HP 3562A Operating Manual page 365

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X
X-activates the X (horizonta l ) marker and displays its menu. When active, theX marker appears
as an intensified dot which is moved across the acti v e trace(s) with the Markers knob.
M arker bands can also be activated to identify portions of the trace and to make rela­
tive measurements. You can enter X marker values immediately after pressing the
key. See the description of the X VALUE key for details.
HOLD X CENTER-used to mark off a band on the horizontal axis of the display.
HOLD X LEFT-used to mark off a band on the horizontal axis of the display. When
HOLD X OFF-performs one of two functions: 1) If one of the three HOLD X modes is
HOLD X RIGHT --used to mark off a band on the horizontal axis of the display. When
SCROLL ON OFF-allows the entire trace to be scrolled through a magnifying ' 'win­
1 2-76
When HOLD X CENTER is active, the marker splits and expands sym­
metrically around its original position as you rotate the Markers knob. The
band can be expanded or contracted as long as HOLD X CENTER is
active. When HOLD X OFF is pressed after a band has been marked, the
band remains the same size but moves across the display when you turn
the knob. To erase a band, press HOLD X CENTER, turn the knob coun­
terclockwise until the band retracts to a single line, then press HOLD X OFF.
HOLD X LEFT is active, the marker splits and expands to the right of its
original position as you rotate the Markers knob. The band can be
expanded or contracted as long as HOLD X LEFT is active. When HOLD X
OFF is pressed after a band has been marked, the band remains the same
size but moves across the display when you turn the knob. To erase a band,
press HOLD X LEFT, turn the knob counterclockwise until the band retracts
to a single line, then press HOLD X OFF.
active and a band has been expanded, pressing HOLD X OFF disables
any further expansion or contraction of the band. Once this happens, turn­
ing the knob moves the band across the display in the same manner as the
single X marker. 2) If one of the three HOLD X modes is active and the band
has been contracted to a single line, pressing HOLD X OFF erases the
band and deactivates the HOLD X mode.
HOLD X RIGHT is active, the marker splits and expands to the left of its
original position as you rotate the M arkers knob. The band can be
expanded or contracted as long as HOLD X RIGHT is active. When HOLD
X OFF is pressed after a band has been marked, the band remains the
same size but moves across the display when you turn the knob. To erase a
band, press HOLD X RIGHT, turn the knob clockwise until the band retracts
to a single line, then press HOLD X OFF.
dow" defined by a HOLD X band. To use scrolling, press SCROLL ON,
then outline a band using HOLD X CENTER, RIGHT or LEFT. Press HOLD
X OFF then X MRKR SCALE to expand the trace inside the band. Rotating
the Markers knob now scrolls the trace through the "window" outlined with
the marker band. Please refer to "Using the Markers" in Chapter 8 for an
illustrated example of scrolling.
X