
Performance Check/Calibration—Type 324
be triggered at any point along the negative slope of the
waveform. Display is not triggered at either extreme of
the negative-slope area except in —AUTO detent.
f. Change the following control settings:
V O L T S /D IV
5
TR IG G E R
+AUTO
E X T T R IG OR
10X
H O R IZ A T T E N
g. Set the low-frequency generator for a 3.2-division
display (16 volts peak to peak) at one kilohertz.
h. C H EC K —Rotate the T R IG G E R control throughout
the positive-slope area and check that the display can be
triggered at any point along the positive slope of the
waveform. Display is not triggered at either extreme of
the positive-slope area except in + AUTO detent.
i. CHECK—Rotate the T R IG G E R control throughout
the negative-slope area and check that the display can
be triggered at any point along the negative slope of the
waveform. Display is not triggered at either extreme of
the negative-slope area except in —AUTO detent.
j. Disconnect all test equipment.
e. Position the start of the trace to the left (first)
vertical line of the graticule.
f. CHECK—CRT display for duration of one cycle
between 5 and 8.3 divisions (repetition rate 800 hertz,
± 2 0 0 hertz).
g. Set the T IM E /D IV switch to .1 ms.
h. Set the V A R IA B L E T IM E /D IV control for one
complete cycle in 10 divisions.
i. CHECK—C RT display for length of positive seg
ment of the square wave between four and six divisions
(duty cycle 40% to 60%).
j. Change the following control settings:
k. Connect the 1X probe to the IN P U T connector.
46. Check Calibrator Operation
a. Change the following control settings:
I.
Position the probe tip so it is in contact with the
CAL O U T jack.
V O L T S /D IV
IN PU T
T R IG G E R
Trig/Horiz Coupling
T IM E /D IV
X 5 H O R IZ MAG
5 D IV CAL
GND
- A U TO
IN T T R IG AC
.1 ms
Pulled out
b. Position the rising portion of the waveform onto
the viewing area with the horizontal POSITION control
and center the display with the vertical POSITION con
trol.
m. CHECK—CRT display five divisions in amplitude.
NOTE
Parts m and o check that the Calibrator circuit is
functioning correctly. Accuracy o f Calibrator out
put voltage was set in step 4 of this procedure.
n. Set the V O L T S /D IV switch to 5 D IV CAL.
c. CHECK—CRT display for 0.1 division or less hori
zontal distance between the 10% and 90% points on the
leading edge of the calibrator waveform (two micro
seconds or less risetime).
d. Change the following control settings:
T R IG G E R
+ A U TO
T IM E /D IV
.2 ms
X 5 H O R IZ MAG
Pushed in
o. C H EC K —C RT display five divisions in amplitude.
This completes the calibration/checkout procedure for
the Type 324. Disconnect all test equipment and replace
th e cabinet. If the instrument has been completely
checked and adjusted to the tolerances given in this pro
cedure, it will meet or exceed the electrical character
istics given in Section 1.