The KB-702GM adds a gooseneck-mic connector and VOX circuitry, for hands-free full-duplex communications without a headset. A switch allows the user to choose between the optional GM-9 or GM-18 microphone and the headset connector. The adjustable sensitivity, close-in VOX feature automatically detects the user's voice at the mic and dips the level of the integral speaker while increasing the gain of the microphone, performing in the opposite manner when listening. The potential for acoustic feedback is minimized while permitting natural conversation levels and dynamics.
Clear-Com KB-702GM Features
- Gooseneck microphone connector with VOX circuitry
- 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
- KB-702GM Encore 2-Channel Remote Speaker Station1
- Panel Microphone Input
- Input Type: Electret
- Input Impedance: >=2K
- Mic Limiter Threshold: -2dBu ±3dB
- Mic Limiter Range: >= 15dB
- 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
- Sidetone Null Capability: > 25dB
- Frequency Response
- Panel Mic – Partyline: 300 – 16kHz ± 3dB
- 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
- Panel Mic – Partyline: <= 0.5%
- 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
- Panel Mic – Partyline: < -65dBu
- Headset Mic – Partyline: < -70dBu
- Program Input – Headset Out: < -60dBu
- Program Input – Speaker Out: < -60dBu
- Partyline – Headset Out: < -50dBu
- Partyline- Speaker Out: < -50dBu
- Max Gain
- Panel Mic – Partyline: >= 37dB
- 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: 20-30V DC
- 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 Jumper 3: Three sets of options jumpers
- Call Alert Tone Level Control: Level adjustment control
- Environmental32 – 122°F (0 – 50°C)
- Dimensions (HxWxD)4.5x8.25x1.75" (114x210x44mm)
- Weight1.1lbs (0.50kg)
