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APPENDIX A
This appendix describes the spectrum analyzer display memory A summary of trace data manipulation by the
trace mode functions is also included.
The display memory is defined as the digital storage allocated in the spectrum analyzer for the information that is
presented on the CRT display. It comprises four different memories: three trace memories and one annotation
memory. Addresses are assigned as follows:
DISPLAY MEMORY
TRACES
The trace pages are used primarily to store analyzer response data to be displayed. Use is not restricted to the
storage of trace data. Operator defined graphics and annotation can also be written into the memory for display on
the CRT
Each trace address may contain an integer from 0 to 4095. When drawing, trace values from 0 to 1023 are plotted
on the CRT display as amplitude y position, in display units. Appendix B discusses these values in detail.
Appendix A
Page 1
Trace A
Page 2
Page 3
Graticule
and
Annotation
Page 4
Trace C
DISPLAY MEMORY STRUCTURE
ADDRESSES
1023
10 2 4
2 0 4 7
2 0 4 8
I
3071
3 0 7 2
A p p e n d i x 1
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