Tektronix 323, Инструкция по эксплуатации

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Performance Check— Type 323
c. Set the low-frequency generator for a six-division hori­
zontal deflection, centered about the center vertical line,
at one kilohertz.
d. Without changing the output amplitude, increase the
output frequency of the generator to 10 kilohertz.
e. CHECK— CRT display 4.2 divisions, or greater, hori­
zontal deflection (not more than —3 dB).
31. Check External B lanking
REQUIREMENT— Five-volt positive peak signal blanks trace,
a. Change the following control settings:
VOLTS/DIV
INPUT
Trig/Horiz Coupling
TIME/DIV
2
DC
INT TRIG AC
5 /as
b. Connect the low-frequency generator to the VERT INPUT
connector through the 42-inch BNC cable and the BNC T
connector.
c. Set the low-frequency generator for a five-division
display (five volt positive peaks) at 100 kilohertz.
d. Connect the output of the BNC T connector to the EXT
BLANK jack with the six-inch BNC to banana plug patch
cord.
e. CHECK— CRT display for blanking of a portion of
each cycle of the waveform (see Fig. 5-6). The INTENSITY
control setting may need to be changed to show blanking.
f. Disconnect all test equipment.
Portion o f oach cytlo
blan ked out
Fig. 5 -6 . Typical CRT d is p la y when checking exte rna l b la n kin g .
32. Check In te rn a l T rigg e rin g O p e ra tio n
REQUIREMENT—Stable display in INT TRIG AC and ACLF
REJ positions of the Trig/Horiz Coupling switch with the
TRIGGER control set to - f AUTO, variable positive-slope
area, variable negative-slope area and — AUTO; check with
0.3-division display at 400 kilohertz and a 0.75-division dis­
play at four megahertz.
a. Change the following control settings:
VOLTS/DIV .1
TRIGGER + AUTO
TIME/DIV 5 /us
b. Connect the high-frequency constant-amplitude sine-
wave generator to the VERT INPUT connector through the GR
to BNC adapter 42-inch 50-ohm BNC cable, 50-ohm BNC
termination and the BNC T connector. Connect the output of
the BNC T connector to the EXT TRIG OR HORIZ INPUT
connector with a 42-inch 50-ohm BNC cable.
c. Set the constant-amplitude generator for a 0.3-divi-
sion display at 400 kilohertz.
d. CHECK— Stable CRT display is presented with the Trig/
Horiz Coupling switch set to INT TRIG AC and ACLF REJ.
e. Turn the TRIGGER control clockwise to the variable
positive-slope area.
f. CHECK— Stable CRT display can be obtained with the
Trig/Horiz Coupling switch set to INT TRIG AC and ACLF
REJ. TRIGGER control may be adjusted as necessary to
obtain a stable display.
g. Turn the TRIGGER control clockwise to the variable
negative-slope area.
h. CHECK—Stable CRT display can be obtained with the
Trig/Horiz Coupling switch set to INT TRIG AC and ACLF
REJ. TRIGGER control may be adjusted as necessary to
obtain a stable display.
i. Set the TRIGGER control to — AUTO.
j. CHECK— Stable CRT display is presented with the
Trig/Horiz Coupling switch set to INT TRIG AC and ACLF
REJ.
k. Set the constant-amplitude generator for a 0.75-divi­
sion display at four megahertz.
l
. Pull the X 1 0 HORIZ MAG switch out.
m. CHECK— Stable CRT display is presented with the
Trig/Horiz Coupling switch set to INT TRIG AC and ACLF
REJ.
n. Turn the Trigger control counterclockwise to the vari­
able negative-slope area.
o. CHECK— Stable CRT display can be obtained with the
Trig/Horiz Coupling switch set to INT TRIG AC and ACLF
REJ. TRIGGER control may be adjusted as necessary to
obtain a stable display.
p. Turn the TRIGGER control counterclockwise to the
variable positive-slope area.
q. CHECK—Stable CRT display can be obtained with the
Trig/Horiz Coupling switch set to INT TRIG AC and ACLF
REJ. TRIGGER control may be adjusted as necessary to
obtain a stable display.
r. Set the TRIGGER control to + Auto.
s. CHECK— Stable CRT display is presented with the Trig/
Horiz Coupling switch set to INT TRIG AC and ACLF REJ.
®T
5 -9