Clear-Com, HB-704, 4-Channel Remote Headset Station

Description

4-Channel Remote Headset Station
Momentary/Latching Talk switch with LED
Microprocessor controlled logic and switching
Visual call signaling
Headset connector with volume control and sidetone adjust
Optional 4-wire or TW daughter boards for flexibility
Mountable into a standard US two-gang outlet box

Technical Specifications

Headset Microphone Input
Input Type :Dynamic
Input Impedance: >= 1K
Mic Limiter Threshold: -2dBu ± 3dB
Mic Limiter Range: >= 15dB

Program Line Input
Input Impedance: >= 5K

Headset Output
Load Impedance: >= 8
Output Impedance: <= 25
Output Limiter Threshold: +5dBu ± 3dB
Maximum Output Level before Distortion: >= 17dBu

Partyline Output
Off Noise: < -74dBu
Output Impedance: >10K

Partyline Input
Crosstalk: < -60dB
Max level before Clipping: >= 12dBu

Frequency Response
Headset Mic – Partyline: 300 – 15KHz ± 3dB
Partyline – Headset Out: 300 – 15KHz ± 3dB

Max Distortion
Headset Mic – Partyline: <= 0.5%
Partyline – Headset Out: <= 0.2%

Noise
Headset Mic – Partyline: < -70dBu
Max Gain
Headset Mic – Partyline: 41dB ± 2dB
Partyline – Headset Out: >= 34dB

Power
Input Voltage Range: 20-30 VDC
Input Current (Idle):<= 50mA
Input Current (Max):<=100mA

Internal Adjustments and Connections
Intercom Line: Seven terminal connector
Option Switches: Two DIP switches
Option Board Jumper: Two sets of options jumpers

Environmental
32 – 122°F (0 – 50°C)

Dimensions

4.5 x 4.6 1.75 in (HxWxD)
(114 x 117 x 44 mm)

Weight
0.46 lb (0.21 kg)