User manual

Garrecht Avionik GmbH TRX-1500 ADS-B Traffic Monitor User Manual
Revision: 1.0a 19 31 JAN 2012
2.4.5. Audio interface
The TRX-1500 comes with an audio interface to provide audible warnings additionally.
Electrical specifications:
Impedance: 8 Ohms
Voltage Level: appr. 3 V (VSS)
A small speaker can be connected directly to this interface. If the cockpit noise level is to high and if
using a headset, connecting the audio signal of the TRX-1500 to a audio panel or Line-in interface of a
radio or intercom is requried.
Refer to the radio’s or intercom’s installations manual for detailed information, how to hook up external
audio sources properly.
In some cases, connection of the TRX-1500 to your audio panel or Line-in interface of your radio
requires impedance matching.
Connecting a TRX-1500 to a Line-in interface:
• Use a voltage divider
Connecting a TRX-1500 to a avionic audio panel (Input Impedance: 500 Ohms)
Units with automatic impedance matching: direct connection (conceivably)
Unist without automatic impedance matching: Connection via impedance matching
transformer (i.e. Conrad Electronic P/N
515 952
Always consult the manuals before connecting the TRX-1500
to avoid
damages to the units caused by exceeding the maximum specified input
level
Consult your avionics workshop for addtional information.