Features in Detail
The Basic Series provides a cost-effective solution in more limited applications that require full duplex, party line communication. All interconnections are made with standard, balanced micro- phone cable with XLR-3 connectors. Installation requires no expert knowledge, and clear layout of controls assures trouble-free operation with a very short learning curve. A current-driven interconnect loop ensures that operator listening levels do not change as stations are added to or removed from the network.
Both the Master Station and beltpack accept either dynamic or electret microphones as standard. Mic gain is adjustable for optimum results with any microphone. A headset detection circuit ensures the mic pre- amp is active only when a headset is connected. A volume control enables the user to listen at BS 287 2-channel Power Supply any desired volume, and to balance levels on the two channels of the BS 217 Master Station.
Each user station includes a side tone trimmer for each channel to al- low adjustment of the operator’s voice level as heard through his or her own headset.
Switch-mode Power Supplies
In case of short circuit or excessive thermal condition, the power supply will self-protect by shutting down. Once the fault is corrected, the power supply automatically resets and restores normal operation.
TALK button with green LED indicator connects to all user stations and beltpacks on the indicated channel.
The combined audible and visual CALL alert adapts to both sound- and light sensitive environments. An incoming or outgoing call signal is indicated by a large red LED. Pushing the CALL button for more than two seconds activates the internal BUZZER. Volume of the BUZZER can be trimmed or muted.
The 2-channel Master Station (BS 217) and the 2-channel Power Supply (BS 287) each offer a balanced auxiliary input (individually attenuated for each channel), normally used to carry the auditorium or on-air program audio. The inputs are for line level signals.
BS 217 2-channel Master Station
The BS 217 is designed to function as the master unit in a 2-channel analog partyline system and operates as a dual channel power supply for driv- ing connected beltpacks. Each channel has a TALK button + LED, a CALL button + LED and a Volume (Listen level) control. On the rear panel is an AUX input for line level audio. Separate volume controls for the AUX input allow Aux Program levels for each channel to be adjusted independently.
BS 17 1-channel Beltpack
The BS 17 is a 1-channel partyline station housed in a strong, lightweight PC/ABS case with nylon clip. It is powered via the partyline by a BS 217 Master Station or a BS 181 or BS 287 Power Supply.
BS 181 1-channel Power Supply
The BS-181 is a 1-channel Power Supply Unit, housed in a steel case. The unit enables cost- effective system powering when only one channel is needed. It is capable to safely drive up to fteen BS 17 Beltpacks when each is set to full volume.
BS 287 2-channel Power Supply
The BS 287 is a 2-channel Power Supply Unit with an AUX input for program signals (line level). It is housed in a 1U steel rack-mount case. The BS 287 will safely drive up to fteen BS 17 Beltpacks when each is set to full volume. On the rear panel is an AUX input for line level audio. Separate volume controls for the AUX input allow Aux Program levels for each channel to be adjusted independently.
The Basic Series products are also available as Talkpacks (pre-packed intercom systems) in the following con gurations: