N9927-90003
5-17
FieldFox Analyzer
Theory of Operation
Measurement Group
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.
A7 Real Time Clock Board
The battery for the RTC (real time clock) on the A7 RTC is connected to the A6 SOM board via the A5
System board. The battery powers the RTC when the FieldFox is powered off.
provides instructions for replacing the battery on the A7 RTC board.
Main Battery
The battery is a rechargeable 10.8 V lithium-ion type. Refer to
“Battery Disposal” on page 1-7
for
important information about replacing and disposing of this battery.
Refer to
Summary of Contents for FieldFox MW N9913A
Page 8: ...Contents 4 Service Guide N9927 90003 Contents ...
Page 9: ...N9927 90003 1 1 1 Safety and Regulatory Information ...
Page 16: ...1 8 N9927 90003 Safety and Regulatory Information FieldFox Analyzer Regulatory Information ...
Page 17: ...N9927 90003 2 1 2 General Product Information ...
Page 27: ...N9927 90003 3 1 3 Tests and Adjustments ...
Page 37: ...N9927 90003 4 1 4 Troubleshooting ...
Page 50: ...4 14 N9927 90003 Troubleshooting FieldFox Analyzer Measurement Group Troubleshooting ...
Page 51: ...N9927 90003 5 1 5 Theory of Operation ...
Page 81: ...N9927 90003 6 1 6 Replaceable Parts ...
Page 95: ...N9927 90003 7 1 7 Repair and Replacement Procedures ...
Page 140: ...7 46 N9927 90003 Repair and Replacement Procedures FieldFox Analyzer Post Repair Procedures ...
Page 141: ...N9927 90003 8 1 8 General Purpose Maintenance and Service Procedures ...
Page 149: ...N9927 90003 Appendix 1 Appendix A ...
Page 156: ...Index 4 N9927 90003 Index ...