Tektronix 1760 - Manual (Page 82)

Using the Menus
1760 Series Component Waveform/Vector Monitor User Manual
3-14
When the gain or position of the signal is changed, the polar
cursors maintain their relationship with the signal.
When CLEAR MENU is pressed, the POLAR / MARK choice on
the right side of the screen will be removed, but the bezel
controls will still be active and cursor measurements can still
be made. When another menu is selected, the bezel controls
may be reassigned to the new menu, but will return to cursor
control when the new menu is deselected.
Markers can be used to highlight graticule points. They
function the same for composite or component signals.
When
MARK is selected, two additional menu readouts ap-
pear. These allow selection of from one to eight markers,
and assign the
AMPLITUDE and PHASE bezel controls to one
of these markers. Markers are designed to be used for refer-
ence points; there is no quantitative readout. Markers are
positioned with respect to the graticule and are not moved or
resized with the signal.
When CLEAR MENU is pressed, all of the marker readout ex-
cept the boxes will be removed. The readout will be restored
when
CURSOR menu is selected again. When CURSOR menu
is exited and re-entered, the selected cursor quantity and
position will be retained. One use of markers is to position
them on the vector target boxes. Adjust the signal source
until the color bar signal appears in the marker boxes.
If it becomes necessary to compensate for minor shifting of
markers due to drift or external magnetic fields (particularly
if the instrument is moved after the markers are set), enter
the
CRT menu and select READOUT . Use the bezel controls to
adjust vertical position (VPOS) and horizontal position
(HPOS) until the center of the displayed test pattern is at the
center of the graticule.