A6 Som Board; Main Battery - Keysight N9923A Service Manual

Theory of Operation
Measurement Group
LAN Connector
The LAN connector supports the LAN interface on the A6 SOM board. See
"LAN Interface" on page 5-25
SOM Connector
Refer to
Module) functions.

A6 SOM Board

The A6 SOM (System on Module) board plugs directly into the A5 system board
as a daughter board and contains:
— the CPU,
— 64 MB of flash ROM,
— 128 MB of RAM,
— real time clock, and
— I/O interface.
The interfaces on the SOM are:
— UART to the System Monitor on the A5 system board
— LCD interface
— Left and right audio outputs
— SD card bus
— USB host interface
— Interface to USB hub
— LAN interface 10/100 base T
— General purpose interface lines
The A6 SOM board is powered by the 3.3 volt digital supply.
Licenses which enable instrument options are stored in the A6 SOM flash ROM.

Main Battery

The battery is a rechargeable 10.8 V lithium-ion type. Refer to
Disposal" on page 1-8
disposing of this battery.
Refer to
battery.
5-14
"A6 SOM Board" on page 5-13
for important information about replacing and
"Battery Related Information" on page 5-16
for more details.
for information on SOM (System on
Keysight N9923A Service Guide
"Battery
for details on the main