Tektronix 323, Instruction Manual

Page: 82 / 170

Performance Check— Type 323
a. Change the following control settings:
INPUT GND
X 10 VERT GAIN Pulled out
b. Position the trace to the center horizontal line with
the vertical POSITION control.
c. CHECK— Set the INPUT switch to DC. Trace shift
should be neglible (0.085 division maximum).
14. Check Inp u t C apacitance
REQUIREMENT—47 pF, ± 4 pF.
a. Change the following control settings:
X 1 0 VERT GAIN Pushed in
TIME/DIV .5 ms
b. Connect the square-wave generator (Type 106) high-
amplitude output connector to the VERT INPUT connector
through the GR to BNC adapter 10X BNC attenuator 42-
inch 50-ohm BNC cable, 50-ohm BNC termination and 47
pF input RC normalizer, in given order.
c. Set the square-wave generator for a five-division
display at one kilohertz.
d. CHECK— CRT display for 0.2 division, or less, over­
shoot or rounding (47 pF, ± 4 pF).
e. Disconnect all test equipment.
15. Check V o lts /D iv is io n Switch Com pensation
REQUIREMENT—-Optimum square corner and flat top
within + 3 % or —3%, or total peak-to-peak aberrations not
to exceed 3%.
a. Connect the P6049 Probe to the VERT INPUT connector.
b. Install the GR to BNC adapter 10X BNC attenuator
and BNC post jack on the square-wave generator high-ampli­
tude output connector in given order.
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 setting
for optimum square corner and flat top within + 3 % or —3%
or total peak-to-peak aberrations not to exceed 3%. Readjust
the generator output and remove the attenuator as necessary
lo muinluin a five-division display (pull the X 10 VERT GAIN
switch for 5, 10 and 20 positions.
g. Disconnect all test equipment.
16. Check H igh-Frequency Com pensation
REQUIREMENT—Optimum square-wave response with peak
aberrations not to exceed + 2 % or —2%, or total aber­
rations not to exceed 3% peak to peak.
a. Change the following conrol settings:
X 10 VERT GAIN Pushed in
TIME/DIV 5 [is
X 1 0 HORIZ MAG Pulled out
b. Connect the square-wave generator fast-rise + output
connector to the VERT INPUT connector through the GR to
BNC adapter, 42-inch BNC cable, 10X BNC attenuator
and the 50-ohm BNC termination.
c. Set the square-wave generator for a four-division dis­
play at 100 kilohertz.
d. Move the leading edge of the square-wave onto the
viewing area with the horizontal POSITION control.
e. CHECK— CRT display for optimum square-wave re­
sponse similar to Fig. 5-3 with peak aberrations not to ex­
ceed + 2 % or —2%, or total aberrations not to exceed 3%
peak to peak.
f. Disconnect all test equipment.
Fig. 5 -3 . Typical CRT d isp la y showing correct high-frequency com­
pensation.
17. Check U pper V ertical B an d w id th Lim it
REQUIREMENT— Not more than —3 dB at four megahertz.
a. Change the following control settings:
TIME/DIV 1 ms
X 1 0 HORIZ MAG Pushed in
b. Connect the high-frequency constant-amplitude sine-
wave generator (Type 191) to the VERT INPUT connector
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