Fig. 4
From: High-energy electron experiments (HEP) aboard the ERG (Arase) satellite
Functional block diagram of HEP instrument. The three HEP-L and HEP-H SSD modules are controlled independently by two control boards. A central processing unit (CPU) board receives command packets and sends telemetry data to the mission network. The CPU board collects histogram data from the control boards in addition to instrument-status data. The bias voltage of the SSDs is supplied from a high-voltage–power supply board that includes two independent high-voltage DC–DC convertors, with the power and reference voltage controlled by the control boards