Tektronix 323, Инструкция по эксплуатации

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Calibration— Type 323
Fig. 6 -9 . Typical CRT d ispla y when checking in p u t capacitance.
c. Connect the probe tip to the BNC post jack.
d. Set the square-wave generator for a five-division display
at one kilohertz.
e. Compensate the probe as described in the probe instruc­
tion manual.
f. CHECK—CRT display at each VOLTS/DIV switch set­
ting for optimum square corner and flat top within + 3 % or
—3%, or total peak-to-peak aberrations not to exceed 3%.
Readjust the generator at each setting, remove the attenuator
and pull the X 10 VERT GAIN switch as given in Table 6-3
to maintain a five-division display.
g. ADJUST—VOLTS/DIV switch compensation as given in
Table 6-3. First adjust for optimum square corner on the dis­
play and then for optimum flat top. Readjust the generator
output with each setting of the VOLTS/DIV switch, remove
the attenuator and pull the X 10 VERT GAIN switch as given
in Table 6-3 to provide five divisions of deflection. Fig.
6-1 OB shows the location of the variable capacitors.
h. Disconnect all test equipment and remove the calibra­
tion shield.
25. Adjust Internal Trigger Compensation O
a. Change the following control settings:
' M
7
E
V
* *
<0
Incorrect
top ot fl a t)
MM
’
L
Fig. 6 -1 0 . (A ) Typical CRT d isp la y showing correct and incorrect
com pensation, (B) location o f com pensation adjustm ents (A tte n u a ­
tor b o a rd ).
VOLTS/DIV .5
X 10 VERT GAIN Pushed in
b. Connect the square-wave generator high-amplitude
output connector to the VERT INPUT connector through the
GR to BNC adapter, 42-inch 50-ohm BNC cable and 50-
ohm BNC termination.
c. Connect the 10X probe to the input connector of the
test oscilloscope.
d. Set the test oscilloscope for a vertical deflection fac­
tor of 20 millivolts/division (0.2 volts/division at 10X probe
tip) at a sweep rate of 0.5 milliseconds/division. Adjust the
triggering controls when necessary to provide a stable dis­
play.
®
6-15