User manual

Clear-Com Intercom Systems KB-211/KB-211GM Two-Channel Speaker Stations
© Clear-Com Intercom Systems 1999
1
Rev. A
Introduction
Congratulations and thank you for choosing this Clear-Com product.
The KB-211 and KB-211GM Two-Channel Speaker Stations are powerful,
user-friendly units that can serve as versatile intercom stations.
Please read this manual completely to better understand the functions of
these products. For questions not addressed in this manual, contact the
dealer or Clear-Com directly. Clear-Com applications support and service
people are ready to help.
Description
The Clear-Com PL-Pro
™
KB-211 is a two-channel speaker station designed
for use in theatres, live performances, industrial environments, and small
television facilities. It features speech intelligibility, even in high noise levels,
and can be customized through its programmable options.
In addition, the Clear-Com PL-Pro
™
KB-211GM also contains a jack for an
optional Clear-Com gooseneck panel microphone and a close-in, voice-
operated circuit (VOX). This circuit allows automatic, alternate dipping of the
panel microphone and the speaker in response to conversation.
Selectable, two-channel talking and/or listening allows the operator to
communicate on either of the intercom channels. The dual-action talk button
operates in electronic momentary or latching mode. Monitoring can be done
through the headset, the integral speaker, or both simultaneously. The KB-211
offers both visual and audible call signaling to attract the attention of
operators. The Remote Mic Kill (RMK) feature on main stations will turn off
any open microphones on the KB-211.
A balanced program input allows the monitoring of external audio using the
headset or speaker. This program input can also be used as a paging
function.
The KB-211 speaker station accepts dynamic headsets, such as the Clear-
Com PL-Pro
™
Series HS-6 Telephone Handset or PT-4 Push-to-Talk Hand
Microphone. A sidetone control allows the operator to vary the level of his
voice heard through the headset and speaker.
The integral speaker can be turned on or off by a convenient front-panel
switch. An automatic speaker dipping circuit will lower the level of the speaker
whenever the talk button is activated. The KB-211GM’s close-in VOX dips the
speaker or gooseneck microphone automatically as the station is used. These
features help minimize acoustical feedback.
The KB-211 receives 30-VDC power from the Clear-Com intercom line. The
unit mounts either in a standard four-gang electrical outlet box or in an
optional Clear-Com V-Box. The extra-thick front panel and compact, surface-
mount circuitry results in a reduced size and lighter weight package that
maintains Clear-Com ruggedness. The two intercom channels connect to a