Tektronix 323, Инструкция по эксплуатации

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Performance Check— Type 323
EXT HORIZ VAR
X 10 HORIZ MAG
CAL (clockwise)
Pushed in
e. Position the first ten-division portion of the total mag­
nified sweep onto the viewing area with the horizontal
POSITION control.
f. CHECK— One marker each division between the sec­
ond and tenth vertical lines. Marker at tenth Vertical line
must be within 0.32 division (within 4%) of that line when the
marker at the second vertical line is positioned exactly.
g. Repeat this check for each ten division portion of the
total magnified sweep length.
TABLE 5-3
M agnified Sweep Timing Accuracy
TIME/DIV
switch
setting
Time-mark
generator
output
CRT display
( m arkers/
division)
A llow a ble
error for
given
accuracy
5 /us 0.5 microsecond 1 0.4 division
(within 5%) 10/us 1 microsecond 1
20 /us 1 microsecond 2
0.32 division
(within 4%)
50 /us 5 microsecond 1
.1 ms 10 microsecond 1
.2 ms 10 microsecond 2
.5 ms 50 microsecond 1
1 ms 0.1 millisecond 1
2 ms 0.1 millisecond 2
5 ms 0.5 millisecond 1
10 ms
1 millisecond 1
20 ms
1 millisecond 2
50 ms 5 millisecond 1
.1 s 10 millisecond 1
,2 s 10 millisecond 2
.5 s 50 millisecond 1
0.4 division
(within 5%) 1 s 0.1 second 1
b. Position the dot to the left vertical line of the graticule
with the horizontal POSITION control.
c. Connect the standard amplitude calibrator to the EXT
TRIG OR HORIZ INPUT connector with the 42-inch BNC
cable.
d. Set the standard amplitude calibrator for a two-volt
square-wave output.
e. CHECK— CRT display for horizontal deflection of
6.7 to 10 divisions between dots (200 to 300 millivolts/divi-
sion).
27. Check External H o rizo n ta l D eflection Factor
w ith 10 X A tte n u a tio n
REQUIREMENT—Two to three volfs/division.
a. Set the EXT TRIG OR HORIZ ATTEN switch (side panel)
to 10X.
b. Set the standard amplitude calibrator for a 20-volt
square-wave output.
c. CHECK— CRT display for horizontal deflection of 6.7
to 10 divisions between dots (two to three volts/division).
28. Check External H o rizo n ta l V a ria b le C ontrol
Range
REQUIREMENT— 10:1 range, or greater.
a. Turn the EXT HORIZ VAR control fully counterclockwise.
b. CHECK— CRT display not more than one-tenth of the
deflection measured in previous step (10:1 range, or greater).
25. Check External H o rizo n ta l V a ria b le Balance
REQUIREMENT— No trace shift as EXT HORIZ VAR con­
trol is rotated throughout its range.
a. Change the following control settings:
INPUT
Trig/Horiz Coupling
EXT TRIG OR HORIZ
ATTEN
TIME/DIV
GND
EXT TRIG OR HORIZ
DC
I X
EXT HORIZ
b. Position the dot to the center of the graticule with
the POSITION controls.
c. CHECK— Rotate the EXT HORIZ VAR control (VARIABLE
TIME/DIV) throughout its range. Dot should not move hori­
zontally.
26. Check External H o rizo n ta l D eflection Factor
REQUIREMENT— 200 to 300 millivolts/division.
a. Change the following control settings:
29. Check External H o rizo n ta l C oupling
REQUIREMENT— Correct signal coupling in the EXT TRIG
OR HORIZ positions of the Trig/Horiz Coupling switch.
a. Position the left dot of the display to the center ver­
tical line with the horizontal POSITION control.
b. Set the Trig/Horiz Coupling switch to EXT TRIG AC.
c. CHECK— CRT display for horizontal deflection centered
about the center vertical line.
d. Disconnect all test equipment.
30. Check External H o rizo n ta l B an d w id th
REQUIREMENT— Not more than —3dB at 10 kilohertz.
a. Change the following control settings:
EXT TRIG OR HORIZ 1 X
ATTEN
EXT HORIZ VAR CAL (fully clockwise)
b. Connect the low-frequency sine-wave generator to the
EXT TRIG OR HORIZ INPUT connector through the 42-inch
50-ohm BNC cable and 50-ohm BNC termination.
5-8