Adjustment Procedure—2465B/2467B Service
2.
Adjust GRID BIAS (R4354)
a. Set SCALE ILLUMINATION (front panel) to full CCW
(OFF).
b. ADJUST—Grid Bias (R4354) if necessary to obtain
an X-Y dot near center screen.
c. Position the X-Y dot adjacent to a dot in the lower
row of readout dots using CH 1 and CH 2 position
con-
trols.
d.
ADJUST—Grid Bias (R4354) to match the intensity
of the X-Y dot to the readout dots. (Defocusing the display
may give better resolution.)
e. Press and release the upper TRIGGER COUPLING
button to advance to the next step.
3. Adjust TRACE ROTATION (Front Panel),
Y-AXIS (R4370), FOCUS PRE-ADJUST (FOCUS
RANGE) (R4430), ASTIG (Front Panel) and
GEOMETRY (R4350)
a. Using the CH 1 Vertical POSITION control, align the
trace with the center horizontal graticule line.
b. Position one of the At cursors to the center vertical
graticule line using either the A or the AREF OR DLY POS
control.
c. ADJUST—INTENSITY control (front panel) and
READOUT INTENSITY control (front panel) for a comfort-
able display.
d.
ADJUST—TRACE ROTATION control (front panel)
to align the trace with the center horizontal graticule line.
e. ADJUST—Y-Axis Alignment (R4370) to align the At
cursor with the center vertical graticule line.
f. Repeat parts d and e as necessary for the best
aligned display.
NOTE
Y-Axis
and TRACE ROTATION will remain adjusted
and are not interactive of the following adjustments.
g.
Center FOCUS control (front panel).
h. ADJUST—ASTIG control (front panel), in conjunction
with the Focus Pre-Adjust (R4430) for the sharpest possi-
ble display near the center graticule.
i. Position the At cursors on (or within 0.2 division of)
the first and eleventh vertical graticule lines using the
AREF OR DLY POS and A controls.
NOTE
ADJUST X1 Horizontal Gain (R860) if necessary to
align the At cursors as described in step i above. If
the Horizontal Gain (R860) is adjusted, it will be
necessary to perform CAL 01 to restore optimum
adjustment.
j.
Position CH 1 trace near top edge of the graticule
and position CH 2 trace near bottom edge of graticule.
k. ADJUST—Geometry (R4350) for minimum curvature
of both At cursors and traces.
I. ADJUST—Edge Focus (R4342) for sharpest readout
characters and cursor dots.
m. Press and release the upper TRIGGER COUPLING
switch to advance to the next step.
4. Adjust HIGH DRIVE FOCUS (R4340)
a. Connect a 158 MHz, 8-division signal from the Lev-
eled Sine-Wave Generator to the CH 1 input connector via
a 50
Q
BNC cable.
b. Center the display on the graticule.
NOTE
MCP Bias (R4365) may need to be adjusted slightly
CW for a visible display.
c. ADJUST—High Drive Focus (R4340) for the best
overall focus of the trace.
NOTE
Do not disconnect the Sine-Wave Generator from
the CH 1 input for the following two procedure
steps.
d.
Press and release the upper TRIGGER COUPLING
button to advance to the next step.
5-5
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