Agilent Technologies 54503A User's Guide download pdf (Page 248)

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248 Chapter4

Key Function Descriptions

Key Descriptions

If a single marker is already on, MARKER DELTA

places both an anchor marker and an active (movable)

marker at the position of the original, single marker. To

move the active marker, use either the knob, the step

keys, or the data keys. If two markers are already on,

pressing MARKER DELTA once makes it the active

function. However, if MARKER DELTA is already the

active function, pressing MARKER DELTA places the

anchor marker at the same position as the active

marker. The delta amplitude is displayed in dB, or as a

ratio when linear units are selected.

Front-panel key access:

AUX CTRL, FREQ COUNT, MKR,

PEAK SEARCH

MARKER NORMAL Activates a single marker and places it at the center

of the trace. This softkey location is changed to the

MARKER DELTA function, if delta-marker mode has

been previously activated by the MARKER DELTA

softkey under the

MKR menus.

If one marker is already on, no operation takes place. If

two markers are on (as in MARKER DELTA mode),

MARKER NORMAL deletes the anchor marker and

makes the active one the new, single marker. The

marker reads the amplitude and the frequency (or the

relative time, when the frequency span equals 0 Hz),

and displays these values in the active function block

and in the upper-right corner of the display. To move

the marker, use either the knob, the step keys, or the

data keys.

The marker reads data from the currently active trace.

(An active trace is one in either the clear-write or

max-hold mode; this may be either trace A or trace B.)

If both traces are active, or if both traces are in view

mode, the marker reads data from trace A.

Front-panel key access:

AUX CTRL, FREQ COUNT, CAL,

MKR

MARKERS OFF Turns off all markers, blanks the softkey menu, and

expands the display screen. This softkey turns off all

marker-related functions such as SIG TRK ON OFF

and MKRNOISE ON OFF, if they are on.

Front-panel key access:

MKR

MAX HOLD A Displays and holds the maximum responses of the

input signal in trace A. In this mode, the trace accepts

data from subsequent sweeps and selects the

positive-peak detector mode.

Front-panel key access:

TRACE

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