4 Theory of Operation
68 Keysight N1913/1914A 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 and front panel]
– LAN/USB communications [from external equipment]
– GPIB communications [from external equipment, via main board]
Outputs
– Control address and datalines [to main board and front panel]
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