CLEAR KB-702, KB-702GM User Manual
CLEAR-COM ENCORE
KB-702/KB-702GM TWO-CHANNEL SPEAKER STATIONS
INSTRUCTION MANUAL
KB-702/KB-702GM Two-Channel Speaker Stations Instruction Manual
© 2007 Vitec Group Communications
All Rights Reserved
Part Number 810492Z Rev. 2
Vitec Group Communications, LLC.
850 Marina Village Parkway
Alameda, CA 94501
U.S.A
Vitec Group Communications
7400 Beach Drive
Cambridge Research Park
Cambridgeshire
United Kingdom
CB25 9TP
Vitec Group Communications
Room 1806, Hua Bin Building
No. 8 Yong An Dong Li
Jian Guo Men Wai Ave
Chao Yang District
Beijing, P.R. China 100022
Clear-Com is a registered trademark of Vitec Group Communications.
The Clear-Com Logo is a registered trademark of Vitec Group Communications.
CONTENTS
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Internal Adjustments and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Block Diagram for the KB-702 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Block Diagram for the KB-702GM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
KB-702/KB-702GM Two-Channel Speaker Stations. . . . . . . . . . . . . . . . . . . 4-1
LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-I
Warranty Period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-i
Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-i
Warranty Repairs and Returns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-ii
Non-Warranty Repairs and Returns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-ii
Extended Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-ii
Service Contract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-iii
Liability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-iii
KB-702/KB-702GM TWO-CHANNEL SPEAKER STATIONS
i
ii
KB-702/KB-702GM TWO-CHANNEL SPEAKER STATIONS
Please read and follow these
instructions before operating
this product.
IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves,
or other apparatus (including amplifiers) that produce heat.
9. Only use attachments/accessories specified by the manufacturer.
10. Use only with the cart, stand, tripod, bracket, or table specified by the
manufacturer, or sold with the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to avoid injury from tip-over.
11. Unplug this apparatus during lightning storms or when unused for long
periods of time.
12. Refer all servicing to qualified service personnel. Servicing is required when
the apparatus has been damaged in any way, such as power-supply cord or
plug is damaged, liquid has been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to rain or moisture, does not
operate normally, or has been dropped.
13. WA RN I NG : To reduce the risk of fire or electric shock, do not expose this
product to rain or moisture.
Please familiarize yourself with the safety symbols in Figure 1. When you see
these symbols on this product, they warn you of the potential danger of electric
shock if the station is used improperly. They also refer you to important
operating and maintenance instructions in the manual.
KB-702/KB-702GM TWO-CHANNEL SPEAKER STATIONS
iii
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
This symbol alerts you to the presence of uninsulated dangerous
voltage within the product's enclosure that might be of sufficient
magnitude to constitute a risk of electric shock. Do not open
the product's case.
This symbol informs you that important operating and maintenance instructions are included in the literature accompanying
this product.
Figure 1: Safety Symbols
EMC AND SAFETY
The KB-702 and KB-702GM stations meet all relevant CE and FCC
specifications set out below:
EN55103-1 Electromagnetic compatibility. Product family standard for audio,
video, audio-visual, and entertainment lighting control apparatus for
professional use. Part 1: Emissions.
EN55103-2 Electromagnetic compatibility. Product family standard for audio,
video, audio-visual, and entertainment lighting control apparatus for
professional use. Part 2: Immunity.
And thereby compliance with the requirement of Electromagnetic
Compatibility Directive 2004/108/EC and Low Voltage Directive 2006/95/EC
This device complies with Part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
iv
KB-702/KB-702GM TWO-CHANNEL SPEAKER STATIONS
1
OPERATION
INTRODUCTION
Congratulations and thank you for choosing this Clear-Com product. The
KB-702 and KB-702GM 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 KB-702 is a two-channel speaker station ideal for theatre, live
performances, industrial applications, and small TV facilities. It features excellent
speech intelligibility even in high-noise environments and can be tailored to your
needs through its programmable options.
In addition, the Clear-Com KB-702GM contains a jack for an optional
Clear-Com gooseneck panel microphone and a close-in, voice-controlled 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 is
electronic momentary or latching. Monitoring can be done through the headset,
the integral speaker, or both at once. The KB-702 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 mics on the KB-702.
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-702 speaker station accepts dynamic headsets. A sidetone control allows
the operator to vary the level of his/her own voice as heard in 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. This feature helps minimize acoustical feedback.
The KB-702 receives 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 four-gang V-box. The extra-thick front panel and compact
surface-mount circuitry maintains legendary Clear-Com ruggedness. The two
intercom channels connect to a plug-on screw terminal strip. Male and female
3-pin XLR connectors are provided on the four-gang V-box for an inline
connection to one of the intercom channels.
KB-702/KB-702GM TWO-CHANNEL SPEAKER STATIONS
1-1
The optional EB7-TW daughter board module can be installed to provide an
KB-702
interface to two intercom channels on a single microphone cable. Also, the
EB7-4W four-wire daughter board module is available to allow long-distance
connections using separate pairs of wire for send audio and receive audio. The
EB7-4W four-wire option supports two-channel operation.
The KB-702 and KB-702GM are compatible with all Clear-Com party-line
intercoms.
OPERATION
Normal operation of the KB-702 speaker station requires access only to the front
panel controls. The controls located elsewhere on the unit are intended to be
set-and-forget in nature. For intercom operation, set the listen level control to the
desired level and press the talk button when talking. If a headset or handset is
used, set the sidetone control for each channel for the desired amount of sidetone
in the earphone. If a hand-held push-to-talk mic is used, or if the panel mic is
used on the KB-702GM, set the sidetone controls for minimum feed-through to
the speaker to prevent acoustic feedback.
FRONT PANEL
The controls, indicators, and connectors found on the KB-702 and KB-702GM
front panels are shown in the following figures and are described by the following
text. The numbers in the left column refer to Figure 1-1 and Figure 1-2.
Headset
Sidetone
2
Call
Talk
5
1
9
Channel Select
A
Volume
Program Level
Off On
Speaker
B
Figure 1-1: KB-702 Front Panel
3
4
2-Channel
Speaker Station
KB-702
7610
1-2
KB-702/KB-702GM TWO-CHANNEL SPEAKER STATIONS
KB-702GM
1211
8
2
9
3
4
Microphone
Headset
10
VOX
Panel Mic
Headset
Sidetone
5
Call
Talk
1
Channel Select
A
Volume
Program Level
Speaker
Off On
B
2-Channel
Speaker Station
KB-702GM
7
6
Figure 1-2: KB-702GM Front Panel
1. Talk Button and Indicator: The talk button activates the microphone feed
to the selected intercom channel. It has a dual action (momentary or latching)
depending upon how the button is pressed. If desired, the latching function
can be defeated using an internal option switch. The following describes the
various functions of this button.
• MOMENTARY: Press and hold the talk button while you are speaking.
Release it when you are finished. The button lights amber when the talk
function is active and blue when it is inactive.
• LATCHING: Press the button quickly to latch the talk function. Press
the button again to turn off the talk function.
• VOX INDICATION: On the KB-702GM, when the VOX feature is
enabled, the talk button illuminates amber to indicate an active talk, and
the VOX light illuminates amber to indicate that the panel microphone
is in use. This will automatically dip the speaker.
2. Call Button and Light: Pressing the call button will send a call signal on the
selected channel. All the call lights on that channel will then flash. Call
signals can also be sent while talking if required. The call button will light
when pressed, or whenever a call signal is present on the selected channel. An
internal option jumper can be set to allow the call button to light when a call
signal is present on either channel.
3. Tone Alert: An audible tone alert can be enabled to sound when a call signal
is received on the selected channel or either channel. This can be useful when
the operator’s attention has been drawn away from the KB-702 indicator
panel. The audible tone alert level can be adjusted or turned off by an
internal control. The tone alert will not sound if a call signal originates at the
KB-702 station or if the speaker on/off switch is turned off. The tone alert
KB-702/KB-702GM TWO-CHANNEL SPEAKER STATIONS
1-3
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