HP ESA-L1500A User's And Calibration Manual page 39

Getting Started
Screen Annotation
Item 24 refers to the trigger and sweep modes of the spectrum analyzer.
The first letter (''F") indicates the spectrum analyzer is in free-run
trigger mode. The second letter (''C") indicates the spectrum analyzer is
in continuous-sweep mode.
Item 25 refers to the trace modes of the spectrum analyzer. The first
letter (''W") indicates that the spectrum analyzer is in clear-write mode.
The second letter is "A," representing trace A. The trace B trace mode is
"SB", indicating trace B (''B") is in the store-blank mode (''S"). The trace
mode annotation for trace C is displayed under the trace mode
annotation of trace A. The trace C trace mode is "SC", indicating trace C
(''C") is in the store blank mode (''S").
Refer to the following table for the screen annotation codes for trace,
trigger, and sweep modes.
Table 2-2 Screen Annotation for Trace, Trigger, and Sweep Modes
38
Item Description
24 Trigger
25 Trace mode
26 Video average
27 Display line
28 Amplitude offset
29 Amplitude scale
Trace Mode
W clear write (traces
A/B/C)
M maximum hold (traces
A/B)
V view (traces A/B/C)
S store blank (traces
A/B/C)
M minimum hold (trace C)
Function Key
Trig
Trace
Video Average On Off
Display Line On Off
Ref Lvl Offst
Scale Type Log Lin
Trigger Mode
F free run
L line
V video
E external
Sweep Mode
C continuous
S single sweep
Chapter 2