Clear Com 4-Wire Interface

Clear Com 4-Wire Interface
The 4-Channel 3- or 4-Wire Camera Interface Rack Mount (1RU), provides 4 discrete Clear-Com to 3- or 4-wire interface circuits. The four channel interface connects Clear-Com to TV cameras, two-way radios, satellite links, and other communications devices through either their headset jacks or 4-wire circuits. IF4W4 has selective party-line capability. Features individual transmit, receive, and null controls, as well as transmit level indicators and switchable mic or line-level output for compatibility. The built-in test jack and test tone provide quick nulling.

Technical Specifications:

Clear-Com Format:

• Program Line Input Impedance : >= 1KΩ
• Party-line Output Impedance: >10KΩ

Stage Announce/Balanced Line Out:

• Type: Balanced
• Output Impedance: >= 80Ω
• Load Impedance: >= 600Ω

Frequency Response:

• Program Input - Party-line: 200 - 18KHz ± 3dB
• Party-line - Line Out: 200 - 18KHz ± 3dB

Max Distortion:

• Program Input - Party-line: <= 0.2%
• Party-line - Line Out: <= 0.5%

Noise:

• Program Input - Party-line: < -85dBu
• Party-line - Line Out: < -60dBu

Max Gain:

• Program Input - Party-line: >= -16dB
• Party-line - Line Out: >= 24dB

Min Gain:

• Program Input - Party-line: <= -20dB
• Party-line - Line Out: <= -45dB

Line Out LED Threshold:

• Green: -7dBu ± 2dB
• Red: +5dBu ± 2dB

Party-line LED Threshold:

• Green: -10dBu ± 2dB
• Red: 0dBu ± 2dB

Power:

• Input Voltage Range: 20-30 VDC
• Input Current (Idle): <= 40mA
• Input Current (Max): <= 50mA

Rear Panel Connectors:

• Intercom: (4) XLR-3F (1 per channel)
• 4-Wire Terminal Block Connectors: (4) Connectors (1 per channel)
• 4-Wire Transmit Level Switches: (4) Switches (1 per channel)

Front Panel Connectors:

• Headset: (1) XLR-4M
• TS1 Earphone: (1) 3.5mm Jack Socket
• Front Panel Controls & Indicators:
• Green Level LED: (4) LEDs (1 per channel)
• Red Level LED: (4) LEDs (1 per channel)
• Link LED: (4) LEDs (1 per channel)
• Power LED: (4) LEDs (1 per channel)
• Null Test Button: (4) Buttons (1 per channel)
• Receive Level Adjust: (4) In controls (1 per channel)
• Transmit Level Adjust: (4) Out controls (1 per channel)
• Nulling Adjust: (12) Null controls (3 per channel)
• Channel Link Switch: (3) Link switches (A+B, A+C, A+D)
• Environmental: 32 - 122˚F (0 - 50˚C)
• Dimensions: 19 in. W x 1.75 in. H x 7.75 in. D (483 mm x 44.5 mm x 197 mm)
• Weight: 5.83 lbs. (2.65 Kg)