1-14 PRODIGIT
The load current level and load status are received from front panel of 33501, the two 12 bit
D/A converter receive digital data of load current and transfer as an analog signal, the load
current slew rate is controlled by the two 8 bit D/A converters, the Thigh and Tlow duration is
set by two 16 bit trimmer, these six parameters constitute the wide range pulse generator,
and can be used to test the power supply. (Unit under Test)
The Constant Current (CC), Constant Resistance (CR), and Constant Voltage (CV) control
circuitry and Constant Power (CP) Constant and range circuitry is selected depending upon
which operating mode and range.
The drive circuit controls the load current flow through power MOSFET is proportional to the
analog control signal. The Short ON/OFF signal through short drive circuit turns the Power
MOSFET fully ON.
The voltage Auto-sensing circuit selects the Load input terminal or Vsense BNC input
depends on the Vsense cable is connected or not. The Auto ranged 4 1/2 high accuracy digit
voltage meter indicates the input voltage.
The 4 1/2 digit voltage meter and 4 1/2 digit current meter digital bus is connected to CPU
circuitry.
