Technical data

4 Theory of Operation
42 N1911A/1912A P-Series Power Meters Service Guide
PPMC Assembly
Purpose
• Provides the main processor and memory for the power meter
• Provides external interfaces for LAN and USB
• Stores the power meter firmware in flash EEPROM
• Stores the power meter serial number and option data
Inputs
• Power supplies [from PSU, via main board]
• Control and data lines [from main board, DAP(s), and front panel]
• LAN/ USB communications [from external equipment]
• GPIB communications [from external equipment, via main board]
Outputs
• Control, address, and data lines [to main board, DAP(s), and front
panel]