NF HVA4321, Instruction Manual

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1.2 Function description and block diagram
HVA4321
1-3
1.2 Function description and block diagram
1.2.1 Function description
Major functions of this unit are classified into the following:
・
Signal system
・ Amplifier stage
・
Detection system
・ High voltage power supply
・
External control system
Signal system
The following three types of signals can be used as the signal sources:
・
Signal source built into the unit that gives the DC output (DC BIAS)
・ Signal from external oscillator (OSC INPUT)
・
Signal from external DC signal source (EXT DC BIAS INPUT)
These signals can be used simultaneously. Signal is internally added and the input is given to the
amplifier stage.
Amplifier stage
Input signals are separated into positive and negative signals, and each signal is transmitted to
the high voltage amplifier stage through an optical fiber.
Detection system
Output voltage and output current are correctly detected by independently detecting and
combining DC and AC components.
High voltage power supply
The unit is using ± 12 kV power supply to obtain the output of 10 kVpk. This power supply can
be individually turned ON/OFF for safety.
External control system
The signal source can be turned ON/OFF with an external contact signal or TTL level signal.