The H185 transmitter is comprised of four major functional subsystems: the input compressor, the mic preamp/gain control, the compandor, and the RF transmitter (see block diagram below).
The input compressor is a low distortion shunt FET compressor situated before the mic preamp. Control signals for the compressor are derived after the mic preamp to eliminate any possibility of overload under any signal condition up to a maximum of 3 Volts input. The range of limiting action before gross distortion occurs is 20dB.
