Performance Check/Calibration-314 Service
POWER SUPPLY AND DISPLAY
Test Equipment Required
1. Variable Autotransformer 3. 50-ohm BNC Cable
2.
Time Mark Generator 4. 50-ohm BNC Termination
Control Settings
Preset the 314 controls as follows:
INTENSITY
POWER
FOCUS
CH 1 and CH
2
VOLTS/DIV
VARIABLE
POSITION
lnput Coupling
DISPLAY
CH
2
INVERT
TRIGGERING
LEVEL
SLOPE
Coupling
Source
Mode
TIME/DIV
Variable
Horizontal POSITION
SWEEP MAG
STORAGE
STORE
ENHANCE
AUTO ERASE
ENHANCE LEVEL
VIEWING TIME
EXT ATTEN (side panel)
Power Source
Line Voltage Selector
Regulating Range
CCW
off (in)
midrange
10 m
CAL
midrange
GND
CH 1
out
CW
+
AC
INT
AUTO
1 ms
CA L
midrange
XI
out (non-store)
out
out
CCW
CCW
1 X
AC
115 V
M
1. Check Low-Line lndicator (and pilot light)
a. Connect variable autotransformer to power line.
b. Set variable autotransformer output voltage level to
115 V.
c. Plug 314 ac line cord into autotransformer output.
d. Pull 314 POWER switch on.
e. CHECK-that LOW LlNE lndicator (pilot light)
lights.
f. Reduce autotransformer output voltage to 103.5.
g. CHECK-LOW LlNE indicator still lights.
h. Reduce autotransformer output voltage further.
i. CHECK-that LOW LlNE lndicator blinks at some
voltage below 103.5.
2.
Check Trace Rotation
a. Switch CH 1 lnput Coupling to GND.
b.
Set FOCUS and INTENSITY controls for best
horizontal trace (normal viewing level and trace width).
c. Vertically position trace to graticule center.
d. CHECK-trace should be parallel to the center
graticule line.
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