ATR500 / P/N 500-(0XX)-(0XX) / 500-(1XX)-(1XX)
Operation and Installation
22
Dokument-Nr.: 01.1251.010.71e / Revision: 2.01
3.6 Equipment
Connections
One 15 pin D-SUB miniature connector includes all electrical
connections, except for the antenna
3.6.1 Microphone-Connection
The device contains two microphone inputs:
MIC 1: switchable („Mic.Setting“ Switch at the right hand side) for
•
Standard - Microphones (factory setting)
•
Dynamic Microphones
MIC 2: only for Standard-Microphones
The input for standard microphones is appropriate for input voltages of
50 mVpp to 2 Vpp. This input has a bias voltage of 8 V at 330 ohms.
Sensitivity is adjustable in the init menu with MIC.
The input for dynamic microphones is appropriate for input voltages of 5
mVpp to 10 mVpp. This input has no bias. Use microphones of the same
type, as the settings described in the following are always concerning
both microphone inputs.
3.6.2 Headset-Connection
Headphones may be connected parallel as long as the total impedance
doesn’t fall below 8 Ohm.
The (+UB)-wire has to protected by circuit breaker (2 Amp.)!
Check setting of the MIC switch on the right side of the radio
BEFORE mounting! (Factory setting: standard microphone)
A maximum of two microphones may be connected parallel
per microphone input.
