1. Channel 1 talk button, indicator light and listen volume control.

2. Channel 2 talk button, indicator light and listen volume control.

3. Call button and indicator light.

4. Carbon-mic headset jack. May also be used for external mic switch. See "Programmable Options".

5. Program volume control. Active only when using the line loop connector for optional program input.  See "Programmable Options".

6. Monaural dynamic-mic headset jack.

7. 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 "Programmable Options" and "Alternate Powering Methods".

8. Intercom line connector. For connection to intercom system.

        9. Stereo dynamic-mic headset jack.

10. Rear cover removal to set options:

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

OPTION NOTES

1. Listen is factory set to be on all the tuna on both channels. Setting Wi 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:

a. Set W1 to "off" to disable channel 1 intercom audio listen to the left headphone.

b. Set DIP switch 4 to "on" to disable channel 1 talk (See option note 6.)

c. Setup the left channel for program input. (See option note 2.)

2. To use program audio input:

a. Unplug the LINE LOOP connector from J6, and plug it into J5. (Refer to the label inside the BP325 rear cover.)

b. 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".

c. 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

3. W5 applies to a stereo dynamic-mic headset connected 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.

4. The CARB-MIC connector may be used to connect 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 9, below.) To use the CARB-MIC connector for an external mic on/off switch:

a. Place jumper W7 in the "EXT MIC SW" position.

b. Use a stereo phone plug to connect the external switch to the CARB-MLC HEADSET jack:

Tip - Remote Mic Switch Normal-open Contact

Ring - No connection

Sleeve - Remote Mic Switch Common

c. 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 the 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 BP325; however, the external mic switch will not work unless the TALK buttons are first turned on at the BP325.

5. As supplied, the TALK 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.

6. Setting DIP switch 3 to the "on" position will disable the channel 2 TALK button. Setting DIP switch 4 to the "on" position will disable the channel 1 TALK button.

7. As supplied, the BP325 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.

8. As supplied, other intercom stations can deactivate the TALK buttons on the BP325 using the talk-off feature from their intercom stations. To disable this feature, set DIP switch 8 in the "off’ position.

9. Using the LINE LOOP connector for an external mic on/off switch:

a. Unplug the LINE LOOP connector from J6 on the circuit board, and plug it into J4.

b. Connect the external mic switch to the LINE LOOP connector using an XLR-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

c. 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 TALK button(s). Release the mic switch to turn off the TALK button(s). Note: the TALK buttons may still be turned on or off from the BP325; however, the external mic switch will not work unless the TALK buttons are first turned on at the BP325.