Calibration— Type 1A1
Fig. 7 -1 3
Equipment letup For ite p i I I through 16.
Control Settings
TYPE 547 Oscilloscope
Horizontal Display
B
Sweep Magnifier
XI Off
Single Sweep Switch
Normal
Triggering Level
Fully clockwise and
pushed in
Triggering Source
Norm Int
Triggering Coupling
AC
Trigger Slopo
+
Triggering Mode
Auto Stability
Timc/Cm
,5 msec
Variable (Time/Cm)
Calibrated
Horizontal Position
Trace positioned to start
at left graticule line
Amplitude Calibrator
Off
Type 1A 1
MODE
CH 2
POSITION (Channel 1)
At or near midrange
POSITION (Channel 21
PULL FOR INVERT
Trace positioned to
graticule center
(both chonnels)
VARIABLE VOLTS/CM
Normal or in
(both channels}
CALIB
VOLTS/CM
(both channelsl
.005
INPUT SELECTOR
(both channels)
GND
11. Check Gate Current for Channel 2
a. Equipment setup is shown in Fig. 7-13
b. Connect a 50-ohm termination to the Channel 2 IN
PUT connector.
c. Check that the Channel 2 VOLTS/CM switch is set to
.005 and the trace is positioned to the horizontal centerline.
d. CHECK— Set the Channel 2 INPUT SELECTOR switch
to AC and note the amount of trace shift; should not ex
ceed 2 mm.
12. Check Gate Current for Channel 1
o. Equipment setup is shown in Fig. 7-13.
b. Move the 50-ohm termination from the Channel 2 IN
PUT connector to the Chonnel 1 INPUT connector.
c. Set MODE switch to CH 1 and check that the Channel
1 VOLTS/CM switch is set to .005.
d. Position the trace to the horizontal centerline with
the Channel 1 POSITION control.
7-12