Clear Com KB-702 2 Channel Wall Mounted Remote Headset Speaker Station Intercom

Clear Com KB-702 2 Channel Wall Mounted Remote Headset Speaker Station Intercom

The KB-702 remote speaker station permits the user to select between two channels of party-line communications, with the ability to talk and/or listen on the selected channel. The user can listen via the integral speaker, or may use a headset or telephone-style handset - and can talk via a headset mic, a telephone handset, or a push-totalk microphone.

Microprocessor-controlled logic and switching yields a feature-rich intercom station in a compact format. Electronic switching for the talk button, blue-color LED (on), amber color LED (o ), permits momentary or latching operation. For call signaling, a bright LED lights when a call is activated on a connected intercom channel. A defeatable audible call signal, with level control, is also provided. Separate level controls are provided for intercom level and for balanced program input. A local program source may be fed to the station, allowing the user to monitor that source while remaining in contact on the intercom system. The balanced program input can
also be used in conjunction with the stage-announce output of a main station to provide a paging interrupt, allowing paging at the KB station even if the intercom volume control is turned down.

A set of option dip switches is located at the top of the circuit board. Switches are provided for mic-latch disable (momentary-only talk), long-line operation, channel selection, call signal tracking, and audible call signaling. .

Features:
Talk/Listen from headset mic, telephone handset or push-to-talk microphone
Four modes of operation that are internally programmable via dip switches
Balanced local program input with separate level control
Visual and audible call signaling
Optional 4-wire daughter board for flexibility
Wall or console mountable, or optional V-Box for portable or desktop use
Built-in speaker

Specifications:
Headset Microphone Input
Input Type: Dynamic
Input Impedance: >= 1K
Mic Limiter Threshold: -2dBu ± 3dB
Mic Limiter Range: >= 15dB
Program Line Input
Maximum Level before Clipping: >= 20dBu
Input Impedance: >= 5K
Headset Output
Load Impedance: >= 8
Output Impedance: <= 25
Output Limiter Threshold: +5dBu ± 3dB
Maximum Output Level before Distortion: >= 17dBu
Speaker Output
Load Impedance: >= 4
Max Output Level before 1% Distortion: 20dBu ± 2dBu
Partyline Output
Off Noise: < -74dBu
Output Impedance: >10K
Partyline Input
Crosstalk: < -60dB
Max level before Clipping : >= 12dBu
Frequency Response
Mic – Partyline: 300 – 15kHz ± 3dB
Program Input – Headset Out: 200 – 18kHz ± 3dB
Program Input – Speaker Out: 200 – 18kHz ± 3dB
Partyline- Headset Out: 200 – 18kHz ± 3dB
Partyline- Speaker Out: 200 – 18kHz ± 3dB
Max Distortion
Headset Mic – Partyline: <= 0.5%
Program Input – Headset Out: <= 0.2%
Program Input – Speaker Out: <= 0.5%
Partyline- Headset Out: <= 0.2%
Partyline – Speaker Out: <= 0.5%
Noise
Headset Mic – Partyline: < -70dBu
Program Input – Headset Out: < -60dBu
Program Input – Speaker Out: < -60dBu
Partyline – Headset Out: < -50dBu
Partyline- Speaker Out: < -50dBu
Max Gain
Headset Mic – Partyline: 41dB ± 2dB
Program Input – Headset Out: >= 18dB
Program Input – Speaker Out: >= 24dB
Partyline- Headset Out: >= 34dB
Partyline- Speaker Out: >= 40dB
Power
Input Voltage Range: 20-30 VDC
Input Current (Idle): <= 90mA
Input Current (Max): <=110mA
Internal Adjustments and Connections
Intercom: Line Five terminal connector
Program Input: Three terminal connector
Option Switches: Three DIP switches
Call Signal Jumper3: Three sets of options jumpers
Call Alert Tone Level Control: Level adjustment control
Environmental
32° – 122°F (0° – 50°C)
Dimensions
4.5 x 8.25 x 1.75in (HxWxD)
(114 x 210 x 44mm)
Weight
0.99lb (0.45kg)