Checks
and
Adjustments
Introduction
The
checks
and
adjustments
in
this section eliminate some significant sources
of measurement error
and
improve measurement confidence. If adjustments
are
required beyond the scope of this section, refer the instrument to a qualified
service technician.
Initial Setup
1.
Press
in
the POWER switch button
(ON)
and allow the instrument to warm
up
(20 minutes
is
recommended for maximum accuracy).
2.
Set instrument controls to obtain a display:
READOUT INTENSITY
INTENSITY
Midrange between "OFF"
and
fully clockwise
Midrange
FOCUS Midrange
VERTICAL MODE
CH
1
CH
1 Input Coupling 1 Mfl
DC
3.
Connect the Calibrator output to the
CH
1 input with a standard accessory
probe
and
ground the probe near the Calibrator output.
4.
Press the AUTO Setup button to obtain a display. (If the STEP indicator
is
illuminated, press RECALL to cancel the Step mode, then press AUTO to
obtain a
display.) Adjust the INTENSITY and READOUT INTENSITY
controls
as
desired. Set the FOCUS control for the best trace definition.
Trace Rotation
and
Adjustment
1.
Preset instrument controls
and
obtain a display
as
described
in
"Initial
Setup."
2.
Set
CH
1 Input Coupling to
GND,
20
MHz
BW
LIMIT
on,
and
adjust the
CH
1 POSITION control to position the trace
on
the center horizontal
graticule
line.
3.
If the trace
is
not parallel to the center horizontal graticule
line,
use a
small-bladed screwdriver to adjust the TRACE ROTATION control
and
align
the trace with the center horizontal graticule
line.
2465A/2455A/2445A Operators
4-1
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