Direction Function
J1-24 /MIKE_SW IN Audio configuration selector input
J1-25 /ON IN External Power ON input
LO active - closed contact to GND
2.4.2 Inputs / Outputs Detailed Description
Microphone Connection – Carbon Microphone Standard
Pin No. AR6201 Pin Name Direction Function
P1-8 MIKE_STD_LO - Standard Microphone LO
(ground/return)
P1-18 MIKE_STD_HI AF IN / DC OUT Standard Microphone (HI)
For interfacing with standard microphone the transceiver has an
unbalanced input with an input impedance of 110 Ohm and a nominal
sensitivity of 110 mV. This sensitivity level can be adjusted in the
Installation Setup from 9 mV to 1500 mV. The power supply delivered from
pin 18 for supply of the connected microphone(s) is > 8 V DC (8.3 V
nominal) open circuit.
Note: Sensitivity range 25 mV to 1000 mV was qualified under
environmental conditions
For all popular aviation microphones the power supply is capable to
supply two microphones in parallel.
Care should be taken to combine only microphones of the same type /
impedance.
It is highly recommended to mount the jacks isolated from aircraft frame
in order to avoid ground loops.
Microphone Connection - Dynamic Microphone
Pin No. AR6201 Pin Name Direction Function
P1-5 MIKE_DYN_HI IN Balanced input for dynamic
microphone(s)
P1-6 MIKE_DYN_LO IN Balanced input for dynamic
microphone(s)
For interfacing with dynamic microphone the transceiver has a balanced
input with an impedance of 140 Ohm and a nominal sensitivity of 3.5 mV.
This sensitivity level is adjustable in the Installation Setup from 0.5
mV to 25 mV.
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