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2-2
Step
Control
Position/Operation
Observation
1
Oscilloscope
Trig level and slope, both
CH2:
Square wave that begins on positive
positive.
going edge.
CH1:
15 Vp-p sine wave.
2
Dial and
Rotate dial full cw, vernier full
CH2:
Square wave remains in sync for all dia
VERNIER/SYM
ccw. Then the
opposite.
Return
positions. Range is greater than 2
Hz
t
dial to
1.0,
vernier to CAL.
2000 Hz
(1000:1).
3
FREO MULT
Rotate to all
positions.
Frequency is 1
x
each range position.
Return to 1K position.
4
AMPLITUDE
Set to 6 Vp-p on
scope.
CH1: Amplitude decreases to approximately
6 Vp-p.
5
DC OFFSET
Depress DC OFFSETswitch, then Full ccw gives negative offset. Clipping
rotate DC OFFSETControl cv«.
occurs when the
offset
plus waveform
(Extended DC OFFSETupon
peak
amplitude
exceeds
approximately
completion.)
± 7.5V into 50n. Initially the negative peak is
clipped, but as the dc offset is rotated cw the
clipping of the negative peak disappears and
eventually the positive peak begins to clip.
Table
2·1.
Checkout Procedure
Figure 2·2. Main Generator Check Setup
HORIZ SWP: 0.5 ms/DIV
VERT,
CH1: 5V/DIV
CH2: 2V/DIV
TRIG MODE: DC
OSCILLOSCOPE
o
TRIG
CH1 CH2
FUNC
OUT
Model 193
TRIG LEVEL
10 o'clock
FUNCTION
. .
. . .
.
.
.
.
. .
.
.
.
.
.
.
.
.
. . .
.
. . .
..
'\;
DC OFFSET (On/Off)
OFF (Extended)
DC OFFSET (Variable Control)
ccw
OUTPUT ATTEN
40, 20,
10
All extended
AMPLITUDE
MAX (cw)
SUPPRESSED CARRIER
AM (extended)
AM CARRIER
LEVEL/NULL
ccw
AUXGEN MODE
AUXOUTONLY
WIDTH/dF/dM
cw
AUX GEN FU NC
. . .
. .
. .
.
.
. . .
. .
.
.
.
.
.
. .
. .
..
'\;
AUX GEN SYM M ETRY
cw
AUX GEN FREO
100-3K
AUX GEN VERNIER
MAX (cw)
POWER
ON
Control
Position
FREO/START FREO
1.0
FREO MULT
1K
VERNIERISYM
FREOCAL(cw)
SYM
Off (extended)
MODE
CONT
the front of this manual. A dual
trace,
150 MHz band-
width oscilloscope
with X10 time base magnification,
a 50n
load,
a coaxial tee and three 50n cables are
required to perform this
checkout.
Set up as in figure 2-2 and preset the generator front
panel controls as follows; then perform the steps in
table 2-1.
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Table of Contents
Troubleshooting
