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The AA38 Series Aircraft Intercom System Local ICS Loop provides intercom functions with operation in Live, VOX, or PTT modes. The units are bulkhead mounted containing all the circuitry required to support a wide variety of ICS Loop applications, particularly isolation/ICS amplifier use, where the output is required to be headset or line level. A switch-selectable NAT/Andrea allows connections to larger audio systems, and an auxiliary input allows for audio input from an audio panel or transceiver.

Version AA38-603 has functions for 4 users with high impedance headsets, individual TX PTT for each user, and transmit function.

• Hi Z local ICS loop – four place intercom with transmit
• 4-MIC inputs – 0.250 mV / 5Ω
• 1-ICS tie lines – 1.6 kΩ (NAT) or 250Ω (Andrea)
• 1-AUX inputs – 1kΩ
• 4 headset outputs 100 mW @ 8 or 600Ω
• Balanced output for high common mode noise rejection
• LIVE, VOX or PTT operation
• Individual TX PTT for each user (ascending priority)