Hitachi EC701HP Operation Manual page 22

Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling - ATSC - High Power
 Power Amplifiers which cover the entire UHF band
 Power transistors LDMOS NXP BLF888A
 Automatic control of the quiescent currents of the power transistors depending on the
temperature.
 Automatic control of rotation of the fan depending on the temperature of the power transistors.
 Protection against VSWR and Overdrive
 Power Factor Corrector (PFC) at power supply (PFC).
 Protection against over current in the power supply.
 Settings and measures via terminal.
 Automatic restart after alarm event.
 Matched sample of the output signal
Manual Rev. 0.1 - February 2018
Figure 1-8 - Block diagram of the power drawer (MOD GV 40001)
RS485
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