HP ESA-L1500A User's And Calibration Manual page 112

Key Access:
erases any data previously stored in trace B and continuously displays
Clear Write B
any signals detected during the sweep of the spectrum analyzer.
Changing the trace mode of trace C to clear write or minimum hold can
change the trace mode of trace B. If trace B is in clear-write mode or
maximum-hold mode when trace C is changed to clear write or
minimum hold, the trace mode of trace B is changed to store blank.
The following table shows the trace mode of trace B before and after
changing trace C to clear-write or minimum-hold trace mode.
Changing the trace mode of trace B to clear write or maximum hold can
change the trace mode of trace C. If trace C is in clear-write mode when
trace B is changed to clear write or minimum hold, the trace mode of
trace C is changed to minimum hold.
Key Access:
Chapter 4
Trace Mode of Trace C
Before
Clear write
Minimum hold
View
Trace
Trace Mode of Trace B
Before
Clear write
Maximum hold
View
Trace Mode of Trace C
Before
Clear write
Minimum hold
View
Trace
Front-Panel Key Reference
Trace Mode of Trace C
After
Minimum hold
Minimum hold
View
Trace Mode of Trace B
After
Blank
Blank
View
Trace Mode of Trace C
After
Minimum hold
Minimum hold
View
Trace
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