Keysight N1913, Service Manual

Page: 69 / 141

Theory of Operation 4
Keysight N1913/1914A Service Guide 69
Main Board Assembly
Purpose
– Provides the average measurement path(s)
– Provides external trigger input/output and recorder output(s)
– Provides the driver and the LVDS serialiser for the LCD display
– Provides signal routing between the PPMC and front panel
Inputs
– Power supplies [from PSU]
– Sensed power level(s) [from sensor flex(s)]
– Trigger input [from external equipment]
– Control, address, and data lines [from PPMC]
Outputs
– Processed average path measurement [to PPMC]
– Trigger output and recorder output(s) [to external equipment]
– LVDS LCD display control lines [to front panel]
– Control and data lines [to PPMC]