Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide 159
Front Panel Assembly
Assembly Overview
The Rotary Pulse Generator (RPG) is also located on the A6A4 Keyboard
assembly. As the RPG is rotated it generates pulses. The faster it is rotated the
narrower the pulses it generates. The pulses are routed to the keyboard
controller on the A6A1 Front Panel Interface board, and then to the A5 CPU
assembly via the USB hub located on the A6A1 Front Panel Interface board.
The RF On/Off, Mod On/Off, and More status LEDs on the A6A4 Keyboard
assembly are controlled by the keyboard controller on the A6A1 Front Panel
Interface board, which is controlled by the A5 CPU assembly via the USB hub
on the A6A1 Front Panel Interface board.
The A6A4 Keyboard assembly connects to the A6A1 Front Panel Interface
board via ribbon cable W3.
USB Interface
The two Type-A USB 2.0 connectors on the front panel of the instrument are
attached to the A6A2 USB Interface assembly. The A5 CPU assembly
communicates with the A6A2 USB Interface assembly via the USB hub on the
A6A1 Front Panel Interface board.
The A6A2 USB Interface assembly connects to the A6A1 Front Panel Interface
board via ribbon cable W2.
Front Panel Interface
The part number and serial number of the A6A1 Front Panel Interface assembly
installed in an instrument can be seen on the Utility, Instrument Info, Installed
Board Info screen, as shown in Figure 7-1.
Figure 7-1 Installed Board Info Screen
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