Model 182C
Adjustments
5-26.
HIGH VOLTAGE POWER SUPPLY ADJUSTMENT.
a. The
required
high voltage output
of
the supply is
-3150V ±0.5%.
b.
Using 1000:1 Divider Probe, monitor
voltage
at
—100V test point A1 A2TP4 with Digital
Voltmeter.
c. Note voltage reading which will be
approximately
—
O.IOOV. Accuracy in noting the voltage is essential for
proper adjustment.
d. Multiply reading obtained in
step c by 31.50.
This voltage is dangerous to
life.
e. Using 1000:1 Divider Probe, monitor high voltage
at —3150V test
point A6TP1 with Digital Voltmeter.
f. Set High Voltage adj A10R3 to obtain reading
exactly equivalent to result obtained in step d (approxi-
mately -3.150V).
5-27. INTENSITY LIMIT ADJUSTMENT.
a. Set DISPLAY to EXT.
b. Set
INTENSITY control to center (12 o'clock)
position.
c. Adjust
Intensity Limit Adj
A6R2 to just
extinguish
spot.
S28. ASTIGMATISM
ADJUSTMENT.
3. Set
DISPLAY
to
EXT.
b.
Center low intensity spot with HORIZONTAL
and
Vertical POSITION controls.
c. Adjust FOCUS
and ASTIG front-panel screwdriver
adjustment for smallest round spot.
5-29.
FLOOD GUN ADJUSTMENT.
a. Set
INTENSITY
fully
ccw.
b. Set SCALE fully cw,
c.
Adjust SCALE
PATTERN ADJ A2R4 for
uniform
Illumination Intensity.
d. Slowly rotate
SCALE control while
adjusting SCALE
PATTERN
ADJ A2R4 as necessary
to
maintain
uniform
illumination intensity
throughout entire range
of SCALE.
5-30.
TRACE
ALIGNMENT
ADJUSTMENT.
a. Set
MAGNIFIER
to XI.
b. Set EXT COUPLING to
AC.
c. Connect Oscillator 400 Hz 10V output to EXT
INPUT.
d.
Position trace on center horizontal
graticule line
e. Set INTENSITY and FOCUS
to
view sharply defined
trace.
f.
Adjust TRACE ALIGN front-panel screwdriver ad-
justment A2R23 to align trace parallel to horizontal
graticule line.
g.
Connect Oscillator 400 Hz 10V output to Vertical
plug-in.
h.
Set Vertical plug-in controls
to obtain
vertical
trace.
i. Adjust Y ALIGN adj A5R61 to align vertical trace
parallel
to
vertical
graticule line.
Note
Exact
adjustment is very important
if repeatable risetimes are to be ob-
tained
inboth-rUP
and —UP operation.
j.
Disconnect Oscillator
from Vertical plug-in input.
5-31.
GATE
AMPLIFIER RESPONSE ADJUSTMENT,
a.
Set following controls as applicable:
DISPLAY INT
Main Time/Div 0.1
^.iscc
Main Vernier CAL
Sweep Mode AUTO
Sweep Display MAIN
Delayed
Time/Div
OFF
h. Set Monitor Oscilloscope controls as follows:
Volls/Div
2
Time/Div
0,1
psec
Trigger Source INT
Slope
+
Coupling DC
c. Using 50:1 Divider Probe
and Monitor Oscilloscope,
observe signal
at collector of A7Q8.
5-5
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