Performance Check/Calibration—Type 422 AC-DC
ioX
probe
Three-inch
screwdriver
Test
oscilloscope
Square-wave
generator
High-frequency
constant-amplitude
sine-wave
generator
Low-frequency
constant-amplitude
sine-wave generator
Time-mark
generator
/
GR to BNC
adapter
1 8-inch
50-ohm BNC
cable
50-ohm
BNC
termination
BNC to
dual binding
post
« t* ,
\
Low-capacitance
screwdriver
10X BNC
attenuators
Fig. 5-19. Test equipment required for steps 33 through 53.
Fig. 5-20. Location of CH 1 DC Level adjustment (Channel 1 Input
Amplifier board).
does not indicate optimum response but is provided for
reference only). Notice that the lower corner of the square
wave is the area of interest.
f. ADJUST—C353 (see Fig. 5-21A) for optimum
square-corner at the lower corner of the waveform (use
low-capacitance screwdriver).
g. Set the TRIGGERING Source switch to CH 1 & 2.
h. CHECK—Test oscilloscope for optimum square-wave
response similar to Fig. 5-21B.
i. ADJUST—C217 (see Fig. 5-21C) for optimum square-
corner on the lower corner of the waveform (use low-
capacitance screwdriver).
35. Adjust External Trigger Compensation
a. Disconnect the output of the 50-ohm termination
from the INPUT 1 connector and re-connect it to the TRIG
IN connector.
b. Set the TRIGGERING Source switch to EXT.
5-26
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