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input
(Ext). Turn the Code Synthesizer and
the
Ext
Level
control OFF, and
the
1
KHz Level
con-
trol up
about
half
way.
3.
Connect
an
oscilloscope
with a calibrated vertical
input to
TP6 on
the Scope
Amplifier board
(Figure
3-2).
4.
Using the
front panel's horizontal
vernier control,
adjust
for
a
3
Vp-p
amplitude
on the sinewave
at
TP6.
5.
With
3
Vp-p at
TP6, adjust
the
Horizontal
Gain
potentiometer
(Figure
3-2)
for
a CRT
horizontal
trace of 6
em.
(Use the
front panel controls
to
position
the
trace
at a convenient
place near the
center of
the
CRT.)
3.2.8 CRT VERTICAL GAIN
1.
Connect
the Mod Out port
to
the
vertical
input
port (Vert In)
on the
System
Analyzer's
front
panel.
2.
Select
Generate FM
function
and
Scope
DC
dis-
play.
Set the
Horiz
control for a sweep
rate
of
1
mSec/Div
and the
horizontal
vernier
to
Cal.
Set
the
Vert
control
for an input sensitivity of 1
V
/Div
and the vertical
vernier to Cal.
3.
Turn
the
Code Synthesizer and
the
Ext
Level con-
trol
OFF,
and
the
1 KHz Level
control
up
about
halfway.
4.
Connect
an oscilloscope with
a calibrated vertical
input
to
TPl
on
the Scope Amplifier board
(Figure
3-2).
5. Using the
l KHz
Level control
on the
front
panel,
adjust
for
a
3
Vp-p amplitude on the sinewave at
TPl.
6.
With
3
Vp-p at TP1, adjust
the
Vertical Gain
potentiometer
(Figure
3-2)
for a 6-cm p-p sine-
wave on
t
he
CRT. (Use
the
front
panel's
Horiz
and
Vert position
controls
to
center the
waveform
on
the CRT.)
3.2.9
VERTICAL INPUT GAIN
1.
Select Generate FM function and
Scope
DC
dis-
play. Set
the Horiz
control for a sweep
rate
of
1
mSec/Div
and the
horizontal
vernier
to
Cal. Set
the Vert control
for
an input
sensitivity
of1 V /Div,
and
the
vertical
vernier to Cal.
2.
Connect an
oscilloscope with a calibrated vertical
input
to the Mod
Out
port
on
the
front
panel.
3.
Turn
the
Code Synthesizer and
the
Ext
Level con-
trol
OFF and
adjust the
l
KHz Level
control
for a
6 Vp-p sinewave on the attached
oscilloscope.
4. Disconnect the oscilloscope from
the Mod
Out port
and
connect the
Mod
Out
port to
the
Vert
input
port.
5.
Adjust
the
Input
Vertical Gain
potentiometer
on
the Front-Panel
Interface
board
(Figure
3-3)
for a
6-cm p-p
sinewave
on the CRT. (Use the front
panel's
Horiz and
Vert position controls to center
the waveform on the CRT.)
DVM ZERO (FINE
•
mD• • • • • • • • •
KC.
K7
~
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VM
BUFF
ER
GAIN
r
36930·
11
1
Figure
3-3.
Front
Panel Interface
Board (
AI5)
- Alignment
Points
3-4
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Table of Contents
Troubleshooting
