TW-12C
Clear-Com
TW-12C
Clear-Com TW-12C System Interface
This unique device completely eliminates hums and buzzes caused by ground loops. It compensates not only for level differences between systems, but for varying impedances caused by transformers and capacitance on the lines.
This device provides an electrically isolated interface between the two intercom systems. Either “side” of the interface can connect to a Clear-Com intercom system or an RTS intercom system, allowing Clear-Com-to-Clear-Com, Clear-Com-to-RTS, and RTS-to-RTS combinations.
In addition, the TW-12C passes through and translates “call” signals, Clear-Com-to-RTS and vice versa. The interface consists of two identical, 2-wire-to-4-wire hybrid networks which break the ground loops that occur when two systems are run from separate power sources. The audio paths are transformer-coupled and the signaling circuits are opto-isolated.
This device provides an electrically isolated interface between the two intercom systems. Either “side” of the interface can connect to a Clear-Com intercom system or an RTS intercom system, allowing Clear-Com-to-Clear-Com, Clear-Com-to-RTS, and RTS-to-RTS combinations.
In addition, the TW-12C passes through and translates “call” signals, Clear-Com-to-RTS and vice versa. The interface consists of two identical, 2-wire-to-4-wire hybrid networks which break the ground loops that occur when two systems are run from separate power sources. The audio paths are transformer-coupled and the signaling circuits are opto-isolated.
Product Weight: 5.63 lbs
Dimensions: 19"W x 7.25"D x 1.75"H
Technical Tools
PDF Documents
Manufacturer Specs
CLEAR COMM Format
Line Characteristics
Max Level Before Clipping: ≥3dBu
Impedance: ≥10KΩ
Signalling
Receive: ≤4 VDC
Send: ≥11VDC
RTS Format
Line Characteristics
Max Level Before Clipping: ≥5dBu
Impedance: ≥10KΩ
Signalling Tone
Send frequency: 20kHz ±100Hz
Receive frequency: 20kHz ±500Hz
Send level: ≥-6dBu
Receive level: ≤-25dBu
General Characteristics
Frequency response, Party Line - Party Line: 200-8KHz
Distortion, Party Line - Party Line: ≤0.2%
Max Gain
ClearCom - RTS: ≥9dB
ClearCom - ClearCom: ≥4dB
RTS - ClearCom: ≥-1dB
RTS - RTS: ≥4dB
Min Gain
ClearCom - RTS: ≤1dB
ClearCom - ClearCom: ≤-4dB
RTS - ClearCom: ≤-9dB
RTS - RTS: ≤-4dB
Power Requirements
Input Voltage Range: 20-30VDC
Input Current (average): ≤50mA
Rear Panel Connectors
Rear panel
(2) XLR3M (1 per channel)
(2) XLR3F (1 per channel)
Front Panel Connectors
Headset: (1) XLR4M
TS1 Earphone: (1) 3.5mm Jack Socket
Front Panel Controls and Indicators
Power: (2) Green LED (1 per channel)
Null Test Button: (2) Buttons (1 per channel)
Gain Level Adjust: (2) Controls (1 per channel)
Null Adjust: (6) Controls (3 per channel)
Connection Type Switch: (2) Switches (1 per channel)
Pin Connection Select Switch: (2) Switches (1 per channel)
Line Characteristics
Max Level Before Clipping: ≥3dBu
Impedance: ≥10KΩ
Signalling
Receive: ≤4 VDC
Send: ≥11VDC
RTS Format
Line Characteristics
Max Level Before Clipping: ≥5dBu
Impedance: ≥10KΩ
Signalling Tone
Send frequency: 20kHz ±100Hz
Receive frequency: 20kHz ±500Hz
Send level: ≥-6dBu
Receive level: ≤-25dBu
General Characteristics
Frequency response, Party Line - Party Line: 200-8KHz
Distortion, Party Line - Party Line: ≤0.2%
Max Gain
ClearCom - RTS: ≥9dB
ClearCom - ClearCom: ≥4dB
RTS - ClearCom: ≥-1dB
RTS - RTS: ≥4dB
Min Gain
ClearCom - RTS: ≤1dB
ClearCom - ClearCom: ≤-4dB
RTS - ClearCom: ≤-9dB
RTS - RTS: ≤-4dB
Power Requirements
Input Voltage Range: 20-30VDC
Input Current (average): ≤50mA
Rear Panel Connectors
Rear panel
(2) XLR3M (1 per channel)
(2) XLR3F (1 per channel)
Front Panel Connectors
Headset: (1) XLR4M
TS1 Earphone: (1) 3.5mm Jack Socket
Front Panel Controls and Indicators
Power: (2) Green LED (1 per channel)
Null Test Button: (2) Buttons (1 per channel)
Gain Level Adjust: (2) Controls (1 per channel)
Null Adjust: (6) Controls (3 per channel)
Connection Type Switch: (2) Switches (1 per channel)
Pin Connection Select Switch: (2) Switches (1 per channel)