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Theory of Operation
3 2
Digital to Analog Converter (DAC) (A11 D/A Board)
This functional block is a 12 bit high speed digital to analog converter. It
converts the digital data from the waveform memory into analog signals.
Analog Processing (A3/A23 Analog Board)
This analog processing block amplifies the analog signals from the DAC to
the necessary amplitude. If an offset is specified, this circuit adds that offset
and outputs the result at the output connector for that channel. This circuit
also contains a filter, an AM modulator, and other elements that modify
waveform output. Its output impedance is 50 W.
CPU and Memory (A6 CPU Board)
This functional block directs operation of all internal circuits, based on front
panel control operation and commands received over the GPIB or RS 232 C
interface. This circuit includes the 68000 CPU, DRAM, EPROM, SRAM. Data
in memory is retained by a lithium battery on the A5 Backplane board.
To avoid losing waveform data files stored in NVRam, save the files
to a floppy disk before removing the A6 CPU board or A5 Back
plane board. Then restore the files from floppy disk to AWG2005
NVRam after reinstalling the board(s).
GPIB (A6 CPU Board)
This functional block is the General Purpose Interface Bus (GPIB) interface
driver, which controls communication with external devices over the parallel
interface. The GPIB connector is on the rear panel.
RS 232 C (A6 CPU Board)
This functional block is the RS 232 C interface circuit which controls serial
communication with external devices over the RS 232 C interface. The
RS 232 C interface connector is on the rear panel.
Display Control (A6 CPU Board)
The display control block processes the test and waveform information
based on commands from the processor. The block sends the text and
waveform information to the display monitor as video signals with vertical
and horizontal sync control.
CAUTION
Theory of Operation
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Troubleshooting
