Theory of Operation
Digital(to(Analog Converter (DAC) (A11 D/A Board)
This functional block is a 123bit high3speed digital3to3analog 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 RS32323C interface. This circuit includes the 68000 CPU, DRAM, EPROM, SRAM. Data in memory is retained by a lithium battery on the A5 Backplane board.
CAUTION
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 RS32323C interface circuit which controls serial communication with external devices over the RS32323C interface. The RS32323C 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.
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