Clear-Com BS850 (Last time buy) - Manual (Page 36)

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Buttons A and B modes
• If Beltpac button is set up for Latching function, press and release button in less than one
second to lock on. Press and hold for momentary mode, to remain on only while button is held.
• If set up for Momentary mode, button will remain on only while held. Lock feature cannot be
used.
• Either or both of these buttons can be Disabled (turned off) in Beltpac setup.
• “A” LED turns red while user is talking on intercom Channel 1.
• “B” LED turns red while user is talking on intercom Channel 2.
Beltpac Dual-Receiver Operation
A Beltpac equipped with the optional second receiver operates a little differently from a single-
receiver Beltpac. When a user switches from Channel 1 to Channel 2 on a single-receiver Beltpac,
the microcontroller inside the Beltpac automatically switches the receiver frequency from Rx1 to Rx2.
That means that it is not normally possible for the user to hear both intercom channels at the same
time. With a dual-receiver Beltpac, there is no need to change frequencies and the primary receiver
always stays tuned to Rx1 and the second receiver stays tuned to Rx2. The user is then able to hear
both intercom channels at the same time and adjust the relative volume between them.
This difference makes the operational characteristics of a dual-receiver Beltpac slightly different from
those of a single-receiver Beltpac. On a single-receiver Beltpac, only one of the A or B indicator lights
will be on indicating the current channel. On a dual-receiver Beltpac, both A and B indicator lights will
be on indicating that both receivers are active. If one of the buttons is programmed to toggle between
channels, the current channel indicator will blink. An additional feature of the dual-receiver Beltpacs is
the ability to talk on both intercom channels at the same time.