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TRACE C MODES
TRACE C MODES
A third trace, C, can be used to store a signal response. Trace C is not swept from the analyzer IF section as are
traces A and B, but is input using a trace B into C function (B + C) or a B and C exchange function (B z C).
Access to the trace C modes is through KEY FUNCTION @ The modes are:
View C:
Blank C:
k
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TRACE ARITHMETIC
TRACE arithmetic allows one trace to be modified by another trace or a display line position.
A-B
A-B
Example
Trace arithmetic with the display line can be used to correct for the frequency response characteristics (flatness) of a
swept measurement system typified by this setup:
where the device under test is to be characterized for insertion loss over a specific frequency range.
The analyzer and source are set to the proper ampli-
tude level and frequency span with the source output
connected directly to the analyzer input.
40 Manual Operation
Displays trace C.
Blanks trace C from CRT display.
Writes trace B into trace C. Trace A and B modes are not changed. If trace C is not
displayed, it remains undisplayed.
Exchanges traces B and C. If trace B is displayed before the exchange, trace C is
now displayed. If trace B is not displayed before the exchange, trace C is not displayed.
Trace B amplitude (measured in divisions from the bottom graticule) is subtracted from
trace A and the result written into trace A from sweep to sweep. Trace B is placed or
kept in a STORE mode.
Turns [.-,-,I off.
Subtracts the amplitude of the display line from trace B and writes the result into trace
B. Trace B is placed or kept in B Details on display line are in Chapter 7, REFER-
ENCE LINE.
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TRACE
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