Tektronix 323, Инструкция по эксплуатации

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I. Set the low-frequency generator for a 0.3-division dis­
play at 30 hertz.
Calibration— Type 323
m. CHECK— Stable CRT display is presented.
n. Turn the TRIGGER control counterclockwise to the vari­
able negative-slope area.
o. CHECK— Stable CRT display can be obtained with the
TRIGGER control.
p. Turn the TRIGGER control counterclockwise to the vari­
able positive-slope area.
q. CHECK— Stable CRT display can be obtained with the
TRIGGER control.
r. Set the TRIGGER control to + AUTO.
s. CHECK—Stable CRT display is presented.
49. Check Low-Frequency Reject Operation
a. Change the following control settings:
Trig/Horiz Coupling INT TRIG ACLF REJ
TIME/DIV .1 ms
b. Set the low-frequency generator for a 0.3-division dis­
play at 30 kilohertz.
c. CHECK—Stable CRT display can be obtained with the
TRIGGER control set to + and — AUTO and in the vari­
able positive- and negative-slope areas (adjust as necessary).
d. Without changing the output amplitude, set the low-
frequency generator to 30 hertz.
e. Set the TIME/DIV switch to 10 ms.
f. CHECK— Stable CRT display cannot be obtained at
any setting of the TRIGGER control.
50. Check Trigger Slope Operation
a. Change the following control settings:
TRIGGER
Trig/Horiz Coupling
TIME/DIV
b. Set the low-frequency
display at one kilohertz.
+ AUTO
INT TRIG AC
.5 ms
generator for a four-division
c. CHECK— CRT display starts on the positive slope of
the waveform (see Fig. 6-22A).
d. Turn the TRIGGER control clockwise until a stable dis­
play is obtained in the positive-slope area.
e. CHECK— CRT display starts on the pos'tive slope of
the waveform.
f. Turn the TRIGGER control clockwise until a stable dis­
play is obtained in the negative-slope area.
g. CHECK— CRT display starts on the negative slope of
the waveform (see Fig. 6-22B).
Fig. 6 -2 2 . (A ) Typical CRT d isp la y when checking positive-slope
trig g e rin g , (B) typ ica l CRT d isp la y when checking negative-slope
trig g e rin g .
h. Set the TRIGGER control to — AUTO.
i. CHECK— CRT display starts on the negative slope of
the waveform.
51. Check TRIGGER Control Range
a. Remove the 50-ohm BNC termination and reconnect the
low-frequency sine-wave generator to the BNC T connector
through the 42-inch BNC cable.
b. Change the following control settings:
VOLTS/DIV .5
TRIGGER + AUTO
Trig/Horiz Coupling EXT TRIG AC
c. Set the low-frequency generator for a 3.2-division
display (1.6 volts peak to peak) at one kilohertz.
d. CHECK— Rotate the TRIGGER control throughout the
positive-slope area and check that the display can be trig­
gered (stable display) at any point along the positive slope
of the waveform (indicates TRIGGER control range of at
least - f and — 0.8 volts). Display is not triggered at either
extreme of the positive-slope area except in - f AUTO detent.
e. CHECK— Rotate the TRIGGER control throughout the
negative-slope area and check that the display can be trig­
gered at any point along the negative slope of the wave­
form. Display is not triggered at either extreme of the neg­
ative-slope area except in — AUTO detent.
®T
6-27