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The TRGRPH command displays a trace A, B, or C, or a user-defined trace anywhere on the spectrum analyzer
display. The X and Y positions orient the trace above and to the right of a point on the CRT specified by the
display address. The trace can be expanded, according to the scale determined by the expanding factor.
For example, the following command would display a user-defined trace named TEST occupying the length of the
CRT at the base line, if TEST was originally full-scale, and was compressed by 10 with the COMPRESS com-
mand:
Note that the above TRGRPH command fills display addresses Id through 1000 with the amplitude information of
the TEST trace array. Thus, any original trace A information is lost.
The program below moves trace A data into a user-defined trace array, called TEST then positions TEST 100
display units above the CRT baseline.
20
30
40
50
E N D
Line 10:
Sets up an active trace.
Line 20:
Defines user-defined trace array.
Line 30:
Moves trace A into array
Line 40:
Display array, filling display addresses allocated for trace A.
To reposition traces A, B, and C without the use of a user-defined trace array, substitute the letter I for the display
address.
TRACE
EXPAND I NG
TRGRPH
Trace Graph
Programming 343
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