Clear-Com BS850 (Last time buy) - Manual (Page 32)

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ADVANCED CONFIGURATION
Because of its advanced digital signal processing, the PRO850 is very flexible and can be configured to fit the
needs of any installation. This section covers some of the available configurations.
Auxiliary Input and Output Functions:
The base station auxiliary input and output are used for different purposes depending on the system
configuration. In Single, Not Distributed mode (see page 15), the auxiliary input can be mixed with other
sources and delivered to any output. This allows an input such as program audio to be fed to all Beltpac users,
wired intercom users, or simply monitored by the local headset. In this mode, the auxiliary output may be used
as a secondary paging channel (without relay contacts) when Beltpacs are configured for Talk Aux, or as an
output to monitor any combination of inputs.
When the base is configured for Single, ISO+ mode (see page 15), the auxiliary input and output work together
as an additional isolated four-wire intercom channel. Any input is delivered to all Beltpac users on both
transmitters. Any Beltpac user pressing an ISO button will be heard through the auxiliary output.
In Master/Slave modes, the auxiliary input and output are used to distribute receiver audio from the Slaves up to
the Master. See the section on Cascading Bases for more information.
Single Transmitter Two-Channel Operation
If desired, a single transmitter may be used to distribute both intercom channels to Beltpac users. This allows
users to listen to both intercom channels simultaneously and still be able to select talk on a particular channel.
Because the mixing takes place inside the base station, all users hear the two channels in the same combination
(Beltpac auxiliary volume controls are not used). If users need to adjust the two channels separately, two
transmitters and optional second receivers in the Beltpacs are required.
To configure the system for single transmitter operation, first disable one transmitter by selecting Off in the
Base Tx Setup screen (see page 25). Then configure all Beltpacs so that both receiver frequencies are set to the
one transmit frequency. For example: If the base transmitter is set to 508.250 MHz, set both Beltpac Rx1 and
Rx2 to 508.250 MHz. The indicator LED’s on the Beltpacs will continue to indicate which channel is the user’s
talk channel. The base station DSP will automatically mix both intercom channels into the one transmitter.
IFB Transmitter Operation
In a PRO850 system equipped with dual receiver Beltpacs, the system may be configured to act as an IFB
transmitter. When configured in this way, dual receiver Beltpac users will hear all intercom audio through
the primary receiver and IFB audio through the second receiver. Users with single receiver Beltpacs will
hear all intercom audio, but will not hear the IFB channel.
To configure the system for IFB operation, first set Transmitter 2 by selecting IFB in the Base Station
Transmitter Power screen (see page 25). Second, choose an audio source for Transmitter 2 and enable it in
the Base Station Transmitter Output Mix Levels screen. Then configure any single receiver Beltpacs for
single frequency operation as described under Single Transmitter Two-Channel Operation. Finally,
configure the dual receiver Beltpacs so that Rx1 is tuned to the same frequency as base transmitter 1 and
Rx2 is tuned to the same frequency as base transmitter 2.
Once a base transmitter has been set to IFB mode, all intercom audio will be automatically routed through
the remaining transmitter. The transmitter set to IFB mode, will only transmit program audio manually
assigned to it.
On dual receiver Beltpacs, use the Aux volume control to adjust the relative level of the IFB channel. Press
and hold the Aux volume control to mute the IFB channel.