Tait tm8200 Accessories Manual

TM8100/TM8200 Accessories Manual TMAA10-01 Desktop Microphone 117
© Tait Electronics Limited August 2005
.
14.5 Circuit Description
The desktop microphone uses a dynamic microphone capsule and contains
a pre-amplifier (Q1) to boost the microphone level to that required by the
radio. Power for the pre-amplifier is provided by the electret microphone
bias circuit within the radio. R5 is used to adjust the gain.
PTT and hookswitch signals are combined onto one line and fed to the
control head PTT input of the radio.
Figure 14.2 Desktop microphone to radio interface

Tait tm8200 Specifications

General

Operating Temperature Range	-30°C to +60°C
IP Rating	IP54
Channel Spacing	12.5 kHz, 25 kHz
Battery Life	N/A (Mobile Radio)
Frequency Range	136-174 MHz, 400-470 MHz