while the TALK button is held. Release the TALK button when finished talking. The talk LED will turn off. Latching Mode for Hands-free Conversation: Tap the TALK button (do not press and hold). The green talk LED will turn on and remain on. When finished talking, tap the TALK button again. The talk LED will turn off.
4. Calling an intercom channel:
a.Turn on the TALK button for the channel to be called (the green talk LED should be lit). b.Press and hold the CALL button. The red call LED will light while the button is pressed, indicating that a call signal is being sent. When a response is heard, release the CALL button and begin your conversation. c.Turn off the TALK button when finished with your conversation.
5. Receiving a call:
2

FACTORY SETTINGS

TRS JACK FUNCTION
EXT MIC
SW
CARB
MIC
HOST
W7
SW 1 CALL SIGNAL DISABLE
SW 2 MOMENTARY ONLY CH 2
SW 3 TALK 2 DISABLE
SW 4 TALK 1 DISABLE
SW 5 MOMENTARY ONLY CH 1
SW 6 TALK OFF TRANSMIT ENABLE
SW 7 NOT USED
SW 8 TALK OFF RECEIVE ENABLE
12345678
ON
S1
W1
THRU
W4 ON
W4
W3
W2
W1
W5
W5
PGM RIGHT
PGM LEFT
CH 2 LISTEN
CH 1 LISTEN
MONO
STEREO
BAL2
R52
BAL1
R39
MONO 4-PIN
HEADSET
STEREO 5-PIN
HEADSET
INTERCOM
INPUT
INTERCOM
LOOP
PGM INPUT
REMOTE MIC SW/
LOCAL POWER
J2
J3
J7
J6
J4
J5
1
1
1
1
1
a.When there is an incoming call on a channel, the red call LED will flash. b.If a talk LED is also flashing, this indicates that you need to activate that TALK button to begin your conversation. c.If no talk LED is flashing, this indicates that the TALK button is already on; simply begin your con­versation.
6. Sending a Talk-off Signal: The BP325 can generate an inaudible signal which can be used to deactivate the talk buttons on
other intercom stations connected to an intercom channel. (May be used with models BP325, MCE325 and MRT327). This feature is useful when an unattended intercom station has its microphone activated and is causing noise on an intercom channel. To send a talk-off signal:
a.Turn off both TALK buttons on the BP325. b.Tap the CALL button three quick taps. The red call LED will turn on for about 2 seconds. c.While the red call LED is on, momentarily press the TALK button for the channel that has the TALK button to be turned off. This will send the signal and turn off the remote TALK button.

PROGRAMMABLE OPTIONS

Several internal option switches and jumpers can modify the belt pack’s operation. The factory settings are summarized below. To change any of the factory settings, remove the rear cover screws as shown in Figure 1. Jumper and switch locations are shown on the label inside the rear cover.
FACTORY SETTINGS
TABLE 1. BP-325 Unit Jumper Settings - This equipment complies with the requirements in Part 15 of the FCC Rules for a
Class A computing device. Operation of this equipment in a residential area may cause unacceptable interference to radio and TV reception requiring the operator to take whatever steps are necessary to correct the interference.
3
CONNECTIONS AND OPERATION

Jumpers (W1-W7)

No.
Setting Description
W1 W2 W3
W4
W5 W6 Not Used W7
DIP Switches (S1)
1 Call Signal Transmit Disable OFF
2
3 4
5
6 7Not Used OFF
8
CH 1 Intercom Audio Listen
CH 2 Intercom Audio Listen Program input to left headphone
Program input to right headphone
Stereo/Mono operation
CARB/MIC Jack Function
Momentary Only Talk Button, CH2
CH2 Talk Disable CH1 Talk Disable
Momentary Only Talk Button, CH1
Talk-off Transmit enable
Talk-off Receive Enable
i
b
e
f
f
e
a
a
c
d
g
h
a. Listen is factory set to be ON all the time on both
channels. Setting W1 to the OFF position will dis­able intercom listen audio on channel 1 (usually the left headphone of a stereo headset). Setting W2 to the OFF position will disable intercom listen audio on channel 2 (usually the right headphone of a stereo headset). Listen disable could be used, for example, when you want to use the left side of a stereo headphone exclusively for program audio input and the right side for a single channel of intercom audio. In this case you would:
1. Set W1 to OFF to disable channel 1 intercom audio listen to the left headphone.
2. Set DIP switch 4 to ON to disable channel 1 talk.
3. Setup the left channel for program input.
b
Factory Default
ON ON OFF
OFF
Stereo
Headset
OFF
OFF OFF
OFF
ON
ON
b. To use program audio input:
1. Unplug the LINE LOOP connector from J6, and plug it into J5.
2. If you are using a stereo headset, set W3 and/or W4 to ON to route the program audio to the left headphone, right headphone or both headphones. If you are using a mono headset, set both W3 and W4 to ON.
3. Connect the program source to the LINE LOOP connector using an XLR-3-32 female receptacle wired as follows
Pin 1 - Common Pin 2 - Program input high Pin 3 - Program input low
4. Adjust program input volume using the PGM VOL control on the back panel.
c. W5 applies to a stereo dynamic-mic headset con-
nected to the STEREO HEADSET jack. With W5 set in the stereo position, intercom channel 1 will be heard in the left headphone only, and channel 2 will be heard only in the right. In the mono posi­tion, both intercom channels (and program audio if connected) will be heard in both headphones. If you are using monaural headphones connected to the MONO HEADSET jack, W5 may be left in the stereo position.
d. The CARB-MIC connector may be used to con-
nect either a headset or an external mic ON/OFF switch. (If you are using a carbon-mic headset, but still wish to use an external mic switch, the LINE LOOP connector may alternatively be used for the mic switch. See note X, below.) To use the CARB­MIC connector for an external mic ON/OFF switch:
1. Place jumper W7 in the “EXT MIC SW” posi­tion.
2. Use a stereo phone plug to connect the external switch to the CARB-MIC HEADSET jack:
Tip: Remote Mic Switch Normal-open
Contact Ring: No connection Sleeve: Remote Mic Switch Common
3. To use the external mic switch, first set one or both T A LK buttons to the latched-on position. Then, press the external mic switched turn th e TALK button(s) ON. Release the mic switch to turn the TALK button(s) OFF. Note, the TALK buttons may still be turned ON or OFF from the BP-325; however, the external mic switch will not work unless the TALK buttons are first turned ON at the BP-325
4
CONNECTIONS AND OPERATION
e. As supplied, the TA LK buttons feature a dual-
action momentary/latching operation: press and hold for momentary talk, then release when fin­ished; or tap to latch ON for hands-free talk, and tap again to turn OFF when finished talking. If desired, the latching operation may be defeated, and the TALK buttons may be operated in momen­tary mode only.
f. Setting DIP switch 3 to the ON position will dis-
able the channel 2 TALK button. Setting DIP switch 4 to the ON position will disable the chan­nel 1 TALK button.
g. As supplied, the BP-325 can generate an inaudible
talk-off signal which can be used to deactivate the talk buttons on other intercom stations connected to an intercom channel. To turn this feature OFF, set DIP switch 6 to the OFF position.
h. As supplied, other intercom stations can deactivate
the TALK buttons on the BP-325 using the Talk­Off feature from their intercom stations. T o disable this feature, set DIP switch 8 in the OFF position.
i. Using the LINE LOOP connector for an external
mic ON/OFF switch:
1. Unplug the LINE LOOP connector from J6 on the circuit board, and plug it into J4.
2. Connect the external mic switch to the LINE LOOP connector using an SLR-3-32 female recep­tacle wired as follows:
Pin 1: Remote Mic Switch Common Pin 2: No Connection Pin 3: Remote Mic Switch
Normal-open Contact
3. To use the external mic switch, first set one or both TALK buttons to the latched-ON position. Then, press the external mic switch to turn ON the T ALK button(s). Release the mic switch to turn o ff the T A LK button(s). Note, the TALK buttons may still be turned ON or OFF from the BP-325; how­ever, the external mic s wi tc h will not work unle ss the TALK buttons are first turned on at the BP-
325.

ALTERNAT E POW ERING METHODS

GENERAL

When using an RTS power supply to power the intercom system, power is carried to the BP325 on pin 2 of the LINE INPUT connector along with the channel 1 audio. Pin 1 is the DC return. The unique design of RTS power supplies permits power to be carried on an audio channel. RTS power supplies also provide the proper terminating impedance for each intercom channel. If a non-RTS power supply is used, there are two alternatives for connecting power and intercom audio.
The first method uses channel 1 only to connect the non-RTS power supply. Audio on channel 1 will be unusable as the power supply will look like a short circuit at audio frequencies. Channel 2, however, will still be operational. Also, channel 2 will require a terminating impedance, since this is not supplied by the non-RTS power supply.
The second method allows the use of a non-RTS power supply while still maintaining two audio channels. This method requires an additional wire to the belt pack, and the LINE LOOP connector will not be usable for connecting another intercom station. Also, each intercom channel must be properly terminated. The two methods are discussed below.

METHOD ONE: ONE CHANNEL OPERATION WITH A NON-RTS POWER SUPPLY

Using an XLR-3-32 female connector, connect the external power source and the channel terminating components to the LINE INPUT connector as shown in Figure 2.

SIDETONE ADJUSTMENT

You can change the level of your own voice heard in your headphones while talking on an intercom channel. Adjust R39 to change your voice level when talking on channel 1. Adjust R52 to change your voice level when talking on channel 2.
If desired, the LINE LOOP connector may be used to connect power and audio to an additional intercom station.
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