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3.2.1 0
DVM
ZERO
1.
Select DVM
display
and DC
mode.
2.
Short the center conductor
of
the DVM
input
port
(DVM
In) to
ground.
3. Adjust the
Coarse
DVM Zero and the
Fine
DVM
Zero potentiometers
on the
Front-Panel Interface
board (Figure
3-3)
for a zero
reading on
the
DVM
display.
3.2.1 1
CHARACTER GENERATOR
1.
Select
Monitor FM
function
and
Gen/Mon
Mtr
display.
2.
Adjust the Horizontal Character-Sweep-Width
potentiometer
on
the
Scope/DVM
Control board
(Figure
3-4)
so that
the
right-hand
edge
of
the
CRT character display
is
approximately
4.2
gra-
DVM XO.l
GAIN
ticule divisions
to
the
right
of
the
graticule center
line.
3.
Adjust
the
Vertical
Character-Sweep-Wid
t
h
potentiometer on
the
Scope/DVM Control board
(Figure
3-4) so
that
the
bottom edge of
the
CRT
display is
approximately
3.3
graticule
divisions
below
the
graticule
center line.
3.2.12
SPECTRUM
ANALYZER
CENTERING
1.
Select Spect
Analyzer
display.
Set the
dispersion
control
(Dispr)
on
the
front
panel to
1 MHz
(fully
counter
clockwise).
Set
the
center
frequency
of the
Analyzer
to
10.0
MHz.
2.
Connect
the 10
MHz
STD
port
on the
rear panel
to the
RF
In/
Out port on the front panel.
Set
the
RF step
attenuator
(Step)
to obtain
a
convenient
spectral
display.
HORIZONTAL
CHARACTER
SWEEP
WIDTH
•• ••
•• ••
•• ••
•• ••
..
.
..
1002 Hz
NOTCH
ADJUST
998
Hz
NOTCH
ADJUST
•• ••
•• ••
••
• •
•
SPECTRUM
ANALYZER
CENTERING
Figure
3-4.
Scope/
DVM
Control
Board
(
A7)-
Alignment Points
3-5
36930.112
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Table of Contents
Troubleshooting
