HP ESA-L1500A, User'S And Calibration Manual

Page: 87 / 326

86 Chapter 4
Front-Panel Key Reference
Marker
Marker # On Off
turns the selected marker on or off. The marker which is currently
selected by the
Select Marker 1 2 3 4
key, will be turned on or off. When a
new marker is turned on by pressing
Marker # On Off
, the
Marker Trace
Auto A B C
function always switches to
Auto
and the marker is put on
the trace that is selected by the Auto mode. Key Access:
Marker
Marker Noise On
Off
reads out the average noise level, referenced to a 1 Hz noise power
bandwidth. If no marker is present, a marker appears at the center of
the display. The root-mean-square noise level (the mean value of the
32 display points about the marker) normalized to a 1 Hz noise power
bandwidth, is read out. The sample detector is activated. If Marker
Noise is turned On while a Marker
∆
is selected, the signal-to-noise
level is measured. Key Access:
Marker
Mkr Readout
accesses a menu which allows you a selection of specific marker
information. The selections include
Frequency
,
Period
,
Time
, and
Inverse
Time
. Key Access:
Marker
Marker All Off
turns off all of the markers, including markers used for marker track
and demodulation. Marker annotation is also removed.
Key Access:
Marker
Marker Trace Auto
A B C
assigns a marker to a trace. Pressing
Marker Trace Auto A B C
will
activate a marker on trace A if there are no markers turned on. If a
marker is currently active, press
Marker Trace Auto A B C
until
A
,
B
, or
C
are underlined. The active marker will be moved to the selected trace.
Selecting the
Auto
mode will move the marker to the trace that is
automatically selected. The selection order is to first look for a trace in
the clear-write mode, in the order of trace A, then trace B, then trace C.
If no traces are currently being written, it will select a trace in the
view-store mode, again in the order of trace A, B, then C.
Key Access:
Marker
,
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