Chapter 3: Technical description3-6 98-144591-D
3.11.1 Power Amplifi er Protection
The protection of the power amplifi er consists of V+I protection, SWR protection, and thermal protec-
tion. When the output signal of the voltage detector at the output of the power amplifi er exceeds 10
V the output power is reduced to a safe level. The thermal protection consist of a temperature sensor
on the power amplifi er. The available power supply voltage is measured in the DC power supply and
the information is transferred to the ECM module. If the supply voltage drops the microprocessor will
adjust the output power to keep distortion below the limits.
3.11.2 Antenna Tuning Unit Protection
The ATU is protected by several detectors all monitored by the ATU's microprocessor, which calculates
the SWR, temperature, maximum voltage and current. If these parameters are not below safe operating
limits it requests for lower power.
Technical description
To Next Page
Loading...
Need help?
General
