Theory of Operation
Introduction
2
2-3
2-1. Introduction
This chapter provides a block diagram discussion of the calibrator’s analog and digital
sections. Figure 2-1 shows the arrangement of assemblies inside the 5500A. The
Oscilloscope Calibration Option is described in the Options chapter.
The 5500A produces calibration outputs of the following functions and ranges:
• DC voltage from 0 V to ±1000 V.
• AC voltage from 1 mV to 1000 V, with output from 10 Hz to 500 kHz.
• AC current from 0.01 µA to 11.0 A, with output from 10 Hz to 10 kHz.
• DC current from 0 to ±11.0 A.
• Resistance values from a short circuit to 330 MΩ.
• Capacitance values from 330 pF to 1100 µF.
• Simulated output for three types of Resistance Temperature Detectors (RTDs).
• Simulated output for nine types of thermocouples.
Main CPU (A9)
Filter (A12)
Voltage (A8)
Current (A7)
DDS (A6)
Synthesized Impedance (A5)
Oscilloscope Calibration Option (A4)
Encoder (A2)
Keyboard (A1)
Motherboard (A3)
FRONT
om003f.eps
Figure 2-1. 5500A Internal Layout
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